Plasma Arc Welding (PAW)

Plasma Arc Welding is a compressed arc fusion welding process developed on the basis of TIG (Tungsten Inert Gas Welding). A water-cooled copper nozzle applies mechanical, thermal and electromagnetic triple compression to the electric arc, generating a plasma arc with high temperature and high energy density as the heat source.

Advantages of Keyhole Plasma Arc Welding

✓Significantly improved welding speed (up to more than 4–5 times that of manual TIG welding; the efficiency gain becomes more remarkable for thicker workpieces within the weldable thickness range)

✓Welds with excellent mechanical properties

✓Complete, regular full-penetration welds

✓Compliant with 100% radiographic testing requirements

✓Welds featuring chemical composition and properties consistent with the base material

✓Concentrated electric arc reduces the heat-affected zone and minimizes oxidation

✓Superior weld appearance

✓Groove preparation is not required, greatly reducing filler wire consumption

✓Easy arc control during welding