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Standards GB - Chinese national standards - Page 5935
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 13747.19-1992
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Zirconium and zirconium alloys—Determination of titanium content—Diantipyrylmethane spectrophotometric method
WITHDRAWN published on 5.11.1992
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GB/T 13747.2-1992
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Zirconium and zirconium alloys—Determination of iron content-1,10-phenanthroline spectrophotometric method
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GB/T 13747.20-1992
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Zirconium and zirconium alloys—Determination of hafnium content—Emission spectrographic method
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GB/T 13747.21-1992
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Zirconium and zirconium alloys—Determination of hydrogen content—Vacuum heating chromatographic method
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GB/T 13747.22-1992
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Zirconium and zirconium alloys—Determination of oxygen content—Inert gas fusion coulometric method
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GB/T 13747.24-1992
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Zirconium and zirconium alloys—Determination of carbon content—Combustion coulometric method
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GB/T 13747.3-1992
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Zirconium and zirconium alloys—Determination of nickel content—Dimethylglyoxime spectrophotometric method
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GB/T 13747.4-1992
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Zirconium and zirconium alloys—Determination of chromium content—Diphenylcarbazide spectrophotometric method
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GB/T 13747.5-1992
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Zirconium and zirconium alloys—Determination of aluminium content—Chrome azurol S spectrophotometric method
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GB/T 13747.6-1992
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Zirconium and zirconium alloys—Determination of copper content-2,9-dimethyl-1,10-phenanthroline spectrophotometric method
WITHDRAWN published on 5.11.1992
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