PROVIDING DUPLEX AND SUPER DUPLEX STEEL PRODUCTS SINCE 1975

At Duplex Steel & Alloys, we specialize in Duplex Stainless Steel Pipes designed to deliver exceptional strength, durability, and corrosion resistance. Made with a balanced composition of Chromium (22-23%), Molybdenum (3-3.5%), and Nitrogen (0.14-0.2%), these pipes are ideal for challenging applications in industries like oil and gas, marine engineering, chemical processing, and construction. Their unique metallurgical properties make them highly resistant to pitting and crevice corrosion while offering superior mechanical strength and reliability.

The high Chromium content provides outstanding resistance to corrosion, particularly in environments rich in chlorides, such as seawater. Molybdenum further strengthens the pipes against aggressive chemical environments, while Nitrogen enhances tensile strength and microstructural stability, ensuring long-lasting performance under stress. These properties make our Duplex Steel Pipes the preferred choice for durable applications, such as subsea pipelines, pressure vessels, and chemical reactors.

Duplex Steel Pipe

Mechanical Strength for Reliable Performance

Duplex Steel Pipes excel due to their exceptional mechanical properties, making them reliable in demanding conditions. With a tensile strength of ≥620 MPa, these pipes can withstand significant forces without failure, which is essential for high-pressure systems like pipelines and boilers. The yield strength of ≥450 MPa supports heavy loads, ensuring structural integrity in construction and equipment applications. An elongation of ≥25% ensures ductility, allowing the material to resist cracking under stress, which is critical for industries like shipbuilding and aerospace. These properties make the pipes versatile for environments involving extreme pressures and temperatures.

International Standards for Quality Assurance

Our DS Pipes are manufactured in strict compliance with global quality standards. They meet the requirements of ASTM A789 and ASTM A790, ensuring suitability for both seamless and welded pipes. Compliance with EN 10088 guarantees material consistency and mechanical reliability, while ISO 9001 certification reflects our commitment to quality management. Furthermore, our products adhere to ASME and PED (Pressure Equipment Directive) certifications, which are essential for safety and reliability in pressure-related applications. These accreditations establish Duplex Steel & Alloys as a trusted supplier of premium stainless steel pipes for industries worldwide.

Testing for Excellence

Every Duplex Steel Pipe undergoes rigorous testing to ensure performance, safety, and durability. Positive Material Identification (PMI) verifies the chemical composition, ensuring the pipes conform to Duplex grade standards. This is crucial in chemical processing and power generation industries, where material integrity directly impacts operational safety.

Hydrostatic testing evaluates the pipes’ pressure-handling capabilities, ensuring they can operate without leaks under high-pressure conditions. This makes them ideal for pipelines, tanks, and pressure vessels. Radiographic testing is conducted for duplex steel welded pipes to detect internal defects such as voids or cracks, ensuring structural and weld integrity. These tests underscore our commitment to delivering flawless, high-performing products.

Applications Across Industries

Duplex Steel Pipes are versatile, meeting the needs of diverse industries. In the oil and gas sector, they are ideal for handling corrosive substances like H2S and chlorides, making them indispensable for subsea pipelines and offshore platforms. In chemical processing, their resistance to acids and alkalis ensures long-term performance in reactors, heat exchangers, and storage tanks.

In shipbuilding, their high resistance to seawater corrosion makes them perfect for hulls, ballast systems, and propulsion components. In construction, their high load-bearing capacity and long-lasting durability make them reliable for critical infrastructure. These pipes also perform exceptionally well in power generation, where their strength and heat resistance are crucial for turbines and boilers.

Grades Comparison: S31803 vs. 32205

Both S31803 and 32205 are widely used duplex grades. While duplex steel S31803 pipes offer excellent corrosion resistance and strength for general applications, duplex steel 32205 pipes have slightly higher nitrogen content , enhancing their resistance to more aggressive environments like those in offshore platforms or chemical plants. With both grades available, Duplex Steel & Alloys can help you select the best option for your specific requirements.

Logistics and Documentation

We ensure smooth delivery and complete documentation for every order. Each shipment includes a Material Test Certificate (MTC) to verify compliance with international standards, dimensional reports, and packing lists for accurate handling and installation. Our efficient logistics network ensures timely delivery to Mumbai and other locations across India and globally. Whether you need a single pipe or a bulk order, we prioritise accuracy and reliability.

