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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
Semiconductor power convertors—Adjustable speed electric drive systems—General requirements—Part 1:Rating specifications, particularly for d.c. motor drives
WITHDRAWN published on 2.11.2001
Selected format:Ships mushroom ventilators
WITHDRAWN published on 1.1.1983
Selected format:-
WITHDRAWN published on 1.1.1983
Selected format:Ship steel non-opening side scutties
WITHDRAWN published on 1.1.1983
Selected format:Ship steel non-opening rectangular windows
WITHDRAWN published on 1.1.1983
Selected format:Ship steel visor
WITHDRAWN published on 1.1.1983
Selected format:Ship steel vertical ladders
WITHDRAWN published on 1.1.1983
Selected format:Shipbuilding--Deck machinery vocabulary
WITHDRAWN published on 1.1.1983
Selected format:Shipbuilding and marine structures—Deck machinery—Terminology
WITHDRAWN published on 18.5.1998
Selected format:Figurations and symbols on the arrangement plans of ships—Bulkheads, doors, windows and openings on wall, hatches and hatch covers
WITHDRAWN published on 28.10.1983
Selected format:Latest update: 2025-12-05 (Number of items: 2 248 732)
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