Haihao Group Delivers ASTM A182 F55 Super Duplex Weld Neck Flange to Singapore Project
Haihao Group has successfully completed the production and shipment of a 10-inch ASME B16.5 Weld Neck Flange manufactured from ASTM A182 F55 Super Duplex Stainless Steel for a customer in Singapore. The flange was produced according to strict project specifications, including ferrite content control, low-temperature impact performance verification, and comprehensive quality inspection requirements.
This order demonstrates Haihao Group’s capability in supplying ASTM A182 F55 flange products for demanding offshore, petrochemical, subsea, and corrosion-resistant pipeline applications.
Product Details
| Product | Size | Pressure Rating | Material | Standard |
| Weld Neck Flange RF | 10″ | Class 600 | ASTM A182 F55 (UNS S32760) | ASME B16.5 |
Additional Technical Requirements
- Ferrite content: 40%–60%
- Low-temperature impact test at -46°C
- Average impact energy: 45J
- Minimum impact energy: 35J
- Mechanical properties guaranteed
- Full material traceability maintained throughout production
ASME B16.5 ASTM A182 F55 Super Duplex Weld Neck Flange manufactured by Haihao Group
Why ASTM A182 F55 Super Duplex Stainless Steel?
As a premium super duplex stainless steel grade, ASTM A182 F55 flange material combines excellent corrosion resistance with high mechanical strength.
Compared with conventional stainless steels, F55 offers:
- Superior resistance to chloride-induced pitting corrosion
- Excellent crevice corrosion resistance
- High tensile and yield strength
- Improved stress corrosion cracking resistance
- Long service life in seawater and offshore environments
These advantages make the ASTM A182 F55 flange a preferred choice for offshore platforms, desalination plants, FPSO systems, chemical processing facilities, and marine piping networks.
Manufacturing and Quality Assurance
For this Singapore project, Haihao Group implemented a strict manufacturing and inspection process to ensure the delivered ASTM A182 F55 flange fully complied with project requirements.
Material Verification
Raw forging materials underwent:
- PMI (Positive Material Identification)
- Chemical composition analysis
- Ferrite content examination
- Mechanical property verification
The ferrite phase was carefully controlled within the specified range of 40%–60%, ensuring an optimal balance between strength and corrosion resistance.
Heat Treatment and Mechanical Testing
Appropriate solution annealing and heat treatment procedures were applied to achieve the required metallurgical structure.
The finished flange successfully passed:
- Tensile testing
- Hardness testing
- Charpy V-notch impact testing at -46°C
- Dimensional inspection
- Visual examination
Test results confirmed that the ASTM A182 F55 flange exceeded the specified low-temperature toughness requirements, with an average impact value of 45J and a minimum result of 35J.
Designed for Harsh Service Conditions
Singapore serves as an important hub for offshore engineering, LNG facilities, and marine infrastructure. Components operating in these environments must withstand aggressive chloride exposure, fluctuating temperatures, and demanding operating pressures.
The supplied ASTM A182 F55 flange is particularly suitable for:
- Offshore oil and gas platforms
- LNG terminals
- Seawater treatment systems
- Desalination facilities
- Marine piping networks
- Chemical processing plants
Its combination of corrosion resistance and low-temperature toughness helps reduce maintenance costs and improve long-term operational reliability.
Haihao Group’s Super Duplex Manufacturing Capability
With more than 40 years of experience in pipeline products, Haihao Group manufactures a wide range of super duplex stainless steel components, including:
- Weld Neck Flanges
- Blind Flanges
- Slip-On Flanges
- Spectacle Blinds
- Pipe Fittings
- Branch Connections
- Forged Fittings
Our production facilities support international standards such as:
- ASME B16.5
- ASME B16.47
- ASME B16.48
- MSS SP-97
- EN 1092-1
- DIN Standards
Every project is supported by complete documentation packages, including MTC, PMI reports, mechanical testing reports, heat treatment records, and NDT reports when required.
Looking for Reliable ASTM A182 F55 Flange Suppliers?
Whether your project requires super duplex flanges for offshore platforms, marine systems, LNG facilities, or corrosive process environments, Haihao Group can provide customized solutions with full quality documentation and fast delivery.
Contact our technical team today to discuss your next ASTM A182 F55 flange requirement.