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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
Industrial circulating cooling water—Determination of the chemical oxygen demand—Potassium permanganate method
WITHDRAWN published on 1.4.2008
Selected format:Method for determining lubrication of photographic film and film base
WITHDRAWN published on 12.1.1995
Selected format:Determination of the index of abrasion of coal
WITHDRAWN published on 12.1.1995
Selected format:Determination of shatter strength of coal
WITHDRAWN published on 12.1.1995
Selected format:Pulps—Determination of Kappa number
WITHDRAWN published on 29.4.1979
Selected format:Pulps-Determination of Kappa number
WITHDRAWN published on 15.3.2004
Selected format:Determination of Carbon and hydrogen in coal-Electric quantity and weighting method
WITHDRAWN published on 12.1.1995
Selected format:Determination of carbon and hydrogen in coal—Coulometric and gravimetric method
WITHDRAWN published on 1.7.2003
Selected format:Electrostatic safety terminology
WITHDRAWN published on 19.1.1995
Selected format:Electrostatic safety terminology
WITHDRAWN published on 19.6.2008
Selected format:Latest update: 2026-03-27 (Number of items: 2 269 573)
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