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Standards GB - Chinese national standards - Page 8476
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 6900.7-1986
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Fireclay and high-alumina refractories—Determination of magnesium oxide content—Xylidyl blue -CTAB photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.8-1986
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Fireclay and high-alumina refractories—Determination of calcium oxide and magnesium oxide content—Atomic absorption spectrophotometric method
WITHDRAWN published on 16.9.1986
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GB/T 6900.9-1986
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Fireclay and high-alumina refractories—Determination of potassium oxide and sodium oxide content—Atomic absorption spectrophotometric method
WITHDRAWN published on 26.8.1986
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GB/T 6901-2008
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Chemical analysis of silica refractories
WITHDRAWN published on 8.5.2008
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GB/T 6901.1-1986
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Silica refractories--Determination of loss content on ignition--Gravimetric method
WITHDRAWN published on 16.9.1986
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GB/T 6901.1-2004
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Chemical analysis of silica refractories—Part 1:Determination of loss on ignition-Gravmetric method
WITHDRAWN published on 19.1.2004
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GB/T 6901.10-1986
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silica refractories--Determination of manganese oxide content--Atomic absorption spectrophotometric method
WITHDRAWN published on 16.9.1986
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GB/T 6901.10-2004
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Chemical analysis of silica refractories—Part 10:Determination of manganese oxide—Atomic absorption spectrophotometric method
WITHDRAWN published on 19.1.2004
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GB/T 6901.11-1986
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Silica refractories--Determination of phosphorus pentoxide content--Molybdenum blue photometric method
WITHDRAWN published on 16.9.1986
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GB/T 6901.11-2004
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Chemical analysis of silica refractories—Part 11:Determination of phosphorus pentoxide—Molybdenum blue photometric method
WITHDRAWN published on 19.1.2004
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