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40.5.2.4.1
Where fire detection systems are incorporated into the pneumatic conveying, dust collection, or centralized vacuum cleaning system, the fire detection systems shall be interlocked to shut down any active device feeding materials to the pneumatic conveying, dust collection, or centralized vacuum cleaning system, on actuation of the detection system. [654:10.2.4.1]
40.5.2.4.2
Where spark or infrared detection and extinguishing systems are provided, the process shall be permitted to continue operating on activation of the detection system. [654:10.2.4.2]
40.5.2.4.3
Where a spark or infrared detection system actuates a diverter valve that sends potentially burning material to a safe location, the process shall be permitted to continue operating on activation of the detection system. [654:10.2.4.3]

Related Code Sections

40.5.2.4 Dust Explosion and Fire Prevention, Detection Systems
Where fire detection systems are incorporated into the pneumatic conveying, dust collection, or centralized vacuum cleaning system, the fire ...