Why Choose Duplex Steel & Alloys?

At Duplex Steel & Alloys, our Duplex Stainless Steel Pipes combine strength, durability, and corrosion resistance to meet the demands of the most challenging applications. Backed by international certifications, rigorous testing, and a customer-focused approach, we are committed to delivering products that meet and exceed your expectations.

Contact us today to discuss your project requirements or request a customized quote. With Duplex Steel & Alloys, you get trusted quality, on-time delivery, and exceptional performance for all your industrial needs.


Duplex Stainless Steel Pipe Specification

Specifications ASTM A790, A928 / ASME SA790, SA928
Dimensional ANSI/ASME B36.19M, ANSI/ASME B36.10M
Seamless Pipe Size 1 / 2″ NB – 16″ NB
Welded Pipe Size 1 / 2″ NB – 24″ NB
EFW Pipe Size 6″ NB – 24″ NB
Outside Diameter 6.00 mm OD up to 914.4 mm OD, Sizes up to 24” NB available Ex-stock, OD Size Steel Tubes available Ex-stock
Pipes Manufacturing Shapes Round, Rectangle, Square
Pipe Manufacturing Techniques Seamless / Welded / ERW / Fabricated / CDW / 100% X Ray Welded
Pipe Schedule Thickness Range SCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXS, SCH XS
Pipes End Types Plain End, Beveled End, Treaded One End, TBE (Treaded Both Ends)
Delivery Condition Annealed and Pickled, Polished, Bright Annealed, Cold Drawn

Types of Duplex Stainless Steel Pipes

Seamless Pipe

Seamless Pipe

Welded Pipe

Duplex Steel Welded Pipe

ERW Pipe

ERW Pipe

ERW Pipe

ASTM A928 EFW pipe

Square Pipe

Duplex Steel Square Pipe

Rectangular Pipe

Duplex Steel Rectangular Pipe

Round Pipe

DSS Round Pipe

Polished Pipe

ASTM A790 Polished Pipe

Thin Wall Pipe

ASTM A790 Thin Wall Pipe

Duplex Steel Pipe Pressure Rating, ASTM A928 EFW Pipe, Duplex Steel Pipe Weight Per Foot, Duplex Steel Pipe Suppliers in Mumbai.

If you are looking for best prices for Duplex Steel Pipes, DSS Welded Pipe, Duplex Steel Pipe email us on info@duplexsteelalloys.com or call us on +91 9664408767

Duplex Stainless Steel Pipe Price List

Product Price
Duplex Steel Welded Pipe Price US $ 1100-2000 / Ton
DSS Square Pipe Price List US $ 2200-3500 / kg
Custom Size 4 Inch DSS Welded Pipes Price US $ 1400-12000 / Ton
DSS Pipe Price US $ 1000-3000 / Ton
DSS Pipe Price List $800 - 1300/ Ton
20mm diameter Polished Duplex Steel Pipes Price $898.00 - $1,380.00/ Ton
ASTM A790 Welded SCH 5S DN500 Plain End Steel Pipe Price List $700.00 - $1,500.00/ Ton
Pipe Price Per KG $1182.00 - $2200.00/ Ton
Schedule 10 Duplex Steel Pipes Price $1,882.00 - $2,889.00/ Ton

