Mine Safety and Health Administration (MSHA) - Code of Federal Regulations - 30 CFR 75.1101-22
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MSHA - Title 30 CFR
30 CFR § 75.1101-22

Inspection of dry powder chemical systems.

(a) Each dry powder chemical system shall be examined weekly and a functional test of the complete system shall be conducted at least once each year.

(b) Where the dry powder chemical system has been actuated, all components of the system shall be cleaned immediately by flushing all powder from pipes and hoses and all hose damaged by fire shall be replaced.




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