This document specifies the design, material and structural requirements, ex-factory tests, type tests, determination of discharge, calculation of rated displacement and flow area, as well as marking and sealing of pilot operated safety valves. This document applies to pilot operated safety valves with set pressure not less than 0.1 MPa and flow channel diameter not less than 4 mm.
Basic Data
Standard ID
GB/T 28778-2023 (GB/T28778-2023)
Description (Translated English)
Pilot operated safety valves
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
J16
Classification of International Standard
13.240
Word Count Estimation
18,184
Date of Issue
2023-09-07
Date of Implementation
2024-04-01
Older Standard (superseded by this standard)
GB/T 28778-2012
Issuing agency(ies)
State Administration for Market Regulation, China National Standardization Administration
