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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
Determination of clemulsibility characteristics of turbine oils in service
WITHDRAWN published on 26.3.1987
Selected format:Determination of clemulsibility characteristics of turbine oils in service
WITHDRAWN published on 24.9.2008
Selected format:Oil-changing criterion for machine oil in use
WITHDRAWN published on 1.1.1987
Selected format:-
WITHDRAWN published on 1.1.1987
Selected format:Criteria for change of engine oil used in diesel engine
WITHDRAWN published on 12.6.1995
Selected format:Criteria for change of engine oil used in diesel engine
WITHDRAWN published on 26.11.2002
Selected format:Oil-changing criterion for tractor diesel engine oil in use
WITHDRAWN published on 1.1.1987
Selected format:Total distortion measuring method for PCM channel in the telecommunication network
WITHDRAWN published on 1.1.1987
Selected format:-
WITHDRAWN published on 1.1.1965
Selected format:Characteristics of pulse code modulation for voice-frequencies
WITHDRAWN published on 2.4.1987
Selected format:Latest update: 2026-03-30 (Number of items: 2 269 988)
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