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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
In-service quality criteria of turbine oils used in power plants
WITHDRAWN published on 24.9.2008
Selected format:Method of sampling for transformer and turbine oils in electric power industry
WITHDRAWN published on 26.3.1987
Selected format:Determination of water-soluble acid in transformer and turbine oils in service by colormetric method
WITHDRAWN published on 26.3.1987
Selected format:Determination of acid number in transformer and turbine oils in service by BTB method
WITHDRAWN published on 26.3.1987
Selected format:Acoustics-measurement of sound reverberation time in halls-specifications
WITHDRAWN published on 1.1.1984
Selected format:Determination of water content in transformer oils in service by coulometric method
WITHDRAWN published on 26.3.1987
Selected format:Determination of water content in transformer oils in service by gas chromatographic method
WITHDRAWN published on 26.3.1987
Selected format:Determination of T501 oxidation inhibitor content in transformer and turbine oils in service by spectrophotometric method
WITHDRAWN published on 26.3.1987
Selected format:Determination of the aromatic carbon content in mineral insulating oils by infrared spectrum method
WITHDRAWN published on 26.3.1987
Selected format:Determination of the aromatic hydrocarbon content in mineral insulating oils
WITHDRAWN published on 26.3.1987
Selected format:Latest update: 2026-03-30 (Number of items: 2 269 988)
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