Emergency stop buttons shall be provided on mechanical ovens near the point where operators are stationed.
Main shutoff valves, operable separately from any automatic valve, shall be provided to permit turning off the fuel or steam in case of an emergency.
Main shutoff valves shall be located so that explosions, fires, etc. will not prevent access to these valves.
Main shutoff valves shall be locked in the closed position when men must enter the oven or when the oven is not in service.
All piping at ovens shall be tested to be gastight.