Haihao Group Supplies NACE-Compliant Stainless Steel Flanges to Singapore
Haihao Group has successfully delivered a batch of high-pressure stainless steel flanges to a customer in Singapore, supporting a critical industrial piping system operating under low-temperature and corrosive conditions.
The supplied flanges were manufactured from ASTM A182 F316 / F316L, fully compliant with ASME B16.5, NACE MR0175 / ISO 15156, and supplied with DNV 3.2 certification.
ASTM A182 F316 F316L stainless steel weld neck RTJ flange Class 900 manufactured to ASME B16.5 with NACE MR0175 and DNV 3.2 certification
Stainless Steel Flange Specifications
This shipment included weld neck (WN) and blind flanges with both RTJ and RF facing, covering multiple sizes and pressure classes:
- WN RTJ Flanges
- 1-1/2″ × SCH 80S × Class 900
- 3/4″ × SCH 80S × Class 900
- 4″ × SCH 120 × Class 900
- 8″ × SCH 120 × Class 900
- Blind RTJ Flange
- 3/4″ × Class 900
- WN RF Flange
- 2″ × SCH 40S × Class 300
- Material: ASTM A182 Grade F316 / F316L
- Standard: ASME B16.5
- Sour Service Compliance: NACE MR0175 / ISO 15156
Cryogenic Impact Test and DNV 3.2 Certification
To meet project requirements, all flanges underwent Charpy impact testing at –196°C, achieving a minimum impact energy of 41 Joules.
The products were supplied with DNV 3.2 inspection certificates, ensuring full traceability, independent verification, and suitability for demanding offshore, LNG, and energy-related applications.
Advantages of ASTM A182 F316 / 316L NACE Flanges
ASTM A182 F316/316L stainless steel flanges are widely used in environments requiring excellent resistance to corrosion, chlorides, and sour media.
Combined with RTJ sealing surfaces and Class 900 pressure rating, these flanges provide reliable performance in high-pressure and low-temperature systems.
The compliance with NACE MR0175 / ISO 15156 ensures controlled sulfur content and metallurgical integrity, making them suitable for oil & gas, petrochemical, and offshore installations.
Trusted Stainless Steel Flange Supplier
With extensive experience supplying NACE-compliant stainless steel flanges to Singapore, Haihao Group supports complex projects requiring strict material control, third-party inspection, and international certification.
From Class 300 RF flanges to Class 900 RTJ flanges with DNV 3.2, Haihao Group delivers consistent quality, technical reliability, and on-time shipment.