Pennsylvania Code
Title 34 - LABOR AND INDUSTRY
Part I - Department of Labor and Industry
Chapter 5 - BLASTING, DEMOLITION, FIREWORKS AND EXPLOSIVES
Subchapter D - EXPLOSIVES
SPECIAL PRECAUTIONS: BLACK POWDER MILLS
Section 5.162 - Incorporating mills

(a) The mechanism for starting or stopping an incorporating mill shall be so arranged that after the material has been placed in the bowl the mill may be started only from a reasonably safe station, and then only after all employes have left the building.

(b) No loading or unloading of ingredients or finished mixed material shall occur while a mill is in operation.

(c) Bolts or parts of machinery which might break off and fall into the mill while it is operating shall be suitably protected so that, in the event of such breakage, these parts will not fall into the mixing bowl.