Haihao Group Ships DNV 3.2 Certified ASTM A403 WP316/316L Pipe Fittings to Singapore

Haihao Group has successfully completed the delivery of high-specification stainless steel pipe fittings to a customer in Singapore. This shipment includes 90-degree long radius elbows and reducers manufactured from ASTM A403 WP316/316L, fully compliant with ASME B16.9 and NACE MR0175 / ISO 15156 requirements.

Designed for critical service conditions, these fittings were supplied with DNV Class approved 3.2 mill test certificates, ensuring traceability, mechanical reliability, and full compliance with offshore and energy industry standards.

DNV 3.2 certified ASTM A403 WP316 316L SCH 120S elbows and reducers for Singapore project

Supplied Products and Specifications

The order covers multiple sizes of seamless stainless steel fittings with heavy wall thickness, suitable for high-pressure and corrosive environments.

Products included:

• 90° Long Radius Seamless Elbows
  • Sizes: 4″, 6″, 8″
  • Wall Thickness: SCH 120S
  • Material: ASTM A403 WP316 / WP316L (dual certified)
• Seamless Reducers
  • 6″ × 4″ SCH 120S (concentric reducer)
  • 8″ × 6″ SCH 120S (eccentric reducer)
  • Material: ASTM A403 WP316 / WP316L

Standards & Compliance:

• ASME B16.9
• NACE MR0175 / ISO 15156
• DNV Class Approval – EN 10204 3.2

Mechanical Testing and Quality Assurance

To meet stringent project requirements, all fittings underwent comprehensive inspection and testing, including:

• Charpy impact test at -196°C, minimum 41 Joules
• Hardness testing report
• Heat treatment report
• Ultrasonic testing (UT) report

These tests confirm the fittings’ suitability for cryogenic, offshore, and sour service applications, where material toughness and structural integrity are critical.

Applications in Critical Service Environments

Thanks to their corrosion resistance, low-temperature toughness, and certified quality, ASTM A403 WP316/316L SCH 120S pipe fittings are widely used in:

• Offshore oil & gas platforms
• LNG and cryogenic systems
• Chemical and petrochemical plants
• Marine and subsea pipeline projects

The combination of NACE compliance and DNV 3.2 certification makes these fittings especially suitable for demanding international projects.

Reliable Stainless Steel Pipe Fitting Supplier

With extensive experience supplying DNV-certified stainless steel elbows and reducers, Haihao Group supports customers worldwide with consistent quality, strict inspection control, and on-time delivery. Each shipment reflects the company’s commitment to meeting international standards and project-specific requirements.