Abstract: A process for performing vertical upward using welding apparatus to form a weld bead on a workpiece that includes a welding gun and an electrode wire which is mechanically fed by the welding apparatus generally comprises (i) a step of welding the workpiece with the electrode wire feeding at a prescribed feed speed for a first predetermined duration where an arc is formed, and (ii) a step of halting the feeding of the electrode wire, as the welding gun is moved in the vertically upward direction, such that the arc is extinguished and so as to interrupt the step of welding for a second predetermined duration. As such, a weld pulse is formed, and by reiterating these steps a complete weld bead is formed from a plurality of the weld pulses.