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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
Norm of water intake—Part 26:Soda ash
Standard published on 12.5.2017
Selected format:Norm of water intake—Part 27Urea
Standard published on 12.5.2017
Selected format:Norm of water intake—Part 28Sulphuric acid for industrial use
Standard published on 12.5.2017
Selected format:Norm of water intake—Part 29Caustic soda
Standard published on 12.5.2017
Selected format:Norm of water intake—Part 3: Petroleum refining
Standard published on 30.12.2022
Selected format:Norm of water intake—Part 30Coking
Standard published on 1.11.2017
Selected format:Norm of water intake—Part 31 :Sintering and pelletizing for iron and steel industry
Standard published on 1.11.2017
Selected format:Norm of water intake—Part 32Iron ore mineral processing
Standard published on 29.9.2017
Selected format:Norm of water intake—Part 33: Indirect coal liquefaction
Standard published on 14.5.2018
Selected format:Norm of water intake—Part 34: Direct coal liquefaction
Standard published on 14.5.2018
Selected format:Latest update: 2026-09-19 (Number of items: 2 302 332)
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