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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
Internal combustion engines—Piston rings—Keystone rings and half keystone rings
WITHDRAWN published on 3.3.1993
Selected format:Classification and terminology for machine of hay and forage harvesting
WITHDRAWN published on 3.3.1993
Selected format:Mouldboard plough—Types and parameters
WITHDRAWN published on 3.3.1993
Selected format:Mouldboard plough—Technical requirements
WITHDRAWN published on 3.3.1993
Selected format:Mouldboard plough—Test method
WITHDRAWN published on 3.3.1993
Selected format:Lawn and garden tractors—Three-point hitch
WITHDRAWN published on 3.3.1993
Selected format:Noise limits on platform of subway station
WITHDRAWN published on 6.3.1993
Selected format:Acoustical requirement and measurement on station platform of urban rail transit
WITHDRAWN published on 7.2.2006
Selected format:Measurement for noise on platform of subway station
WITHDRAWN published on 6.3.1993
Selected format:Standard of test method for surface load capacity of gears
WITHDRAWN published on 4.3.1993
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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