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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
Gears—Calculation of load capacity of worm gears
Standard published on 3.12.2025
Selected format:Internal combustion engines - Cast iron wet cylinder liners - Specifications
Standard published on 10.11.2010
Selected format:Internal combustion engines—Cast iron wet cylinder liners—Specifications
Standard published on 10.11.2010
Selected format:Photography - Density Measurement - Part 2Geometric conditions for transmission density
Standard published on 18.6.2008
Selected format:Internal combustion engines—Main and connecting rod bearings—Specifications
Standard published on 23.5.2023
Selected format:Standard for logarithmic visual acuity charts
Standard published on 30.12.2011
Selected format:Essential oil - Analysis by gas chromatography on capillary columns - General method
Standard published on 31.3.2006
Selected format:Fragrance/Flavor substances - Analysis by gas chromatography on packed columns - General method
Standard published on 15.7.2008
Selected format:Fragrance/Flavor substances - Determination of relative density
Standard published on 15.7.2008
Selected format:Photographic base paper
Standard published on 19.8.2008
Selected format:Latest update: 2026-08-26 (Number of items: 2 298 418)
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