Eka Logo

Duplex Steel Pipes, Fittings & Flanges

Manufacturers, Suppliers, Factory in India UNS S31803/S32205, 2205 Duplex

Stainless SteelTradenameUNS no.Werkstoff No.Density (g/cm3)
DuplexF51/2205, F60S31803/S322051.44627.805

Range of Duplex Stainless Steel Pipe

Duplex flanges, seamless and welded duplex fittings, and duplex pipes are all produced, exported, and supplied by Eka Pipe Fittings. Duplex stainless steel pipe fittings, including duplex reducers, elbows, tees, crosses, stub ends and bends, are all available from Eka Pipe Fittings. We have one of the largest inventories of duplex seamless and welded pipes worldwide. Being able to weld, bend, and form duplex stainless steel pipe fittings in a variety of sizes and dimensions makes us one of the few producers in India. In the most challenging settings, Duplex & Super Duplex Fittings and Duplex Pipe offer incredibly effective corrosion management.

With a PREN of around 35, duplex stainless steels are generally more corrosion resistant than 304 (PREN: 19) and 316 stainless steels (PREN: 26), particularly stress corrosion cracking

Duplex flanges can be produced and delivered in a range of diameters and pressure ratings to satisfy our customers' project-specific needs. We supply a wide range of sectors, including boiler manufacture, brewing tanks, and desalination facilities, with our duplex pipe and fitting solutions.

Because less alloying element is used in the production of duplex stainless steel, duplex pipes and fittings are often less expensive. Because duplex stainless steel goods have a better yield strength than austenitic stainless steel products, consumers can buy duplex pipes and fittings that are considerably thinner in thickness.

In addition to our current production range of duplex buttweld fittings and flanges, Eka Pipe Fittings also maintains and provides an extensive selection of duplex seamless pipes. Being a top producer of duplex pipes, we can provide them machined or manufactured to match your piping specifications, as well as cut to length sizes.

Duplex Pipe Fittings Production Range

SpecificationASTM A 815, ASME SA 815, ASTM A 182, ASME SA 182
TypeSeamless / Welded / Fabricated
Range1/2 NB to 24″NB in Sch 10S, 40S, 805, 160s, XXS
DimensionsANSI/ASME B16.9, B16.28, MSS-SP-43

Buttweld Duplex Pipe Fittings

Seamless/ Welded 100% Radiography Tested

ProductsSize
Duplex Elbows – Long RadiusDuplex Stub Ends 
Duplex Elbows – Short RadiusDuplex Crosses 
Duplex Reducing ElbowsDuplex Reducing CrossesSizes 1/2″ 48″
Duplex 45° ElbowsDuplex 180° LR Return Bends 
Duplex TeesDuplex 180° SR Return Bends 
Duplex Fabricated TeesDuplex Pipe Bends / Piggable Bends 
Duplex ReducersDuplex Couplings 
Duplex Concentric ReducersDuplex Pipe Nipples 
Duplex Eccentric ReducersDuplex 3D Elbow 
Duplex Forged/Plate Cut RingsDuplex End Caps 
Duplex SD ElbowDuplex Forged / Plate Circles 

High Pressure Forged Duplex Pipe Fittings

Threaded and Socket Weld Duplex Pipe Fittings

ProductsSize
Duplex 90° ElbowsDuplex Couplings 
Duplex 45° ElbowsDuplex ReducersSizes 1/8″-4″
Duplex Street ElbowsDuplex InsertsPressure Ratings –
Duplex TeesDuplex Caps2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
Duplex CrossesDuplex Unions 

Stainless Steel Duplex Flanges

Forged and Plate Flanges

SpecificationASTM A182/ASME SA182 F51/FS2/F53/F54/FSS/FS7/F59/F60/F61.
UNS GradeUNS S31803, S32205, S2205, S32550, S32750, S32760.
StandardANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size1/2 to 24″
DiensionsANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.
Class / Pressure150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.
ProductsSize
Duplex Slip-On FlangesDuplex Threaded Flanges 
Duplex Weld Neck FlangesDuplex Socket Weld Flanges1/8″-36″
Duplex Blind FlangesDuplex Reducing FlangesRaised Face or Flat Face
Duplex Lap Joint FlangesDuplex Plate Flanges 

About Duplex Stainless Steel - Widely Known as High Strength. High Corrosion Steel

The stainless steel duplex 2205, also known as UNS S32205 or DIN WNr. 1.4462, is an austenitic and ferritic Cr-Mo-Ni alloyed at a 1:1 ratio. The most popular grade of duplex stainless steel is Duplex 2205, also known as UNS S31803, because of its exceptional corrosion resistance and yield strength. According to relevant standards including ASTM A240, ASTM A479, ASTM A484, ASTM A276, ASTM A789, ASTM A790, ASTM A182, etc., Duplex stainless steel is offered by Eka Pipe Fittings in a variety of forms, including plates, bars, pipes, tubes, fittings, flanges, and valves. As a top producer of duplex pipes and fittings, we serve a variety of industries including chemical processing, pulp and paper, food processing, oil and gas pipeline, marine applications and high chloride conditions.

Chemical Composition of Duplex Stainless Steel

Carbon$0.03
Manganese$2.00
Silicon$100
Phosphate$0.03
Sulfur$0.02
Chromium21.0-23.0
Nickel45-65
Molybdenum25-35
Nitrogen008-02

Mechanical Properties of Duplex Stainless Steel

Tensile StrengthYield StrengthElongationRockwellCharpy V-NotchImpact
ksi.(Mpa)ksi (Mpa)%Hardnessmm-N/mm²mm-N/mm²
125(862)90(621)2825C1310844