This standard was issued by the State Administration for Market Regulation and the National Standardization Administration on March 28, 2025, and came into effect on October 1, 2025. HuaHai Sealing is one of the drafting units.
This document describes three methods for determining the sealing performance of gaskets for pipe flanges: the leakage cavity pressurization method (Method A), the pressure decay method (Method B), and the helium mass spectrometer vacuum leak detection method (Method C).
This document applies to the determination of the sealing performance of non-metallic flat gaskets, spiral-wound gaskets, PTFE-coated gaskets, metal-jacketed gaskets, flexible graphite composite reinforced gaskets, metal serrated combination gaskets, and metal corrugated-toothed composite gaskets. Other types of gaskets may be referenced for implementation.