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Standards GB - Chinese national standards - Page 331
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 13885-2017
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Determination of the contents of calcium, copper, iron, magnesium, manganese, potassium, sodium and zinc in feeds—Method using atomic absorption spectrometry
Standard published on 1.11.2017
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GB 13887-2008
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Safety codes for cold pressing
Standard published on 11.12.2008
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GB/T 13888-2024
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Method of measurement of the coercivity (up to 160 kA/m) of magnetic materials in an open magnetic circuit
Standard published on 29.9.2024
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GB/T 13889-2015
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Electric detonator for oil and gas well
Standard published on 15.5.2015
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GB/T 13890-2025
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Classification and terminology of natural stones
Standard published on 1.8.2025
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GB/T 13891-2008
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Test methods of specular gloss for decorative building materials
Standard published on 30.6.2008
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GB/T 13892-2020
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Surface active agents—Determination of iodine value
Standard published on 14.12.2020
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GB/T 13893-2008
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Paints and varnishes - Determination of resistnace to humidity - Continuous condensation
Standard published on 4.6.2008
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GB/T 13893.2-2019
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Paints and varnishes—Determination of resistance to humidity—Part 2: Condensation(in-cabinet exposure with heated water reservoir)
Standard published on 25.3.2019
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GB/T 13894-2023
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Petroleum and liquid petroleum products—Level measurement—Manual methods
Standard published on 27.11.2023
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