Haihao Group Supplies Super Duplex and Inconel Forged Fittings for Singapore Project
Haihao Group has successfully completed the delivery of a batch of high-performance forged pipe fittings for a customer in Singapore.
The shipment includes Super Duplex stainless steel branch fittings and Inconel 625 socket-weld fittings, designed for demanding offshore, marine, and corrosive service environments.
All products were manufactured in strict accordance with MSS SP-97 and ASME B16.11, and comply with NACE MR0175 requirements for sour service applications.
Super Duplex and Inconel forged pipe fittings manufactured by Haihao Group for Singapore offshore project
Product Range and Specifications
Super Duplex Branch Outlet Fittings (UNS S32760)
- Sockolet, 8″ × 1″, Class 3000, Socket Weld
- Weldolet, 1-1/2″ × 12″, Schedule 80S × 1.250″, Bevelled Ends
Material: ASTM A182 Grade F55 (UNS S32760)
Standard: MSS SP-97
Super Duplex F55 offers excellent resistance to pitting corrosion, crevice corrosion, and chloride stress corrosion cracking, making it suitable for offshore and subsea piping systems.
Inconel 625 Socket Weld Fittings (UNS N06625)
- Socket Weld Coupling, 1/2″, Class 3000
- 90-Degree Socket Weld Elbow, 1/2″, Class 3000
Material: ASTM B366 (UNS N06625)
Standard: ASME B16.11
Inconel 625 provides outstanding corrosion resistance and mechanical strength under high temperature and high pressure conditions.
Mechanical, Metallurgical, and Corrosion Testing
To meet the client’s stringent technical requirements, all fittings were subjected to comprehensive testing and inspection, including:
- Low-temperature impact testing at −46°C
- Hardness testing
- Ferrite content control: 40%–60%
- Metallographic examination
- Pitting corrosion testing
- Non-destructive testing (PT, UT)
- PMI (Positive Material Identification) by spectrometer analysis
These tests ensure stable microstructure, reliable toughness at low temperatures, and long-term corrosion resistance.
Quality Documentation Provided
Haihao Group supplied a complete documentation package with the shipment, including:
- Chemical composition reports
- Tensile test reports
- Impact test reports
- Hardness test reports
- PMI reports
- Heat treatment records
- Non-destructive testing reports (PT, UT)
All documents are fully traceable and meet international project and inspection requirements.
Applications and Project Advantages
These forged fittings are widely used in:
- Offshore oil & gas platforms
- Marine and shipbuilding systems
- Chemical and petrochemical plants
- High-pressure and sour-service pipelines
The combination of Super Duplex stainless steel and nickel-based alloy Inconel 625 ensures extended service life, reduced maintenance, and high safety margins in harsh operating conditions.
Why Singapore Clients Trust Haihao Group
Haihao Group has extensive experience supplying special alloy forged fittings for international projects. Our key strengths include:
- Strong manufacturing capability in Super Duplex and nickel alloys
- Strict quality control and advanced testing facilities
- Full compliance with NACE, MSS, and ASME standards
- Complete technical documentation and project support
- Reliable delivery for Southeast Asia and global markets