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.
Table of contents
Duplex Stainless Steel Pipe Sizes
Outside Diameter
5.8-1219mm (0.23"-48")
Wall Thickness
1-50.8mm (0.04"-2")
Length
1m to 12m or custom
Process
Cold Drawn, Cold Rolled
Duplex Pipe Specifications
| Standard Specifications | ASTM A 790 ASME SA 790 |
| Standard | DIN ISO GB JIS BA ANSI |
| 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 |
| Brand | NAMAN |
| 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 |
Lean |
| 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
ASTM A790 Duplex Stainless Steel Pipe
- Duplex Seamless Pipes
- Welded Duplex Pipes
- Duplex Stainless Steel Seamless Pipes
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 |
| Ferrinox 255/ Uranus 2507Cu |
25 | 6.5 | 3.5 | 0.25 | - | - | 1.5 |
You can find detailed information on https://en.wikipedia.org/wiki/Duplex_stainless_steel
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.