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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
Test methods of components and impurities of the manufactured gas
Standard published on 4.11.2008
Selected format:Heat-resistant steel bars
Standard published on 14.5.2007
Selected format:Technical drawings - Dimensions,proportions and simplified representation for welding symbols
Standard published on 11.5.2012
Selected format:Technical drawings for glassware
Standard published on 12.1.1990
Selected format:Silica sand and flour for investment casting
Standard published on 30.8.2019
Selected format:Bauxite sand and flour for investment casting
Standard published on 30.8.2019
Selected format:Machines-Shaft heights
Standard published on 16.5.2005
Selected format:Spring steels
Standard published on 31.10.2025
Selected format:Induatrial valves—Marking
Standard published on 15.5.2015
Selected format:Metal valves—Face to face, end to end, centre to face and centre to end dimensions
Standard published on 31.10.2025
Selected format:Latest update: 2026-06-05 (Number of items: 2 281 463)
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