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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 liquid penetrant testing and classification of indication for steel castings
WITHDRAWN published on 25.6.1988
Selected format:Penetrant testing for steel castings
WITHDRAWN published on 23.8.2007
Selected format:The methods for magnetic particle testing and for specifying quality levels of steel castings
WITHDRAWN published on 25.6.1988
Selected format:Magnetic particle testing for steel castings
WITHDRAWN published on 23.8.2007
Selected format:Qualification and certification for nondestructive testing personnel
WITHDRAWN published on 23.11.1999
Selected format:Non-destructive testing—Qualification and certification of personnel
WITHDRAWN published on 22.9.2005
Selected format:Non-destructive testing—Qualification and certification of personnel
WITHDRAWN published on 13.5.2008
Selected format:Non-destructive testing—Qualification and certification of NDT personnel
WITHDRAWN published on 10.12.2015
Selected format:Welding—Cold cracking test method using implants
WITHDRAWN published on 25.6.1988
Selected format:Test method for fatigue crack growth rates of welded joints
WITHDRAWN published on 25.6.1988
Selected format:Latest update: 2025-12-24 (Number of items: 2 253 093)
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