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HEAT TRANSFER / INTERACTIVE 3D

Air-cooled heat exchanger concept

Explore three tube rows, individual ring fins, two forced-draft fan bays and separate header/drive components.

Static preview of the air-cooled heat exchanger concept schematic
Loading the 3D model…

Drag to orbit · Scroll or pinch to zoom · Select a visible part or use the parts list. Keyboard: focus the view and use arrow keys to orbit.

HOW TO READ THIS MODEL

The system, explained.

An air-cooled heat exchanger transfers heat from process fluid inside tubes to air around their external surfaces. Headers connect the tube ends, while fins add external surface. A forced-draft arrangement places fans below the bundle; an induced-draft arrangement places them above. This original single-pass concept uses twenty-four hollow tubes, discrete annular fin markers and two lower fan bays. Inspect the separate process and air-side regions, then compare them with a shell-and-tube exchanger. Geometry supplies no calculated cooling duty or operating result.

Model scope and limits

Original static forced-draft single-pass geometry with invented dimensions, twenty-four open tubes, 768 separately named fin instances, two eight-blade fans, header sheets/access holes/closed plug markers, motor/coupling/perpendicular reducer-shaft and static bearing markers. Discrete rings are a teaching abstraction rather than a qualified fin attachment or helical fabrication. Blades are original twisted markers, not verified airfoils. No source artwork, CAD or product dimensions imported. No temperature, heat duty, pressure drop, airflow, recirculation, fan curve/noise, gear contact, motor electrical internals, winterization, louvers, complete controls/protection, rated pressure boundaries, thread forms, fit, full collision, structural or guarding qualification. No equipment selection, operating or maintenance procedure.

Further reading: Hudson / Chart-hosted 2004 technical paper: general air-cooler components (PDF) ↗

Source links support further study; no affiliation or endorsement is implied.

CHECK YOUR UNDERSTANDING

Which illustrated surfaces are outside the process-fluid tube bore?

Choose an answer

GUIDED COMPONENT STUDY

Trace the system.

Read each explanation, then focus its component in the explorer. This is a learning route through the model, with no operating or maintenance sequence.

  1. Find a process boundary

    The gold neck opens through a header side-wall bore. A separate blue neck marks the far header boundary. These original labels identify the tube-side region; they do not specify service, pressure, inlet/outlet temperatures or piping.

  2. Look through a straight tube

    This separate annular tube runs between two drilled tube-sheet plates. Export checks follow its actual centreline through the bundle and both sheets, and distinguish the bore from retained tube wall. No tube-end weld, expansion or rated joint is established.

  3. Inspect one external fin

    The ring surrounds the tube exterior, leaving its centre open. Thirty-two spaced rings appear on each tube. They share mesh data but remain separately selectable. This depicts an external-surface concept, without a fin bond, helical manufacturing method or thermal performance.

  4. Distinguish sheet from header chamber

    Twenty-four actual bores align with the tube rows. Separate walls enclose the header region beyond the sheet. This concept has no partition and makes a single-pass relationship; it is not a multi-pass design or qualified pressure boundary.

  5. Recognize the separate closed plugs

    A solid smooth stem lies through one external access hole, with a separate hexagonal head. The plug-plate bore and closed stem are different meshes. Their view does not provide a thread, sealing result, rated retention or equipment-opening procedure.

  6. Compare fan and tube positions

    An original tapered, twisted blade lies below the lowest tube row and inside its ring. Eight blades meet each hub. Selected vertex-envelope checks establish those depicted positions only; they do not establish airflow, efficiency, an airfoil, operating tip clearance or balance.

  7. Find the air-side plenum

    The side wall lies between the fan deck and the tube bundle. The deck has two real circular fan openings. Reveal and section are teaching controls that expose these pieces; there is no aerodynamic distribution, air leakage or recirculation calculation.

  8. Trace the drive-component regions

    The motor shaft, separate coupling markers and horizontal reducer input connect toward a perpendicular vertical fan shaft. Bearing rings and individual static rolling-element markers are visible after revealing covers. Gear-region rings omit meshing teeth; no reduction ratio, power, electrical system, fit, lubrication or qualified guarding is supplied.

