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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
Non-destructive testing—Ultrasonic testing—Specification for calibration block No.2
WITHDRAWN published on 3.9.2012
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WITHDRAWN published on 1.1.1963
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WITHDRAWN published on 1.1.1988
Selected format:Rated frequency of electrical equipment
WITHDRAWN published on 1.1.1980
Selected format:Standard frequencies
WITHDRAWN published on 19.12.1996
Selected format:Test methods for insulating varnishes containing solvent
WITHDRAWN published on 22.3.1989
Selected format:Varnishes used for eletrical insulation—Part 1:Definitions and general requirements
WITHDRAWN published on 4.2.2004
Selected format:Varnishes used for electrical insulation—Part 2:Methods of test
WITHDRAWN published on 5.6.2003
Selected format:Plastic equipment for water saving irrigation—Drip tape with labyrinth on one side
WITHDRAWN published on 22.6.2005
Selected format:Plastic equipment for water saving irrigation—Pressure compensating emitter and emitting pipe
WITHDRAWN published on 22.6.2005
Selected format:Latest update: 2026-05-04 (Number of items: 2 275 493)
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