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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
Paints and varnishes--Determination of “soluble” metal content--Part 4:Determination of cadmium content--Flame atomic absorption spectrometric method and polarographic method
Standard published on 5.9.1988
Selected format:Paints and varnishes--Determination of “soluble” metal content--Part 5:Determination of hexavalent chromium content of the pigment portion of the liquid paint or the paint in powder form--Diphenylcarbazide spectrophotometric method
Standard published on 5.9.1988
Selected format:Paints and varnishes--Determination of “soluble” metal content--Part 6:Determination of total chromium content of the liquid portion of the paint--Flame atomic absorption spectrometric method
Standard published on 5.9.1988
Selected format:Paints and varnishes--Determination of “soluble” metal content--Part 7:Determination of mercury content of the pigment portion of the paint and of the liquid portion of water-dilutable paints--Flameless atomic absorption spectrometric method
Standard published on 5.9.1988
Selected format:Paints and varnishes--Preparation of acid extracts from paints in liquid or powder form
Standard published on 5.9.1988
Selected format:Paints and varnishes - Visual comparison of the colour of paints
Standard published on 14.5.2008
Selected format:Tyre valve core chambers
Standard published on 28.12.2018
Selected format:Tyre valve threads
Standard published on 15.12.2009
Selected format:Test method for tyre valves—Part 1: Test method for tube clamp-in valves
Standard published on 31.12.2015
Selected format:Test method for tyre valves—Part 2Rubber base valves test method
Standard published on 29.9.2024
Selected format:Latest update: 2026-04-16 (Number of items: 2 272 849)
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