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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
Method of test for insulation resistance and volume resistivity of insulating materials at elevatedtemperature
WITHDRAWN published on 22.3.1989
Selected format:Method of test for electrical resistance and resistivity of insulating materials at elevated temperatures
WITHDRAWN published on 15.2.2006
Selected format:Test methods for determining electrolytic corrosion with insulating materials
WITHDRAWN published on 22.3.1989
Selected format:Geological instruction of antimony deposit exploration
WITHDRAWN published on 30.11.1989
Selected format:Application guide for on-load tap-changers
WITHDRAWN published on 22.3.1989
Selected format:Fundamental requirements of excitation systems medium and small synchronous machines
WITHDRAWN published on 22.3.1989
Selected format:Specification for damp heat test chambers
WITHDRAWN published on 22.3.1989
Selected format:Specifications for damp heat testing chambers
WITHDRAWN published on 3.4.2006
Selected format:Specification for salt mist test chambers
WITHDRAWN published on 22.3.1989
Selected format:Specification for mould growth test chambers
WITHDRAWN published on 22.3.1989
Selected format:Latest update: 2026-04-08 (Number of items: 2 271 105)
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