Helically Wound Anti-corrosive High Fin Tubes Manufacturer & Supplier in India
Helically wound high fin tubes are manufactured by mechanically winding a continuous fin strip around the base tube and securing it by embedding, controlled deformation, or crimping without a continuous weld seam at the fin-to-tube joint. This mechanically formed construction avoids the heat-affected zone associated with welded fins, making it a preferred choice for corrosive service where fin-to-tube joint integrity is critical. The fin construction can be G-Fin (embedded), L-Foot, LL-Foot, KL-Foot, or Crimped, depending on the operating temperature and duty. Amardeep Steel offers these fin tubes in corrosion-resistant materials including copper-nickel (90/10 and 70/30), admiralty brass, aluminium brass, titanium, duplex and super duplex stainless steel, and Monel,
paired with compatible base tube materials. These are typically used in marine and offshore heat exchangers, seawater-cooled condensers, coastal power plant equipment, and chemical process cooling where standard welded fin tubes are vulnerable to corrosion. Tube size, wall thickness, fin height, fin pitch, and fin/base material combination are selected based on the corrosive duty and thermal requirement. Amardeep Steel manufactures and supplies helically wound anti-corrosive high fin tubes and related tube products to customers across multiple countries.
Technical Data
Specifications of Helically Wound Anti-corrosive High Fin Tubes
| Attribute | Specification Details |
|---|---|
|
Applicable Standards |
ASTM B111, ASTM B359, ASTM B338, ASTM A789/A790, ASME SA213, ASME SA249 |
|
Base Tube Outside Diameter (OD) |
12.7 mm to 101.6 mm (1/2" to 4") |
|
Base Tube Wall Thickness |
1.24 mm to 7.11 mm (0.049" to 0.280") |
|
Fin Height |
3.0 mm to 19.0 mm (0.118" to 0.750") |
|
Fin Thickness |
0.4 mm to 1.5 mm (0.015" to 0.060") |
|
Fin Density (Pitch) |
60 to 275 fins per meter (1.5 to 7 fins per inch – FPI) |
|
Maximum Tube Length |
Up to 12 meters (39.4 ft) |
|
Fin Construction Types |
G-Fin (Embedded), L-Foot, LL-Foot, KL-Foot, Crimped |
|
Maximum Fin Operating Temperature |
G-Fin: up to 450°C · KL-Foot: up to 300°C · Crimped: up to 250°C · L-Foot: up to 150°C |
|
Fin Material Options |
Copper-Nickel (90/10, 70/30), Admiralty Brass, Aluminium Brass, Titanium, Duplex/Super Duplex, Stainless Steel (304/316), Monel |
|
Base Tube Material Options |
Copper-Nickel, Duplex/Super Duplex Stainless Steel, Titanium, Stainless Steel 304/316, Monel |
Chemical Compositions of Helically Wound Anti-corrosive High Fin Tubes
| Material Standard & Grade | UNS | C | Mn | Si | Cr | Ni | Mo | Other Elements |
|---|---|---|---|---|---|---|---|---|
|
Copper-Nickel 90/10 (ASTM B111 C70600) |
C70600 |
— |
1.00% max |
— |
— |
9.0–11.0% |
— |
Cu: Remainder · Fe: 1.0–1.8% |
|
Copper-Nickel 70/30 (ASTM B111 C71500) |
C71500 |
— |
1.00% max |
— |
— |
29.0–33.0% |
— |
Cu: Remainder · Fe: 0.40–1.00% |
|
