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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
One-side welded bed plate for flanges in marine
WITHDRAWN published on 30.6.1994
Selected format:Welded bed plate for flanges of ship pipe
WITHDRAWN published on 20.10.2008
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Double face welded bed plate for flanges in marine
WITHDRAWN published on 30.6.1994
Selected format:Deck drain
WITHDRAWN published on 1.1.1989
Selected format:-
WITHDRAWN published on 1.1.1989
Selected format:Marine cast steel erect check valves
WITHDRAWN published on 28.3.1996
Selected format:Sea-going merchant ships--Classification of main general performance level
WITHDRAWN published on 1.1.1989
Selected format:Metal valves for use in marine flanged pipe systems—Face-to-face and centre-to-face dimensions
WITHDRAWN published on 14.10.1989
Selected format:Small craft--Inboard engine-propeller shaft ends and bosses
WITHDRAWN published on 1.1.1989
Selected format:Latest update: 2026-01-23 (Number of items: 2 257 393)
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