Duplex Steel Pipes, Fittings & Flanges Manufacturers, Suppliers, Factory in India – UNS S31803 / S32205, 2205 Duplex

Duplex 2205 Seamless Pipes & Tubes Manufacturers, Duplex Tubing Factory, Top Quality Duplex Pipe Fittings

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

METLINE Industries is a leading manufacturer, exporter and supplier of seamless and welded duplex fittings, duplex flanges and duplex pipes. METLINE offers a complete range of duplex stainless steel pipe fittings such as duplex reducer, duplex elbow, duplex tee, duplex cross, duplex stub ends and duplex pipe bends. Our inventory for duplex seamless and welded pipes is one of the most extensive in the world. We are one of the few manufacturers in India who can weld, bend and form duplex stainless steel pipe fittings in various sizes and dimensions. Duplex & Super Duplex Fittings & Duplex Pipe provide very efficient corrosion control in the most demanding environments.

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 manufactured and supplied in a variety of sizes and pressure ratings to meet project specific requirements of our customers. Our duplex pipe and fitting products are widely supplied to many industries including boiler manufacturing, brewing tanks and desalination plants.

Duplex stainless steel pipes and duplex fittings are generally lower in cost, as lower percentage of alloying element is used in the manufacture of duplex stainless steel. The yield strength of duplex stainless steel products is higher compared to austenitic stainless steel products, as a result of which users can purchase relatively lower thickness duplex pipes and duplex fittings.

METLINE also stocks and supplies a complete range of duplex seamless pipes to complement our existing production range of duplex buttweld fittings and flanges. As a leading duplex pipes manufacturer we can supply in cut to length sizes and also machined or fabricated to meet your piping requirements.

Duplex Flanges Manufacturer/Supplier

Duplex Flanges Manufacturer/Supplier

Duplex Fittings Manufacturer/Supplier

Duplex Fittings Manufacturer/Supplier

Duplex Pipes Supplier/Stockholder

Duplex Pipes Supplier/Stockholder

Duplex Pipe Fittings Production Range

SpecificationASTM A 815, ASME SA 815, ASTM A 182, ASME SA 182
TypeSeamless / Welded / Fabricated
Range½”NB to 24″NB in Sch 10S, 40S, 80S, 160s, XXS
DimensionsANSI/ASME B16.9, B16.28, MSS-SP-43

Buttweld Duplex Pipe Fittings

Seamless/ Welded 100% Radiography Tested

Duplex Elbows – Long RadiusDuplex Stub Ends

Sizes 1/2″ – 48″

Duplex Elbows – Short RadiusDuplex Crosses
Duplex Reducing ElbowsDuplex Reducing Crosses
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 Forged/Plate Cut Rings
Duplex 3D ElbowDuplex End Caps
Duplex 5D ElbowDuplex Forged / Plate Circles

High Pressure Forged Duplex Pipe Fittings

Threaded and Socket Weld Duplex Pipe Fittings

Duplex 90° ElbowsDuplex Couplings

Sizes 1/8″ – 4″

Pressure Ratings –
2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS

Duplex 45° ElbowsDuplex Reducers
Duplex Street ElbowsDuplex Inserts
Duplex TeesDuplex Caps
Duplex CrossesDuplex Unions

Stainless Steel Duplex Flanges

Forged and Plate Flanges

SpecificationASTM A182 / ASME SA182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61.
UNS GradeUNS S31803, S32205, S2205, S32550, S32750, S32760.
StandardANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc.
Size½” to 24″
DimensionsANSI/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.
Duplex Slip-On FlangesDuplex Threaded Flanges

1/8″ – 36″

Raised Face or Flat Face

Duplex Weld Neck FlangesDuplex Socket Weld Flanges
Duplex Blind FlangesDuplex Reducing Flanges
Duplex Lap Joint FlangesDuplex Plate Flanges

Marking & Packing

Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All fittings and flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.

Quality Assurance

At METLINE, all fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.

Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report

About Duplex Stainless Steel – Widely Known as High Strength, High Corrosion Steel

UNS S32205 or DIN W.Nr. 1.4462, duplex 2205 is an austenitic & ferritic (1:1 ratio) Cr-Mo-Ni alloyed stainless steel. Duplex 2205 or UNS S31803 is the most widely used duplex stainless steel grade as it exhibits both yield strength and great corrosion resistance. At Metline, Duplex stainless steel is available in many forms including plates, bars, pipes, tubes, fittings, flanges, and valves in accordance with relative standards such as ASTM A240, ASTM A479, ASTM A484, ASTM A276, ASTM A789, ASTM A790, ASTM A182, etc. We are a leading manufacturer of duplex pipes and duplex pipe fittings and supply our products to chemical processing, oil & gas piping, marine & high chloride environments, pulp and paper industry, and food industry, etc.

Chemical Composition of Duplex Stainless Steel


Mechanical Properties of Duplex Stainless Steel

Tensile StrengthYield StrengthElongationRockwellCharpy V-Notch Impact
ksi.(Mpa)ksi. (Mpa)%Hardnessmm-N/mm2mm-N/mm2