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Standards GB - Chinese national standards - Page 229
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 12810-2021
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Laboratory glassware—Capacity methods testing and use of volumetric instruments
Standard published on 20.8.2021
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GB/T 12811-2025
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Test method for average cell size of rigid cellular plastics
Standard published on 31.10.2025
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GB/T 12812-2006
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Rigid cellular plastics - Determination of friability
Standard published on 18.9.2006
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GB/T 12817-2021
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General technical specification for railway passenger car
Standard published on 9.3.2021
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GB/T 12818-2021
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Rules for inspecting and testing of railway passenger car after completion of construction
Standard published on 9.3.2021
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GB/T 1282-2013
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Chemical reagentPhosphoric acid
Standard published on 31.12.2013
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GB/T 12823.1-2008
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Photography - Density measurement - Part 1: Terms, symbols and notations
Standard published on 24.9.2008
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GB/T 12823.1-2026
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Photography and graphic technology—Density measurements—Part 1: Geometry and functional notation
Execute Date: february 2027
Standard published on 2.7.2026
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GB/T 12823.2-2026
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Photography and graphic technology—Density measurements—Part 2: Geometric conditions for transmittance density
Execute Date: february 2027
Standard published on 2.7.2026
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GB/T 12823.3-2025
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Photography and graphic technology—Density measurements—Part 3:Spectral conditions
Standard published on 1.8.2025
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