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Welded Offshore Piping Solutions Corrosion-Resistant Duplex Stainless Steel Fittings custom

Welded Offshore Piping Solutions Corrosion-Resistant Duplex Stainless Steel Fittings Manufacturers

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Material & Manufacturing Process

Corrosion-Resistant Duplex Stainless Steel Fittings | Premium Seamless & Welded Offshore Piping Solutions.

Manufactured in full compliance with ASME B16.9, EN 10253, and ASTM A815 standards, our duplex stainless steel fittings offer exceptional pitting resistance and mechanical yield strength. Utilizing hot-mandrel forming, cold hydraulic bulging, and heavy hydraulic presses up to 6,800 tons, we process premium certified dual-phase alloys. Material options include Duplex S31803 / S32205 (2205), Super Duplex S32750 (2507), S32760, and high-molybdenum 254SMO. Fully compliant with NACE MR0175/ISO 15156 and NORSOK M-650 qualifications, all elbows, tees, reducers, and caps undergo rapid water-quench solution annealing, precision CNC end-beveling, and 100% mandatory NDT inspection (UT, RT, PT) to maintain the ideal ferrite-austenite phase balance.

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Duplex Stainless Steel Fittings Technical Specifications

ParameterSpecification Detail
Material GradeASTM A815, Duplex, S31803, S32205, Super Duplex, S32750
Design StandardASME B16.9, EN 10253, NACE MR0175/ISO 15156
CertificationPED, AD2000, DNV, NORSOK M-650, ABS, BV, ISO, NACE MR0175, EAC
Testing / InspectionUltrasonic (UT), Radiographic (RT), Penetrant (PT)

Specification Range

Jiangyin Gaoxin Pipe Fittings Co., Ltd. fabricates a complete portfolio of duplex stainless steel seamless and welded butt weld fittings, socket weld fittings, and forged branch outlets. Powered by heavy hydraulic presses with capacities up to 6,800 tons, our factory manufactures components across an extensive dimensional range. Size availability spans small-bore lines (DN15 / 1/2") up to extra-large outer diameter fabrications reaching DN3800 (150"). Wall thickness schedules cover light-wall Schedule 10S/40S up to extra-heavy XXS and custom heavy-wall specifications up to 100mm. Advanced coordinate scanning rigorously verifies critical dimensions, wall uniformity, and bevel geometry prior to shipment.

Product Advantages

Operating since 1993 under an ISO 9001 quality management system, our company delivers double the yield strength of conventional austenitic steels alongside superior chloride stress corrosion cracking (SCC) resistance

  • Special Material Expertise: Our duplex fittings hold prestigious global credentials, including NORSOK M-650, PED 2014/68/EU, AD2000, EAC, and marine classification approvals from DNV, ABS, and BV. Every order is supplied with an EN 10204 3.1 Mill Test Certificate featuring full heat-number traceability, PREN > 42 verification, and corrosion testing per ASTM G48
  • Rigorous Testing & Inspection: Paired with robust seaworthy export packaging, our components protect critical client infrastructure while significantly reducing structural weight and life-cycle costs.

Applications

Engineered for extreme fluid velocity, high working pressures, and aggressive marine or sour process media, our duplex stainless steel fittings are core components in high-consequence energy infrastructure. They are widely specified in offshore oil and gas production platforms, FPSO topsides, subsea manifold systems, and reverse osmosis seawater desalination facilities. Furthermore, our NORSOK M-650 qualified S31803 and S32750 fittings perform reliably in onshore petrochemical plants, LNG processing facilities, chemical tanker piping, and marine scrubbers. Their high tensile strength, zero-leak integrity, and exceptional resistance to localized pitting guarantee uninterrupted operational safety across the world's most severe processing environments.

  • Q: What materials and standards apply to Duplex Stainless Steel Fittings?
  • A: We manufacture Duplex Stainless Steel Fittings in materials such as ASTM A815, Duplex, S31803, S32205 and to standards including ASME B16.9, EN 10253, NACE MR0175/ISO 15156, with full material traceability available on request.
  • Q: Can Duplex Stainless Steel Fittings be customized for special project requirements?
  • A: Yes, our engineering team can review drawings, material grades and inspection requirements to provide customized Duplex Stainless Steel Fittings solutions for EPC and industrial projects.
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Jiangyin Gaoxin Pipe Fittings Co., Ltd.
About Us
JIANGYIN GAOXIN PIPE FITTINGS CO.,LTD.
Our company is a professional manufacturer of pressure piping components. As Welded Offshore Piping Solutions Corrosion-Resistant Duplex Stainless Steel Fittings Manufacturers，Our product range covers butt-weld, socket-weld, and threaded pipe fittings, including flanges and customized non-standard parts. These products are widely used in industries such as oil & gas, chemical processing, power generation, shipbuilding, papermaking, metallurgy, pharmaceuticals, and food processing. We manufacture according to standards such as ASME, EN,JIS,DIN,ANSI,GOST, MSS, GB/T,HG, DL, SH, SY,and have a complete range of inspection equipment, a strict quality control system, and various certifications（PED,AD2000,EAC, ABS,BV, DNV,NORSOK M650, ISO9001,ISO14001,ISO45001,etc.）, making us a leader in the industry.

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