Duplex Stainless Steel Pipe Schedule Chart

1/4" IPS(.0540"OD) 4" IPS(4.0500"OD)
SCH 40, 10, 80 SCH 40, 10, 80, XXH, 160
1/8" IPS(.0405"OD) 3 1/2" IPS( 4.0000"OD)
SCH 40, 80 SCH 40, 10, 80, XXH, 160
1/2" IPS(.0840"OD) 6" IPS(6.0625"OD)
SCH 5, 40, 10, 80, XXH, 160 SCH 5, 40, 10, 80, 120, XXH, 160
3/8" IPS(.0675"OD) 5" IPS( 5.0563"OD)
SCH 40, 10, 80 SCH 40, 10, 80, XXH, 160
1" IPS:(1.0315′OD) 10" IPS(10.0750"OD)
SCH 5, 40, 10, 80, XXH, 160 SCH 10, 20, 40, 80 (.0500), TRUE 80(.0500)
2 1/2" IPS(2.0875"OD) 18" IPS (18.0000"OD)
SCH 40, 10, 80, XXH, 160 SCH-40 (.0375)
3/4" IPS(1.0050"OD) 8 ” IPS(8.0625"OD)
SCH 40, 10, 80, XXH, 160 SCH 5, 40, 10, 80, 120, XXH, 160
1-1/4" IPS(1.0660"OD) 12" IPS(12.0750"OD)
SCH 40, 10, 80, XXH, 160 SCH 10, 20, 40(.0375), TRUE40(.0406), SCH80(.0500)
2" IPS(2.0375"OD) 16" IPS(16.0000"OD)
SCH 40, 10, 80, XXH, 160 SCH10(.0188), SCH40(.0375)
1-1/2" IPS(1.0900"OD) 14" IPS(14.0000"OD)
SCH 40, 10, 80, XXH, 160 SCH10 (.0188), SCH40 (.0375)
3" IPS( 3.0500"OD)  
SCH 5, 40, 10, 80, XXH, 160

Duplex Steel Pipe Weight Chart

NPS Outside Diameter Wall Thickness Weight Weight
inch milimeter inch milimeter Schedule kg/Mtr Lb/ft
1/2″ 0.0840 21 0.0109 2.0769 40 STD 1.0268 0.0851
0.0147 3.0734 80 STD 1.0621 1.0088
3/4″ 1.0050 27 0.0113 2.0870 40 STD 1.0684 1.0131
0.0154 3.0912 80 STD 2.0195 1.0474
1″ 1.0315 33 0.0133 3.0378 40 STD 2.0501 1.0679
0.0179 4.0547 80 STD 3.0325 2.0172
1 1/4″ 1.0660 42 0.0140 3.0556 40 STD 3.0385 2.0273
0.0191 4.0851 80 STD 4.0464 2.0997
1 1/2″ 1.0900 48 0.0145 3.0683 40 STD 4.0048 2.0718
0.0200 5.0080 80 STD 5.0409 3.0361
2″ 2.0375 60 0.0154 3.0912 40 STD 5.0441 3.0653
0.0218 5.0537 80 STD 7.0480 5.0022
2 1/2″ 2.0875 73 0.0203 5.0516 40 STD 8.0629 5.0793
0.0276 7.0010 80 STD 11.0411 7.0661
3″ 3.0500 89 0.0216 5.0486 40 STD 11.0284 7.0576
0.0300 7.0620 80 STD 15.0272 10.0253
4″ 4.0500 114 0.0237 6.0020 16.0073 10.0790
0.0337 8.0560 22.0318 14.0983
6″ 6.0625 168 0.0188 4.0775 19.0252 12.0924
0.0203 5.0516 20.0739 13.0923
0.0219 5.0563 22.0318 14.0983
0.0250 6.0350 25.0354 17.0021
0.0280 7.0112 40 STD 58.0263 18.0974
0.0312 7.0925 31.0334 21.0036
0.0375 9.0525 37.0285 25.0031
0.0432 10.0973 80 XHY 42.0561 28.0573
0.0500 12.0700 48.0719 32.0708
8″ 8.0625 219 0.0188 4.0775 25.0233 16.0940
0.0203 5.0156 27.0198 18.0259
0.0219 5.0563 29.0286 19.0661
0.0250 6.0350 20 33.0308 22.0361
0.0277 7.0036 30 36.0786 24.0696
0.0322 8.0179 40 42.0352 28.0554
0.0375 9.0525 49.0216 33.0041
0.0406 10.0312 60 53.0085 35.0638
0.0500 12.0700 80 XHY 64.0627 43.0388
10″ 10.0750 273 0.0188 4.0775 31.0588 21.0207
0.0219 5.0563 36.0689 24.0631
0.0250 6.0350 20 41.0759 28.0035
0.0307 7.0798 30 51.0002 34.0240
0.0344 8.0738 56.0946 38.0231
0.0365 9.0271 40 STD 63.0301 40.0483
0.0438 11.0125 71.0852 48.0238
0.0500 12.0700 60 XHY 81.0530 54.0735
0.0594 15.0088 80 95.0969 64.0429
12″ 12.0750 324 0.0188 4.0775 37.0570 25.0222
0.0219 5.0563 43.0657 29.0309
0.0250 6.0350 49.0713 33.0375
0.0281 7.0137 55.0739 37.0420
0.0312 7.0925 61.0735 41.0445
0.0375 9.0525 73.0824 49.0562
0.0406 10.0312 79.0727 53.0525
0.0500 12.0700 97.0438 65.0415
0.0562 14.0275 108.0966 73.0154
14″ 14.0000 356 0.0188 4.0775 41.0308 27.0732
0.0219 5.0563 48.0012 32.0233
0.0250 6.0350 20 54.0685 36.0713
0.0281 7.0137 61.0327 41.0172
0.0312 7.0925 67.0939 45.0611
0.0375 9.0525 STD 81.0281 54.0568
0.0438 11.0125 40 94.0498 63.0441
0.0500 12.0700 XHY 107.0381 72.0090
0.0625 15.0875 132.0983 89.0278
16” 16.0000 406 0.0188 4.0775 47.0290 21.0748
0.0219 5.0563 54.0980 36.0910
0.0250 6.0350 10 62.0639 42.0053
0.0281 7.0137 70.0268 47.0174
0.0312 7.0925 20 77.0866 52.0275
0.0344 8.0738 85.0677 57.0519
0.0375 9.0525

