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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
Paper and board--Determination of ash
WITHDRAWN published on 31.3.1989
Selected format:White fuzz goat of liao ning
WITHDRAWN published on 8.8.1984
Selected format:Huyang sheep
WITHDRAWN published on 8.8.1984
Selected format:Determination of moisture-holding capacity of coal
WITHDRAWN published on 17.4.1997
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WITHDRAWN published on 1.1.1984
Selected format:Determination of fluorine in coal
WITHDRAWN published on 17.4.1997
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WITHDRAWN published on 1.1.1984
Selected format:Determination of potassium, sodium, iron, calcium, magnesium and manganese in coal ash by atomic absorption spectrometric method
WITHDRAWN published on 19.12.1996
Selected format:Recording and reproducing head gaps for monophonic and three magnetic sound records on 35mm motion-picture film--Positions and width dimensions
WITHDRAWN published on 1.1.1984
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WITHDRAWN published on 1.1.1984
Selected format:Latest update: 2025-10-14 (Number of items: 2 236 946)
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