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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
The terms of carbon materials
WITHDRAWN published on 22.2.1988
Selected format:General rule for packing, marking, storage, transport and quality certificates of carbonaceous material and products
WITHDRAWN published on 11.11.1997
Selected format:General rule for packing,marking,storage,transport and quality certificates of carbonaceous material and products
WITHDRAWN published on 8.7.2009
Selected format:Method for the determination of tensile strength of carbonaceous materials
WITHDRAWN published on 22.2.1988
Selected format:Method for the determination of tensile strength of carbonaceous materials
WITHDRAWN published on 8.7.2009
Selected format:Method for the determination of thermal conductivity of graphite materials at median temperature
WITHDRAWN published on 22.2.1988
Selected format:Method for the determination of thermal conductivity of graphite materials at median temperature
WITHDRAWN published on 13.5.2008
Selected format:Method for determination of coking value of coal pitch
WITHDRAWN published on 22.2.1988
Selected format:Foundry coke
WITHDRAWN published on 22.2.1988
Selected format:Free-cutting steel—Technical requirements
WITHDRAWN published on 22.2.1988
Selected format:Latest update: 2025-08-17 (Number of items: 2 211 709)
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