Haihao Group Delivers EN 1092-1 Carbon Steel Flanges for Vietnam Industrial Project
Haihao Group, a leading Chinese manufacturer of carbon steel flanges and piping components, has successfully completed the production and shipment of EN 1092-1 flanges for an industrial project in Vietnam. This delivery includes both Type 01 B1 plate flanges and Type 05 B1 blind flanges, meticulously manufactured according to EN 1092-1 and ASTM A516 Grade 70 standards.
The order was executed under strict quality supervision, ensuring that each flange meets the highest requirements for pressure vessel and piping system applications in power generation, oil & gas, and refinery projects.

EN1092-1 TYPE01 B1 ASTM A516 GR70 DN450 PN16 Blind Flange Manufactured By Haihao Group
Product Overview
The shipment covers a full range of sizes and pressure ratings, including:
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EN1092-1 Type 01 B1 Plate Flanges: DN15–DN450, PN16–PN25
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EN1092-1 Type 05 B1 Blind Flanges: DN25–DN450, PN16
Each flange was precisely machined and dimensionally verified to ensure a perfect fit within the pipeline system. The flanges feature raised face (RF) sealing surfaces, guaranteeing reliable and leak-free connections under high-pressure operating conditions.
Material and Performance Advantages
All products were manufactured from ASTM A516 Grade 70 carbon steel, a material renowned for its excellent toughness, weldability, and mechanical strength.
Its superior performance in high-temperature and high-pressure environments makes it a preferred choice for pressure vessel and energy-sector applications.
The material’s robust characteristics ensure a long service life, reduced maintenance costs, and enhanced safety in demanding field conditions.

ASTM A516 GR70 EN1092-1 Type-01 plate flanges ready for export to Vietnam
Strict Quality Control and Documentation
Before shipment, every flange underwent comprehensive inspection and testing, including:
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Dimensional inspection reports
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Visual and surface examination
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Material test certificates (MTC EN10204 3.1)
All documentation ensures full traceability and adherence to ISO 9001 quality management standards.
Haihao Group’s advanced inspection system guarantees that every EN 1092-1 carbon steel flange meets international expectations for precision, safety, and reliability.
Committed to Excellence in Global Pipeline Projects
Haihao Group has decades of experience in supplying EN 1092-1 flanges, carbon steel fittings, and pipeline components to clients worldwide. With advanced machining facilities, certified testing laboratories, and a professional engineering team, Haihao consistently delivers products that meet both technical and project-specific requirements.