Admiralty Brass (ASTM B111 C44300) |
C44300 |
— |
— |
— |
— |
— |
— |
Cu: 70.0–73.0% · Zn: Rem. · Sn: 0.9–1.2% · As: 0.02–0.06% |
|
Aluminium Brass (ASTM B111 C68700) |
C68700 |
— |
— |
— |
— |
— |
— |
Cu: 76.0–79.0% · Al: 1.8–2.5% · Zn: Rem. · As: 0.02–0.06% |
|
Stainless Steel 304 (ASME SA213/SA249) |
S30400 |
0.08% max |
2.00% max |
0.75% max |
18.0–20.0% |
8.0–10.5% |
— |
N: 0.10% max · P: 0.045% max · S: 0.030% max |
|
Stainless Steel 316 (ASME SA213/SA249) |
S31600 |
0.08% max |
2.00% max |
0.75% max |
16.0–18.0% |
10.0–14.0% |
2.00–3.00% |
N: 0.10% max · P: 0.045% max · S: 0.030% max |
|
Duplex SS 2205 (ASTM A789/A790) |
S31803 / S32205 |
0.030% max |
2.00% max |
1.00% max |
22.0–23.0% |
4.5–6.5% |
3.00–3.50% |
N: 0.14–0.20% |
|
Super Duplex SS 2507 (ASTM A789/A790) |
S32750 |
0.030% max |
1.20% max |
0.80% max |
24.0–26.0% |
6.0–8.0% |
3.00–5.00% |
N: 0.24–0.32% · Cu: 0.50% max |
|
Titanium Gr. 2 (ASTM B338) |
R50400 |
0.08% max |
— |
— |
— |
— |
— |
Fe ≤ 0.30% · O ≤ 0.25% · H ≤ 0.015% · N ≤ 0.03% |
|
Monel 400 (ASTM B163/B165) |
N04400 |
0.30% max |
2.00% max |
0.50% max |
— |
63.0% min |
— |
Cu: 28.0–34.0% · Fe: 2.50% max · S: 0.024% max |
Helically Wound Anti-corrosive High Fin Tubes Mechanical Properties
| Material Grade | Tensile Strength (Min) | Yield Strength 0.2% Proof (Min) | Elongation in 2"/50mm (Min) | Hardness (Max) |
|---|---|---|---|---|
|
Copper-Nickel 90/10 (C70600) |
275 MPa (40 ksi) |
105 MPa (15 ksi) |
30% |
75 HRB |
|
Copper-Nickel 70/30 (C71500) |
365 MPa (53 ksi) |
140 MPa (20 ksi) |
30% |
80 HRB |
|
Admiralty Brass (C44300) |
310 MPa (45 ksi) |
125 MPa (18 ksi) |
40% |
70 HRB |
|
Aluminium Brass (C68700) |
340 MPa (50 ksi) |
125 MPa (18 ksi) |
35% |
75 HRB |
|
Stainless Steel 304 (UNS S30400) |
515 MPa (75 ksi) |
205 MPa (30 ksi) |
35% |
90 HRB / 201 HV |
|
Stainless Steel 316 (UNS S31600) |
515 MPa (75 ksi) |
205 MPa (30 ksi) |
35% |
90 HRB / 201 HV |
|
Duplex 2205 (UNS S31803) |
620 MPa (90 ksi) |
450 MPa (65 ksi) |
25% |
31 HRC |
|
Super Duplex 2507 (UNS S32750) |
750 MPa (116 ksi) |
550 MPa (80 ksi) |
15% |
32 HRC |
|
Titanium Gr. 2 (UNS R50400) |
345 MPa (50 ksi) |
275 MPa (40 ksi) |
20% |
80 HRB |
|
Monel 400 (UNS N04400) |
550 MPa (80 ksi) |
240 MPa (35 ksi) |
35% |
90 HRB |
Equivalent Grades of Helically Wound Anti-corrosive High Fin Tubes
| Material Category | ASTM / ASME | EN / DIN Equivalent | BS Standard | JIS Standard | AFNOR |
|---|---|---|---|---|---|
|
Copper-Nickel 90/10 |
ASTM B111 / B359 |
EN 12451 (CuNi10Fe1Mn / CW352H) |
BS 2871 Pt 3 (CN102) |
JIS H3300 (C7060) |
NF A51-102 |
|
Copper-Nickel 70/30 |
ASTM B111 / B359 |
EN 12451 (CuNi30Mn1Fe / CW354H) |
BS 2871 Pt 3 (CN107) |
JIS H3300 (C7150) |
NF A51-104 |
|
Aluminium Brass |
ASTM B111 / B359 |
EN 12451 (CuZn20Al2As / CW702R) |
BS 2871 Pt 3 (CZ110) |
JIS H3300 (C6870) |
NF A51-103 |
|
Stainless Steel 304 |
ASME SA213 / SA249 |
EN 10216-5 (1.4301 / X5CrNi18-10) |
BS 3605 (304S31) |
JIS G3463 (SUS304TB) |
NF A49-217 |
|
Stainless Steel 316 |
