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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
Determination of isobutylene-isoprene rubber or polyisobutylene content in rubber
Standard published on 12.7.2017
Selected format:Rubber and plastics hoses - Method of test for flammability
Standard published on 14.5.2008
Selected format:Plastics hoses and hose assemblies—Textile-reinforced types for hydraulic applications—Specification
Standard published on 29.8.2025
Selected format:Gas for electronic industry—Silane
Standard published on 31.5.2017
Selected format:High strength low alloy structural steels
Standard published on 14.5.2018
Selected format:Monitoring and testing for energy saving of heat-transmission and distribution system
Standard published on 30.10.2009
Selected format:Monitoring and testing method for energy saving of industrial electroheat devices
Standard published on 30.4.2021
Selected format:Monitoring and testing method for energy conservation of refrigerating systems - Part 1: Cold storage systems
Standard published on 30.10.2009
Selected format:Monitoring and testing for energy saving of fan""s unit and distribute tube system
Standard published on 12.10.2022
Selected format:Monitoring and testing method for energy saving of steam heating equipments
Standard published on 9.3.2021
Selected format:Latest update: 2026-08-21 (Number of items: 2 298 377)
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