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Standards GB - Chinese national standards - Page 268
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 13241-2017
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Iron ores—Determination of reducibility
Standard published on 7.9.2017
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GB/T 13242-2017
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Iron ores—Low-temperature disintegration test—Method using cold tumbling after static reduction
Standard published on 14.10.2017
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GB/T 13247-2019
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Methods for sampling and testing the grain size of ferroalloys products
Standard published on 18.10.2019
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GB/T 13248-2008
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Rubber and rubber latices - Determination of manganese content - Sodium periodate photometric methodes
Standard published on 4.6.2008
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GB/T 13251-2018
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Packaging—Steel drum closures
Standard published on 14.5.2018
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GB/T 13252-2008
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Packing containers - Steel pails
Standard published on 18.7.2008
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GB/T 13253-2006
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Rubber - Determination of manganese content by atomic absorption spectrometry
Standard published on 7.12.2006
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GB/T 13254-2017
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Caprolactam for industrial use
Standard published on 1.11.2017
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GB/T 13255.1-2009
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Test methods of caprolactam for industrial use - Part 1: Determination of colourity of 50% aqueous caprolactam solution - Spectrometric method
Standard published on 13.5.2009
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GB/T 13255.2-2009
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Test methods of caprolactam for industrial use - Part 2: Determination of crystallizing point
Standard published on 13.5.2009
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