Production Standard：ASME B16.5, ASME B16.47, EN 1092-1 Type 01, DIN 2573~2576, ISO 7005-1, JIS B2220, GOST 12820-80, API 6A, AS/NZS 4087, GB/T 9124.1-2019.
The sealing surface of threaded flanges determines the sealing effect! Flat face (FF) sealing surface is easy to process, only needing milling to be flat, suitable for low-pressure, non-viscous media (such as clean water); raised face (RF) sealing surface needs to be turned with a raised platform, used with gaskets (e.g., rubber gaskets, asbestos gaskets), suitable for medium-low pressure oil and gas pipelines; after processing, the sealing surface roughness must be ≤Ra3.2μm to avoid medium leakage.Key Process：Sealing surface flatness detection with a laser measuring instrument.
