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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
Rock drilling machines and pneumatic tools —Safety requirements
WITHDRAWN published on 31.8.2005
Selected format:Tyre valve
WITHDRAWN published on 2.12.1996
Selected format:Tyre valves—Part 1:Clamp-in valves
WITHDRAWN published on 18.9.2008
Selected format:Tyre valves—Part 2:Rubber base valves
WITHDRAWN published on 18.9.2008
Selected format:Tyre valves—Part 2: Rubber base valves
WITHDRAWN published on 24.2.2016
Selected format:Tyre valves—Part 3:Snap-in valves
WITHDRAWN published on 18.9.2008
Selected format:Tyre valves—Part 4:Clamp-in valves
WITHDRAWN published on 15.12.2009
Selected format:Tyre valves—Part 5:Tyre valves for large core chamber
WITHDRAWN published on 15.12.2009
Selected format:Tyre valves—Part 6:Cores
WITHDRAWN published on 18.9.2008
Selected format:Tyre valves—Part 7:Components
WITHDRAWN published on 15.12.2009
Selected format:Latest update: 2025-09-10 (Number of items: 2 232 034)
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