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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
Metal slotting saws with coarse teeth
WITHDRAWN published on 1.1.1985
Selected format:Membrane process sodium hydroxide--Determination of sodium chlorate content--o-Tolidine spectrometric method
WITHDRAWN published on 31.3.1989
Selected format:Membrane process sodium hydroxide--Determination of aluminium oxide content-Spectrometric method
WITHDRAWN published on 31.3.1989
Selected format:Membrane process sodium hydroxide--Determination of calcium contents--Flame atomic absorption method
WITHDRAWN published on 31.3.1989
Selected format:Vulcanized rubber-Determination of metal content--Flame atomic absorption spectrometric method--Part4: Determination of iron content
WITHDRAWN published on 31.3.1989
Selected format:Rubber--Determination of iron content--1,10-Phenanthroline photometric method
WITHDRAWN published on 31.3.1989
Selected format:Vulcanized rubber--Determination of zinc content--EDTA titrimetric method
WITHDRAWN published on 1.1.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Rubber--Determination of thermal conductivity by means of transient hot-wire method
WITHDRAWN published on 31.3.1989
Selected format:Rubber vulcanized—The test method of deterioration surface cracking
WITHDRAWN published on 31.3.1989
Selected format:Latest update: 2025-12-29 (Number of items: 2 253 390)
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