Duplex pipe

Duplex pipe
What is Duplex pipe ?

The duplex material has combined properties of ferritic and austenitic stainless steel. Its two-phased microstructure gives duplex pipes some excellent mechanical properties like high strength and toughness. They show high ductility and can resist corrosion, including pitting and crevice. The duplex pipe material has a low molybdenum and nickel content, which is why they come at a lower price compared to the traditional ss grades.

The duplex pipe suppliers ensure that the products have high heat conductivity and low thermal expansion. They can be used up to -50 °C. However, ss duplex pipe should not be used in elevated temperature conditions as there is a risk of brittle phase formation in the ferrite. The material shows good weldability and can effectively resist stress corrosion cracking. However, it has low machinability and formability.

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We are one of India's top suppliers of duplex stainless steel pipe made at reputable mills, check duplex tube application

What is duplex stainless steel pipe used for?

Due to all the benefits offered by duplex stainless steel pipes, they can be used for processing, transporting and storing chemicals. The material also makes up the pipes used in oil & gas exploration, production, transportation and refining.

The duplex steel pipes are perfect for marine environments, structural & mechanical components, heat exchangers, etc.

Why pay more if you can purchase this duplex seamless pipe in the precise size? check thickness here

Duplex stainless steel pipe

Duplex stainless steel pipe

Duplex tube

Duplex tube

Duplex seamless pipe

Duplex seamless pipe

How thick is duplex seamless pipe wall?

The standard duplex seamless pipe thickness ranges between 0.5-20mm. Regent Steel & Engineering Co. offers full customization on the dimensions of the pipes, and you get it at higher thickness too. You can contact them with your requirements and can get advice on which thickness works best for you.

Being a stockist we offer duplex steel tube in Mumbai in sizes ranging from 3.18 to 31.75 mm OD for an affordable price, know about specification

Duplex pipe specification
Size Length Wall Thikness
OD: 11/2 to 24 " 6 to 12 meter 0.3 to 12.7 mm
Specification Grades MTC
ASTM A790/ A789 Duplex 2205 (UNS S32205/ S31803) 10204 3.1 & 3.2
To meet the needs of your project, we are here to provide you with any duplex stainless steel seamless pipe requirements, check DSS tube other types
Basic types of duplex stainless steel pipe
Duplex stainless steel seamless pipe

Duplex stainless steel seamless pipe

  • Size: 4 to 219mm
  • Thickness: 0.5 to 20mm
  • ASTM A789 | ASME SA789
DSS steel pipes

DSS steel pipes

  • Threading
  • Cutting
  • Beveling
Duplex welded pipe

Duplex welded pipe

  • Oil and gas refining
  • Chemical process plant
  • Marine environments
As a leading duplex stainless steel pipe manufacturer, we offer value-added services in addition to a range of wall thicknesses, learn more about properties
DSS mechanical properties
Material Hardness (HB) MAX Yield Strength
0.2% ksi (min)
Elongation % Tensile Strength
ksi (min)
Duplex 217 65 25 90
Duplex seamless pipe equivalent
STANDARD WERKSTOFF NR. UNS
Duplex 1.4462 / 1.4462 UNS S31803 / UNS S32205
DSS welded pipe chemical properties
Mn N C S Si P Cr Mo Ni
2205
(S32205)
2.0
max
min: 0.14
max: 0.20
0.03
max
0.02
max
1.0
max
0.03
max
min: 22.0
max: 23.0
min: 3.0
max: 3.5
min: 4.5
max: 6.5
2205
(S31803)
2.0
max
min: 0.08
max: 0.20
0.03
max
0.02
max
1.0
max
0.03
max
min: 21.0
max: 23.0
min: 2.5
max: 3.5
min: 4.5
max: 6.5
Is duplex tube magnetic?

The duplex tubes are magnetic and this property can differentiate the material from the common austenitic grades.

How do you identify a duplex steel tube?

To identify duplex steel tube, look for the markings and labellings on it. It will also indicate the specific material grade. Always purchase the tubes from reputed suppliers like Regent Steel & Engineering Co., who are well known for their quality products and competitive pricing.

You can get material test reports with details about the chemical composition of duplex stainless steel tubes. Examine the products for their physical properties. Conduct non-destructive tests to ensure the quality and integrity of your duplex seamless tubes.

Is duplex steel pipe heat treatable?

The heat treatment of duplex steel pipes is restricted to their initial production. Once forging or rolling is done, the pipes will undergo solution annealing above 1040 °C. Even though they cannot be hardened by heat treatment, they can be work hardened.

The treatment enhances the resistance of the duplex welded pipe to pitting and crevice corrosion in marine environments. It improves the overall durability of the pipes and make them more cost effective.

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