We need your consent to use the individual data so that you can see information about your interests, among other things. Click "OK" to give your consent.
Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Safety valves—General requirements
Standard published on 9.3.2021
Selected format:Pressure relief devices—Performance test code
Standard published on 9.3.2021
Selected format:Spring loaded safety valves
Standard published on 30.4.2021
Selected format:General requirements for pressure reducing valves
Standard published on 25.12.2006
Selected format:
Pressure reducing valves—General requirements
Execute Date: may 2026
Standard published on 5.10.2025
Selected format:Methods of performance test for pressure reducing valves
Standard published on 25.12.2006
Selected format:
Methods of performance test for pressure reducing valves
Execute Date: may 2026
Standard published on 31.10.2025
Selected format:Pilot operated pressure reducing valves
Standard published on 25.12.2006
Selected format:
Pilot operated pressure reducing valves
Execute Date: may 2026
Standard published on 31.10.2025
Selected format:Automatic steam traps—Classification
Standard published on 10.12.2015
Selected format:Latest update: 2026-04-28 (Number of items: 2 274 955)
© Copyright 2026 NORMSERVIS s.r.o.