Additional primary references:

Ask the wider gas-processing questions.

Read the six-question Alberta gas-processing guide ↗

Compare these independent equipment concepts and see why an expansion machine, exchanger core and cold separator do not make a complete recovery plant.

ACCESSIBLE COMPONENT REFERENCE

Every part, in plain language.

Search all components ↗Model provenance ↗
Column -2.9 / -1.48

Separate structural column marker; loads, anchoring and foundations are not designed.

Column foot -2.9 / -1.48

Separate footing marker. No foundation or anchor specification.

Column -2.9 / 1.48

Separate structural column marker; loads, anchoring and foundations are not designed.

Column foot -2.9 / 1.48

Separate footing marker. No foundation or anchor specification.

Column 2.9 / -1.48

Separate structural column marker; loads, anchoring and foundations are not designed.

Column foot 2.9 / -1.48

Separate footing marker. No foundation or anchor specification.

Column 2.9 / 1.48

Separate structural column marker; loads, anchoring and foundations are not designed.

Column foot 2.9 / 1.48

Separate footing marker. No foundation or anchor specification.

Bundle side frame -1.48

Original bundle frame enclosing tube rows; no structural or thermal-expansion design.

Drive support rail -1.48

Drive-platform support marker. No access/work platform or structural qualification.

Bundle side frame 1.48

Original bundle frame enclosing tube rows; no structural or thermal-expansion design.

Drive support rail 1.48

Drive-platform support marker. No access/work platform or structural qualification.

Frame cross tie -2.9

Separate cross tie below the mechanical drives. No load capacity.

Frame cross tie 0

Separate cross tie below the mechanical drives. No load capacity.

Frame cross tie 2.9

Separate cross tie below the mechanical drives. No load capacity.

Motor support -1.3

Drive support marker, without fabrication or field mounting data.

Motor support 1.3

Drive support marker, without fabrication or field mounting data.

Row 1 tube 1

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 1 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 1 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 2 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 2 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 3 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 3 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 4 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 4 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 5 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 5 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 6 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 6 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 7 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 7 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 1 tube 8 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 1 tube 8 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 1 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 1 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 2 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 2 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 3 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 3 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 4 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 4 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 5 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 5 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 6 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 6 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 7 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 7 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 2 tube 8 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 2 tube 8 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 1 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 1 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 2 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 2 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 3 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 3 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 4 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 4 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 5 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 5 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 6 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 6 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 7 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 7 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8

Original open straight tube through both tube sheets. No rated tube wall, material or process condition.

Row 3 tube 8 fin 1

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 2

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 3

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 4

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 5

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 6

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 7

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 8

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 9

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 10

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 11

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 12

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 13

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 14

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 15

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 16

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 17

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 18

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 19

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 20

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 21

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 22

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 23

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 24

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 25

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 26

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 27

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 28

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 29

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 30

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 31

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Row 3 tube 8 fin 32

Separate annular fin marker outside the tube. Discrete rings are a teaching abstraction, not a qualified fin attachment or helical fabrication.

Inlet header tube sheet

Separate tube-sheet plate with twenty-four actual tube bores. No expanded/welded joint, ligaments or pressure qualification.

Inlet header plug plate

Separate external header plate with twenty-four actual access holes and independent closed plug markers. No threads, retention or pressure class.

Inlet header wall 2.56

Separate header closure wall. No weld detail or pressure boundary qualification.

Inlet header wall 3.72

Separate header closure wall. No weld detail or pressure boundary qualification.

Inlet header side wall -1.36

Separate header side wall; one side has an original connection bore. No qualified weld or corner construction.

Inlet header side wall 1.36

Separate header side wall; one side has an original connection bore. No qualified weld or corner construction.

Inlet header plug 1 / 1 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 1 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 2 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 2 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 3 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 3 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 4 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 4 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 5 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 5 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 6 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 6 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 7 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 7 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 1 / 8 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 1 / 8 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 1 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 1 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 2 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 2 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 3 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 3 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 4 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 4 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 5 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 5 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 6 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 6 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 7 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 7 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 2 / 8 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 2 / 8 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 1 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 1 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 2 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 2 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 3 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 3 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 4 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 4 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 5 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 5 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 6 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 6 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 7 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 7 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header plug 3 / 8 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Inlet header plug 3 / 8 head

Separate hexagonal plug-head marker. No torque or rated closure.

