Supplier of Duplex and Super Duplex Steel Buttweld Fitting in India
Duplex & Super Duplex Steel Buttweld Fittings offer superior strength, excellent corrosion resistance, and reliable performance in high-pressure environments. Manufactured using premium-grade raw materials like UNS S31803, S32205, and S32507, these fittings are designed to meet demanding industrial standards with precision and durability.
We provide a complete range of buttweld fittings including Elbows, Tees, Reducers, Stub Ends, Crosses, Pipe Bends, and Caps. The UNS S32205 Elbow is engineered to efficiently change the direction of flow in piping systems and is available from NPS ½” to 48”. These elbows are significantly stronger than standard austenitic stainless steel elbows, making them ideal for heavy-duty use.
Our Duplex 2205 Stub Ends are used to connect two pipes with the help of backing rings and gaskets, offering easy assembly and disassembly for maintenance. The Duplex 2205 Tees come with three female outlets to connect pipes of different sizes and enable fluid distribution across branches. We also offer Reducers—both concentric and eccentric—that are perfect for joining pipes of varying diameters.
For more critical applications, our Super Duplex UNS S32750 and UNS S32760 Buttweld Fittings are crafted to offer maximum strength and resistance to pitting, stress corrosion, and crevice corrosion. The SAF 2507 Tees and ANSI B16.9 Stub Ends are especially preferred in aggressive environments such as chemical processing, offshore oil rigs, and desalination plants.
All fittings are manufactured under stringent quality controls and follow international standards such as ASME SA 403, SA 240, and ANSI B16.9. Our skilled team utilizes advanced machinery to ensure each fitting delivers long-lasting performance. Custom sizes, thicknesses, and end connections are available to meet specific project needs.
Specification of Duplex and Super Duplex Steel Butt Weld Fittings
| Specification | Details / Grades | Available Types |
|---|---|---|
| Standard | ASTM A815 / ASME SA815 |
|
| Dimensions | ASME B16.9, B16.28, MSS-SP-43, BS4504, BS1560, BS10 | |
| Size (Seamless) | ½” – 10” | |
| Size (Welded) | ½” – 48” | |
| Size Range | ½” NB to 24” NB in Sch 10s, 40s, 80s, 160s, XXS (DN6 ~ DN100) | |
| Thickness | SCH10, SCH20, SCH30, STD, SCH40, SCH60, XS, SCH80, SCH100, SCH120, SCH140, SCH160, XXS | |
| Connection | Welding | |
| Type | DN15 – DN1200 | |
| Manufacturing Process | Push, Press, Forge, Cast, Hot / Cold Forming, Seamless, Welded | |
| Test Certificates | EN 10204/3.1B, Raw Material Certificate, 100% Radiography, Third Party Inspection | |
| Specialized In | Elbows, Tees, Crosses, Reducers, Pipe Cap, Stub End, Pipe Bends | |
| Grades |
Duplex 2205 (UNS S31803 / S32205), Super Duplex 2507 (UNS S32750 / S32760) |
|
| EIL & IBR Approved Fittings | ||
Types of Buttweld Fittings
Explore our precision-engineered Buttweld Fittings designed for leak-proof and high-strength piping systems.
Buttweld Elbow
Elbows allow directional changes in piping systems, available in 45°, 90°, and 180° bends for smooth fluid flow with minimal pressure loss.
Buttweld Tee
Tees are used to split or combine flow in pipelines, offered in equal and reducing types for
multiple outlet configurations.
Buttweld Reducer
Reducers transition between pipe sizes, available in concentric (center-aligned) and eccentric (offset) types to manage flow and avoid turbulence.
Buttweld Cap
End caps are used to block the end of a piping system, providing secure sealing in high-pressure and high-temperature conditions.
Buttweld Stub End
Stub ends are used with lap joint flanges, making them ideal for systems requiring frequent dismantling for inspection or maintenance.
Buttweld Nipple
Nipples are short pieces of pipe with bevelled ends used for connecting fittings, valves, or
other equipment in tight spaces.
