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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
Ductile iron pipes,fittings and accessories for water or gas applications
WITHDRAWN published on 13.5.2008
Selected format:Ductile iron pipes,fittings and accessories for water or gas applications
WITHDRAWN published on 17.12.2013
Selected format:Seamless stainless steel tubes for boiler and heat exchanger
WITHDRAWN published on 13.12.1991
Selected format:Seamless stainless steel tubes for boiler and heat exchanger
WITHDRAWN published on 9.3.2007
Selected format:Seamless stainless steel tubes for boiler and heat exchanger
WITHDRAWN published on 18.9.2013
Selected format:General rules for packaging, marking and certification of precision alloys
WITHDRAWN published on 13.12.1991
Selected format:Metal—Inspection method of microstructure
WITHDRAWN published on 13.12.1991
Selected format:Steel—Determination of microstructure
WITHDRAWN published on 13.12.1991
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WITHDRAWN published on 1.1.1982
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WITHDRAWN published on 9.11.1987
Selected format:Latest update: 2026-01-22 (Number of items: 2 257 357)
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