30

STD

93.0213 62.0578
0.0438 11.0125 108.0433 72.0797
0.0500 12.0700

40

XHY

123.0289 82.0770
18″ 18.0000 457 0.0219 5.0563 61.0948 41.0588
0.0250 6.0350 70.0593 47.0393
0.0281 7.0137 79.0208 53.0176
0.0312 7.0925 20 87.0792 58.0939
0.0375 9.0525 STD 105.0144 70.0588
0.0438 11.0125 30 122.0369 82.0152
0.0500 12.0700 XHY 139.0198 93.0450
0.0562 14.0275 40 155.0904 104.0666
0.0625 15.0875 172.0754 115.0978
20″ 20.0000 508 0.0250 6.0350 78.0547 52.0733
0.0282 7.0163 88.0458 59.0386
0.0312 7.0925 97.0719 65.0604
0.0375 9.0525 20 STD 117.0075 78.0598
0.0438 11.0125 136.0305 91.0508
0.0500 12.0700 30 XHY 155.0106 104.0130
0.0594 15.0088 40 183.0378 123.0110
0.0625 15.0875 192.0640 129.0328
0.0688 17.0475 211.0368 141.0901
24″ 24.0000 610 0.0250 6.0350 94.0456 63.0413
0.0281 7.0137 106.0029 71.0183
0.0312 7.0925 117.0573 18.0932
0.0375 9.0525 20 STD 140.0938 64.0618
0.0438 11.0125 164.0176 110.0219
0.0500 12.0700 XHY 186.0923 125.0490
0.0625 15.0875 232.0410 156.0028
0.0688 17.0475 40 255.0148 171.0293
0.0750 19.0050 277.0401 186.0233
30″ 30.0000 762 0.0250 6.0350 118.0318 79.0433
0.0281 7.0137 132.0851 89.0189
0.0312 7.0925 10 147.0353 98.0925
0.0375 9.0525 STD 176.0731 118.0648
0.0438 11.0125 205.0983 138.0286
0.0500 12.0700 20 XHY 234.0647 157.0530
0.0625 15.0875 30 292.0066 196.0078
0.0688 17.0475 320.0817 215.0380
0.0750 19.0050 348.0988 234.0293
36″ 36.0000 914 0.0250 6.0350 142.0180 95.0453
0.0281 7.0137 159.0672 107.0196
0.0312 7.0925 10 177.0133 118.0918
0.0375 9.0525 STD 215.0525 142.0678
0.0438 11.0125 247.0790 166.0353
0.0500 12.0700 20 XHY 282.0372 198.0570
0.0625 15.0875 351.0723 236.0128

