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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
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WITHDRAWN published on 1.1.1988
Selected format:Rubber--Determination of lead content--Dithizone photometric method
WITHDRAWN published on 20.9.1988
Selected format:Rubber—Determination of lead content—Dithizone photomotric method
WITHDRAWN published on 15.10.2002
Selected format:Vulcanized rubber--Determination of metal content--Flame atomic absorption spectrometric method--Part 3: Determination of lead content
WITHDRAWN published on 1.1.1988
Selected format:Vulcanized rubber--Identification of polymers--Chemical method
WITHDRAWN published on 1.1.1988
Selected format:Rubber—Identification of polymers—Chemical method
WITHDRAWN published on 28.8.2001
Selected format:Rubber material for joint rings used in water supply and drainage pipelines
WITHDRAWN published on 1.1.1988
Selected format:Rotary shaft lip seals—Design criteria for standard applications—Part 1:rubber covered rotary shaft lip seals
WITHDRAWN published on 20.9.1988
Selected format:Rotary shaft lip seals—Design criteria for standard applications—Part 2:metal cased rotary shaft lip seals
WITHDRAWN published on 20.9.1988
Selected format:Rotary shaft lip seals—Design criteria for standard applications—Part 3:assembled rotary shaft lip seals
WITHDRAWN published on 20.9.1988
Selected format:Latest update: 2025-12-21 (Number of items: 2 252 887)
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