GB/T 46627-2025 Active
GB/T 46627-2025 Standard test methods for sealability of gaskets at elevated temperature for pipe flanges
Abstract
This document describes the test methods for the sealing performance of pipe flange gaskets at specified temperatures, including 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 sealing performance of circular gaskets used in pipe flanges under test temperatures not exceeding 900 °C and medium pressures not exceeding 10 MPa. The types of gaskets include non-metallic flat gaskets, wrapped gaskets, PTFE-coated gaskets, metal-coated gaskets, flexible graphite composite reinforced gaskets, metal toothed composite gaskets, and metal wave-toothed composite gaskets. Other types of gaskets should be referenced for implementation.
General Product Information
| Document Type | National standards |
|---|---|
| Standard Status | Active |
| Standard Code | GB/T 46627-2025 |
| CCS | Piping accessories |
| ICS | Flanges, pipe joints, and connectors |
| Implement Date | 2026-05-01 |