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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
Broadcast video tape recorders—Methods of measurement—Part 2:Electrical measurements of analogue composite video signals
WITHDRAWN published on 26.2.1999
Selected format:Outline for the digital topographic map products
WITHDRAWN published on 20.3.1998
Selected format:Criteria for safe design of wet source storage gamma irradiators
WITHDRAWN published on 20.3.1998
Selected format:Methods of test for drying time of coatingsof paints and putties
WITHDRAWN published on 15.9.1979
Selected format:Standard test method for distillation of crude petroleum
WITHDRAWN published on 20.3.1998
Selected format:Standard test method for distillation of crude petroleum—15-Theoretical plate column
WITHDRAWN published on 8.4.2009
Selected format:Natural gas—Determination of hydrocarbons from butane(C4) to hexadecane(C16)—Gas chromatographic method
WITHDRAWN published on 20.3.1998
Selected format:Method for estimation of molecular weight (Relative molecular mass) of petroleum oils from viscosity measurements
WITHDRAWN published on 20.3.1998
Selected format:Determination of the water dew point of natural gas—Cooled surface condensation hygrometers
WITHDRAWN published on 20.3.1998
Selected format:Determination of the water dew point of natural gasCooled surface condensation hygrometer
WITHDRAWN published on 5.12.2014
Selected format:Latest update: 2026-08-09 (Number of items: 2 292 444)
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