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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
Prevailing torque type hexagon nuts (with non-metallic insert), style 1—Fine pitch thread
Standard published on 24.2.2016
Selected format:Seamless copper alloy tube for condenser and heat-exchanger
Standard published on 11.9.2015
Selected format:Copper and copper alloy tube for heat radiator
Standard published on 31.10.2025
Selected format:Bronze tube for pressure-gauge
Standard published on 29.2.1988
Selected format:Copper alloy tube for pressure gauge
Standard published on 27.3.2014
Selected format:Copper and copper-alloy waveguide tube
Standard published on 24.7.2014
Selected format:Primary batteries—Part 1General
Standard published on 21.5.2021
Selected format:Primary batteries—Part 2:Physical and electrical specifications
Standard published on 21.5.2021
Selected format:Primary batteries—Part 3: Watch batteries
Standard published on 21.5.2021
Selected format:Primary batteries - Part 4: Safety of lithium batteries
Standard published on 30.12.2008
Selected format:Latest update: 2026-06-14 (Number of items: 2 282 206)
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