Haihao Group Supplies ASTM A694 F70 API 6A BX WN Flanges to France
Haihao Group has recently completed the supply of ASTM A694 Grade F70 API 6A BX Weld Neck (WN) Flanges for a French customer involved in high-pressure oil and gas applications. The flanges, sized 18 inches (nominal 16-3/4″), are designed for Class 10,000 PSI service and feature BX-type ring joint (RJ) sealing in full compliance with API 6A specifications.
These components were manufactured with a wall thickness of 31.8 mm and subjected to strict heat treatment and impact testing at -29°C, achieving a minimum energy absorption of 27 Joules, ensuring outstanding performance under extreme low-temperature and high-pressure conditions.
Haihao Group supplies ASTM A694 F70 API 6A BX WN flanges with BX ring joint sealing
Manufactured to Meet API 6A and BX Ring Joint Standards
As part of Haihao’s continuous commitment to quality and reliability, every flange underwent dimensional inspection, material analysis, and ultrasonic testing (UT) to verify compliance with API 6A BX design requirements. The ASTM A694 F70 material offers excellent tensile strength, notch toughness, and pressure containment capability, making it ideal for wellhead equipment, manifolds, and subsea systems.
The BX ring joint sealing face provides a metal-to-metal pressure barrier, delivering leak-proof performance even under repeated pressure cycles-a critical requirement in offshore and onshore production environments.
Quality Control and Material Traceability
Haihao Group ensures every product is traceable through Material Test Certificates (MTCs), heat treatment records, and impact test reports. The complete documentation package complies with EN 10204 3.1 certification, providing full transparency and assurance to international clients.
Our advanced manufacturing process, combined with CNC machining and precision forging technology, guarantees a perfect sealing surface finish and accurate flange dimensions for seamless integration in pressure control systems.
Supporting Global Energy Infrastructure
This shipment demonstrates Haihao Group’s capability to deliver custom-engineered flanges and piping components for complex international projects. With over 40 years of experience in the piping industry, Haihao continues to serve customers in the oil & gas, petrochemical, and energy sectors, providing high-pressure forged flanges and customized pipeline connection solutions that meet the most stringent global standards.
About Haihao Group
Haihao Group is a leading manufacturer and supplier of forged flanges, pipe fittings, and pressure components, certified to standards such as ASME B16.5, API 6A, and EN 1092-1. The company provides complete piping system solutions tailored for offshore platforms, refinery systems, and subsea installations, ensuring quality, reliability, and safety at every step.