Subsidiary Company of Padministeels
DUPLEX PIPE FITTINGS, UNS S31803 | 2205 FLANGES SUPPLIER, STOCKIST IN INDIA
DUPLEX 2205 SEAMLESS PIPES, DUPLEX SS PIPE FITTINGS, DUPLEX FLANGES
DUPLEX PIPE BENDS, DUPLEX ELBOW, DUPLEX TEE, DUPLEX REDUCER, DUPLEX STUB END
| Stainless Steel | Tradename | UNS no. | Werkstoff No. | Density (g/cm3) |
| Duplex | F51 / 2205, F60 | S31803 / S32205 | 1.4462 | 7.805 |
Steel Pipes Online Industries is a leading stockist, exporter and supplier of buttweld seamless and welded duplex fittings, duplex flanges and duplex pipes. Steel Pipes Online 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. We are one of the few suppliers in India who can weld, bend and form duplex stainless steel pipe fittings in various sizes and dimensions.
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 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 supplier, 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 supplier 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.
Steel Pipes Online also stocks and supplies a complete range of duplex seamless pipes to complement our existing production range of duplex buttweld fittings and flanges. Duplex pipes can be supplied in cut to length sizes and also machined or fabricated to meet your piping requirements.
 Duplex Flanges stockist/Supplier |
 Duplex Fitting Supplier |
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 Steel Pipes Online, 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: supplier Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report