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Standards GB - Chinese national standards - Page 7580
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 3780.7-2006
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Carbon black—Part 7:Determination of pH value
WITHDRAWN published on 1.8.2006
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GB/T 3780.8-1992
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Carbon black--Determination of loss heating
WITHDRAWN published on 29.6.1992
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GB/T 3780.8-2002
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Carbon black—Determination of heating loss
WITHDRAWN published on 29.5.2002
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GB/T 3780.8-2008
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Carbon black—Part 8:Determination of heating loss
WITHDRAWN published on 14.5.2008
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GB 3780.9-1983
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Carbon black--Determination of ash content (Method A)
WITHDRAWN published on 1.1.1983
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GB 3781.1-1983
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WITHDRAWN published on 1.1.1983
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GB 3781.2-1983
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Acetylene carbon black -- Determination of loss on heating
WITHDRAWN published on 1.1.1983
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GB/T 3781.4-1993
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Acetylene black—Determination of pH value
WITHDRAWN published on 3.3.1993
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GB/T 3781.5-1993
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Acetylene black—Determination of grit content
WITHDRAWN published on 3.3.1993
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GB/T 3781.5-2006
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Acetylene black—Part 5:Determination of grit content
WITHDRAWN published on 1.8.2006
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