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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
Fire hazard testing for electric and electronic products—Part 20:Surface spread of flame—Summary and relevance of test methods
WITHDRAWN published on 31.12.2013
Selected format:Fire hazard testing for electric and electronic products—Part 21:Abnormal heat—Ball pressure test
WITHDRAWN published on 19.12.2006
Selected format:Fire hazard testing for electric and eletronic products—Part 22:Test flames—50W flames—Apparatus and confirmational test methods
WITHDRAWN published on 19.5.2008
Selected format:Fire hazard testing for electric and electronic products—Part 24:Guidance for assessing the fire hazard—Insulating liquids
WITHDRAWN published on 30.12.2008
Selected format:Fire hazard testing for electric and electronic products—Part 25:Smoke obscuration—General guidance
WITHDRAWN published on 30.12.2008
Selected format:Fire hazard testing for electric and electronic products—Part 26:Smoke obscuration—Summary and relevance of test methods
WITHDRAWN published on 30.12.2008
Selected format:Fire hazard testing for electric and electronic products—Part 27:Smoke obscuration—Small-scale static test—Description of the apparatus
WITHDRAWN published on 30.12.2008
Selected format:Fire hazard testing for electric and electronic products—Part 28:Smoke obscuration—Small-scale static test—Materials
WITHDRAWN published on 30.12.2008
Selected format:Fire hazard testing for electric and electronic products—Part 29:Heat release—General guidance
WITHDRAWN published on 30.12.2008
Selected format:Fire hazard testing for electric and electronic products--Guidance for the preparation of requirements and test specifications for assessing fire hazard of electronic compouments
WITHDRAWN published on 26.4.1985
Selected format:Latest update: 2026-08-21 (Number of items: 2 298 377)
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