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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
Test procedures for three-phase synchronous machines
WITHDRAWN published on 28.6.1993
Selected format:Test procedures for three-phase synchronous machines
WITHDRAWN published on 26.8.2005
Selected format:Freight containers—Handling and securing in railways
WITHDRAWN published on 30.12.1988
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WITHDRAWN published on 1.1.1988
Selected format:Semiconductor rectifier equipments for telecommunicat-ions
WITHDRAWN published on 1.1.1988
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WITHDRAWN published on 1.1.1988
Selected format:Thermal insulation—Determination of steady-state thermal resistance and related properties—Guarded hot plate apparatus
WITHDRAWN published on 30.12.1988
Selected format:Thermal insulation—Determination of steady-state thermal resistance and related properties—Heat flow meter apparatus
WITHDRAWN published on 30.12.1988
Selected format:Thermal insulation—Determination of steady-state thermal transmission properties—Pipe insulation apparatus
WITHDRAWN published on 30.12.1988
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WITHDRAWN published on 1.1.1988
Selected format:Latest update: 2026-04-10 (Number of items: 2 271 455)
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