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Standards GB - Chinese national standards - Page 5546
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 9989.2-2025
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Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 2: Determination of resistance to chemical corrosion by boiling acids, boiling neutral liquids, alkaline liquids and/ or their vapours
Standard published on 29.8.2025
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GB/T 9989.3-2025
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Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 3:Determination of resistance to chemical corrosion by alkaline liquids using a hexagonal vessel or a tetragonal glass bottle
Standard published on 29.8.2025
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GB/T 9989.4-2015
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Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 4: Determination of resistance to chemical corrosion by alkaline liquids using a cylindrical vessel
Standard published on 9.10.2015
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GB/T 9989.5-2015
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Vitreous and porcelain enamels—Determination of resistance to chemical corrosion—Part 5: Determination of resistance to chemical corrosion in closed systems
Standard published on 9.10.2015
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GB/T 999-2021
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Voltage ratings of DC electric traction system
Standard published on 31.12.2021
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GB 9990-2009
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Food nutritional fortification substance - Calcined calcium
Standard published on 19.1.2009
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GB/T 9994-2018
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Conventional moisture regains of textile materials
Standard published on 15.3.2018
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GB/T 9995-1997
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Determination of moisture content and moisture regain of textile--Oven-drying method
Standard published on 9.10.1997
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GB/T 9996.1-2008
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Determination of appearance quality of yarns made of cotton or man-made fibres,or their blends by winding on the black board - Part 1:comprehensive assessment
Standard published on 23.5.2008
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GB/T 9996.1-2026
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Inspection of appearance quality of yarns made of cotton, man-made fibres and their blends wound on blackboard—Part 1: Comprehensive assessment
Execute Date: august 2027
Standard published on 2.7.2026
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