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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
Methods for chemical analysis of lead and lead alloys—Determination of bismuth content
WITHDRAWN published on 28.8.2000
Selected format:Methods for chemical analysis of lead and lead alloys—Determination of arsenic content
WITHDRAWN published on 28.8.2000
Selected format:Methods for chemical analysis of lead and lead alloys—Determination of selenium content
WITHDRAWN published on 28.8.2000
Selected format:Methods for chemical analysis of lead and lead alloys—Determination of telluriun content
WITHDRAWN published on 28.8.2000
Selected format:Methods for chemical analysis of lead and lead alloys—Determination of calcium content
WITHDRAWN published on 28.8.2000
Selected format:Leucoscopic method for testing whiteness of zinc oxide made by direct process
WITHDRAWN published on 1.1.1983
Selected format:Leucoscopic method for testing whiteness of zinc oxide made by direct process
WITHDRAWN published on 3.11.2003
Selected format:Test method for sag of tungsten wire
WITHDRAWN published on 27.12.1983
Selected format:Determination method for secondary recrystallization temperature of tungsten wire
WITHDRAWN published on 27.12.1983
Selected format:Magnesium powders—Determination of apparent density—Scott volumetric method
WITHDRAWN published on 27.12.1983
Selected format:Latest update: 2025-11-10 (Number of items: 2 243 715)
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