Haihao Group Supplies 48″ ASTM A105 Blind Flanges to Singapore Energy Project
Haihao Group has successfully delivered a batch of 48-inch 150# ASTM A105 blind flanges in full compliance with ASME B16.47 Series A standards for a key energy project in Singapore. These carbon steel blind flanges were designed and manufactured for high-integrity pipeline systems in the oil, gas, and offshore industries, where safety and reliability are paramount.
Each flange underwent strict quality inspection and certification, backed by EN 10204 3.1 Mill Test Certificates issued under DNV marine class approval. The certificates clearly state compliance with NACE MR0175 / ISO 15156, ensuring suitability for sour service environments. The documentation also includes details on the heat treatment process, specifying the normalizing condition and air cooling medium, guaranteeing consistent mechanical performance and corrosion resistance.
48 inch ASTM A105 ASME B16.47 Series A carbon steel blind flange supplied by Haihao Group
To assure full traceability and conformity, Haihao Group provided comprehensive quality records, including:
- Mill Test Certificates (EN 10204 3.1) – verified by DNV classification society.
- Raw Material MTC – confirming full compliance with ASTM A105 specifications.
- Hardness and Heat Treatment Reports – detailing temperature cycles and cooling media.
- Ultrasonic Testing (UT) Reports – ensuring defect-free integrity and internal soundness.
These RF blind flanges are engineered for sealing large-diameter pipelines in demanding service conditions, offering outstanding strength, durability, and sealing performance. Through precise manufacturing and rigorous testing, Haihao Group continues to deliver high-quality flange solutions that meet international standards and client-specific project requirements.
With decades of expertise in forged flange production, Haihao Group remains a trusted partner for energy, marine, and petrochemical projects worldwide – delivering certified, precision-engineered components with full documentation and quality assurance.