Haihao Group Ships DNV 3.2 Certified ASTM A182 F316/316L Weld Neck Flanges to Singapore
Haihao Group has successfully completed the production and delivery of DNV 3.2 certified stainless steel weld neck flanges to a valued customer in Singapore.
The shipment includes 2″ Class 300 WNRF flanges manufactured from ASTM A182 Grade F316/316L (dual certified), produced in strict accordance with ASME B16.5 and compliant with NACE MR0175 / ISO 15156 requirements. These flanges are designed for high-integrity offshore and process piping systems where material traceability and mechanical reliability are essential.
Product Specifications
The supplied flanges meet detailed technical and certification requirements for demanding service conditions.
Main specifications:
- Product: Weld Neck Raised Face Flange (WNRF)
- Size: 2″
- Pipe Schedule: SCH 40S
- Pressure Rating: Class 300
- Standard: ASME B16.5
- Material: ASTM A182 F316 / F316L (Dual Certification)
- Compliance: NACE MR0175 / ISO 15156
- Certification: DNV Class Approved EN 10204 3.2
- Additional Certification: PED
- Testing: Charpy V-Notch Impact Testing
- Protection: Supplied with End Caps
These ASTM A182 F316/316L Class 300 weld neck flanges are widely used in offshore platforms, marine piping systems, chemical plants, and energy projects requiring corrosion resistance and full documentation compliance.
DNV 3.2 certified ASTM A182 F316 316L Class 300 weld neck flange for Singapore project
Strict Testing and Certification Requirements
To meet the project’s stringent specifications, the flanges underwent comprehensive inspection and documentation control, including:
- Chemical composition verification
- Mechanical property testing
- Charpy V-notch impact testing
- Dimensional and visual inspection
- DNV Class approved 3.2 mill certification
- PED compliance documentation
The DNV 3.2 certificate ensures third-party verification of material traceability and conformity, making these flanges suitable for high-spec offshore and European-regulated projects.
Why Choose ASTM A182 F316/316L Flanges?
F316/316L stainless steel offers:
- Excellent resistance to corrosion in chloride environments
- Strong mechanical performance under pressure
- Good weldability for butt-weld connections
- Suitability for sour service applications
The weld neck design provides smooth stress transition from flange to pipe, enhancing long-term performance in critical piping systems.
Supporting Offshore and International Projects
With extensive experience in supplying DNV certified stainless steel flanges, Haihao Group continues to serve customers across Southeast Asia, Europe, and the Middle East. Each project is handled with strict quality control and documentation management to ensure compliance with international engineering standards.