Engineered for High-Pressure Energy Grids: Haihao Group Delivers ASTM A694 F65 Flanges to the UAE

Haihao Group has completed the production and dispatch of a critical shipment of high-yield carbon steel flanges for an offshore-linked pipeline project in the United Arab Emirates (UAE). The shipment consists of large-diameter Weld Neck (WN) and Blind flanges designed for high-stress, high-pressure environments. Engineered to meet strict chemical and mechanical parameters, these components ensure long-term integrity in harsh desert and coastal conditions.

Project Order Specification Manifest

As a certified ASTM A694 F65 flange supplier, Haihao Group manufactured every item according to precise dimensional and pressure rating standards:

18″ WN Flange RF: Class 600, STD Wall Thickness | Standard: ASME B16.5 | Material: ASTM A694 Grade F65 | Finish: Black Paint.

18″ Blind Flange RF: Class 600 | Standard: ASME B16.5 | Material: ASTM A694 Grade F65 | Finish: Black Paint.

28″ WN Flange RF: Class 600, 14.27mm Wall Thickness | Standard: ASME B16.47 Series A | Material: ASTM A694 Grade F65 | Finish: Black Paint.

28″ Blind Flange RF: Class 600 | Standard: ASME B16.47 Series A | Material: ASTM A694 Grade F65 | Finish: Black Paint.

ASTM A694 GRF65 weld neck flanges and blind flanges manufactured by Haihao Group

Metallurgical Purity & Sub-Zero Impact Performance

High-yield flanges installed in major Middle Eastern energy infrastructure require clean chemical compositions to prevent stress corrosion cracking and hydrogen-induced damage. To satisfy the UAE client’s project specifications, the ASTM A694 F65 forged steel underwent refined ladle metallurgy:

Sulfur (S) Content: Controlled strictly below 0.025%.

Phosphorus (P) Content: Controlled strictly below 0.015%.

Following forging, all flanges underwent standardized Normalizing and Tempering heat treatments to achieve optimal grain refinement and mechanical properties. To verify toughness under operating thermal fluctuations, Charpy V-Notch impact testing was conducted at -46°C, achieving an average impact energy of ≥27J (with a single minimum value of ≥20J).

Quality Assurance & Packaging Protocols

Every flange was subjected to 100% dimensional verification, non-destructive testing, and surface preparation. As a trusted ASTM A694 F65 flange supplier, our export workflow included:

Application of protective heavy-duty black anti-corrosion paint across unmachined surfaces.

Precision lathe finishing on Raised Face (RF) serrations to guarantee optimal gasket seating.

Plastic protective end covers fitted to prevent flange face scoring during sea freight transit.

Full EN 10204 3.1 certification detailing heat numbers, mechanical yield strengths, and -46°C impact test values.

Global EPC contractors seeking heavy-wall, high-yield forgings depend on an experienced ASTM A694 F65 flange supplier like Haihao Group for full compliance with international standards. Contact our technical engineering division today to submit your project inquiries or request drawing reviews.