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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
Thermoplastics pipes for the conveyance of fluids—Nominal outside diameters and nominal pressures
WITHDRAWN published on 24.10.2001
Selected format:Test method of corrosion on the unplasticized polyvinyl chloride (PVC)pipes for chemical industry
WITHDRAWN published on 1.1.1984
Selected format:Unplasticized polyvinyl chloride (PVC)pipes for chemical industry
WITHDRAWN published on 1.1.1984
Selected format:Unplasticized polyvinyl chloride (PVC-U) pipes for chemical industry
WITHDRAWN published on 10.4.1996
Selected format:Test methods of density for printed and dyed fabrics
WITHDRAWN published on 20.6.1978
Selected format:Unplasticized polyvinyl chloride (PVC)fittings for chemical industry
WITHDRAWN published on 1.1.1984
Selected format:Rolling bearings--Miniature radial ball bearings--Diameter series 7--Boundary dimensions
WITHDRAWN published on 1.1.1984
Selected format:Spherlcal plain bearing rod ends--Boundary dimensionsand tolerances
WITHDRAWN published on 1.1.1991
Selected format:Classification and specification of carbon steel scraps for melting
WITHDRAWN published on 1.1.1984
Selected format:Iron and steel scraps
WITHDRAWN published on 27.9.1996
Selected format:Latest update: 2026-01-26 (Number of items: 2 257 479)
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