Sheet 21/77Products / Steel and structural / Finned tubeRev
Steel and structural · catalogue item
Finned tube
Tube with external fins that increase heat transfer surface, used in air coolers and heaters.
In short
Tube with external fins that increase heat transfer surface, used in air coolers and heaters. JJ Projects sources it to the specification the buyer names. Typical reference, base tube: Per the ordered specification, such as ASTM A179 or A213.
Specification references
Typical references only. The governing specification is the one on your purchase order or datasheet.
| Property | Typical reference |
|---|---|
| Base tube | Per the ordered specification, such as ASTM A179 or A213 |
| Fin types | Extruded, embedded or wound, per the thermal design |
| Fin material | Aluminum or steel, per the process requirement |
| Data to give | Tube OD and wall, fin height, pitch and length |
Specification references describe what the order names, not a certification held by JJ Projects.
Steel and structural
Typical uses
- 01Air-cooled heat exchangers, often called fin-fan coolers
- 02Fired heater convection sections and economizers
- 03Waste heat recovery and process gas heaters
- 04Replacement bundles and tubes for existing air coolers
What to include in a request
A request with these details can be quoted without a round of questions. Send what you have and we will ask for the rest.
- 01Base tube outside diameter and wall thickness, minimum or average
- 02Base tube material and specification, for example ASTM A179 or A213
- 03Fin type: extruded, embedded or wound, as the thermal design requires
- 04Fin material, aluminum or steel, plus fin height and pitch in fins per inch or per meter
- 05Bare end lengths and overall tube length
- 06Quantity of tubes
- 07Testing and documents: base tube material test report and any examination of the finned tube required
Steel and structural
Related items
- 01Shell-and-tube heat exchangerShell-and-tube heat exchangers fabricated to your thermal datasheet to TEMA and ASME Section VIII, and what the request needs, by TEMA type and tubes.Learn more
- 02Seamless pipeSeamless carbon and stainless pipe by NPS and schedule, sourced to ASTM A106, A312 and API 5L, with the details a pipe request should carry.Learn more
- 03Horizontal separatorHorizontal gas, oil and water separators fabricated to your datasheet under ASME Section VIII, with B16.5 nozzles, and what the request needs.Learn more
Guides
Guides
- 01Material test reports (MTRs) and EN 10204What a material test report contains, how EN 10204 types 2.1, 2.2, 3.1 and 3.2 differ, what heat numbers mean, and what to check against the purchase order.Learn more
- 02How to write an RFQ for industrial materialsWhat an RFQ for industrial materials must specify: item, size, schedule or class, grade, standard, quantity, MTRs, inspection, packing and Incoterm.Learn more
Questions
Questions
01What are the common fin types?
Extruded fins are formed from an aluminum sleeve bonded over the base tube. Embedded fins are wound into a groove cut in the tube wall. Wound fins are strip wrapped around the tube, sometimes with a foot. The choice depends on the maximum tube wall temperature, the environment and the thermal design.
02What does the thermal designer need to give?
The base tube outside diameter and wall, fin height, fin pitch, fin material and tube length. Without them the heat transfer surface cannot be matched. Send the heat exchanger datasheet if you have it.
Send the specification. We will take it from there.
A material list, a drawing or a single line: tell us what the project needs and where it is going.