TIG welding procedure

19 September 2019
TIG (Tungsten Inert Gas) welding and GTAW (Gas Tungsten Arc Welding)

Arc welding in inert gas with non-consumable electrode (TIG) is a procedure that produces very high quality welds. The operator must be highly trained to obtain strong, secure welds. It is ideal for welding thin materials or work that is visible and must therefore be accurate.

It is an electric welding process where heat is generated through an electric arc between a non-consumable tungsten electrode (a stick of soldering material with high thermoelectric power) and the base material (i.e. the material making up the weld workpieces). The welding area, the electrode and the molten metal are protected by inert gas supplied by the torch.

The TIG procedure can be carried out using filler material or by melting the base material. The process can also be electrically powered by direct current (DC) and alternating current (AC).

The following items are necessary for this type of welding:

  • A power source;
  • A clamp with earth cable
  • An electrode holder torch;
  • A tungsten electrode;
  • A flowmeter with 2 pressure gauges;