Pressure Rating of Duplex & Super Duplex Steel Fittings
| NPS (inch) |
Pipe Sch. | Wall Thk. (in) |
OD (inch) |
Temperature | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 | 200 | 300 | 400 | 500 | ||||||||
| Allowable Stress (Pressure Rating) | ||||||||||||
| 16700 | 16700 | 16700 | 15500 | 14400 | ||||||||
| 1" | 40 | 0.133 | 1.315 | 2205 | 2205 | 2205 | 2047 | 1902 | ||||
| 80 | 0.179 | 1.315 | 3061 | 3061 | 3061 | 2841 | 2640 | |||||
| 160 | 0.250 | 1.315 | 4493 | 4493 | 4493 | 4170 | 3874 | |||||
| 1 1/2" | 40 | 0.145 | 1.900 | 1629 | 1629 | 1629 | 1512 | 1404 | ||||
| 80 | 0.200 | 1.900 | 2303 | 2303 | 2303 | 2138 | 1986 | |||||
| 160 | 0.281 | 1.900 | 3362 | 3362 | 3362 | 3120 | 2899 | |||||
| 2" | 40 | 0.154 | 2.375 | 1371 | 1371 | 1371 | 1272 | 1182 | ||||
| 80 | 0.218 | 2.375 | 1985 | 1985 | 1985 | 1843 | 1712 | |||||
| 160 | 0.344 | 2.375 | 3283 | 3283 | 3283 | 3047 | 2831 | |||||
| 3" | 40 | 0.216 | 3.500 | 1301 | 1301 | 1301 | 1208 | 1122 | ||||
| 80 | 0.300 | 3.500 | 1844 | 1844 | 1844 | 1712 | 1590 | |||||
| 160 | 0.438 | 3.500 | 2787 | 2787 | 2787 | 2587 | 2403 | |||||
| 4" | 40 | 0.237 | 4.500 | 1102 | 1102 | 1102 | 1023 | 950 | ||||
| 80 | 0.337 | 4.500 | 1596 | 1596 | 1596 | 1482 | 1377 | |||||
| 160 | 0.531 | 4.500 | 2611 | 2611 | 2611 | 2424 | 2552 | |||||
| 5" | 40 | 0.258 | 5.563 | 965 | 965 | 965 | 896 | 832 | ||||
| 80 | 0.375 | 5.563 | 1428 | 1428 | 1428 | 1325 | 1231 | |||||
| 160 | 0.625 | 5.563 | 2474 | 2474 | 2474 | 2296 | 2133 | |||||
| 6" | 40 | 0.280 | 6.625 | 877 | 877 | 877 | 814 | 756 | ||||
| 80 | 0.432 | 6.625 | 1379 | 1379 | 1379 | 1280 | 1189 | |||||
| 160 | 0.719 | 6.625 | 2382 | 2382 | 2382 | 2211 | 2054 | |||||
| 8" | 40 | 0.322 | 8.625 | 771 | 771 | 771 | 716 | 665 | ||||
| 80 | 0.500 | 8.625 | 1218 | 1218 | 1218 | 1131 | 1050 | |||||
| 160 | 0.906 | 8.625 | 2298 | 2298 | 2298 | 2133 | 1982 | |||||
| 10" | 40 | 0.365 | 10.750 | 699 | 699 | 699 | 649 | 603 | ||||
| 80 | 0.594 | 10.750 | 1159 | 1159 | 1159 | 1075 | 999 | |||||
| 160 | 1.125 | 10.750 | 2289 | 2289 | 2289 | 2124 | 1974 | |||||
Werkstoff Nr. 1.4462 Fittings Dimensions
| NOMINAL PIPE SIZE | ALL FITTINGS | ALL FITTINGS | ELBOWS AND TEES | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS | 180 DEG RETURN BENDS | REDUCERS | CAPS |
|---|---|---|---|---|---|---|---|---|
| NPS | O.D. at Bevel (1), (2) | I.D. at End (1), (3), (4) |
Centre -to- End Dimension A, B, C, M | Centre-to- Centre O | Back-to- Face K | Alignment of Ends U | Overall Length H | Overall Length E |
| ½ to 2½ | 0.06 -0.03 |
0.03 | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 3 to 3 ½ | 0.06 | 0.06 | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 4 | 0.06 | 0.06 | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.12 |
| 5 to 8 | 0.09 -0.06 |
0.06 | 0.06 | 0.25 | 0.25 | 0.03 | 0.06 | 0.25 |
| 10 to 18 | 0.16 -0.12 |
0.12 | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 20 to 24 | 0.25 -0.19 |
0.19 | 0.09 | 0.38 | 0.25 | 0.06 | 0.09 | 0.25 |
| 26 to 30 | 0.25 -0.19 |
0.19 | 0.12 | … | … | … | 0.19 | 0.38 |
| 32 to 48 | 0.25 -0.19 |
0.19 | 0.19 | … | … | … | 0.19 | 0.38 |
Features & Benefits
Our robust range of Duplex and Super Duplex Steel Buttweld Fittings offers exceptional mechanical strength, corrosion resistance, and durability for aggressive and high-stress environments. At Vardhman Steel Overseas, we supply fittings in premium grades like UNS S31803, S32205, S32750, S32760 to ensure superior quality and reliability across critical applications.
- High Strength & Corrosion Resistance – Combines ferritic and austenitic properties for unmatched performance.
- Superior Stress & Fatigue Resistance – Withstands high-pressure environments and cyclic loading.
- Excellent Weldability & Workability – Ideal for fabrication and custom-fit assemblies.
- Perfect for Aggressive Media Handling – Performs well in chloride and acidic conditions.
- Longer Service Life – Reduced maintenance in offshore, marine, and chemical sectors.
- Custom Wall Thicknesses – SCH10 to XXS and specialized options available.
- Multiple Bending Radius – 1D, 1.5D, 3D, 5D & tailor-made configurations.
- International Standards – Conforms to ASME, ASTM, DIN, MSS-SP & more.
- Quick Availability – Wide stock range of elbows, tees, reducers, stubs & bends.
- Used in Demanding Industries – Oil & gas, petrochemical, desalination, and power plants.