DN80Stainless Steel Flange

The DN80 (3-inch) stainless steel flange is an industrial piping connection component conforming to international standards such as ASME, EN, and JIS, used to achieve bolt-sealed connections between pipes, valves, and pressure equipment. This product is primarily used in medium- and high-pressure and corrosive media transportation systems, such as those in petrochemical, marine engineering, water treatment, and energy industry piping networks. 

Industrial-Grade Pressure-Bearing Structure: Manufactured using forging or precision casting processes, the structure is stable and meets Class 150–600 and PN10–PN40 pressure rating requirements. Suitable for conventional high-pressure pipeline and equipment connection scenarios, it can operate stably for extended periods within its design range.

Multiple International Standards Compatible: Products can be manufactured according to ASME B16.5, EN 1092-1, and JIS B2220 standards, meeting the engineering design specifications of different regions and facilitating standardization in global procurement and system integration for EPC projects.

Stainless Steel Material System: Utilizes standard stainless steel materials such as ASTM A182 F304 / F316 / F316L, suitable for general acid and alkaline environments, seawater environments, and industrial gas transmission systems.

Standard Sealing Surface Machining: Sealing surfaces are CNC machined, providing standard forms such as RF, FF, and RTJ. Surface roughness is controlled within engineering standard ranges, allowing for use with standard gaskets to meet the sealing requirements of industrial systems.

Products are manufactured under the ISO 9001 quality management system and comply with ASME and EN standards for pressure equipment. Each batch of products comes with a Material Certificate (MTC) conforming to EN 10204 3.1, and a third-party witness certificate (3.2) can be provided upon customer request.

The quality control process includes:

Raw material chemical composition testing (PMI)

Critical process dimensional inspection (in-process inspection)

Full inspection of finished product dimensions and appearance

Hydrostatic testing when necessary

Support for third-party inspections such as SGS, BV, and TÜV

Products support heat number traceability, enabling quality tracking from raw materials to finished products.

Suitable for common industrial fluid systems, including:

Oil and gas pipeline systems (Onshore/Offshore piping)

Chemical and process industry equipment connections

Water treatment and desalination systems

Power and energy engineering auxiliary piping networks

Industrial steam and general pressure piping systems