Alberta OilNEWS · MARKETS · INDUSTRY
Explore
← All equipment

PROCESS PLANTS / INTERACTIVE 3D

Fired process heater cutaway

Explore a 94-part original heater concept with four open burner throats, six radiant tubes, twelve convection tubes and an open exhaust stack.

Static preview of the fired process heater cutaway 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.

API identifies fired heaters, tubes, refractory, stacks and burners as general refinery-equipment subjects. Zeeco describes the broad distinction between a radiant firebox and upper convection heat recovery. This original static cutaway gives the outer enclosure, inner lining markers, four burner locations, six hollow radiant tubes with five separate return-bend shapes, twelve hollow convection tubes and a genuinely open roof-to-stack passage distinct selectable parts. The visible colour marks are stationary reading aids, not flames or gas paths. The radiant and convection tube examples do not form a qualified connected process circuit. No manufacturer unit, Alberta facility, firing arrangement, operating state or calculated heat transfer is depicted.

Model scope and limits

Original 94-part static teaching assembly with complete front/back/side firebox and upper enclosures, separate solid refractory-position envelopes, four hollow burner throats and fuel/air markers, six open radiant process tubes with five separate hollow bends, twelve independent open convection tubes, four roof segments around a real exhaust opening and a complete hollow stack. The studio still omits facing panels; the interactive model retains the complete enclosure and can reveal internals. Proportions and tube adjacency are invented; the process tubes are not a qualified connected coil. No fuel system, flame or combustion simulation, heat duty, tube-metal temperature, heat flux, process containment, draft, pressure loss, refractory material, emissions, burner-management system, safeguards, access/maintenance design, code compliance, operating procedure or engineering qualification is established.

Further reading: Zeeco, The Fundamentals of Fired Equipment: broad radiant, convection, burner and flue-gas vocabulary; no product geometry copied ↗

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

CHECK YOUR UNDERSTANDING

What can the open stack and separate tube regions establish?

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. Begin with the complete firebox boundary

    The interactive model retains the facing panel. Reveal internals hides it for reading; the panel is not a certified casing or access design.

  2. Separate refractory position from material

    This solid inner panel marks a lining location. It does not identify a refractory formulation, temperature limit, anchorage or service life.

  3. Find the first open burner throat

    The throat has an actual hollow passage. Fuel and air envelopes remain separate static shapes; no lighting, combustion or protective sequence is represented.

  4. Inspect a radiant process-tube wall

    One of six hollow vertical tube examples in the firebox. Its dimensions and placement are invented, and no process pressure or heat flux is calculated.

  5. Compare a return bend with a tube

    This independently selectable hollow bend is adjacent to two tube ends. Visible adjacency does not establish a welded, pressure-qualified continuous circuit.

  6. Follow the upper gas-side enclosure

    The complete facing upper panel remains in the GLB, while the poster opens it. Gas flow and heat recovery are not simulated.

  7. Compare a convection tube

    One of twelve hollow upper-tube examples. The bank illustrates where convection-side process tubes can be discussed without claiming a connected pass or thermal duty.

  8. Recognize a static baffle cue

    The partial baffle shape is a location marker. No gas trajectory, pressure drop or flame behaviour follows from it.

  9. Find the real roof opening

    Four separate roof segments leave a central opening under the stack. The picture does not determine draft or mechanical adequacy.

  10. Stop at the open stack exit

    The stack is hollow and open at its upper boundary. Stack height, emissions, atmospheric dispersion and permitting need independent site evidence.

Additional primary references:

ACCESSIBLE COMPONENT REFERENCE

Every part, in plain language.

Search all components ↗Model provenance ↗
Base frame

Illustrative support frame; foundations and structural design vary.

Complete radiant front enclosure panel

Complete front firebox boundary; removable visibility is for reading, not an inspection access design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete radiant back enclosure panel

Separate rear firebox wall; no thermal or structural specification. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete radiant left enclosure panel

Full side enclosure boundary with invented proportions. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete radiant right enclosure panel

Full side enclosure boundary with invented proportions. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant chamber floor

Floor region below the schematic burner locations. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Rear refractory reading panel

Solid visual lining envelope, not an actual refractory composition or service result. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Front refractory reading panel

Separate visual lining envelope; hidden with the facing wall for component reading. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Left refractory reading panel

Inner lining location only; no anchor, expansion, hot-face or material rating. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Right refractory reading panel

Inner lining location only; no anchor, expansion, hot-face or material rating. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 1 open throat

Hollow opening into the radiant chamber, not a selected burner. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 1 air-register envelope

Separate annular air-entry location with no air-flow, damper or safety claim. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 1 fuel-lance envelope

Open generic fuel-entry marker; no fuel system, nozzle or mixing design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 1 tile ring

Separate tile-position ring without refractory qualification. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 1 plenum marker

Illustrative external plenum location; no controls or purge system. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 2 open throat

Hollow opening into the radiant chamber, not a selected burner. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 2 air-register envelope

Separate annular air-entry location with no air-flow, damper or safety claim. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 2 fuel-lance envelope

Open generic fuel-entry marker; no fuel system, nozzle or mixing design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 2 tile ring

Separate tile-position ring without refractory qualification. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 2 plenum marker

