The powered pipe cutter and the pipe flaring tool both have a piston slidably mounted in a cylinder. When the second operation mode is switched to the first operation mode, discharge-side pressures of both the rotary compression elements are applied as a back pressure of the second vane, and thereafter an intermediate pressure is applied which is between suction-side and discharge-side pressures of both the rotary compression elements. Triggering events can comprise specific times of day as determined by a real-time clock that can be associated with a constructionfabrication device, such as a welder.