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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
Requirements for facsimile apparatus--Group 2 document facsimile apparatus
WITHDRAWN published on 1.1.1988
Selected format:Specifications for the design of industrial circulating water cooling
WITHDRAWN published on 1.1.1987
Selected format:Test methods for electro-slag remelting furnaces
WITHDRAWN published on 22.3.1989
Selected format:Helical-scan video cassette system using 19mm tape (U-matic H format)
WITHDRAWN published on 22.12.1988
Selected format:Guides for the rationality of electricity usage in heat treatment
WITHDRAWN published on 22.12.1988
Selected format:Test method for exudating temperature of glass phase of refractory for glass melting furnace
WITHDRAWN published on 1.1.1988
Selected format:Method for static test for corrasion resistance of refractories of glass melting furnace to melten glass
WITHDRAWN published on 1.1.1988
Selected format:Monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 26.7.2001
Selected format:Slurry concentration process monoammonium phosphate
WITHDRAWN published on 1.1.1988
Selected format:The determination of available phosphous content for monoammonium phosphate and diammonium phosphate
WITHDRAWN published on 1.1.1988
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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