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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
Crosslinked polyethylene(PE-X) piping systems for hot and cold water installations--Part 2: Pipes
Standard published on 5.3.2003
Selected format:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 1General
Standard published on 19.11.2020
Selected format:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 2Pipes
Standard published on 19.11.2020
Selected format:Chlorinated poly (vinyl chloride) (PVC-C) piping systems for hot and cold water installations—Part 3Fittings
Standard published on 19.11.2020
Selected format:Chlorinated poly (vinyl chloride) PVC-Cpiping systems for hot and cold water installations—Part 5Fitness for the purpose of system
Standard published on 19.11.2020
Selected format:Cinematography--Manufacturer-printedlatent image identification on 16mm35mm and 65mm motion-picture film--Specifications and dimensions
Standard published on 5.3.2003
Selected format:Silver jewellery alloys—Determination of silver—Volumetric(potentiometric) method using sodium chloride or potassium chloride
Standard published on 11.10.2021
Selected format:Plastic/aluminum/plastic composite pressure pipes—Part 1: Composite pipes overlap-welded by aluminum pipe
Standard published on 19.11.2020
Selected format:Plastic/aluminum/ plastic composite pressure pipes—Part 2: Composite pipes butt-welded by aluminum pipe
Standard published on 19.11.2020
Selected format:Chlorinated polyvinyl chloridePVC-Cpiping systems for industrial applications—Part 1:General
Standard published on 15.4.2022
Selected format:Latest update: 2026-09-19 (Number of items: 2 302 332)
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