Integrally finned copper tube
For specified heat-exchanger designs, integral fins are formed from the tube material rather than attached separately.
Review fin geometry →Product overview
How fins support heat transfer
For example, S.K. Metal reviews enquiries for condensers, evaporators and chillers against the specified thermal and mechanical design.
Compared with a plain tube of similar length, fins increase external area. Consequently, a designer can pursue the required heat-transfer duty within a specified exchanger arrangement. However, performance also depends on fluid properties, airflow, fin spacing and operating conditions. Therefore, provide the approved drawing rather than selecting solely by tube diameter.
See the enquiry checklist
Types and configurations
Finned Tube types and configurations
First, confirm the exchanger drawing and operating duty. After that, identify the tube alloy, fin profile, fin density and plain-end requirements.
Straight finned tube
In addition, straight lengths can be ordered to match the exchanger layout, subject to available dimensions.
Discuss length options →Plain-end finned tube
Where joints need an un-finned area, specify the required plain length at each end.
Provide end lengths →Intermediate plain lands
Moreover, a drawing may call for skipped fin sections to clear baffles or supports.
Review landing positions →Alternative tube alloys
For certain duties, cupro-nickel or other alloys may be specified instead of copper; confirm availability.
Review material needs →Project-specific designs
Finally, repeat orders can follow an approved fin drawing, tube standard and inspection plan.
Send your tube drawing →Specification guide
How to specify a Finned Tube
As a result, a complete drawing helps prevent errors in base tube dimensions, fin geometry and exchanger fit.
- Base tube
- First, provide outside diameter, wall thickness, tolerances and tube standard.
- Material
- Next, identify copper grade or the approved alternative alloy.
- Fin density
- Also state fins per inch or fin pitch from the approved drawing.
- Fin geometry
- Moreover, provide fin height, profile, root diameter and any tolerances.
- Length & lands
- In addition, specify total length, plain ends and intermediate un-finned sections.
- Service & testing
- Finally, state the heat-transfer duty, design pressure and inspection requirements.
- Quantity & delivery
- Include total quantity, protective packaging, delivery city and required date.
Important: Do not select a finned tube by base OD alone. Instead, obtain approval for fin pitch, height, material, plain lands, operating duty and exchanger geometry.
Applications
Heat exchanger applications
Because thermal duties differ, each tube and exchanger design must be matched to the operating conditions.
Condensers
For example, fins can provide additional surface area in a specified condenser layout.
Evaporators
Moreover, the fin profile and pitch are selected for the evaporation duty.
Chillers
In addition, integrally finned tubes may be specified for particular chiller heat exchangers.
Oil coolers
Where the cooler design calls for fins, confirm fluid and pressure conditions.
Economizers
However, a replacement tube should match the approved exchanger drawing.
Industrial heat exchangers
Therefore, repeat purchases should follow an approved tube schedule and inspection plan.
Quality and documentation
Verify dimensions and condition
Before ordering, confirm base tube dimensions, alloy, fin profile, fin pitch and plain-end lengths. For general copper tube and joining guidance, buyers can also review the Copper Tube Handbook.
Discuss your material requirement →- Base tube OD and wall verification
- Fin density, height and profile checks
- Plain-end lengths and surface-condition review
- Material and inspection documents when quoted
- Protective packaging and size identification
Ordering checklist
How to order a Finned Tube
For an accurate quotation, first send the tube drawing, material, fin dimensions, length, quantity and delivery details.
Identify the heat-transfer duty
First, state the equipment type, working fluids and operating conditions.
Send the tube drawing
Next, provide base tube OD, wall, alloy and overall length.
List fin geometry
Then identify fin density, height, profile and tolerances.
Confirm plain sections
In addition, state plain-end and intermediate landing positions.
Confirm delivery
Finally, include quantity, destination, schedule and requested documents.
Frequently asked questions
Selection FAQs
What is a Finned Tube?
In simple terms, it is a tube with fins that increase available external surface area. As a result, it can support a specified heat-transfer design.
What does fin density mean?
Fin density describes the number of fins over a given length, often expressed as fins per inch. However, the required density must follow the approved exchanger drawing.
Are plain ends available?
Yes, the existing S.K. Metal range describes straight tubes with plain ends. Therefore, specify the required plain length on each side when requesting a quote.
What are intermediate landings?
They are un-finned sections placed along a tube, for example where exchanger baffles or supports require clearance.
Which details are required for a quotation?
For a useful quote, provide base tube OD, wall, material, fin pitch, fin height, total length, plain sections and quantity.
Can inspection documents be requested?
Yes, subject to availability by order. In addition, list material, dimensional and traceability documents when requesting a quote.
Request a quotation
Send your heat-exchanger tube drawing
To begin, include material, base OD, wall, fin density, fin height, plain-end length, total length, quantity and delivery location. Afterward, S.K. Metal will review the enquiry.
Send your requirement