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Standards GB - Chinese national standards - Page 167
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 12242-2021
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Pressure relief devices—Performance test code
Standard published on 9.3.2021
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GB/T 12243-2021
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Spring loaded safety valves
Standard published on 30.4.2021
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GB/T 12244-2025
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Pressure reducing valves—General requirements
Standard published on 5.10.2025
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GB/T 12245-2025
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Methods of performance test for pressure reducing valves
Standard published on 31.10.2025
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GB/T 12246-2025
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Pilot operated pressure reducing valves
Standard published on 31.10.2025
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GB/T 12247-2015
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Automatic steam traps—Classification
Standard published on 10.12.2015
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GB/T 12250-2005
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Automatic steam traps-TermMarkingFace-to-face dimensions
Standard published on 11.7.2005
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GB/T 12250-2023
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Automatic steam traps—Marking
Standard published on 28.12.2023
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GB/T 12251-2005
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Automatic steam traps-Test methods
Standard published on 11.7.2005
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GB/T 12257-2023
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Laser therapeutic equipment—He-Ne laser equipment
Standard published on 23.5.2023
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