Inlet header process neck

Hollow conceptual process boundary into the header. No service, pressure, flow, temperature or product selection.

Inlet header process flange

Separate open flange marker with six actual stud bores. No standard facing or pressure class.

Inlet header joint stud 1

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Inlet header joint washer 1

Separate annular washer marker. No rated retention.

Inlet header joint nut 1

Separate circular bored nut marker; no thread or torque specification.

Inlet header joint stud 2

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Inlet header joint washer 2

Separate annular washer marker. No rated retention.

Inlet header joint nut 2

Separate circular bored nut marker; no thread or torque specification.

Inlet header joint stud 3

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Inlet header joint washer 3

Separate annular washer marker. No rated retention.

Inlet header joint nut 3

Separate circular bored nut marker; no thread or torque specification.

Inlet header joint stud 4

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Inlet header joint washer 4

Separate annular washer marker. No rated retention.

Inlet header joint nut 4

Separate circular bored nut marker; no thread or torque specification.

Inlet header joint stud 5

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Inlet header joint washer 5

Separate annular washer marker. No rated retention.

Inlet header joint nut 5

Separate circular bored nut marker; no thread or torque specification.

Inlet header joint stud 6

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Inlet header joint washer 6

Separate annular washer marker. No rated retention.

Inlet header joint nut 6

Separate circular bored nut marker; no thread or torque specification.

Outlet header tube sheet

Separate tube-sheet plate with twenty-four actual tube bores. No expanded/welded joint, ligaments or pressure qualification.

Outlet header plug plate

Separate external header plate with twenty-four actual access holes and independent closed plug markers. No threads, retention or pressure class.

Outlet header wall 2.56

Separate header closure wall. No weld detail or pressure boundary qualification.

Outlet header wall 3.72

Separate header closure wall. No weld detail or pressure boundary qualification.

Outlet header side wall -1.36

Separate header side wall; one side has an original connection bore. No qualified weld or corner construction.

Outlet header side wall 1.36

Separate header side wall; one side has an original connection bore. No qualified weld or corner construction.

Outlet header plug 1 / 1 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 1 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 2 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 2 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 3 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 3 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 4 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 4 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 5 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 5 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 6 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 6 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 7 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 7 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 1 / 8 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 1 / 8 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 1 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 1 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 2 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 2 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 3 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 3 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 4 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 4 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 5 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 5 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 6 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 6 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 7 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 7 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 2 / 8 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 2 / 8 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 1 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 1 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 2 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 2 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 3 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 3 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 4 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 4 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 5 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 5 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 6 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 6 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 7 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 7 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header plug 3 / 8 stem

Solid smooth closure stem through a geometric access hole. No thread, sealing, retention or opening procedure.

Outlet header plug 3 / 8 head

Separate hexagonal plug-head marker. No torque or rated closure.

Outlet header process neck

Hollow conceptual process boundary into the header. No service, pressure, flow, temperature or product selection.

Outlet header process flange

Separate open flange marker with six actual stud bores. No standard facing or pressure class.

Outlet header joint stud 1

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Outlet header joint washer 1

Separate annular washer marker. No rated retention.

Outlet header joint nut 1

Separate circular bored nut marker; no thread or torque specification.

Outlet header joint stud 2

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Outlet header joint washer 2

Separate annular washer marker. No rated retention.

Outlet header joint nut 2

Separate circular bored nut marker; no thread or torque specification.

Outlet header joint stud 3

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Outlet header joint washer 3

Separate annular washer marker. No rated retention.

Outlet header joint nut 3

Separate circular bored nut marker; no thread or torque specification.

Outlet header joint stud 4

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Outlet header joint washer 4

Separate annular washer marker. No rated retention.

Outlet header joint nut 4

Separate circular bored nut marker; no thread or torque specification.

