Helical Serrated Finned Tubes Manufacturer and Supplier in India
Helical Serrated Finned Tubes are created by a high frequency resistance welding process, which welds the metal fins to the base tube in a continuous process, providing added surface area for heat transfer in an application where it is needed. The serrated fin profile provides better air flow, less boundary layer resistance and less fouling than conventional solid fin tubes, which translates to greater thermal efficiency. They are suited for high temperature/high pressure applications and can be used in boiler
systems, economizers, waste heat recovery systems, air coolers and petrochemical systems. Amardeep Steel is one of the best Helical Serrated Finned Tubes manufacturers and suppliers in India, providing precision engineered tubes and customized dimension and grade as per international quality standards.
Technical Data
Specifications of Helical Serrated Finned Tubes
| Component | Parameter | Metric Value / Range | Imperial Value / Details |
|---|---|---|---|
| Performance & Features | Key Advantages | • High heat transfer efficiency • Effective fin-to-tube bond across all temperatures & pressures • Superior resistance to fin fouling compared to solid fins • High temperature side resistance |
|
| Base Tube Details | Tube Outer Diameter (OD) | 15.88 mm to 219 mm | 0.625″ to 8.622″ |
| Base Tube Details | Tube Thickness | 1.651 mm to 16 mm | 0.065″ to 0.630″ |
| Base Tube Details | Tube Material Options | Carbon Steel (Seamless), Stainless Steel, Carbon Alloy Steel, Corten Steel, Duplex Stainless Steel, Super Duplex Stainless Steel (S32750), Inconel Alloy, High Chrome High Nickel Incoloy Alloy, CK 20, and custom alloys | |
| Fin Details | Fin Thickness | 0.8 mm to 4 mm | 0.031″ to 0.157″ |
| Fin Details | Fin Height | 6.35 mm to 38 mm | 0.25″ to 1.50″ |
| Fin Details | Fin Density / Pitch | 43 to 287 fins per meter | \approx 1.1 to 7.3 FPI (Fins Per Inch) |
| Fin Details | Fin Material Options | Carbon Steel, Stainless Steel, Alloy Steel, Corten Steel, Duplex Steel, Incoloy Alloy |
Chemical compositions of Helical Serrated Finned Tubes
| Grade (Spec) | C | Mn | Si | P | S | Cr | Ni | Mo | N | Fe / Other |
|---|---|---|---|---|---|---|---|---|---|---|
| Carbon Steel A106 Gr B | 0.30 max | 0.29–1.06 | 0.10 min | 0.035 max | 0.035 max | 0.40 max | 0.40 max | 0.15 max | — | Balance |
| Alloy Steel T11 (A213) | 0.05–0.15 | 0.30–0.60 | 0.50–1.00 | 0.025 max | 0.025 max | 1.00–1.50 | — | 0.44–0.65 | — | Balance |
| Alloy Steel T22 (A213) | 0.05–0.15 | 0.30–0.60 | 0.50 max | 0.025 max | 0.025 max | 1.90–2.60 | — | 0.87–1.13 | — | Balance |
| Stainless Steel TP304 (A213) | 0.08 max | 2.00 max | 0.75 max | 0.045 max | 0.03 max | 18.0–20.0 | 8.0–10.5 | — | — | Balance |
| Stainless Steel TP316 (A213) | 0.08 max | 2.00 max | 0.75 max | 0.045 max | 0.03 max | 16.0–18.0 | 10.0–14.0 | 2.00–3.00 | — | Balance |
| Duplex 2205, S31803/S32205 (A789) | 0.03 max | 2.00 max | 1.00 max | 0.03 max | 0.02 max | 21.0–23.0 | 4.5–6.5 | 2.5–3.5 | 0.08–0.20 | Balance |
| Super Duplex 2507, S32750 (A789) | 0.03 max | 1.20 max | 0.80 max | 0.035 max | 0.02 max | 24.0–26.0 | 6.0–8.0 | 3.0–4.5 | 0.24–0.32 | Balance |
| Inconel 600, N06600 (B167) | 0.15 max | 1.00 max | 0.50 max | — | 0.015 max | 14.0–17.0 | 72.0 min | — | — | Fe 6.0–10.0 |
| Incoloy 800, N08800 (B407) | 0.10 max | 1.50 max | 1.00 max | — | 0.015 max | 19.0–23.0 | 30.0–35.0 | — | — | Fe 39.5 min; Al+Ti 0.30–1.20 |
Mechanical Properties of Helical Serrated Finned Tubes
| Grade (Spec) | Tensile Strength (MPa min) | Yield Strength (MPa min) | Elongation (% min) | Typical Hardness |
|---|---|---|---|---|
| Carbon Steel A106 Gr B | 415 | 240 | 30 | \le 179\text{ HB} |
| Alloy Steel T11 (A213) | 415 | 205 | 30 | \le 163\text{ HBW (\le 85\text{ HRB}) |
| Alloy Steel T22 (A213) | 415 | 205 | 30 | \le 163\text{ HBW (\le 85\text{ HRB}) |
| Stainless Steel TP304 (A213) | 515 | 205 | 35 | \le 192\text{ HB} |
| Stainless Steel TP316 (A213) | 515 | 205 | 35 | \le 192\text{ HB} |
| Duplex 2205, S31803/S32205 (A789) | 620 | 450 | 25 | \le 290\text{ HB} |
| Super Duplex 2507, S32750 (A789) | 795 | 550 | 15 | \le 310\text{ HB} |
| Inconel 600, N06600 (B167) | 550 | 240 | 30 | \le 193\text{ HB} |
| Incoloy 800, N08800 (B407) | 520 | 205 | 30 | \le 179\text{ HB} |
Applications and Industrial Uses of Helical Serrated Finned Tubes
- Waste Heat Recovery Systems
- Boilers
- Economizers
- Air Coolers
- Heat Exchangers
- Petrochemical & Refinery Plants
- Power Generation Plants
- Chemical Processing Industry
Frequently Asked Questions
1. What are Helical Serrated Finned Tubes?
Helical Serrated Finned Tubes are heat exchanger tubes with serrated fins helically welded to the base tube to improve heat transfer and reduce fouling.
2. What are Helical Serrated Finned Tubes used for?
They are used in boilers, economizers, air coolers, heat exchangers, waste heat recovery systems, and power plants.
3. What are the advantages of Helical Serrated Finned Tubes?
They offer higher heat transfer efficiency, reduced fouling, excellent mechanical strength, and reliable performance in high-temperature applications.
4. How do serrated fins improve heat transfer efficiency?
The serrated fin design creates greater air turbulence, improving airflow and increasing the rate of heat transfer while reducing dirt buildup.
5. What is the maximum operating temperature of Helical Serrated Finned Tubes?
Helical Serrated Finned Tubes are suitable for high-temperature applications, with the maximum operating temperature depending on the base tube and fin material.
6. Are Helical Serrated Finned Tubes suitable for high-pressure applications?
Yes. They are widely used in high-pressure and high-temperature industrial systems because of their strong welded construction and durable performance.
