Haihao Group Supplies Super Duplex Stainless Steel WN Flange RTJ to Singapore
Haihao Group has successfully delivered a batch of weld neck (WN) flanges with RTJ facing to a valued customer in Singapore. The product details are as follows:
- Product: WN Flange RTJ
- Size: 1″
- Rating: 2500#
- Schedule: S-80S
- Standard: ASME B16.5
- Material: ASTM A182 F55 (Super Duplex Stainless Steel, UNS S32750 / F53)
- Finish: Supplied without painting
Super Duplex Stainless Steel ASTM A182 F55 WN flange RTJ
Material Excellence: ASTM A182 F55 Super Duplex Stainless Steel
The A182 F55 / S32750 / F53 super duplex stainless steel used in this project ensures outstanding performance in aggressive environments. With a pitting resistance equivalent number (PREN) ≥ 40, the flange offers superior resistance against pitting, crevice, and chloride-induced corrosion, making it highly reliable for offshore, oil & gas, and chemical processing industries.
The material’s duplex microstructure balances ferrite (35–55%) and austenite phases, providing both exceptional strength and excellent corrosion resistance. This ensures longer service life compared with standard stainless steels.
Stringent Testing and Quality Assurance
To guarantee product quality and meet project requirements, Haihao Group provided a full set of inspection and testing reports, including:
- Chemical Composition Analysis
- Mechanical Properties (Tensile & Impact at -46℃)
- Hardness Test Report
- Microstructure & Ferrite Content Examination
- PMI (Positive Material Identification) Report
- Heat Treatment Report
- Non-Destructive Testing (PT, UT, etc.)
Every flange is strictly manufactured and tested to comply with ASME B16.5 dimensional standards and international project specifications.
Application Reliability
The WN flange RTJ in super duplex stainless steel is especially suitable for:
- Offshore platforms and subsea pipelines
- High-pressure oil & gas transmission
- Chemical and petrochemical processing plants
- Desalination and marine engineering systems
With its 2500# pressure rating and RTJ sealing face, the flange ensures leak-proof connections under extreme service conditions.