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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
Microgrids—Part 3-5 Testing for microgrid monitoring,control,and energy management systems
Standard published on 28.1.2026
Selected format:Plastics—Determination of the effects of exposure to damp heat,water spray and salt mist
Standard published on 29.12.2017
Selected format:Plastics - Unplasticized poly (vinyl chloride) (PVC-U) moulding and extruded materials - Part 1: Designation system and basis for specifications
Standard published on 18.9.2008
Selected format:Plastics - Unplasticized poly (vinyl chloride) (PVC-U) moulding and extruded materials - Part 2: Preparation of test specimens and determination of properties
Standard published on 18.9.2008
Selected format:Sealing strips for plastic doors and windows
Standard published on 25.12.1989
Selected format:Unplasticized polyvinyl chloride(PVC-U) windows - Determination of dimensions
Standard published on 4.8.2008
Selected format:Polyvinyl chloride paste--Determination of apparent viscosity by the Brookfield test method
Standard published on 25.8.2003
Selected format:Determination of limiting viscosity number of polyacrylamide
Standard published on 25.12.1989
Selected format:Determination for molecular weight of polyacrylamide by viscometry
Standard published on 12.12.1992
Selected format:Determination of solid content of polyacrylamide
Standard published on 25.12.1989
Selected format:Latest update: 2026-04-27 (Number of items: 2 274 955)
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