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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
Accuracy of fine-pitch cylindrical worm and wormwheel
WITHDRAWN published on 22.12.1988
Selected format:-
WITHDRAWN published on 1.1.1988
Selected format:Specification and technical requirements for dry-type power transformers
WITHDRAWN published on 3.7.1997
Selected format:Specification and technical requirements for dry-type power transformers
WITHDRAWN published on 24.4.2008
Selected format:Specification and technical requirements for dry-type power transformers
WITHDRAWN published on 11.9.2015
Selected format:Reactors
WITHDRAWN published on 22.12.1988
Selected format:Lock washers with angular upturn tab perpendicular to the external tab
WITHDRAWN published on 13.10.1976
Selected format:On-load tap-changers
WITHDRAWN published on 22.12.1988
Selected format:Tap-changers—Part 1:Performance requirements and test methods
WITHDRAWN published on 2.7.2007
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WITHDRAWN published on 1.1.1988
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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