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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
General characteristics complying with the network performance objectives for 300 channel carrier telephone systems on standardized 1.2/4.4mm coaxial cable pairs
WITHDRAWN published on 26.3.1987
Selected format:Methods of chemical analysis of soda-lime-alumina and borosilicate glass--Determination of content of ferrous oxide
WITHDRAWN published on 1.1.1987
Selected format:Methods of chemical analysis of soda-lime-alumina and borosilicate glass--Determination of content of fluorine
WITHDRAWN published on 1.1.1987
Selected format:Methods of chemical analysis of soda-lime-alumina and borosilicate glass--Determination of content of total arsenic
WITHDRAWN published on 1.1.1987
Selected format:FRP Laminates-test method for bearing strength by bolted joints
WITHDRAWN published on 21.3.1987
Selected format:Cylindrical shaft extension for rotating electrical machines
WITHDRAWN published on 6.11.1990
Selected format:Determination of mineral matter in coal
WITHDRAWN published on 1.1.1987
Selected format:-
WITHDRAWN published on 1.1.1987
Selected format:Technical condition of coal for synthetic ammonia
WITHDRAWN published on 8.12.1998
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WITHDRAWN published on 1.1.1987
Selected format:Latest update: 2026-04-01 (Number of items: 2 270 267)
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