C.F.R. » Title 30 » CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR › SUBCHAPTER O—COAL MINE SAFETY AND HEALTH › PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES › Subpart L—Fire Protection

30 C.F.R. § 75.1101-17

Sealing of dry powder chemical systems

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Each dry powder chemical system shall be adequately sealed to protect all components of the system from moisture dust, and dirt.