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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
Multimode optical fibres for telecommunication—Part 1: Sectional specification for category A1 multimode fibres
Standard published on 31.12.2024
Selected format:Multimode optical fibres fortelecommunication--Part 2:Sectional specification for category A2 multimode fibres
Standard published on 8.6.2004
Selected format:Multimode optical fibres fortelecommunication--Part 3:Sectional specification for category A3 multimode fibres
Standard published on 8.6.2004
Selected format:Multimode optical fibres for telcommunication—Part 4: Sectional specification for category A4 multimode fibres
Standard published on 25.4.2016
Selected format:Gas detection and alarm instruments for workplace—General technical requirements
Standard published on 28.11.2024
Selected format:Metric trapezoidal screw threads - Limits of sizes
Standard published on 30.7.2008
Selected format:Industrial fan—Performance testing using standardized airways
Standard published on 1.11.2017
Selected format:Geometrical Product Specifications(GPS) Cone fit
Standard published on 16.5.2005
Selected format:Steel die forgings—General specification
Standard published on 13.12.2016
Selected format:Steel die forgings—Tolerance and machining allowance
Standard published on 13.12.2016
Selected format:Latest update: 2026-01-02 (Number of items: 2 253 797)
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