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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
Synchronous belt dirves—Belts with pitch codes—MXL, XXL, XL, L, H, XH and XXH—Synchronous belt dimensions
Standard published on 17.12.2013
Selected format:Lexicography—Basic terminologycommon symbols and Chinese abbreviations
Standard published on 25.4.2025
Selected format:Pipe fittings of copper and copper alloys - Part 1: Fittings of braze welding type
Standard published on 4.8.2008
Selected format:Pipe fittings of copper and copper alloys - Part 2: Fittings of press type
Standard published on 31.12.2008
Selected format:Ships and marine technology - Launching appliances for davit-launched lifeboats
Standard published on 9.3.2009
Selected format:Marine engine room central control console general specification
Standard published on 7.6.2000
Selected format:
General specification of marine engine room central control console
Execute Date: february 2026
Standard published on 1.8.2025
Selected format:Marine A.C. low voltage switchboard general specification
Standard published on 7.6.2000
Selected format:Acetylene cylinders
Standard published on 14.12.2020
Selected format:Seamless aluminum alloy gas cylinders
Standard published on 30.4.2021
Selected format:Latest update: 2025-12-29 (Number of items: 2 253 390)
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