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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
Terminology for the mechanism and machine science
Standard published on 19.6.2008
Selected format:Inverted tooth(silent) chains and sprockets
Standard published on 24.2.2016
Selected format:Double turbine torque converterSpecification
Standard published on 19.7.2006
Selected format:Steel roller chains,types S and C,attachments and sprockets
Standard published on 19.9.2005
Selected format:Wire electrodes,wires and rods for welding of aluminium and aluminium alloys
Standard published on 7.9.2023
Selected format:Nickel base brazing filler metals—Part 1Solid brazing filler metals
Standard published on 28.3.2025
Selected format:Thermal test method for gas pass heat recovery boiler
Standard published on 30.12.2011
Selected format:Steam converting valves for power station
Standard published on 6.2.2018
Selected format:Control valves for power station
Standard published on 31.1.2008
Selected format:The methods of performance test for water chilling (heat pump) packages using the vaper compression cycle
Standard published on 24.6.2014
Selected format:Latest update: 2026-04-21 (Number of items: 2 274 412)
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