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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
Double wall copper-brazed steel tubing
WITHDRAWN published on 31.3.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Standard practice for fabrication and control of steel reference blocks used in ultrasonic inspection
WITHDRAWN published on 1.11.1999
Selected format:Non-destructive testing—Practice for fabrication and control of steel reference blocks used in ultrasonic testing
WITHDRAWN published on 30.7.2008
Selected format:T-slot cutter with morse taper shank
WITHDRAWN published on 1.1.1985
Selected format:Cold-drawn round steel--Pass type eddy current testing method
WITHDRAWN published on 1.1.1989
Selected format:Round steel—The inspection method for pass type eddy current test
WITHDRAWN published on 27.9.1996
Selected format:Round steel—The inspection method for eddy current test
WITHDRAWN published on 10.10.2008
Selected format:Methods for chemical analysis of high carbon chromium bearing steel The pulse heating inert gas fusion-infra red absorption method for the determination of oxygen content
WITHDRAWN published on 31.3.1989
Selected format:Hot rolled section for automobile wheel felloe
WITHDRAWN published on 1.1.1989
Selected format:Latest update: 2026-01-25 (Number of items: 2 257 482)
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