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Standards GB - Chinese national standards - Page 4916
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 5135.17-2011
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Automatic sprinkler system - Part 17Pressure reducing valves
Standard published on 20.7.2011
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GB/T 5135.18-2010
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Automatic sprinkler system - Part 18Pipe hangers
Standard published on 14.1.2011
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GB/T 5135.18-2026
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Automatic sprinkler system—Part 18Pipe supports and hangers for fire protection system
Execute Date: april 2027
Standard published on 31.3.2026
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GB/T 5135.19-2010
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Automatic sprinkler system - Part 19: Plastic pipe and fittings
Standard published on 26.9.2010
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GB 5135.2-2003
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Automatic sprinkler system--Part 2:Wet system alarm valvesretard chamberwater motor alarm
Standard published on 8.10.2003
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GB 5135.2-2025
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Automatic sprinkler system—Part 2: Wet system alarm valves, retard chamber and water motor alarm
Execute Date: november 2026
Standard published on 31.10.2025
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GB/T 5135.20-2010
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Automatic sprinkler system - Part 20: Coating steel pipe
Standard published on 26.9.2010
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GB 5135.21-2011
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Automatic sprinkler system - Part 21: Inspector’s test connection
Standard published on 30.12.2011
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GB 5135.21-2025
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Automatic sprinkler system—Part 21: Inspector""s test connection
Execute Date: november 2026
Standard published on 31.10.2025
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GB 5135.22-2019
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Automatic sprinkler system—Part 22:Specific application sprinklers
Standard published on 17.12.2019
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