Outlet header joint stud 5

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Outlet header joint washer 5

Separate annular washer marker. No rated retention.

Outlet header joint nut 5

Separate circular bored nut marker; no thread or torque specification.

Outlet header joint stud 6

Separate smooth stud through a geometric flange hole. No thread, bolt load or qualified joint.

Outlet header joint washer 6

Separate annular washer marker. No rated retention.

Outlet header joint nut 6

Separate circular bored nut marker; no thread or torque specification.

Fan deck

Separate fan deck with two real circular openings below the tube bundle. No airflow distribution, structure or clearance qualification.

Plenum side wall -1.45

Separate air-side enclosure marker between fan deck and bundle. No leakage, thermal or airflow simulation.

Plenum side wall 1.45

Separate air-side enclosure marker between fan deck and bundle. No leakage, thermal or airflow simulation.

Plenum end wall -2.88

Separate end-wall marker. No qualified air seal or housing.

Plenum end wall 2.88

Separate end-wall marker. No qualified air seal or housing.

Fan 1 ring

Separate hollow fan-ring marker. Blade envelope is geometrically inside it; no operating tip clearance or fan curve.

Fan 1 hub

Solid hub marker with eight independent blade roots. No adjustable pitch, balance or qualified retention.

Fan 1 blade 1

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 1

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 2

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 2

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 3

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 3

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 4

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 4

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 5

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 5

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 6

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 6

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 7

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 7

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 blade 8

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 1 root fastener 8

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 1 vertical drive shaft

Separate vertical shaft between reducer marker and fan hub. No torsion, running fit or qualified coupling.

Fan 1 bearing outer 1.32

Static bearing outer-ring marker. No load rating or fit.

Fan 1 bearing inner 1.32

Static bearing inner-ring marker. No qualified running clearance.

Fan 1 bearing element 1.32 / 1

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 2

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 3

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 4

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 5

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 6

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 7

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.32 / 8

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing outer 1.68

Static bearing outer-ring marker. No load rating or fit.

Fan 1 bearing inner 1.68

Static bearing inner-ring marker. No qualified running clearance.

Fan 1 bearing element 1.68 / 1

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 2

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 3

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 4

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 5

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 6

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 7

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 bearing element 1.68 / 8

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 1 reducer enclosure

Separate solid reducer-enclosure teaching cover; reveal exposes perpendicular shaft markers. No rated gear train or lubrication system.

Fan 1 horizontal input shaft

Separate horizontal reducer-input shaft marker, meeting a perpendicular output relationship. No verified gear contact or reduction ratio.

Fan 1 input bevel marker

Annular marker identifying the input-gear region. Teeth and gear contact are omitted; no transmission ratio or power result.

Fan 1 output bevel marker

Annular marker identifying the vertical output-gear region. No meshing tooth geometry, contact or torque result.

Fan 1 motor shaft

Separate motor-output shaft marker connecting toward the coupling. No electrical or speed data.

Fan 1 motor housing

Hollow original motor enclosure; no windings, supply, cooling or nameplate qualification.

Fan 1 motor end ring 1

Separate annular motor end-ring marker around the shaft. No bearing seal or electrical enclosure approval.

Fan 1 motor end ring 2

Separate annular motor end-ring marker around the shaft. No bearing seal or electrical enclosure approval.

Fan 1 motor cooling fin 1

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 2

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 3

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 4

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 5

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 6

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 7

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 8

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 9

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 10

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 11

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor cooling fin 12

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 1 motor foot -1.16

Separate mounting-foot marker. No alignment procedure or qualified fastening.

Fan 1 motor foot -0.91

Separate mounting-foot marker. No alignment procedure or qualified fastening.

Fan 1 coupling motor half

Separate coupling-region marker around the shaft. No compatibility, elastic material model, alignment or torque.

Fan 1 coupling elastic marker

Separate coupling-region marker around the shaft. No compatibility, elastic material model, alignment or torque.

Fan 1 coupling reducer half

Separate coupling-region marker around the shaft. No compatibility, elastic material model, alignment or torque.

Fan 1 coupling guard

Hollow visual guard marker around the coupling. It is not qualified guarding or permission to work on equipment.

