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Duplex & Super Duplex Steel Products Overview

Parmar TechnoForge Pvt. Ltd. is a trusted manufacturer and exporter of Duplex and Super Duplex Steel Pipe Fittings & Flanges, engineered for superior corrosion resistance, high mechanical strength, and excellent performance in aggressive environments.

Our Duplex and Super Duplex products are extensively used in offshore oil & gas, desalination, petrochemical, and marine industries, where resistance to chloride stress corrosion cracking and pitting is essential.

With advanced forging and machining capabilities, we ensure every product meets international standards and delivers exceptional reliability and longevity in harsh operating conditions.

Product Category Product Type Available Sizes (Standard Range) Applicable Standards
Buttweld Pipe Fittings Elbow (45° / 90° / 180°), Tee (Equal / Reducing), Reducer, Cap, Stub End, Cross, Bends ½” to 48” (DN15–DN1200) ASME B16.9 / ASTM A815 UNS S31803 / S32205 / S32750 / S32760
Forged Socket Weld Fittings Elbow, Tee, Coupling, Union, Cap, Plug, Swage Nipple ⅛” to 4” (DN6–DN100) ASME B16.11 / ASTM A182 F51 / F53 / F55
Forged Threaded Fittings Elbow, Tee, Coupling, Bushing, Plug, Union, Cap ⅛” to 4” (DN6–DN100) ASME B16.11 / ASTM A182 F51 / F53 / F55
Flanges Weld Neck, Slip-On, Blind, Socket Weld, Lap Joint, Threaded, Spectacle ½” to 48” (DN15–DN1200) ASME B16.5 / B16.47 / ASTM A182 F51 / F53 / F55
Outlet Fittings Weldolet, Sockolet, Threadolet, Nipolet, Elbolet ½” to 24” (Run Pipe) MSS-SP-97 / ASTM A182 F51 / F53
Special Fittings 5D Bends, 6D Bends, Mitre Bends, Custom Long Radius Bends 1½” to 48” (Custom Sizes Available) ASME B16.9 / ASTM A815 / Project Spec

Non-standard dimensions and custom fittings can be manufactured as per client drawings and project requirements.

Duplex & Super Duplex Steel Grades

Duplex Grades
  • ❖ UNS S31803 / S32205
  • ❖ ASTM A182 F51 / ASTM A815 UNS S31803
Super Duplex Grades
  • ❖ UNS S32750 / UNS S32760
  • ❖ ASTM A182 F53 / F55 / ASTM A815 UNS S32750 / S32760

Technical Standards

  • ❖ ASME B16.9 / ASME B16.11 / ASME B16.5 / ASME B16.47
  • ❖ ASTM A182 / ASTM A815 / ASTM A479 / ASTM A240
  • ❖ MSS-SP-43 / MSS-SP-97 / BS 3799
  • ❖ NACE MR0175 / MR0103 (for sour service)
  • ❖ EN 10222-5 / EN 10283 / JIS / DIN Standards

Applications

  • ❖ Offshore Oil & Gas Platforms
  • ❖ Chemical & Petrochemical Industries
  • ❖ Seawater Desalination Plants
  • ❖ Marine Engineering & Shipbuilding
  • ❖ Pulp & Paper Industries
  • ❖ Heat Exchangers & Pressure Vessels
  • ❖ Fertilizer and Power Generation Plants

Industries We Serve

  • ❖ Offshore & Subsea Engineering
  • ❖ Petrochemical & Refineries
  • ❖ Marine & Shipbuilding
  • ❖ Water Treatment & Desalination
  • ❖ Fertilizer & Chemical Processing
  • ❖ Pulp & Paper
  • ❖ Power Generation & Energy Projects

Surface Finish & End Connections


Surface Finishes:
  • ❖ Pickled & Passivated
  • ❖ Mirror Polished (on request)
  • ❖ Shot Blasted / Sand Blasted
  • ❖ Anti-Corrosion Coated
End Connections:
  • ❖ Bevelled Ends (for Buttweld Fittings)
  • ❖ Threaded Ends (BSP / NPT)
  • ❖ Socket Weld Ends
  • ❖ Flanged Ends (RF / FF / RTJ)

Packaging & Delivery

  • ❖ End caps and plastic wrapping
  • ❖ Wooden crates, boxes, or pallets
  • ❖ Heat number and grade marking for full traceability

We ensure timely delivery and global export compliance, catering to both bulk and project-based requirements.