This document describes three methods for determining the sealability of gaskets used for pipe flanges. the leak detection cavity pressurization method (Method A), the pressure drop method (Method B) and the helium mass spectrometry vacuum leak detection method (Method C). This document is applicable to the determination of the sealability of non-metallic flat gaskets, spiral wound gaskets, polytetrafluoroethylene coated gaskets, metal coated gaskets, flexible graphite composite reinforced gaskets, metal toothed combination gaskets and metal corrugated composite gaskets. Other types of gaskets may take this as a reference.
Basic Data
Standard ID
GB/T 12385-2025 (GB/T12385-2025)
Description (Translated English)
Standard test methods for sealability of gaskets for pipe flanges
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
J15
Classification of International Standard
23.040.60
Word Count Estimation
14,119
Date of Issue
2025-03-28
Date of Implementation
2025-10-01
Older Standard (superseded by this standard)
GB/T 12385-2008
Issuing agency(ies)
State Administration for Market Regulation, China National Standardization Administration
