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Standards GB - Chinese national standards - Page 5223
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 7726-2009
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Mechanical connections of articulated bus
Standard published on 23.3.2009
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GB/T 7727-2025
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General terminology for ship
Standard published on 31.10.2025
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GB/T 7728-2021
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Chemical analysis of metallurgical products—General rule for flame atomic absorption spectrometric methods
Standard published on 20.8.2021
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GB/T 7729-2021
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Chemical analysis of metallurgical products—General rule for spectrophotometric methods
Standard published on 20.8.2021
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GB/T 7731.1-2021
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Ferrotungsten—Determination of tungsten content—Cinchonine gravimetric method and ammonium nitrate gravimetric method
Standard published on 20.8.2021
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GB/T 7731.10-2021
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Ferrotungsten—Determination of carbon content—Infrared absorption method
Standard published on 20.8.2021
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GB/T 7731.12-2008
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Ferrotungsten - Determination of sulfur content - Infrared absorption method and combustion titration method
Standard published on 13.5.2008
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GB/T 7731.14-2008
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Ferrotungsten - Determination of lead content - The polarographic method and inductively coupled plasma-atomic emission spectrometry
Standard published on 13.5.2008
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GB/T 7731.17-2023
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Ferrotungsten—Determination of cobalt, nickel and aluminum contents—Inductively coupled plasma atomic emission spectrometric method
Standard published on 27.11.2023
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GB/T 7731.2-2007
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Ferrotungsten - Determination of manganese content - The periodate spectrophotometric method and the flame atomic absorption spectrometric method
Standard published on 11.9.2007
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