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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
Rating systems for electronic tubes and semiconductor devices
Standard published on 29.1.1986
Selected format:Marine cast steel flanged stop valves
Standard published on 20.10.2008
Selected format:Liquefied petroleum steel gas cylinders
Standard published on 27.11.2023
Selected format:Flange coupling
Standard published on 28.3.2025
Selected format:Tyre coupling
Standard published on 28.3.2025
Selected format:Marks for urban public transport--Mark for subway
Standard published on 8.2.1986
Selected format:Dimensional chain--Methods of calculation
Standard published on 11.11.2004
Selected format:Blockboards and battenboards
Standard published on 13.10.2016
Selected format:Marine cast steel flanged stop check valves
Standard published on 4.8.2008
Selected format:Wood based panel machinery—General specifications of the hot press
Standard published on 15.3.2024
Selected format:Latest update: 2026-06-25 (Number of items: 2 284 379)
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