Duplex Steel Pipe

Duplex Steel Pipe

Duplex Steel Pipe is a type of stainless steel pipe produced and used in applications that require strength and corrosion resistance equally. Naman Pipe & Tubes is a manufacturer of various kinds of stainless steel pipes for use in different industries. The DSS Pipe is special in that it has the ferritic and austenitic steel phases in the material. It allows the Duplex Stainless Steel Pipe to be stronger and corrosion resistant at the same time. There are different types of dss steel; namely, standard, super and lean duplex. These could also be different manufacturing methods and heat treatment procedures.

The DSS Welded Pipes are used for applications with heavy welding. We also produce the seamless pipe which is used in precise applications with accurate measurements. These pipes can be fitted easily and used with dimensional accuracy. As one of the leading Seamless DSS Pipes manufacturers we offer all different grades of pipes in all kinds of steel materials. Our A790 Pipe is manufactured according to the standard for the straight seam welded ferritic, austenitic or DSS pipes. Our Price List is also very competitive to the market pricing. As the leading Duplex Pipes manufacturer we want to give our customers with the best solution. Please contact us with your needs and we are happy to assist you.

Duplex Stainless Steel Pipe Sizes

Outside Diameter

5.8-1219mm (0.23"-48")

Wall Thickness

1-50.8mm (0.04"-2")


1m to 12m or custom


Cold Drawn, Cold Rolled

Duplex Pipe Specifications

Standard Specifications ASTM A 790 ASME SA 790
Schedule SCH10, SCH20, SCH30, SCH40, STD, SCH80
Type Seamless / ERW/ Welded / DOM / EFW / Fabricated / CDW / CEW
Ends Plain End, Beveled End, Treaded
Length Single Random, Double Random & Cut Length.
Color Nickel White
Surface Finish Fine

List of Grades

Grade EN / Werkstoff nr/ UNS Steel Type
2205 Pipes 1.4462/ S31803/ S32205 Standard
2507 Pipes 1.4410/ S32750 Super
LDX 2101 1.4162/ S32101 Lean
DX2202 1.4062/ S32202 Lean
RDN 903 1.4482/ S32001 Lean
LDX 2304

1.4362/ S32304

Zeron 100 Pipes 1.4501/ S32760 Super
Ferrinox 255/ Uranus 2507Cu Pipes 1.4507/ S32520/ S32550 Super
Ferralium 255 Pipes 1.4501/ UNS S32760 Super
Hyper 1.4658/ S32707 / S33207 HDSS

Different Types of Duplex Steel Pipes

Duplex Stainless Steel Pipe

ASTM A790 Duplex Stainless Steel Pipe

  • Duplex Seamless Pipes
  • Welded Duplex Pipes
  • Duplex Stainless Steel Seamless Pipes
ASTM A789 Duplex Stainless Steel Pipe

ASTM A789 Duplex Stainless Steel Pipe

  • Large Diameter Duplex Stainless Steel Pipes
  • 24 Inch Sch60 Big Size Annealed & Pickled Duplex Steel Seamless Pipes

Duplex Stainless Steel Pipe Price in India

  Price per kg in INR Price per kg in US $
Welded INR 300-400 US $ 4.31-5.75
Seamless INR 450-700 US $ 6.47 -10.07

DSS Pipe roughness

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

Duplex Pipe Chemical Composition

DSS Grade Approximate Composition
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
Uranus 2507Cu
25 6.5 3.5 0.25 - - 1.5

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Difference between Duplex Seamless & welded pipe

Duplex is a steel category that has austenitic and ferritic steel characters in its metallurgic microstructure. The pipes in this grade of steel are made up of different procedures. The ones that are drawn from a single billet which make the pipe surface smooth. This type of pipes is called seamless.

The pipes can also be made from a strip of duplex steel with the edges of the strips welded together to make the pipe. The welding could be spiral or longitudinal. Either way, the pipe will have the welded track and it is not as smooth as the seamless ones. So the seamless pipes are preferred for applications that require pipes with more dimensional accuracy.