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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
Electrical apparatus for explosive gas atmospheres—Part 13:Repair and overhaul for apparatus used in explosive gas atmospheres
WITHDRAWN published on 30.12.1997
Selected format:Explosive atmospheres—Part 13:Equipment repair,overhaul and reclamation
WITHDRAWN published on 17.12.2013
Selected format:Electrical apparatus for explosive gas atmospheres—Part 14:Classification of hazardous areas
WITHDRAWN published on 17.10.2000
Selected format:Electrical apparatus for explosive gas atmospheres—Part 15:Electrical installations in hazardous areas (other than mines)
WITHDRAWN published on 17.10.2000
Selected format:Explosive atmospheres—Part 15: Electrical installations design, selection and erection
WITHDRAWN published on 29.12.2017
Selected format:Electrical apparatus for explosive gas atmospheres—Part 16:Inspection and maintenance of electrical installation(other than mines)
WITHDRAWN published on 30.4.2006
Selected format:Explosive atmospheres—Part 16:Electrical installations inspection and maintenance
WITHDRAWN published on 29.12.2017
Selected format:Explosive atmospheres—Part 16: Electrical installations inspection and maintenance
WITHDRAWN published on 12.10.2022
Selected format:Electrical apparatus for explosive gas atmosphere—Part 17:Construction and use of rooms or buildings protected by pressurization
WITHDRAWN published on 30.4.2007
Selected format:Explosive atmospheres—Part 18:Intrinsically safe system
WITHDRAWN published on 9.8.2010
Selected format:Latest update: 2025-12-05 (Number of items: 2 248 732)
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