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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
Trapezoidal screw threads—Part 4: Tolerances
Standard published on 9.3.2022
Selected format:Qinchuan cattle
Standard published on 12.10.2022
Selected format:Rolling bearings—Needle roller bearings with machined rings—Boundary dimensions, geometrical product specifications (GPS) and tolerance values
Standard published on 19.11.2020
Selected format:Files--General technical requirements
Standard published on 27.1.2003
Selected format:Catalysts and absorbents--Determination of surface area
Standard published on 21.12.1995
Selected format:Terminology for building windows and doors
Standard published on 30.7.2008
Selected format:Size system of opening for windows and doors in building
Standard published on 9.3.2021
Selected format:Symbolic designation of direction of opening and closing and faces of doors and windows
Standard published on 31.1.1986
Selected format:
Symbolic designation for opening and closing of building doors, windows and curtain walls
Execute Date: december 2026
Standard published on 25.5.2026
Selected format:Pure xenon,high purity xenon and ultra pure xenon
Standard published on 29.8.2025
Selected format:Latest update: 2026-06-25 (Number of items: 2 284 379)
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