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Standards GB - Chinese national standards - Page 7593
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
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GB/T 4219-1996
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Unplasticized polyvinyl chloride (PVC-U) pipes for chemical industry
WITHDRAWN published on 10.4.1996
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GB/T 422-1978
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Test methods of density for printed and dyed fabrics
WITHDRAWN published on 20.6.1978
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GB 4220-1984
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Unplasticized polyvinyl chloride (PVC)fittings for chemical industry
WITHDRAWN published on 1.1.1984
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GB 4221-1984
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Rolling bearings--Miniature radial ball bearings--Diameter series 7--Boundary dimensions
WITHDRAWN published on 1.1.1984
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GB/T 4222-1991
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Spherlcal plain bearing rod ends--Boundary dimensionsand tolerances
WITHDRAWN published on 1.1.1991
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GB 4223-1984
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Classification and specification of carbon steel scraps for melting
WITHDRAWN published on 1.1.1984
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GB/T 4223-1996
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Iron and steel scraps
WITHDRAWN published on 27.9.1996
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GB/T 4223-2004
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Iron and steel scraps
WITHDRAWN published on 20.5.2004
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GB 4224-1984
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Classification and specification of iron scraps for melting
WITHDRAWN published on 1.1.1984
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GB 4225-1984
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Classification and specification of alloy steel scraps for melting
WITHDRAWN published on 1.1.1984
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