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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
Standard test method for granular activated carbon from coal--Determination of particle size
Standard published on 3.12.1997
Selected format:Test method for granular activated carbon from coal—Part 20: Determination of pore volume and specific surface area
Standard published on 1.8.2025
Selected format:Test method for granular activated carbon from coal - Determination of hardness
Standard published on 20.11.2008
Selected format:Standard test method for granular activated carbon from coal--Determination of apparent density
Standard published on 3.12.1997
Selected format:Standard test method for granularactivated carbon from coal--Determination of water absorption
Standard published on 3.12.1997
Selected format:Test method for granular activated carbon from coal - Determination of methylene blue adsorption
Standard published on 1.2.2008
Selected format:Test method for granular activated carbon from coal—Part 7 Determination of iodine number
Standard published on 23.5.2023
Selected format:Test method for granular activated carbon from coal - Determination of phenol adsorption
Standard published on 1.2.2008
Selected format:Test method for granular activated carbon from coal - Determination of ignition temperature
Standard published on 1.2.2008
Selected format:Non-destructive testing—Practice for residual stress measurement by X-ray
Standard published on 14.10.2017
Selected format:Latest update: 2026-05-14 (Number of items: 2 277 490)
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