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Standards GB - Chinese national standards - Page 8258
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 5070-2007
WITHDRAWN
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Chemical analysis of refractories containing chrome
WITHDRAWN published on 18.4.2007
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GB/T 5070.1-1985
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Magnesite-chrome refractories--Determination of loss content on ignition--Gravimetric method
WITHDRAWN published on 17.4.1985
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GB/T 5070.1-2002
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Chemical analysis of magnesia chromite refractories—Part 1:Determination of loss on ignition—Gravimetric method
WITHDRAWN published on 31.12.2002
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GB/T 5070.10-1985
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Magnesite-chrome refractories--Determination of potassium oxide and sodium oxide content--Atomic absorption spectrophotometric method
WITHDRAWN published on 17.4.1985
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GB/T 5070.10-2002
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Chemical analysis of magnesia chromite refractories—Part 10:Determination of chromium oxide—Ammonium ferrous sulfate volumetric method
WITHDRAWN published on 31.12.2002
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GB/T 5070.11-2002
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Chemical analysis of magnesia chromite refractories—Part 11:Determination of manganese oxide—Atomic absorption spectrophotometric method
WITHDRAWN published on 31.12.2002
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GB/T 5070.12-2002
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Chemical analysis of magnesia chromite refractories—Part 12:Determination of potassium oxide and sodium oxide—Atomic absorption spectrophotometric method
WITHDRAWN published on 31.12.2002
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GB/T 5070.2-1985
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Magnesite-chrome refractories--Determination of silicon dioxide content--Molybdenum blue photometric method
WITHDRAWN published on 17.4.1985
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GB/T 5070.2-2002
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Chemical analysis of magnesia chromite refractories—Part 2:Determination of silicon dioxide—Molybdenum blue photometric method
WITHDRAWN published on 31.12.2002
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GB/T 5070.3-1985
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Magnesite-chrome refractories--Determination of iron oxide content--O-Phenanthroline photometric method
WITHDRAWN published on 17.4.1985
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