Corrugated Finned Tubes Manufacturer in India
The main difference between ordinary finned tubes and corrugated finned tubes is that the latter type has spiral or transverse fins that have been made by rolling them into the base tube wall instead of attaching them with an external mechanism. This means that more thermal surface is available because of the turbulent flow of the fluid inside the tube, which increases heat transfer properties as well as allows minimizing fouling of the system. These tubes are made of carbon and alloy steels, as well as of Stainless Steel (304 for applications in a standard environment and 316 for applications in high-chloride seawater conditions), copper, and cupro-nickel, and have yield strengths of 205-450 MPa and can withstand temperatures up to 450 degrees Celsius. They are produced from materials that can handle up to 20 MPa of pressure and are usually operated at less than 6.4 MPa, and are applied for HVAC chillers, oil refining, distilleries, wastewater treatment, and food processing stations. The tubes of corrugated finned type supplied by Amardeep Steel Centre are certified and prepared for efficient use in practical applications.
What Is a Corrugated Finned Tube?
The word 'corrugated' gets used loosely across the fin tube industry, and it genuinely means different things depending on which supplier you are talking to, so it is worth being clear about what this page covers before going any further. A corrugated finned tube, as covered here, has helical ridges and channels rolled directly into the tube wall itself during manufacture. The tube is sometimes finished with a separate outer fin on top of that corrugated surface and sometimes supplied with the corrugated wall alone doing the work.
That is different from two other constructions that also get called 'corrugated' in casual conversation. Where a fin strip is wound onto a plain tube, and the foot of that strip is crimped or corrugated as it winds on, that is crimped fin construction, and our crimped finned tubes page covers that specifically. Where the edge of a wound fin is notched or serrated rather than the tube wall being corrugated, that is a different construction, again, covered on our helical serrated finned tubes page. If either of those sounds closer to what you actually need, those pages carry the full specification for that construction.
Technical Data
Corrugated Finned Tube Specification
| Specification | Detail |
|---|---|
Base tube material | Carbon steel, alloy steel, stainless steel |
Applicable standards | ASTM A179, ASTM A192, ASTM A210 for carbon steel, ASTM A213 / A269 for alloy and stainless steel |
Base tube outer diameter | 12.70 mm to 38.10 mm |
Wall thickness | 1.20 mm to 3.00 mm |
Corrugation pitch | 6 mm to 12 mm |
Corrugation depth | 0.8 mm to 2.0 mm |
Fin option | Corrugated wall alone, or corrugated wall finished with a separate outer fin on request |
Standard length | Up to 6 metres, custom lengths on request |
End finish | Plain end or bevelled end |
Chemical Composition of Corrugated Fin Tube Base Materials
| Material | Carbon (C) max | Manganese (Mn) max | Silicon (Si) max | Chromium (Cr) | Nickel (Ni) |
|---|---|---|---|---|---|
Carbon steel (ASTM A179) | 0.06 to 0.18 | 0.27 to 0.63 | 0.25 | Not applicable | Not applicable |
Alloy steel T11 | 0.05 to 0.15 | 0.30 to 0.60 | 0.50 to 1.00 | 1.00 to 1.50 | Not applicable |
Alloy steel T22 | 0.05 to 0.15 | 0.30 to 0.60 | 0.50 | 1.90 to 2.60 | Not applicable |
Stainless steel 304 | 0.08 | 2.00 | 0.75 | 18.0 to 20.0 | 8.0 to 10.5 |
Stainless steel 316 | 0.08 | 2.00 | 0.75 | 16.0 to 18.0 | 10.0 to 14.0 |
Mechanical Properties of Corrugated Tube Fins Base Materials
| Material | Tensile Strength (MPa) minimum | Yield Strength (MPa) minimum | Elongation (%) minimum |
|---|---|---|---|
Carbon steel (ASTM A179) | 325 | 180 | 35 |
Alloy steel T11 | 415 | 205 | 30 |
Alloy steel T22 | 415 | 205 | 30 |
Stainless steel 304 | 515 | 205 | 35 |
515 | 205 | 35 |
Corrugated Finned Tubing Dimension Chart
| Base Tube OD (mm) | Wall Thickness (mm) | Corrugation Pitch (mm) | Corrugation Depth (mm) |
|---|---|---|---|
12.70 | 1.20 | 6 | 0.8 |
15.88 | 1.50 | 7 | 1.0 |
19.05 | 1.65 | 8 | 1.2 |
25.40 | 2.00 | 10 | 1.5 |
31.75 | 2.50 | 11 | 1.8 |
38.10 | 3.00 | 12 | 2.0 |
Corrugation pitch and depth outside this table can be produced to match a specific heat exchanger design, and the exact combination should be confirmed against the base tube size and the duty before an order is placed.
Working Pressure of Corrugated Finned Tubes
| Base Tube OD (mm) | Wall Thickness (mm) | Indicative Working Pressure (bar) |
|---|---|---|
12.70 | 1.20 | 130 |
19.05 | 1.65 | 140 |
25.40 | 2.00 | 130 |
31.75 | 2.50 | 125 |
38.10 | 3.00 | 120 |
Applications and Industries for Corrugated Fin Tubes
- Chillers and heat pumps
- Compressor cooling coils
- HVAC and air conditioning systems
- Water boxes and shell and tube exchangers
- General process heat exchangers
- Dairy and beverage processing equipment
Frequently Asked Questions About Corrugated Finned Tubes
What is a corrugated finned tube?
It is a tube with helical ridges and channels rolled directly into the tube wall, increasing surface area and creating turbulence inside the tube at the same time. It can be supplied with the corrugated wall alone or finished with a separate outer fin depending on the duty.
Is a corrugated finned tube the same as a crimped finned tube?
No, though the terms are often used loosely and interchangeably in the market. A crimped finned tube has a separate fin strip wound onto a plain tube, with the foot of that strip crimped as it winds on. A corrugated finned tube has the corrugation rolled into the base tube wall itself, not into a separate fin. See our crimped finned tubes page if that is the construction you actually need.
How does tube wall corrugation improve heat transfer?
The helical ridges increase the surface area in contact with the fluid, and because they run in a continuous spiral, they also force the fluid to keep swirling and mixing rather than settling into a slow boundary layer against the wall. Improving both factors in the same feature is what gives this construction its heat transfer advantage over a plain tube.
What materials are corrugated finned tubes available in?
We supply corrugated finned tubes in carbon steel to ASTM A179, alloy steel grades T11 and T22, and stainless steel grades 304 and 316, depending on the temperature, pressure and corrosion resistance the duty calls for.
Which industries use corrugated finned tubes?
Chillers and heat pumps, compressor cooling coils, water boxes and shell and tube exchangers, HVAC and air conditioning systems, and general process heat exchangers all commonly use corrugated finned tube wherever compact size and improved heat transfer both matter.
What standards govern corrugated finned tube manufacturing?
ASTM A179, A192 and A210 cover carbon steel base tube, and ASTM A213 or A269 cover alloy steel and stainless steel base tube, with the corrugation profile itself specified separately to match the heat exchanger design.
Get a Quote for Corrugated Fin Tubing
Request a quote with your target material specifications, outer diameter, wall thickness, and total quantity to receive a guaranteed same-working-day quotation and availability report.
Related Products
Crimped Finned Tubes, Helical Serrated Finned Tubes, Extruded Finned Tubes, Stainless Steel Finned Tubes, Carbon Steel Finned Tubes, Alloy Steel Finned Tubes, Copper Finned Tubes
