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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
Chemical analysis methods of aluminium hydroxide—Determination of ferric oxide content—Orthophenanthroline photometric method
WITHDRAWN published on 3.11.2003
Selected format:Methods for chemical analysis of aluminium hydroxide--The flame photometric method for the determination of sodium oxide content
WITHDRAWN published on 24.7.1986
Selected format:Chemical analysis methods of aluminium hydroxide—Determination of sodium oxide content
WITHDRAWN published on 3.11.2003
Selected format:Terminology for titanium and titanium alloy
WITHDRAWN published on 24.7.1986
Selected format:Terminology and metallographs for titanium and titanium alloys
WITHDRAWN published on 9.6.2008
Selected format:Titanium alloy TA7 sheet and plate for important applications
WITHDRAWN published on 24.7.1986
Selected format:Titanium alloy TC4 sheet and plate for important applications
WITHDRAWN published on 24.7.1986
Selected format:-
WITHDRAWN published on 1.1.1986
Selected format:Titanium and titanium alloy castings
WITHDRAWN published on 9.5.1994
Selected format:Standard method for resistivity of silicon slices with collinear four-probe array measuring
WITHDRAWN published on 1.1.1986
Selected format:Latest update: 2026-06-26 (Number of items: 2 284 409)
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