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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
Opened-end wrenches for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Chisels for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Inspecting hammers for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Drum plug openers for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Box wrenches for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Sledge hammers for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Ball pein hammers for explosive atmospheres
WITHDRAWN published on 1.1.1989
Selected format:Alkali-resistant lightweight castable
WITHDRAWN published on 1.1.1989
Selected format:Alkali-resistant refractory castable
WITHDRAWN published on 1.1.1989
Selected format:Test method for alkali-resistant of alumina-silica castable refractory
WITHDRAWN published on 1.1.1989
Selected format:Latest update: 2026-04-28 (Number of items: 2 274 955)
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