Fan 2 ring

Separate hollow fan-ring marker. Blade envelope is geometrically inside it; no operating tip clearance or fan curve.

Fan 2 hub

Solid hub marker with eight independent blade roots. No adjustable pitch, balance or qualified retention.

Fan 2 blade 1

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 1

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 2

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 2

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 3

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 3

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 4

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 4

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 5

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 5

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 6

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 6

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 7

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 7

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 blade 8

Original tapered twisted blade marker. Invented profile and pitch; no airfoil data, airflow, efficiency, noise or fatigue result.

Fan 2 root fastener 8

Separate smooth blade-root retention marker. No bolt load or rated assembly.

Fan 2 vertical drive shaft

Separate vertical shaft between reducer marker and fan hub. No torsion, running fit or qualified coupling.

Fan 2 bearing outer 1.32

Static bearing outer-ring marker. No load rating or fit.

Fan 2 bearing inner 1.32

Static bearing inner-ring marker. No qualified running clearance.

Fan 2 bearing element 1.32 / 1

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 2

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 3

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 4

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 5

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 6

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 7

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.32 / 8

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing outer 1.68

Static bearing outer-ring marker. No load rating or fit.

Fan 2 bearing inner 1.68

Static bearing inner-ring marker. No qualified running clearance.

Fan 2 bearing element 1.68 / 1

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 2

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 3

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 4

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 5

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 6

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 7

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 bearing element 1.68 / 8

Separate static rolling-element marker. No cage, rolling kinematics or lubrication model.

Fan 2 reducer enclosure

Separate solid reducer-enclosure teaching cover; reveal exposes perpendicular shaft markers. No rated gear train or lubrication system.

Fan 2 horizontal input shaft

Separate horizontal reducer-input shaft marker, meeting a perpendicular output relationship. No verified gear contact or reduction ratio.

Fan 2 input bevel marker

Annular marker identifying the input-gear region. Teeth and gear contact are omitted; no transmission ratio or power result.

Fan 2 output bevel marker

Annular marker identifying the vertical output-gear region. No meshing tooth geometry, contact or torque result.

Fan 2 motor shaft

Separate motor-output shaft marker connecting toward the coupling. No electrical or speed data.

Fan 2 motor housing

Hollow original motor enclosure; no windings, supply, cooling or nameplate qualification.

Fan 2 motor end ring 1

Separate annular motor end-ring marker around the shaft. No bearing seal or electrical enclosure approval.

Fan 2 motor end ring 2

Separate annular motor end-ring marker around the shaft. No bearing seal or electrical enclosure approval.

Fan 2 motor cooling fin 1

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 2

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 3

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 4

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 5

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 6

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 7

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 8

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 9

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 10

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 11

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor cooling fin 12

Separate external cooling-fin marker. No motor heat or electrical simulation.

Fan 2 motor foot -1.16

Separate mounting-foot marker. No alignment procedure or qualified fastening.

Fan 2 motor foot -0.91

Separate mounting-foot marker. No alignment procedure or qualified fastening.

Fan 2 coupling motor half

Separate coupling-region marker around the shaft. No compatibility, elastic material model, alignment or torque.

Fan 2 coupling elastic marker

Separate coupling-region marker around the shaft. No compatibility, elastic material model, alignment or torque.

Fan 2 coupling reducer half

Separate coupling-region marker around the shaft. No compatibility, elastic material model, alignment or torque.

Fan 2 coupling guard

Hollow visual guard marker around the coupling. It is not qualified guarding or permission to work on equipment.

Compare the heat-transfer surroundings.

Plate-and-frame exchanger concept ↗Shell & tube exchanger ↗

Compare an enclosing shell and tube bundle, corrugated plates and gasket boundaries, or external fins and fans. These independent original concepts do not specify matched duties, interchangeability, a plant installation or calculated thermal performance.

Follow the connected teaching scene.

Trace separation, both compressor ends and aftercooling ↗

The scene reuses these original generic concepts with invented placement and relationships. It establishes no matched equipment duty, surveyed facility or complete gas-handling system.