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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
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WITHDRAWN published on 1.1.1983
Selected format:Shaped insulating refractory products—Determination of cold crushing strength
WITHDRAWN published on 15.12.1998
Selected format:Crude anthracene
WITHDRAWN published on 12.12.1983
Selected format:Method for the determination of anthracene content of crude anthracene
WITHDRAWN published on 1.1.1983
Selected format:Method for the determination of oil content of crude anthracene
WITHDRAWN published on 1.1.1983
Selected format:-
WITHDRAWN published on 1.1.1973
Selected format:-
WITHDRAWN published on 29.5.1981
Selected format:Coke--Determination of reactivity and strength after reaction
WITHDRAWN published on 1.1.1983
Selected format:Coke—Determination of reactivity and strength after reaction
WITHDRAWN published on 5.4.1996
Selected format:Coke—Determination of reactivity and strength after reaction
WITHDRAWN published on 19.8.2008
Selected format:Latest update: 2025-11-23 (Number of items: 2 247 080)
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