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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
Americium-241 sources for X-ray fluorescence analysis
WITHDRAWN published on 1.1.1989
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WITHDRAWN published on 1.1.1989
Selected format:Metallographic examination for weld seam of nuclear fuel rod used in PWR
WITHDRAWN published on 20.3.1998
Selected format:Test method of weld of fuel rod for PWR—Metallographic examination and radiographic testing
WITHDRAWN published on 2.7.2008
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WITHDRAWN published on 1.1.1974
Selected format:Medical indium-113m radionuclide generator
WITHDRAWN published on 21.11.1989
Selected format:Gaseous helium-3
WITHDRAWN published on 1.1.1989
Selected format:Tritiated radioluminescent compounds
WITHDRAWN published on 1.1.1989
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WITHDRAWN published on 1.1.1989
Selected format:Helium leak testing of nuclear fuel rod for PWR
WITHDRAWN published on 19.12.1996
Selected format:Latest update: 2025-11-12 (Number of items: 2 243 625)
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