Duplex & Super Duplex Steel Pipes and Tubes Supplier in India
Duplex and Super Duplex Steel Pipes & Tubes are advanced corrosion-resistant materials known for their exceptional mechanical strength and resistance to stress corrosion cracking. These pipes are designed with a two-phase microstructure consisting of both austenitic and ferritic stainless steel, offering a balanced combination of durability and corrosion resistance.
Duplex Steel Pipes, such as Duplex 2205, are composed of high chromium, moderate nickel, and molybdenum with added nitrogen to enhance performance in aggressive environments. They are suitable for use in chemical processing, oil and gas exploration, marine applications, and pollution control equipment.
Super Duplex Steel Pipes, including Super Duplex 2507, offer higher levels of chromium, nickel, and molybdenum to provide even greater strength and resistance to pitting, crevice corrosion, and chloride stress corrosion cracking. These pipes are ideal for offshore platforms, desalination plants, structural applications, and heat exchangers.
At Vardhman Steel Overseas, we offer a wide range of Duplex and Super Duplex Pipes & Tubes in various sizes, thicknesses, and finishes. Our products conform to international standards such as ASTM A790 and are available in both seamless and welded forms to meet specific industry needs.
Duplex & Super Duplex Steel Pipes & Tubes Specification
| Specifications | Details |
|---|---|
| Grades | Duplex 2205 Pipe, Super Duplex 2507 Pipe |
| ASTM / ASME Standards | ASTM A790 / ASME SA790 |
| Tube Type | ERW, EFW, Welded, Seamless, Fabricated |
| Pipe / Tube Form | Hollow, Rectangular, Hydraulic, Round, Square, Straight, U-bent, Coiled, LSAW, Boiler |
| Pipe / Tube Length | Single Random, Double Random, Cut Length |
| Pipe / Tube Schedule | SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, STD |
| EFW Pipe Size | 5.0 mm – 1219.2 mm |
| Welded Tube Size | 6.35 mm OD – 152 mm OD |
| Tubing Wall Thickness | 0.020″ – 0.220″ (special wall thicknesses available) |
| Swg & Bwg | 10 Swg, 12 Swg, 14 Swg, 16 Swg, 18 Swg, 20 Swg |
| Finish | Polished, Bright & Annealed (BA), Annealed & Pickled (AP), MF |
| End | Beveled End, Plain End, Threaded |
| Marking | Standard, Grade, OD, Thickness, Length, Heat No. (or as per customer’s request) |
| Material Test Certificates (MTC) | As per EN 10204 3.1 and EN 10204 3.2 |
| Applications | Gas Tube, Fluid Tube, Oil Tube, Boiler & Heat Exchanger, Marine, Offshore, Pressure Vessels |
Types of Pipes & Tubes
Explore our wide range of high-performance Pipes & Tubes manufactured in various grades and materials.
Seamless Pipes & Tubes
Seamless pipes offer superior strength and corrosion resistance, ideal for high-pressure and high-temperature applications.
Welded Pipes & Tubes
Cost-effective and durable, welded pipes are suitable for structural and low-pressure applications across various industries.
ERW Pipes & Tubes
ERW (Electric Resistance Welded) pipes are widely used for transportation of oil, gas, and water due to their precision and strength.
Electropolished Pipes
Electropolished pipes feature ultra-smooth surfaces for hygienic applications in the pharmaceutical, food, and biotech industries.
EFW Pipes
EFW (Electric Fusion Welded) pipes are preferred for large-diameter applications such as
offshore and structural pipelines.
