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CFR > Title 30 - Mineral Resources > CHAPTER I—MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR > SUBCHAPTER O—COAL MINE SAFETY AND HEALTH (parts 70 to 90) > PART 75—MANDATORY SAFETY STANDARDS—UNDERGROUND COAL MINES > SUBPART L—Fire Protection (§75.1100 to §75.1108) > 75.1101-17—Sealing of dry powder chemical systems.
75.1101-17—Sealing of dry powder chemical systems.
Each dry powder chemical system shall be adequately sealed to protect all components of the system from moisture dust, and dirt.