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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
Woodruff keyways
Standard published on 5.6.2003
Selected format:Optical systems--Determination of distortion
Standard published on 10.3.1989
Selected format:Optical systems - Determination of parameters
Standard published on 30.9.2009
Selected format:Veiling glare of optical systems - Methods of measurement
Standard published on 30.9.2009
Selected format:Woodruff keys--Normal form
Standard published on 29.4.2003
Selected format:Engineering electrostatic copiers
Standard published on 9.3.2022
Selected format:Countersunk head nib bolts
Standard published on 9.6.2013
Selected format:Radio frequency identification(RFID) of stationary lead acid cells and monoblocs—Tentative requirements
Standard published on 3.12.2025
Selected format:Test method of electrolytic conductivity analyzers
Standard published on 30.6.2008
Selected format:Spectrum standard solar cell
Standard published on 31.3.1989
Selected format:Latest update: 2026-04-22 (Number of items: 2 274 512)
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