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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
Male run tee—Assembly
WITHDRAWN published on 17.6.1983
Selected format:Male run tee—Body
WITHDRAWN published on 17.6.1983
Selected format:Union tee—Assembly
WITHDRAWN published on 17.6.1983
Selected format:Union tee—Body
WITHDRAWN published on 17.6.1983
Selected format:Union cross—Assembly
WITHDRAWN published on 17.6.1983
Selected format:Union cross—Body
WITHDRAWN published on 17.6.1983
Selected format:Weld male connector—Assembly
WITHDRAWN published on 17.6.1983
Selected format:Weld male connector—Body
WITHDRAWN published on 17.6.1983
Selected format:Bulkhead union—Assmbly
WITHDRAWN published on 17.6.1983
Selected format:Bulkhead union—Body
WITHDRAWN published on 17.6.1983
Selected format:Latest update: 2025-12-15 (Number of items: 2 252 206)
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