Pipe Dimensions and Schedules
Pipes come in various sizes and schedules to accommodate the specific pressure requirements of the application. Below is a detailed table that outlines the dimensions for the most common pipe schedules:
Nominal Broe |
Outside Diameter |
Schedule 5S |
Schedule 10S |
Schedule 40S |
Schedule 80S |
Schedule 160S |
Schedule XXS |
|||||||
mm |
INCH |
mm |
Wt mm |
Weight (Kg/mt) |
Wt mm |
Weight (Kg/mt) |
Wt mm |
Weight (Kg/mt) |
Wt mm |
Weight (Kg/mt) |
Wt mm |
Weight (Kg/mt) |
Wt mm |
Weight (Kg/mt) |
3 |
1/8 |
10.3 |
1.24 |
0.276 |
1.24 |
028 |
1.73 |
0.37 |
2.41 |
0.47 |
- |
- |
- |
- |
6 |
1/4 |
13.7 |
1.24 |
0.390 |
1.65 |
049 |
2.24 |
0.631 |
3.02 |
.0.80 |
- |
- |
- |
- |
10 |
3/8 |
17.1 |
1.24 |
0.490 |
1.65 |
0.63 |
2.31 |
0.845 |
3.20 |
1.10 |
- |
- |
- |
- |
15 |
1/2 |
21.3 |
1.65 |
0.800 |
2.11 |
1.00 |
2.77 |
1.27 |
3.75 |
1.62 |
4.75 |
1.94 |
7.47 |
2.55 |
20 |
3/4 |
26.7 |
1.65 |
1.03 |
2.11 |
1.28 |
2.87 |
1.68 |
3.91 |
2.20 |
5.54 |
2.89 |
7.82 |
3.63 |
25 |
1 |
33.4 |
1.65 |
1.30 |
2.77 |
2.09 |
3.38 |
2.50 |
4.55 |
3.20 |
6.35 |
4.24 |
9.09 |
5.45 |
32 |
1.1/4 |
42.2 |
1.65 |
1.65 |
2.77 |
2.70 |
3.56 |
3.38 |
4.85 |
4.47 |
6.35 |
5.61 |
9.70 |
7.77 |
40 |
1.1/2 |
48.3 |
1.65 |
1.91 |
2.77 |
3.11 |
3.68 |
4.05 |
5.08 |
5.41 |
7.14 |
7.25 |
10.16 |
9.54 |
50 |
2 |
60.3 |
1.65 |
2.40 |
2.77 |
3.93 |
3.91 |
5.44 |
5.54 |
7.48 |
8.74 |
11.1 |
11.07 |
13.44 |
65 |
2.1/2 |
73.0 |
2.11 |
3.69 |
3.05 |
5.26 |
5.16 |
8.63 |
7.01 |
11.4 |
9.53 |
14.9 |
14.2 |
20.39 |
80 |
3 |
88.9 |
2.11 |
4.51 |
3.05 |
6.45 |
5.49 |
11.30 |
7.62 |
15.2 |
11.1 |
21.3 |
15.24 |
27.65 |
100 |
4 |
114.3 |
2.11 |
5.84 |
3.05 |
8.36 |
6.02 |
16.07 |
8.56 |
22.3 |
13.49 |
33.54 |
17.12 |
41.03 |
125 |
5 |
141.3 |
2.77 |
9.47 |
3.40 |
11.57 |
6.55 |
21.8 |
9.53 |
31.97 |
15.88 |
49.11 |
19.05 |
57.43 |
150 |
6 |
168.3 |
2.77 |
11.32 |
3.40 |
13.84 |
7.11 |
28.3 |
10.97 |
42.7 |
18.2 |
67.56 |
21.95 |
79.22 |
200 |
8 |
219.1 |
2.77 |
14.79 |
3.76 |
19.96 |
8.18 |
42.6 |
12.7 |
64.6 |
23.0 |
111.2 |
22.23 |
107.8 |
250 |
10 |
273.1 |
3.40 |
22.63 |
4.19 |
27.78 |
9.27 |
60.5 |
12.7 |
96.0 |
28.6 |
172.4 |
25.40 |
155.15 |
300 |
12 |
323.9 |
3.96 |
31.25 |
4.57 |
36.00 |
9.52 |
73.88 |
12.7 |
132.0 |
33.32 |
238.76 |
25.40 |
186.97 |
350 |
14 |
355.6 |
3.96 |
34.36 |
4.78 |
41.3 |
11.13 |
94.59 |
19.05 |
158.08 |
35.71 |
281.70 |
- |
- |
400 |
16 |
406.4 |
4.19 |
41.56 |
4.78 |
47.29 |
12.7 |
123.30 |
21.41 |
203.33 |
40.46 |
365.11 |
- |
- |
450 |
18 |
457.2 |
4.19 |
46.80 |
4.78 |
53.42 |
14.27 |
155.80 |
23.8 |
254.36 |
45.71 |
466.40 |
- |
- |
500 |
20 |
508.0 |
4.78 |
59.25 |
5.54 |
68.71 |
15.09 |
183.42 |
26.19 |
311.2 |
49.99 |
564.68 |
- |
- |
600 |
24 |
609.6 |
5.54 |
82.47 |
6.35 |
94.45 |
17.48 |
255.41 |
30.96 |
442.08 |
59.54 |
808.22 |
- |
- |
Features & Benefits
Our Duplex & Super Duplex Steel Pipes & Tubes are engineered for extreme performance, combining excellent corrosion resistance, strength, and durability. At Vardhman Steel Overseas, we deliver premium solutions for demanding industrial applications.
- High Strength & Toughness – Superior to austenitic stainless steel grades.
- Excellent Corrosion Resistance – Performs well in chloride and marine environments.
- Stress Corrosion Cracking Resistance – Reliable for offshore and chemical plants.
- Good Weldability & Fabrication – Suitable for custom designs and on-site adjustments.
- Cost Effective – Lower nickel and molybdenum content makes it economical.
- Available in Multiple Grades – Including Duplex 2205, Super Duplex 2507, and more.
- Excellent Mechanical Properties – High yield and tensile strength for structural reliability.
- Wide Range of Sizes – From small OD tubing to large diameter pipes.
- Heat & Pressure Resistant – Ideal for heat exchangers, pressure vessels, and piping.
- Global Compliance – Conforms to ASTM, ASME, EN, NORSOK, and other standards.