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Standards GB - Chinese national standards - Page 8740
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 9018.2-1988
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Celestite ores--Determination of barium content--Barium chromate volumetric method
WITHDRAWN published on 1.1.1988
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GB 9018.3-1988
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Celestite ores--Determination of sulphate content--Barium sulphate gravimetric method
WITHDRAWN published on 1.1.1988
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GB 9018.4-1988
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Celestite ores--Determination of calcium and magnesium contents--Atomic absorption spectrometry
WITHDRAWN published on 1.1.1988
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GB 9018.5-1988
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Celestite ores--Determination of silicon content--Molybdenum blum spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 9018.6-1988
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Celestite ores--Determination of silicon content--Perchloric acid dehydration gravimetric method
WITHDRAWN published on 1.1.1988
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GB 9018.7-1988
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Celestite ores--Determination of iron content--Sulphosalicylic acid spectrophotometric method
WITHDRAWN published on 1.1.1988
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GB 9018.8-1988
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Celestite ores--Determination of aluminium content--Chromazurol S spectrophotometric method
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GB 9018.9-1988
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Celestite ores--Determination of aluminium content--EDTA volumetric method
WITHDRAWN published on 1.1.1988
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GB/T 9019-1988
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Nominal diameter of pressure vessel
WITHDRAWN published on 1.1.1988
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GB/T 9019-2001
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Nominal diameter of pressure vessels
WITHDRAWN published on 13.2.2001
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