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Tig welding uses a welding torch with a tungsten electrode and shielding gas. The electrode is struck on the workpeice to create a short arc that in turn creates the fusion required. As a filler rod is also used the welder needs to use two hands, one for the Tig Welding Torch and one hand to feed in filler metal as required.
Tig welding is more likely to be used in industrial situations and is most common in the welding of stainless steel; however it can be applied to welding most all metals including aluminium. Tig welds are pure in respect to having no slag and minimum cleanup is required, allowing a quality finish both visually and in strength.
Depending on the skill of the welder and material being used, tig welds can be used in all position work and is suited to pipe welding where weld quality is essential. However for those interested in learning how to tig weld the best starting position is down hand or flat.