Elliptical Stud Fin Tubes Manufacturer and Exporter in India
Elliptical Stud Fin Tubes combine an elliptical base tube with short welded studs arranged in defined rows around the outside surface. This geometry brings together two useful characteristics: the elliptical profile offers lower air side resistance than a conventional round tube, while the welded studs provide a robust heat transfer surface that can withstand vibration and fouling conditions. This makes Elliptical Stud Fin Tubes particularly relevant to heat recovery and high-temperature equipment where flue gas may contain ash, soot or other deposits. Unlike a plain oval tube, the outside surface carries welded studs to increase the available heat transfer area. Unlike a conventional wound fin, the studded surface is designed for demanding service where mechanical durability and resistance to fouling are important. Amardeep Steel Centre has supplied and exported steel pipes, tubes and speciality heat-transfer products with its product range covering carbon steel, alloy steel and stainless steel materials for industrial applications.
Technical Data
Specifications of Elliptical Stud Fin Tubes
The construction of an elliptical stud fin tube is selected according to the base tube material, stud material, tube dimensions, stud height and required spacing.
Parameter | Specification |
|---|---|
Product | Elliptical Stud Fin Tubes |
Base Tube Shape | Elliptical / oval seamless tube |
Base Tube Materials | Carbon Steel A179, A192, A106 Gr B; Alloy Steel P5, P9, P11, P22; Stainless Steel TP304, TP316 |
Stud Materials | Carbon Steel, Stainless Steel and Alloy Steel, matched to base tube |
Pipe Diameter | Minimum 1 x tube OD to maximum 4 x tube OD |
Stud Height | 12.7 mm to 63.5 mm |
Stud Shape | Elliptical or oval; 12.7 mm common size; custom sizes on request |
Minimum Stud Spacing | 12.7 mm |
Stud Attachment | Electrical resistance stud welding |
Maximum Operating Temperature | Up to 550 degrees C for selected constructions, depending on base tube, stud grade, wall thickness and design requirements |
Documentation | Mill Test Certificate supplied with every order |
Chemical Composition of Elliptical Stud Fin Tubes
Chemical composition depends on the base tube grade selected for the application. The following grades are included within the specified Elliptical Stud Fin Tube range.
Grade | Carbon (C) | Manganese (Mn) | Chromium (Cr) | Molybdenum (Mo) | Nickel (Ni) |
|---|---|---|---|---|---|
Carbon Steel A179 | 0.06–0.18% | 0.27–0.63% | |||
Alloy Steel P11 / A213 T11 | 0.05–0.15% | 0.30–0.60% | 1.00–1.50% | 0.44–0.65% | |
Alloy Steel P22 / A213 T22 | 0.05–0.15% | 0.30–0.60% | 1.90–2.60% | 0.87–1.13% | |
Stainless Steel TP304 | 0.08% max | 2.00% max | 18.00–20.00% | 8.00–10.50% | |
Stainless Steel TP316 | 0.08% max | 2.00% max | 16.00–18.00% | 2.00–3.00% | 10.00–14.00% |
Elliptical Stud Fin Tubes Mechanical Properties
Mechanical properties vary according to the material grade used for the base tube. The specified minimum values are given below.
Grade | Tensile Strength, Min. | Yield Strength, Min. | Elongation, Min. |
|---|---|---|---|
Carbon Steel A179 | 325 MPa | 180 MPa | 35% |
Alloy Steel P11 | 415 MPa | 205 MPa | 30% |
Alloy Steel P22 | 415 MPa | 205 MPa | 30% |
Stainless Steel TP304 | 515 MPa | 205 MPa | 35% |
Stainless Steel TP316 | 515 MPa | 205 MPa | 35% |
Elliptical Stud Finned Tubes Dimension Chart
Stud height and spacing are selected in relation to the tube dimensions and the equipment layout. The following range provides a general dimensional guide.
Pipe Diameter Range | Stud Height | Stud Spacing |
|---|---|---|
1 × OD to 2 × OD | 12.7–25.4 mm | 12.7 mm minimum |
2 × OD to 3 × OD | 25.4–38.1 mm | 12.7–19.05 mm |
3 × OD to 4 × OB | 38.1–63.5 mm | 19.05–25.4 mm |
Note: Exact stud height and spacing are confirmed against the customer's drawing or boiler layout before production.
Applications of Elliptical Stud Fin Tubes
Elliptical Stud Fin Tubes are used in heat transfer equipment exposed to high-temperature, dirty or fouling gas streams, where compact geometry and durable stud construction are important.
- Petrochemical Furnaces: Suitable for high-temperature furnace service involving contaminated flue gas.
- Fluidised Bed Boilers: Used where ash-laden gas and vibration make fouling resistance important.
- Waste Heat Recovery Units: Suitable for recovering heat from hot exhaust or process gases in compact tube arrangements.
- Process Heaters: Used for demanding heat transfer service involving high-temperature flue gas.
- Marine Boiler Systems: Suitable for shipboard boiler service where compact, vibration resistant tube surfaces are needed.
- Incinerator Heat Recovery: Used to recover heat from incinerator flue gas, where ash and particulate loading make stud durability important.
Frequently Asked Questions
What is an Elliptical Stud Fin Tube?
An elliptical stud fin tube has an oval seamless base tube with welded elliptical studs arranged in rows for durable external heat transfer.
Why combine an elliptical tube shape with welded studs?
The elliptical profile can reduce air side pressure drop, while welded studs increase external heat transfer area and provide durability in fouling flue gas service.
How does an elliptical stud fin tube differ from a round stud tube?
An elliptical stud fin tube uses an oval base tube, while a round stud tube uses a circular base tube. Both use welded studs.
What is the maximum operating temperature for Elliptical Stud Fin Tubes?
Operating temperature can reach up to 550 degrees C for selected constructions, depending on the base tube, stud grade, wall thickness, and design requirements.
Which materials are available for Elliptical Stud Fin Tubes?
They are available in carbon steel, alloy steel, and stainless steel, with grades selected according to project requirements.
Related Finned Tube Products
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For enquiries, provide the required material grade, tube dimensions, wall thickness, stud dimensions, spacing, length, operating pressure and temperature.
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