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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
Machine reamers with edge inclination Morse taper shanks
WITHDRAWN published on 6.12.1973
Selected format:Machine reamers with edge inclination with Morse taper shanks
WITHDRAWN published on 10.2.2004
Selected format:Motor vehicles--Crankcase emissions--Measurement methods and limit
WITHDRAWN published on 1.1.1989
Selected format:Safety rules for overhead chain conveyers
WITHDRAWN published on 23.6.1989
Selected format:Standard for examination of the safety techniques for operators of motor vehicles in mines and factories
WITHDRAWN published on 23.6.1989
Selected format:Ultrasonic angle beam examination by the contact method
WITHDRAWN published on 8.5.1989
Selected format:Measuring thickness by ultrasonic pulse-echo contact method
WITHDRAWN published on 8.5.1989
Selected format:Non-destructive testing—Practice for measuring thickness by ultrasonic pulse-echo contact method
WITHDRAWN published on 30.7.2008
Selected format:Method for manual ultrasonic testing and classification of testing results for ferritic steel welds
WITHDRAWN published on 8.5.1989
Selected format:Non-destructive testing of welds—Ultrasonic testing—Techniques,testing levels,and assessment
WITHDRAWN published on 18.9.2013
Selected format:Latest update: 2026-01-23 (Number of items: 2 257 393)
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