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NFPA 85 Boiler and Cumbustion System Hazards Code question.

NFPA 85 Boiler and Cumbustion System Hazards Code question.

NFPA 85 Boiler and Cumbustion System Hazards Code question.

(OP)
I need some information on minimum feeder speed requirements for coal mills.  Right now the minimum feeder speed on the mills is 20%.  I would like to drop that to 15%.  Could this create any problems when starting, or stopping a mill under normal operation? I could not find anything specific in NFPA 85.

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