High-Pressure RTJ Flanges and Super Duplex Flanges Delivered to Singapore
Haihao Group has successfully completed the delivery of a batch of high-pressure RTJ flanges to a valued customer in Singapore. The shipment includes API 6A Type 6BX flanges and ASME B16.5 RTJ blind flanges, manufactured from nickel alloy UNS N06625 and super duplex stainless steel ASTM A182 F55 / F53 / UNS S32750, fully compliant with NACE MR-0175 / ISO 15156 requirements.
These flanges are designed for critical high-pressure and corrosive service environments, commonly found in oil & gas, offshore, and subsea applications.
ASTM B564 UNS N06625 API 6A TYPE 6BX RTJ Weld Neck Flange
Product Overview
The supplied flange products cover multiple pressure classes and configurations to meet diverse project needs.
Main product range:
- RTJ Blind Flange, 10000 PSI, API 6A Type 6BX
- RTJ Blind Flange, Class 2500, ASME B16.5
- RTJ Weld Neck Flange, SCH 160, 10000 PSI, API 6A Type 6BX
Size range:
- 1″ – 1 13/16″ (10000 PSI)
- 1″, 1 1/2″ – Class 2500
- 4″ Weld Neck, 2 9/16″, SCH 160
Materials:
- ASTM B564 UNS N06625 (Nickel Alloy)
- ASTM A182 Super Duplex Stainless Steel F55 / F53 / UNS S32750
Material Performance and Technical Requirements
For super duplex stainless steel flanges, Haihao Group strictly controls metallurgical performance to meet demanding service conditions:
- PREN ≥ 40.0
- Ferrite content: 40%–60%
- Verified ferrite balance and metallographic structure
- Excellent resistance to pitting and crevice corrosion
- Stable mechanical properties at low temperatures
All flanges are supplied with protective end caps and undergo proper heat treatment to ensure dimensional stability and long-term reliability.
Inspection, Testing, and Certification
To guarantee full traceability and project compliance, Haihao Group provides comprehensive documentation, including:
- Chemical composition report
- Tensile test report
- Hardness test report
- Impact test report (-46°C low-temperature impact)
- PMI (Positive Material Identification) report
- Heat treatment report
- Non-destructive testing reports (PT, UT, etc.)
- Ferrite content and metallographic inspection records
These inspections ensure the flanges meet both international standards and customer-specific technical specifications.
Typical Applications
The supplied RTJ flanges and super duplex flanges are widely used in:
- Offshore oil & gas production systems
- High-pressure wellhead and manifold systems
- Subsea pipeline connections
- Sour service and corrosive environments
Their high pressure rating and corrosion resistance make them ideal for long-term service in harsh operating conditions.
Trusted Flange Manufacturer for Global Projects
As an experienced manufacturer and exporter, Haihao Group supplies high-pressure flanges, RTJ flanges, and super duplex stainless steel flanges to customers worldwide. With strict quality control, advanced testing capabilities, and full certification support, we help international clients meet complex engineering and regulatory requirements.