Duplex Steel Pipe Fittings


Reliable Pipes and Tubes Ltd. is a leading manufacturer, exporter and supplier of buttweld seamless and welded Super duplex fittings, Super duplex flanges and Super duplex fittings. RELIABLE PIPES & TUBES LTD. offers a complete range of super duplex 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 manufacturers in India who can weld, bend and form duplex stainless steel pipe fittings in various sizes and dimensions.

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

Super DUPLEX 32750 SEAMLESS Fittings, Super DUPLEX S32950 PIPE FITTINGS, Super DUPLEX FLANGES Exporter

Duplex steel pipe fittings
Super Duplex Pipe Fittings
Duplex steel pipe flanges
Super Duplex Pipe Flanges
Duplex steel forged fittings
Super Duplex Forged Fittings

Super DUPLEX PIPE BENDS, Super DUPLEX ELBOW, Super DUPLEX TEE, Super DUPLEX REDUCER, Super DUPLEX STUB END, Super Duplex Socket weld & Threaded Fittings Supplier in India.

Super 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.

Super 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.

RELIABLE PIPES & TUBES LTD. 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.

Stainless Steel Tradename UNS no. Werkstoff No. Density (g/cm3)
Duplex F51 / 2205, F60 S32750 / S32950 1.4410 7.805

Super 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 48″NB in Sch 10s, 40s, 80s, 160s, XXS.
Dimensions ANSI/ASME B16.9, B16.28, MSS-SP-43.

Buttweld Super Duplex Pipe Fittings

Seamless/ Welded 100% Radiography Tested

Products Size
Super Duplex Elbows – Long Radius Super Duplex Stub Ends Sizes 1/2″ – 48″
Super Duplex Elbows – Short Radius Super Duplex Crosses
Super Duplex Reducing Elbows Super Duplex Reducing Crosses
Super Duplex 45° Elbows Super Duplex 180° LR Return Bends
Super Duplex Tees Super Duplex 180° SR Return Bends
Super Duplex Tees Super Duplex Pipe Bends / Piggable Bends
Super Duplex Reducers Super Duplex Couplings
Super Duplex Concentric Reducers Super Duplex Pipe Nipples
Super Duplex Eccentric Reducers Super Duplex Forged/Plate Cut Rings
Super Duplex 3D Elbow Super Duplex End Caps
Super Duplex 5D Elbow Super Duplex Forged / Plate Circles


High Pressure Forged Super Duplex Pipe Fittings

Threaded and Socket Weld Pipe Fittings

Products Size
Super Duplex 90° Elbows Super Duplex Couplings Sizes 1/8″ – 4″
Pressure Ratings –
2000 LBS, 3000 LBS, 6000 LBS, 9000 LBS
Super Duplex 45° Elbows Super Duplex Reducers
Super Duplex Street Elbows Super Duplex Inserts
Super Duplex Tees Super Duplex Caps
Super Duplex Crosses Super Duplex Unions


Super Duplex Flanges

Forged and Plate Flanges

Specification ASTM A182 / ASME SA182 F51 / F52 / F53 / F54 / F55 / F57 / F59 / F60 / F61.
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.


Product Size
Super Duplex Slip-On Flanges Super Duplex Threaded Flanges 1/8″ – 36″
Raised Face or Flat Face
Super Duplex Weld Neck Flanges Super Duplex Socket Weld Flanges
Super Duplex Blind Flanges Super Duplex Reducing Flanges
Super Duplex Lap Joint Flanges Super Duplex Plate Flanges