shielded metal arc welding does not required any shielding gas
why oxyacetylene filler rods cannot be used for gas tungusten ar welding
Both currents have their ups and downs but both are used in the maufacturing industry, in reality it depends on your base metal and electrode.
What type of welding can we use LPG ?
TIG's heat is generated by electricity, or in laymen's terms an arc. Gas welding's heat is generated by a fuel gas and an oxidizing gas, or in laymen's terms a flame.