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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
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WITHDRAWN published on 1.1.1989
Selected format:Hand taper 1: 50 pin reamers
WITHDRAWN published on 1.1.1984
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Synchronous belt drives—Pulleys
WITHDRAWN published on 12.6.1989
Selected format:Synchronous belt drives—Trapezoidal toothed pulleys
WITHDRAWN published on 16.4.2008
Selected format:Synchronous belt drives—Calculation of power rating and drive centre distance
WITHDRAWN published on 12.6.1989
Selected format:Synchronous belt drives—Calculation of power rating and drive center distance of trapezoidal toothed synchronous belt
WITHDRAWN published on 16.4.2008
Selected format:Methods of the strength tests for brazed and soldered joint
WITHDRAWN published on 8.5.1989
Selected format:Test method of spread-ability and clearance filling ability for filler metal
WITHDRAWN published on 8.5.1989
Selected format:Accuracy of bevel and hypoid gears
WITHDRAWN published on 6.5.1989
Selected format:Latest update: 2025-12-28 (Number of items: 2 253 436)
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