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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
Methods of examining micro-structures for heat-resisting superalloys
WITHDRAWN published on 4.4.1994
Selected format:Test methods for superalloys - Part 4: Determination of characterizing banding grains and primary carbides distribution of superalloy rollings
WITHDRAWN published on 5.11.2012
Selected format:Photomicrographs and photomacrographs for evaluating of heat-resisting superalloys
WITHDRAWN published on 4.4.1994
Selected format:Test methods for characterizing duplex grain sizes and primary carbides distribution of superalloy forgings
WITHDRAWN published on 23.12.2010
Selected format:Specifications for the design of water supply and drainage in buildings
WITHDRAWN published on 1.1.1988
Selected format:Cup head nib bolts with large head
WITHDRAWN published on 24.6.1988
Selected format:Steel pressure vessels
WITHDRAWN published on 20.3.1998
Selected format:Pressure vessels—Part 1:General requirements
WITHDRAWN published on 21.11.2011
Selected format:Pressure vessels—Part 2:Materials
WITHDRAWN published on 21.11.2011
Selected format:Pressure vessels—Part 3:Design
WITHDRAWN published on 21.11.2011
Selected format:Latest update: 2026-04-02 (Number of items: 2 270 295)
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