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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
Measuring method for polarization dependence of return loss of a single-mode fibre optic component
Standard published on 9.9.1996
Selected format:General specification for porous ceramic products
Standard published on 13.9.1996
Selected format:Fine ceramicsadvanced ceramics,advanced technical ceramics- Test method for hardness of monolithic ceramics at room temperature
Standard published on 13.5.2009
Selected format:Fine ceramics (advanced ceramics, advanced technical ceramics) - Test method for linear thermal expansion of monolithic ceramics by push-rod technique
Standard published on 18.9.2008
Selected format:Test method for thermal shock resistance of high performance ceramics
Standard published on 13.9.1996
Selected format:Chemical analysis methods of fritted glaze for ceramics
Standard published on 2.9.2010
Selected format:Acoustics - Determination of sound power levels of noise sources using sound pressure - Comparison method in situ
Standard published on 2.7.2008
Selected format:Acoustics--Determination of sound power levels of noise sources using vibration velocity--Measurement for seal machinery
Standard published on 9.9.1996
Selected format:Acoustics--Measurement and characterisation of ultrasonic fields in the frequency range 0.5MHz to 15MHz--Hydrophone method
Standard published on 9.9.1996
Selected format:Shaft cage hoisting signal system - safety technical requirements
Standard published on 1.12.2010
Selected format:Latest update: 2026-06-14 (Number of items: 2 282 206)
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