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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
Thallium--Determination of indium content--Crystal violet extraction photometric method
WITHDRAWN published on 7.6.1981
Selected format:Thallium--Determination of silicon content--Isoamyl alcohol extraction molybdenum blue absorption photometric method
WITHDRAWN published on 7.6.1981
Selected format:Measurement of fluid flow in closed conduits—Flowrate measurement by means of vortex shedding flowmeters inserted in circular cross-section conduits running full
WITHDRAWN published on 14.1.2011
Selected format:High pure lead--Determination of silver, copper, bismuth, aluminum, nickel, tin, magnesium and iron contents--Spectrochemical method
WITHDRAWN published on 1.1.1981
Selected format:High pure lead--Determination of arsenic content--Arsenic-molybdenum blue photometric method
WITHDRAWN published on 1.1.1981
Selected format:High pure lead--Determination of antimony content--Malachite green photometric method
WITHDRAWN published on 1.1.1981
Selected format:General specification of superalloy master alloys for castings
WITHDRAWN published on 23.12.2010
Selected format:Rubber and plastics machines—Size reduction machines—Part 1:Safety requirements for blade granulators
WITHDRAWN published on 9.3.2012
Selected format:Rubber and plastics machines—Size reduction machines—Part 2:Safety requirements for strand pelletisers
WITHDRAWN published on 9.3.2012
Selected format:Rubber and plastics machines—Size reduction machines—Part 3:Safety requirements for shredders
WITHDRAWN published on 9.3.2012
Selected format:Latest update: 2026-03-29 (Number of items: 2 269 691)
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