0.0688

17.0475 386.0487 259.0467

0.0750

19.0050 420.0576 282.0353
42″ 42.0000 1067 0.0312 7.0925 206.0914 138.0911
0.0375 9.0525 STD 248.0319 166.0708
0.0500 12.0700 XHY 33.0097 221.0610
0.0750 19.0050 492.0163 330.0413
48″ 48.0000 1219 0.0375 9.0525 STD 284.0112 190.0738
0.0438 11.0125 331.0404 222.0487
0.0500 12.0700 XHY 377.0822 253.0650
0.0750 19.0050 563.0750 378.0473
0.0875 22.0225 655.0969 440.0383

Duplex Steel Pipe Composition

MATERIAL COMPOSITION % (APPROX)
Cr Ni Mo N Mn W Cu
2101 LDX 21.5 1.5 0.3 0.22 5 - -
DX2202 23 2.5 0.3 0.2 1.5 - -
RDN 903 20 1.8 0.2 0.11 4.2 - -
2304 23 4.8 0.3 0.10 - - -
2205 22 5.7 3.1 0.17 - - -
2507 25 7 4 0.27 - - -
Zeron 100 25 7 3.2 0.25 - 0.7 0.7
Ferrinox
255/
Uranus 2507Cu
25 6.5 3.5 0.25 - - 1.5

Duplex Pipe Roughness

Outside surface roughnes Inside surface roughness
RA 20 defect level max. 50 μm RA 20 defect level max. 20 μm

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Stock available for Range of Duplex Steel Plate

  • Duplex Steel Pipe
  • Duplex Steel Pipe Catalogue
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  • Duplex Steel Seamless Pipes
  • Duplex Steel Pipe Weight Chart
  • Duplex Steel Pipe Chart
  • DSS Seamless Pipes
  • DSS Schedule 40 Pipe
  • Duplex Steel Pipe Dimensions
  • 12 inch Duplex Stainless Steel Pipe
  • ASME SA790 Duplex Steel Pipes
  • Duplex Steel ERW Pipes
  • Duplex Steel Pipe Weight Calculator
  • DSS Welded Pipes
  • Duplex Steel Rectangular Pipe
  • 2 Inch Duplex Steel Pipe
  • Large Diameter Duplex Steel Pipe
  • ASTM A928 Duplex Steel EFW Pipe
  • Cost Of Duplex Stainless Steel Pipe
  • Duplex Steel Seamless Pipe Pressure Rating
  • Duplex Stainless Steel Pipe

Tests of ASTM A790 Duplex Stainless Steel Pipes

Before being prepared for shipment to the customer, ASTM A790 Duplex Stainless Steel Seamless Pipes Testing should be constructed in accordance with applicable standards and thoroughly tested for potential flaws.

Outside Diameter Control

Outside Diameter Control

X-Ray Testing

X-Ray Testing

Hydrostatic Testing

Hydrostatic Testing

ASTM A790 Duplex Stainless Steel Pipes Supply Range

Product Description Wall Thickness, WT (In MM) Outside Diamter, OD (In MM)
Inner/Outside Polished Pipes 1.00 – 5 12.05 To 203.02
Rectangular Pipe 0.05 to 30 10*20 To 100*200
Square Pipe 0.05 to 30 12.07* 12.07 To 300* 300
Round Pipe 0.05 to 30 6 – 630
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UNS Seamless Pipes Supply in Below Countries

Products We Supplied Description Country
Duplex Steel Large Diameter Pipe 20MM Diameter Duplex Steel Pipes Nigeria, Australia, Canada, Ellington -United States
Duplex Steel Welded Pipe DSS Welded Square Pipe Supply Romania, Norway, UAE, Europe
ASTM A790 Duplex Steel Round Pipe DSS Custom Pipe Egypt, France, Mexico, Malaysia
Duplex Steel EFW Pipes Schedule 40 ASTM A790 Pipe Kuwait, South Africa, Taiwan, Philippines
20mm diameter 0.1mm DSS Pipe Thin Wall ASME SA790 Welded Pipe Singapore, Finland, Maldives, Costa Rica, Uruguay
ASTM A790 Rectangular Pipes 10*20mm to 100*200mm DSS Thin-Wall Pipe Saudi Arabia, Thailand, Vietnam, Indonesia
Duplex Steel Polished Pipe Thickness 9.0mm Duplex Stainless Pipe Colombia, Tunisia, Mongolia, Ukraine