Illustrative external plenum location; no controls or purge system. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 3 open throat

Hollow opening into the radiant chamber, not a selected burner. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 3 air-register envelope

Separate annular air-entry location with no air-flow, damper or safety claim. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 3 fuel-lance envelope

Open generic fuel-entry marker; no fuel system, nozzle or mixing design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 3 tile ring

Separate tile-position ring without refractory qualification. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 3 plenum marker

Illustrative external plenum location; no controls or purge system. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 4 open throat

Hollow opening into the radiant chamber, not a selected burner. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 4 air-register envelope

Separate annular air-entry location with no air-flow, damper or safety claim. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 4 fuel-lance envelope

Open generic fuel-entry marker; no fuel system, nozzle or mixing design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 4 tile ring

Separate tile-position ring without refractory qualification. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Burner 4 plenum marker

Illustrative external plenum location; no controls or purge system. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant process tube 1

One open-ended radiant-zone process-tube example; not a selected tube size or wall thickness. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 1 lower support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 1 upper support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant process tube 2

One open-ended radiant-zone process-tube example; not a selected tube size or wall thickness. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 2 lower support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 2 upper support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant process tube 3

One open-ended radiant-zone process-tube example; not a selected tube size or wall thickness. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 3 lower support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 3 upper support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant process tube 4

One open-ended radiant-zone process-tube example; not a selected tube size or wall thickness. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 4 lower support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 4 upper support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant process tube 5

One open-ended radiant-zone process-tube example; not a selected tube size or wall thickness. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 5 lower support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 5 upper support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant process tube 6

One open-ended radiant-zone process-tube example; not a selected tube size or wall thickness. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 6 lower support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant tube 6 upper support cue

Separate visible support position, not a thermal expansion or load design. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant return bend 1

Open hollow return-bend teaching segment; geometric adjacency does not qualify a weld or complete circuit. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant return bend 2

Open hollow return-bend teaching segment; geometric adjacency does not qualify a weld or complete circuit. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant return bend 3

Open hollow return-bend teaching segment; geometric adjacency does not qualify a weld or complete circuit. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant return bend 4

Open hollow return-bend teaching segment; geometric adjacency does not qualify a weld or complete circuit. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant return bend 5

Open hollow return-bend teaching segment; geometric adjacency does not qualify a weld or complete circuit. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant lower open terminal

Unconnected lower process boundary; upstream equipment is not selected. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Radiant upper open terminal

Unconnected upper process boundary; no downstream circuit is selected. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete convection front enclosure panel

Separate upper gas-side enclosure; no engineered heat recovery or leakage value. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete convection back enclosure panel

Separate upper gas-side enclosure; no engineered heat recovery or leakage value. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete convection left enclosure panel

Separate upper gas-side enclosure; no engineered heat recovery or leakage value. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete convection right enclosure panel

Separate upper gas-side enclosure; no engineered heat recovery or leakage value. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 1 position 1

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 1 position 2

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 1 position 3

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 1 position 4

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 2 position 1

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 2 position 2

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 2 position 3

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 2 position 4

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 3 position 1

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 3 position 2

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 3 position 3

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube row 3 position 4

One full hollow straight process-tube example, not a connected pass, fin design or selected duty. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube support rail 1

Support-position marker beside the tube bank; no load or expansion analysis. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection tube support rail 2

Support-position marker beside the tube bank; no load or expansion analysis. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection gas baffle cue 1

Static partial baffle marker; no gas trajectory or pressure-drop result. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection gas baffle cue 2

Static partial baffle marker; no gas trajectory or pressure-drop result. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection roof front frame

Roof frame beside an actual open exhaust passage. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection roof back frame

Roof frame beside an actual open exhaust passage. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection roof left frame

Roof framing outside the central opening. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Convection roof right frame

Roof framing outside the central opening. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Complete open exhaust stack

Full hollow stack wall; height, draft and discharge performance are not determined. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Stack lower open collar

Separate unrated lower stack collar. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Stack upper open lip

Separate open stack exit boundary. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Stack external stiffening band 1

External visual band, not a structural calculation. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Stack external stiffening band 2

External visual band, not a structural calculation. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Stack external stiffening band 3

External visual band, not a structural calculation. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Closed front inspection-cover concept

Closed visual inspection-cover location; no opening procedure. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Heater display support 1

Invented display support, not a foundation or fireproofing detail. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Heater display support 3

Invented display support, not a foundation or fireproofing detail. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Heater display support 2

Invented display support, not a foundation or fireproofing detail. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Heater display support 4

Invented display support, not a foundation or fireproofing detail. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Static radiant-gas reading cue 1

Stationary colour marker, not a flame, gas streamline or measured temperature. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Static radiant-gas reading cue 2

Stationary colour marker, not a flame, gas streamline or measured temperature. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Static radiant-gas reading cue 3

Stationary colour marker, not a flame, gas streamline or measured temperature. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.

Static radiant-gas reading cue 4

Stationary colour marker, not a flame, gas streamline or measured temperature. Invented static educational shape: no heat duty, tube metal temperature, combustion, draft, emissions, refractory rating, pressure boundary, controls, burner-management system, code conformity or safe procedure.