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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
Gauges for straight-sided splines
Standard published on 11.10.2021
Selected format:Types and dimensions of screw thread gauge and plain limit gauge
Standard published on 12.11.2008
Selected format:Gauges for pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads
Standard published on 5.2.2006
Selected format:Test code of accuracy for metalforming machine
Standard published on 16.3.2009
Selected format:Straight sided single or two - Point mechanical power presses - Testing of the accuracy
Standard published on 2.4.2009
Selected format:Screw thread micrometer
Standard published on 25.4.2024
Selected format:Rotary mowers
Standard published on 3.6.2008
Selected format:Power transformers—Part 1:General
Standard published on 17.12.2013
Selected format:Power transformers— Part 10Determination of sound levels
Standard published on 12.10.2022
Selected format:Power transformers—Part 101: Determination of sound levels—Application guide
Standard published on 17.3.2023
Selected format:Latest update: 2025-08-25 (Number of items: 2 213 294)
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