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Standards GB - Chinese national standards - Page 8475
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 6900-2006
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Chemical analysis of alumina-silica refractories
WITHDRAWN published on 30.9.2006
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GB/T 6900-2016
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chemical analysis alumina-silica refractories
WITHDRAWN published on 29.8.2016
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GB/T 6900.1-1986
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Fireclay and high-alumina refractories—Determination of loss content on ignition—Gravimetric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.10-1986
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Fireclay and high-alumina refractories—Determination of manganese oxide content—Ammonium persulfate photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.11-1986
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Fireclay and high-alumina refractories—Determination of phosphorous pentoxide content—Molybdenum blue photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.2-1986
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Fireclay and high-alumina refractories—Determination of silicon dioxide content—Gravimetric-molybdenum blue photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.3-1986
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Fireclay and high-alumina refractories—Determination of iron oxide content—o-Phenanthroline photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.4-1986
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Fireclay and high-alumina refractories—Determination of aluminium oxide content—EDTA volumetric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.5-1986
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Fireclay and high-alumina refractories—Determination of titanium dioxide content—Hydrogen peroxide photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.6-1986
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Fireclay and high-alumina refractories—Determination of calcium oxide content—EDTA volumetric method
WITHDRAWN published on 16.9.1986
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