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Standards GB - Chinese national standards - Page 509
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 15224.1-2018
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Classification for quality of coal—Part 1: Ash
Standard published on 14.5.2018
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GB/T 15224.2-2021
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Classification for quality of coal—Part 2: Sulfur content
Standard published on 20.8.2021
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GB/T 15224.3-2022
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Classification for quality of coal—Part 3: Calorific value
Standard published on 15.4.2022
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GB/T 15227-2019
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Test method of air permeability, watertightness, wind load resistance performance for curtain walls
Standard published on 10.12.2019
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GB/T 15229-2011
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Lightweight aggregate concrete small hollow block
Standard published on 30.12.2011
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GB 1523-2013
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Sheep wool
Standard published on 19.7.2013
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GB/T 15231-2023
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Test methods for the properties of glassfibre reinforced cement
Standard published on 27.11.2023
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GB/T 15233-2025
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Packaging—Unit load dimensions
Standard published on 30.6.2025
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GB/T 15234-2025
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Plastic flat pallet
Standard published on 1.8.2025
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GB/T 15236-2008
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Occupational safety and health glossary
Standard published on 15.12.2008
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