Helical Solid Finned Tubes Manufacturer and Supplier in India
Helical Solid Finned Tubes, which are produced by helically wrapping a continuous strip of solid fin material around the base tube and continuously welding them to the base tube along the root of the spiral, are often created by high-frequency resistance welding or the gas metal arc welding process (GMAW). As the fin strip is wound it is held under tension and constrained laterally thereby maintaining strong engagement with the tube and resulting in a strong, full penetration metallurgical bond with essentially no change to the grain structure of the base tube, even in 3% to 9% chromium alloy tubes. Solid
fin tubes are well suited for high temperature, high pressure service, and are not segmented like a series of fin tubes; this eliminates fouling that would occur in a serrated or perforated fin, and is also ideal for fibrous or sticky fluids. Amardeep Steel is a reputed Helical Solid Finned Tubes manufacturer and supplier in India, who manufacture precision tubes in materials like carbon steel, alloy steel, stainless steel and copper base and customizes their fin height, thickness and pitch as per the design duty assigned to boiler Economizers, Waste Heat Recovery Unit, Air Cooled Heat Exchanger and Process Heaters.
Technical Data
Specifications of Helical Solid Finned Tubes
| Parameter | Specification |
|---|---|
| Tube Material | Carbon Steel, Stainless Steel, Alloy Steel |
| Fin Material | Carbon Steel, SS, Aluminium |
| Tube OD | 19 mm to 219 mm |
| Fin Height | 5 mm to 25 mm |
| Fin Thickness | 0.8 mm to 3 mm |
| Fin Pitch | 3 mm to 12 mm |
| Fin Type | Serrated / Solid |
| Manufacturing Method | HFW (High Frequency Welding) |
Chemical Composition of Helical Solid Finned Tubes
| Material Grade | C (%) | Mn (%) | P (max %) | S (max %) | Si (%) | Cr (%) | Ni (%) | Mo (%) |
|---|---|---|---|---|---|---|---|---|
| ASTM A179 / A106 Gr. B (Carbon Steel) | 0.06 – 0.18 | 0.27 – 0.63 | 0.035 | 0.035 | 0.10 min | — | — | — |
| ASTM A213 T11 (1.25Cr-0.5Mo Alloy Steel) | 0.05 – 0.15 | 0.30 – 0.60 | 0.025 | 0.025 | 0.50 – 1.00 | 1.00 – 1.50 | — | 0.44 – 0.65 |
| ASTM A213 T22 (2.25Cr-1Mo Alloy Steel) | 0.05 – 0.15 | 0.30 – 0.60 | 0.025 | 0.025 | 0.50 max | 1.90 – 2.60 | — | 0.87 – 1.13 |
| ASTM A213 / A312 TP304 (Stainless Steel) | 0.08 max | 2.00 max | 0.045 | 0.030 | 0.75 max | 18.0 – 20.0 | 8.0 – 11.0 | — |
| ASTM A213 / A312 TP316L (Stainless Steel) | 0.03 max | 2.00 max | 0.045 | 0.030 | 0.75 max | 16.0 – 18.0 | 10.0 – 14.0 | 2.0 – 3.0 |
Helical Solid Finned Tubes Mechanical Properties
| Material Grade | Tensile Strength (MPa) | Yield Strength (MPa min) | Elongation (% min) | Hardness (max) |
|---|---|---|---|---|
| ASTM A179 (Seamless CS) | 325 min | 180 | 35 | 72 HRB |
| ASTM A106 Gr. B | 415 min | 240 | 30 | 79 HRB |
| ASTM A213 T11 | 415 min | 205 | 30 | 163 HBW |
| ASTM A213 T22 | 415 min | 205 | 30 | 163 HBW |
| ASTM A213 TP304 | 515 min | 205 | 35 | 90 HRB |
| ASTM A213 TP316L | 485 min | 170 | 35 | 90 HRB |
Equivalent Grades of Helical Solid Finned Tubes
| Material Class | ASTM / AISI Standard | EN / DIN Equivalent | JIS Equivalent | BS Equivalent |
|---|---|---|---|---|
| Carbon Steel | ASTM A179 / A106 Gr. B | EN 10216-2 P235GH / DIN 17175 St35.8 | JIS G3461 STB340 | BS 3602 Part 1 360 |
| Alloy Steel (1.25Cr-0.5Mo) | ASTM A213 T11 | EN 10216-2 13CrMo4-5 / DIN 17175 13CrMo44 | JIS G3462 STBA23 | BS 3606 620 |
| Alloy Steel (2.25Cr-1Mo) | ASTM A213 T22 | EN 10216-2 10CrMo9-10 / DIN 17175 10CrMo910 | JIS G3462 STBA24 | BS 3606 622 |
| Stainless Steel 304 | ASTM A213 / A312 TP304 | EN 10216-5 1.4301 / X5CrNi18-10 | JIS G3459 SUS304 | BS 3605 304S11 |
| Stainless Steel 316L | ASTM A213 / A312 TP316L | EN 10216-5 1.4404 / X2CrNiMo17-12-2 | JIS G3459 SUS316L | BS 3605 316S11 |
Applications and Industrial Uses of Helical Solid Finned Tubes
- Air Coolers
- Shell and Tube Heat Exchangers
- Waste Heat Recovery Systems
- Boilers
- Economizers
- Power Generation Plants
- Petrochemical and Refinery Plants
- Chemical Processing Industry
Frequently Asked Questions
1. What are Helical Solid Finned Tubes?
Helical Solid Finned Tubes are heat exchanger tubes with continuous solid fins helically welded around the base tube to improve heat transfer efficiency.
2. What are Helical Solid Finned Tubes used for?
They are used in boilers, economizers, air coolers, heat exchangers, waste heat recovery systems, and power plants.
3. What materials are used to manufacture Helical Solid Finned Tubes?
They are commonly manufactured using carbon steel, stainless steel, alloy steel, copper, and other special alloy base tubes with solid steel or alloy fins.
4. What is the lifespan of Helical Solid Finned Tubes?
With proper maintenance and operating conditions, Helical Solid Finned Tubes can provide a long service life of 15 years or more.
5. Can Helical Solid Finned Tubes be used in boilers and economizers?
Yes. They are widely used in boilers and economizers because of their excellent heat transfer performance and durability in high-temperature applications.
