A portable plasma cutting apparatus for coping and cutting pre-bend tubular members includes a control unit, a control arm, a first step motor, a second step motor, a linear drive mechanism, a rotary drive mechanism, a plasma cutter, a tube placement deck, and a platform. The control arm is operatively coupled with the first step motor by the rotary drive mechanism to rotationally drive the control arm around a rotational axis. The control arm is operatively coupled with the second step motor by the linear drive mechanism to linearly drive the control arm along the rotational axis. A torch of the plasma cutter is terminally mounted to the control arm and positioned in between the control unit and the tube placement deck as the control arm rotationally and linearly moves about the control unit. The platform provides the sufficient height for the portable plasma cutting apparatus.