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Standards GB - Chinese national standards - Page 623
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 16553-2017
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Gems—Testing
Standard published on 14.10.2017
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GB/T 16554-2017
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Diamond grading
Standard published on 14.10.2017
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GB/T 16555-2025
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Chemical analysis of refractories containing carbon,silicon carbide or nitride
Standard published on 29.8.2025
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GB/T 16556-2007
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self-contained open-circuit compressed air breathing apparatus
Standard published on 26.6.2007
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GB 16556-2025
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Respiratory protection—Self-contained open-circuit compressed air breathing apparatus
Execute Date: september 2026
Standard published on 29.8.2025
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GB 16557-2023
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Signs for the life-saving appliances and escape route of ships
Standard published on 23.5.2023
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GB/T 16558.1-2009
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The ship maintenance system - Part 1: General rules
Standard published on 31.3.2009
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GB/T 16558.2-2009
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The ship maintenance system - Part 2: CWBT code number
Standard published on 31.3.2009
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GB/T 16558.3-2009
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The ship maintenance system - Part 3: Maintenance grades, period coding and permissible deviation for maintenance period of ship
Standard published on 31.3.2009
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GB/T 16558.4-2009
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The ship maintenance system - Part 4: Code and description for the work card and equipment card
Standard published on 31.3.2009
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