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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
Nominal torque series of the mechanical coupling
WITHDRAWN published on 23.2.1983
Selected format:Safety of machinery—Local exhaust ventilation system—Safety requirements
WITHDRAWN published on 14.5.2018
Selected format:Metallographic examination standard for the cast aluminum piston for reciprocating internal combustion engine
WITHDRAWN published on 1.1.1983
Selected format:Metallographic examination standard for sleeve cast piston ring of reciprocating internal combustion engine
WITHDRAWN published on 1.1.1983
Selected format:-
WITHDRAWN published on 1.1.1964
Selected format:Metallic materials—Resistivity measurement method
WITHDRAWN published on 11.4.1995
Selected format:Rubber, unvulcanized—Determination of plasticity—Rapid plastimeter method
WITHDRAWN published on 12.12.1992
Selected format:Rubber, unvulcanized—Determination of plasticity—Rapid plastimeter method
WITHDRAWN published on 29.12.2006
Selected format:Rubber, vulcanized--The test method of resistance to natural weathering
WITHDRAWN published on 1.1.1983
Selected format:Rubber, vulcanized and thermoplastic—The test method of resistance to direct natural weathering
WITHDRAWN published on 28.8.2001
Selected format:Latest update: 2025-12-21 (Number of items: 2 252 887)
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