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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
Flange coupling
WITHDRAWN published on 29.4.2003
Selected format:Coupling with rubber type element
WITHDRAWN published on 7.2.1986
Selected format:Coupling with rubber type element
WITHDRAWN published on 13.9.2002
Selected format:Marks for urban public transport—General mark for public transport
WITHDRAWN published on 8.2.1986
Selected format:Urban public transport sign—Part 1:General signs and category signs
WITHDRAWN published on 23.12.2008
Selected format:Marks for urban public transport—Marks for prohibition and general
WITHDRAWN published on 8.2.1986
Selected format:Marks for urban public transport—Stop board of bus and trolleybus and tramcar
WITHDRAWN published on 8.2.1986
Selected format:Marks for urban public transport—Stop board for light rail rapid transit
WITHDRAWN published on 8.2.1986
Selected format:Marks for urbanpublic transport--Line number plate of bus trolley bus and tram
WITHDRAWN published on 22.2.1989
Selected format:Marks for urban public transport—Mark for bus
WITHDRAWN published on 8.2.1986
Selected format:Latest update: 2026-04-28 (Number of items: 2 274 955)
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