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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
Pyrites and concentrate—Determination of total iron content—Part 2:Titanium trichloride-potassium dichromate volumetric method
WITHDRAWN published on 25.10.1996
Selected format:Geometrical Product Specifications(GPS)—Flatness—Part 1:Vocabulary and parameters of flatness
WITHDRAWN published on 15.11.2009
Selected format:Geometrical Product Specifications (GPS)—Flatness—Part 2:Specification operators
WITHDRAWN published on 15.11.2009
Selected format:Geometrical product specifications(GPS)—Straightness—Part 1:Vocabulary and parameters of straightness
WITHDRAWN published on 15.11.2009
Selected format:Geometrical product specifications(GPS)—Straightness—Part 2:Specification operators
WITHDRAWN published on 15.11.2009
Selected format:Geometrical Product Specifications (GPS)—Roundness—Part 1:Vocabulary and parameters of roundness
WITHDRAWN published on 15.11.2009
Selected format:Geometrical Product Specifications(GPS)—Roundness—Part 2:Specification operators
WITHDRAWN published on 15.11.2009
Selected format:Geometrical product specifications (GPS)—Cylindricity—Part 1:Vocabulary and parameters of cylindrical form
WITHDRAWN published on 15.11.2009
Selected format:Geometrical product specifications(GPS)—Cylindricity—Part 2:Specification operators
WITHDRAWN published on 15.11.2009
Selected format:Geometrical Product Specifications (GPS)—Coordinate measuring machines(CMM):Technique for determining the uncertainty of measurement—Part 3:Use of calibrated workpieces or standards
WITHDRAWN published on 15.11.2009
Selected format:Latest update: 2026-04-02 (Number of items: 2 270 295)
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