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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
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WITHDRAWN published on 1.1.1987
Selected format:Test method for pyrometric cone equivalent(refractoriness) of refractories
WITHDRAWN published on 11.11.1997
Selected format:Refractory products—Determination of pyrometric cone equivalent (refractoriness)
WITHDRAWN published on 25.10.2007
Selected format:Extreme pressure lithium lubricating grease
WITHDRAWN published on 23.8.1994
Selected format:Extreme pressure lithium lubricating grease
WITHDRAWN published on 23.6.2008
Selected format:General purpose lithium lubricating grease
WITHDRAWN published on 23.8.1994
Selected format:Silicon carbide surge arresters for A.C.systems
WITHDRAWN published on 2.3.1987
Selected format:Silicon carbide surge arresters for a.c.systems
WITHDRAWN published on 18.6.2008
Selected format:Determination of transformer and reactor sound levels
WITHDRAWN published on 2.3.1987
Selected format:Coupling devices for power line carrier systems
WITHDRAWN published on 1.1.1987
Selected format:Latest update: 2026-04-02 (Number of items: 2 270 295)
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