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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 principles of measuring methods of CMOS circuits for semiconductor integrated circuits
WITHDRAWN published on 1.1.1983
Selected format:Families and products of interface circuits for semiconductor integrated circuits
WITHDRAWN published on 1.1.1983
Selected format:Electrical apparatus for explosive gas atmospheres—Part 1:General requirements
WITHDRAWN published on 3.1.2000
Selected format:Explosive atmospheres—Part 1:Equipment—General requirements
WITHDRAWN published on 9.8.2010
Selected format:Electrical apparatus for explosive atmospheres--Hermetically sealed electrical apparatus "h"
WITHDRAWN published on 27.5.1991
Selected format:Electrical apparatus for explosive atmospheres-Method of test for ascertainment of maximum experimental safe gap
WITHDRAWN published on 27.5.1991
Selected format:Explosive atmospheres—Part 11:Equipment protection by flameproof enclosures “d”—Method of test for ascertainment of maximum experimental safe gap
WITHDRAWN published on 29.10.2008
Selected format:Explosive atmospheres—Part 11:Material characteristics for gas and vapour classification—Test methods and data
WITHDRAWN published on 29.12.2017
Selected format:Electrical apparatus for explosive atmospheres—Classification of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting currents
WITHDRAWN published on 27.5.1991
Selected format:Explosive atmospheres—Part 12:Classification of mixtures of gases or vapours with air according to their maximum experimental safe gaps and minimum igniting current
WITHDRAWN published on 29.10.2008
Selected format:Latest update: 2025-12-07 (Number of items: 2 249 258)
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