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 Steel | Tradename | UNS no. | Werkstoff No. | Density (g/cm3) |
| Duplex | F51 / 2205, F60 | S31803 / S32205 | 1.4462 | 7.805 |
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 Fittings Manufacturer/Supplier |  Duplex Pipes Supplier/Stockholder |
Duplex Pipe Fittings Production Range
| Specification | ASTM A 815, ASME SA 815, ASTM A 182, ASME SA 182 |
| Type | Seamless / Welded / Fabricated |
| Range | ½”NB to 24″NB in Sch 10S, 40S, 80S, 160s, XXS |
| Dimensions | ANSI/ASME B16.9, B16.28, MSS-SP-43 |
Buttweld Duplex Pipe Fittings
Seamless/ Welded 100% Radiography Tested
| Products | Size | |
| Duplex Elbows – Long Radius | Duplex Stub Ends | Sizes 1/2″ – 48″ |
| Duplex Elbows – Short Radius | Duplex Crosses | |
| Duplex Reducing Elbows | Duplex Reducing Crosses | |
| Duplex 45° Elbows | Duplex 180° LR Return Bends | |
| Duplex Tees | Duplex 180° SR Return Bends | |
| Duplex Fabricated Tees | Duplex Pipe Bends / Piggable Bends | |
| Duplex Reducers | Duplex Couplings | |
| Duplex Concentric Reducers | Duplex Pipe Nipples | |
| Duplex Eccentric Reducers | Duplex Forged/Plate Cut Rings | |
| Duplex 3D Elbow | Duplex End Caps | |
| Duplex 5D Elbow | Duplex Forged / Plate Circles | |
High Pressure Forged Duplex Pipe Fittings
Threaded and Socket Weld Duplex Pipe Fittings
| Products | Size | |
| Duplex 90° Elbows | Duplex Couplings | Sizes 1/8″ – 4″ Pressure Ratings – |
| Duplex 45° Elbows | Duplex Reducers | |
| Duplex Street Elbows | Duplex Inserts | |
| Duplex Tees | Duplex Caps | |
| Duplex Crosses | Duplex Unions | |
Stainless Steel Duplex Flanges
Forged and Plate Flanges
| Specification | ASTM A182 / ASME SA182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61. |
| UNS Grade | UNS S31803, S32205, S2205, S32550, S32750, S32760. |
| Standard | ANSI Flanges, ASME Flanges, BS Flanges, DIN Flanges, EN Flanges, etc. |
| Size | ½” to 24″ |
| Dimensions | ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc. |
| Class / Pressure | 150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc. |
| Products | Size | |
| Duplex Slip-On Flanges | Duplex Threaded Flanges | 1/8″ – 36″ Raised Face or Flat Face |
| Duplex Weld Neck Flanges | Duplex Socket Weld Flanges | |
| Duplex Blind Flanges | Duplex Reducing Flanges | |
| Duplex Lap Joint Flanges | Duplex 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
| Carbon | ≤0.03 |
| Manganese | ≤2.00 |
| Silicon | ≤1.00 |
| Phosphate | ≤0.03 |
| Sulfur | ≤0.02 |
| Chromium | 21.0-23.0 |
| Nickel | 4.5-6.5 |
| Molybdenum | 2.5-3.5 |
| Nitrogen | 0.08-0.2 |
Mechanical Properties of Duplex Stainless Steel
| Tensile Strength | Yield Strength | Elongation | Rockwell | Charpy V-Notch Impact | |
| ksi.(Mpa) | ksi. (Mpa) | % | Hardness | mm-N/mm2 | mm-N/mm2 |
| 125(862) | 90(621) | 28 | 25C | 1310 | 844 |