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Standards GB - Chinese national standards - Page 8747
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 9639-1988
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Plastics--Film and sheeting--Determination of impact resistance--Free falling dart method
WITHDRAWN published on 8.7.1988
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GB/T 9640-1988
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Polymeric materials cellular flexible—Accelerated ageing tests
WITHDRAWN published on 7.7.1988
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GB/T 9642-1988
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Polyethylene (PE) pipes and fittings--Designation of polyethylene based on nominal density and melt flow rate
WITHDRAWN published on 8.7.1988
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GB/T 9643-1988
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Polyethylene (PE) pipes andfittings--Determination of melt flow rate
WITHDRAWN published on 8.7.1988
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GB 9644-1988
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Unplasticized polyvinyl chloride (PVC-U) pipes and fittings for drinking water supply--Extractability of leadtincadmium and mercury occurring as impurities--Test method and permitted levels
WITHDRAWN published on 8.7.1988
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GB/T 9645-1988
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Unplasticized polyvinyl chloride (PVC-U) pipes--Determination of water absorption
WITHDRAWN published on 8.7.1988
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GB/T 9646-1988
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Unplasticized polyvinyl chloride (PVC-U) pipes--Determination of resistance to acetone
WITHDRAWN published on 8.7.1988
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GB/T 9647-1988
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Test method for extemal loading resistance for plastic pipe
WITHDRAWN published on 8.7.1988
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GB/T 9647-2003
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Thermoplastics pipes—Determination of ring stiffness
WITHDRAWN published on 5.3.2003
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GB/T 9648-1988
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Code for international system of units
WITHDRAWN published on 8.7.1988
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