This standard was issued by the State Administration for Market Regulation and the National Standardization Administration on September 7, 2023, and came into effect on April 1, 2024. HuaHai Sealing is one of the drafting units.
This document specifies the types and codes, dimensions, materials and manufacturing, requirements, test methods, inspection rules, as well as marking, labeling, packaging, and storage of metal ring gaskets for PN marked steel pipe flanges.
This document applies to metallic ring joint gaskets for ring-type joint facings on steel pipe flanges with nominal pressures from PN 63 to PN 400 as specified in GB/T 9124.1.