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Standards GB - Chinese national standards - Page 429
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 14634.1-2010
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Test methods of rare earth three-band phosphors for fluorescent lamps - Part 1: Determination of relative brightness
Standard published on 9.8.2010
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GB/T 14634.2-2010
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Test methods of rare earth three-band phosphors for fluorescent lamps - Part 2: Determination of emission dominantpeak and chromaticity
Standard published on 9.8.2010
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GB/T 14634.3-2010
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Test methods of rare earth three-band phosphors for fluorescent lamps - Part 3: Determination of thermostability
Standard published on 9.8.2010
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GB/T 14634.5-2010
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Test methods of rare earth three-band phosphors for fluorescent lamps - Part 5: Determination of density
Standard published on 9.8.2010
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GB/T 14634.6-2010
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Test methods of rare earth three-band phosphors for fluorescent lamps - Part 6: Determination of specific surface area
Standard published on 9.8.2010
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GB/T 14634.7-2010
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Test methods of rare earth three-band phosphors for fluorescent lamps - Part 7: Determination of temperature quenching
Standard published on 9.8.2010
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GB/T 14635-2020
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Rare earth metals and their compounds—Determination of total rare earth content
Standard published on 19.11.2020
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GB/T 14636-2021
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Determination of calcium and magnesium in industrial circulating cooling water and scale—Atomic absorption spectrometric method
Standard published on 20.8.2021
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GB/T 14637-2021
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Determination of copper,iron and zinc in industrial circulating cooling water and scale—Atomic absorption spectrometric method
Standard published on 20.8.2021
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GB/T 1464-2024
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Test method for density of sandwich construction or cores
Standard published on 15.3.2024
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