ASME SA213 / SA249 |
EN 10216-5 (1.4401 / X5CrNiMo17-12-2) |
BS 3605 (316S31) |
JIS G3463 (SUS316TB) |
NF A49-217 |
|
Titanium Grade 2 |
ASTM B338 / B861 |
EN 12449 (3.7035) |
BS 7598 |
JIS H4630 (Class 2) |
NF L14-013 |
|
Duplex SS 2205 |
ASTM A789 / A790 |
EN 10216-5 (1.4462) |
BS 3605 |
JIS G3468 (SUS329J3L) |
NF A49-217 |
|
Super Duplex SS 2507 |
ASTM A789 / A790 |
EN 10216-5 (1.4410) |
BS 3605 |
JIS G3468 (SUS329J4L) |
NF A49-217 |
|
Monel 400 |
ASTM B163 / B165 |
EN 12449 (2.4360) |
BS 3072 (NA13) |
JIS H4551 (NCuP) |
NF A51-121 |
Different Types of Helically Wound Anti-corrosive High Fin Tubes
- G-Fin / Embedded Fin Tubes
- L-Foot Fin Tubes
- LL-Foot Fin Tubes
- KL-Foot Fin Tubes
- Crimped Fin Tubes
- Copper-Nickel Anti-Corrosive Fin Tubes
- Titanium Anti-Corrosive Fin Tubes
- Duplex Stainless Steel Anti-Corrosive Fin Tubes
- Monel Anti-Corrosive Fin Tubes
Applications and Industrial Uses of Helically Wound Anti-corrosive High Fin Tubes
- Marine and Offshore Heat Exchangers
- Seawater-Cooled Condensers
- Coastal and Offshore Power Plants
- Desalination Plants
- Chemical and Petrochemical Processing
- Oil and Gas Platform Equipment
- Shipboard Coolers and Condensers
- HVAC Systems in Humid and Corrosive Atmospheres
Frequently Asked Questions
What are Helically Wound Anti-Corrosive High Fin Tubes?
Helically wound anti-corrosive high fin tubes are fin tubes formed by mechanically winding and securing a fin strip around the base tube — using embedding, deformation, or crimping — in corrosion-resistant materials such as copper-nickel, titanium, duplex stainless steel, or Monel.
What is the difference between G-Fin, L-Foot, and Crimped fin construction?
G-Fin (embedded) fins are set into a machined groove for the highest operating temperature rating, L-Foot fins are mechanically deformed for contact pressure at moderate temperatures, and Crimped fins are wrapped under tension with a crimped foot, offering a mid-range temperature rating.
Why are helically wound fin tubes preferred for corrosive environments?
Because the fin is mechanically secured rather than welded, there is no continuous weld seam or heat-affected zone at the fin-to-tube joint, reducing the risk of localized corrosion at that interface.
What materials are used for anti-corrosive high fin tubes?
Common fin and base tube materials for corrosive service include copper-nickel (90/10 and 70/30), admiralty brass, titanium, duplex and super duplex stainless steel, and Monel.
What is the maximum operating temperature for helically wound fin tubes?
It depends on the fin construction: up to 450°C for G-Fin (embedded), up to 300°C for KL-Foot, up to 250°C for Crimped, and up to 150°C for L-Foot fins.
Are these fin tubes suitable for marine and offshore applications?
Yes, helically wound anti-corrosive high fin tubes in copper-nickel, titanium, and duplex stainless steel are widely used in marine, offshore, and seawater-cooled heat exchanger applications.
