Haihao Group Delivers Super Duplex ASTM A182 F55 & ASTM A815 UNS S32760 Pipe Fittings for Singapore Offshore Project

Haihao Group has recently completed the production and shipment of a batch of Super Duplex pipe fittings for a customer in Singapore. The order includes a 45° socket weld elbow, a concentric swage nipple, and a socket weld branch outlet, all manufactured to internationally recognized standards for demanding industrial service.

Produced from ASTM A182 Grade F55 and ASTM A815 UNS S32760, these fittings are intended for corrosive process pipelines where high strength, outstanding resistance to chloride attack, and dependable low-temperature toughness are required. Every component was manufactured under strict quality control to meet the customer’s project specifications before export.

Shipment Details

The delivered products include:

45° Socket Weld Elbow

• Size: 3/4″
• Pressure Rating: Class 3000
• Material: ASTM A182 Grade F55 (Super Duplex Stainless Steel)
• Standard: ASME B16.11

Concentric Swage Nipple

• Size: 4″ × 1″
• Wall Thickness: SCH 40S
• Material: ASTM A815 UNS S32760
• Standard: MSS SP-95
• Large End: Beveled according to ASME B16.25
• Small End: Plain End

Socket Weld Branch Outlet

• Size: 4″ × 1-1/2″
• Pressure Rating: Class 3000
• Material: ASTM A182 Grade F55
• Standard: MSS SP-97

This combination of forged and butt-weld fittings provides reliable branch connections and pipe transitions for high-pressure process systems.

ASTM A182 F55 socket weld 45 degree elbows and branch outlets and ASTM A815 UNS S32760 concentric swage nipple

Certified Super Duplex Performance

To satisfy the project requirements, Haihao Group implemented strict manufacturing and inspection procedures throughout production.

Every ASTM A182 F55 fitting was processed to achieve:

• Ferrite content maintained between 40% and 60%
• Qualified mechanical properties after heat treatment
• Low-temperature impact testing at -46°C
• Average absorbed energy 45 J
• Minimum single impact value 35 J

These requirements ensure that each ASTM A182 F55 fitting delivers both corrosion resistance and structural reliability in severe offshore and chemical processing environments.

Precision Manufacturing and Inspection

Haihao Group applies comprehensive inspection procedures to every export order.

The production process included:

• Raw material verification
• Positive Material Identification (PMI)
• Chemical composition analysis
• Ferrite content measurement
• Mechanical property testing
• Low-temperature Charpy impact testing
• Dimensional inspection
• Surface examination
• Final visual inspection and documentation review

Every ASTM A182 F55 fitting is fully traceable from raw material to finished product, ensuring compliance with customer specifications and international standards.

Advantages of Super Duplex Pipe Fittings

Super Duplex stainless steel offers significant advantages over conventional stainless grades, especially in chloride-rich and high-pressure applications.

Key benefits include:

• Excellent resistance to pitting and crevice corrosion
• Outstanding resistance to chloride stress corrosion cracking
• High yield strength and tensile strength
• Excellent fatigue performance
• Long service life in seawater environments
• Reliable toughness under low-temperature operating conditions

These characteristics make ASTM A182 F55 fitting products and ASTM A815 UNS S32760 components ideal for offshore platforms, FPSO facilities, LNG terminals, desalination plants, chemical processing units, and marine piping systems.

Haihao Group Supports Customized Pipeline Projects

Haihao Group manufactures a comprehensive range of forged fittings, butt weld fittings, branch outlets, reducers, flanges, and customized pipeline components in accordance with ASME, MSS, EN, DIN, JIS, and GOST standards.

Whether customers require Super Duplex, duplex stainless steel, stainless steel, alloy steel, carbon steel, or nickel alloy products, our experienced engineering and quality teams ensure every shipment meets the required technical specifications and international quality standards.

If you are looking for a reliable supplier of ASTM A182 F55 fitting products or customized Super Duplex piping components, Haihao Group is ready to support your next project with professional manufacturing and global delivery.