TIG welding is a welding technique using an electric arc, a tungsten electrode and an inert (or neutral) gas. The electric arc is established between a tungsten electrode and the parts to be welded. A neutral gas is thrown into the welding zone to protect the electric arc, the electrode, the filler metal and the melt from the oxidation of the air. This neutral gas is usually argon as it can protect all molten metals. This type of welding is intended for the realization of fine work requiring a perfect welding quality.
In the case of stainless steels, the most common welding process is TIG (Tungsten Inert Gas) welding because it is very suitable for precision welding.
The junctions thereby produced are almost the only places in the installation where problems such as leaks, micro-cracks, corrosion, points of mechanical weakness for example can appear.
The welds must be well controlled during the realization.