MSHA - Code of Federal Regulations - 30 CFR 77.305
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MSHA - Title 30 CFR
30 CFR § 77.305
Access to drying chambers, hot gas inlet chambers and ductwork; installation and maintenance.


Drying chambers, hot gas inlet chambers and all ductwork in which coal dust may accumulate shall be equipped with tight sealing access doors which shall remain latched during dryer operation to prevent the emission of coal dust and the loss of fluidizing air.