Vertical underwater welding
Vertical underwater welding is already one of the most widespread welding techniques in the section of shipping for the repair and damage restoration of the ship and most preferred technique for “butt” and “fillet” welding.

Vertical–down welding is likely better that the vertical-up welding since the pressure of the arc gives vertical support to the liquid metal and fills the cavity made by the arc to form acceptable weld beads.

The technique of the vertical underwater welding contains 2 separate methods of welding, “vertical-up” (vertical underwater welding directed upwards) and “vertical-down” (vertical underwater welding directed downwards).

The vertical-up welding the liquid puddle does not have adequate support to form the weld bead since the liquid metal runs down due to gravity. In both cases experienced and well trained diver-welders are required for both methods.

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