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Standards GB - Chinese national standards - Page 7579
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 3780.4-2003
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Carbon black—Part 4:Determination of dibutylphthalate absorption number and preparation of samples (compressed sample)
WITHDRAWN published on 11.10.2003
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GB/T 3780.4-2008
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Carbon black—Part 4:Determination of oil absorption number for compressed sample
WITHDRAWN published on 14.5.2008
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GB/T 3780.5-1991
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Carbon black used in rubber products Determination of specific surface area--CTAB test method
WITHDRAWN published on 23.4.1991
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GB/T 3780.5-2002
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Carbon black used in rubber products—Determination of specific surface area—CTAB test method
WITHDRAWN published on 29.5.2002
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GB/T 3780.5-2008
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Carbon black—Part 5:Determination of specific surface area—CTAB test method
WITHDRAWN published on 14.5.2008
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GB 3780.6-1983
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WITHDRAWN published on 1.1.1983
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GB/T 3780.6-1998
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Carbon black used in rubber products—Tinting strength test method
WITHDRAWN published on 4.11.1998
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GB/T 3780.6-2007
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Carbon black—Part 6:Determination of tinting strength
WITHDRAWN published on 28.11.2007
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GB 3780.7-1983
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Carbon black--Determination of pH value
WITHDRAWN published on 1.1.1983
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GB/T 3780.7-1996
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Carbon black—Determination of pH value
WITHDRAWN published on 28.10.1996
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