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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
Surface roughness comparison specimen Part 3Spark-erodedshot-blastedgrit-blastedlappedfiled and polished surface
Standard published on 28.2.2008
Selected format:Geometrical product specifications (GPS) - Surface texture: Profile method - Nominal characteristic of contact(stylus) instruments
Standard published on 16.3.2009
Selected format:Safety rules for lifting appliances - Part 1: General
Standard published on 26.9.2010
Selected format:Safety rules for lifting appliancesPart 5: Bridge and gantry cranes
Standard published on 3.9.2014
Selected format:Test code for truck crane and tyre crane
Standard published on 21.5.2021
Selected format:Roller chain coupling
Standard published on 12.5.2017
Selected format:Vacuum technology—Dimensions of non-knife edge flanges
Standard published on 31.10.2025
Selected format:Ultra-high vacuum flange
Standard published on 29.10.2003
Selected format:Reciprocating internal combustion engines - Performance - Part 1: Declarations of power, fuel and lubricating oil consumptions, and test methods - Additional requirements for engines for general use
Standard published on 3.2.2008
Selected format:Reciprocating internal combustion engines - Performance - Part 3: Test measurements
Standard published on 4.11.2008
Selected format:Latest update: 2026-08-11 (Number of items: 2 292 404)
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