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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
Methods for testing the performance of dust particle counter—Calibration for sizing particle
WITHDRAWN published on 18.6.1985
Selected format:Methods for testing the performance of dust particle counter—Particle concentration
WITHDRAWN published on 18.6.1985
Selected format:Test standard for laminar clean bench
WITHDRAWN published on 1.1.1985
Selected format:Marine fixed rails
WITHDRAWN published on 1.1.1985
Selected format:Chemical reagent General method for the determination of melting range
WITHDRAWN published on 5.9.1988
Selected format:Hexagon nuts,style 1
WITHDRAWN published on 26.9.2000
Selected format:Hexagon nuts,style 1,with fine pitch thread
WITHDRAWN published on 26.9.2000
Selected format:-
WITHDRAWN published on 1.1.1986
Selected format:Hexagon thin nuts(chamfered)
WITHDRAWN published on 26.9.2000
Selected format:Prevailing torque type hexagon thin nuts(with non-metallic insert)
WITHDRAWN published on 26.9.2000
Selected format:Latest update: 2026-06-23 (Number of items: 2 284 357)
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