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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
Design code for high voltage electrical installation(3~110kv)
WITHDRAWN published on 19.9.1992
Selected format:Code for design of 66kV or under over-head electrical power transmission line
WITHDRAWN published on 12.11.1997
Selected format:Design code for relaying protection and automatic device of electric power installation
WITHDRAWN published on 1.7.1992
Selected format:Code for design of electrical measuring device of power system
WITHDRAWN published on 1.1.2008
Selected format:Code for fire protection design of garage, motor-repair-shop and parking-area
WITHDRAWN published on 5.10.1997
Selected format:Unified standard for reliability design of building structres
WITHDRAWN published on 13.11.2001
Selected format:24*24 Dot matri*font set of chinese ideograms for information interchange
WITHDRAWN published on 1.1.1985
Selected format:Information technology—Chinese ideogram coded character set(basic set)—24 dot matrix font
WITHDRAWN published on 2.1.2001
Selected format:24*24 Dot matri*font data set of chinese ideograms for information interchange
WITHDRAWN published on 1.1.1985
Selected format:Information technology—Chinese ideogram coded character set (auxiliary set)—24 dot matrix font
WITHDRAWN published on 2.1.2001
Selected format:Latest update: 2026-06-11 (Number of items: 2 281 927)
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