PLASMA CUTTING IN ATMOSPHERE AND UNDER WATER

This paper shows an overview of all kinds of plasma arc cutting techniques which are actually applied to practical purposes. In respect to cutting in atmosphere, noxius emissions of noise, fumes, aerosols and harming gases. In respect to cutting under water, a number of special constructions for the decommissioning of nuclear facilities and for offshore applications are described, as the plasma saw, the staff torch, the modular torch and the low voltage short-circuiting arc ignition for greater depths of water. Also the influence of the surrounding water on the appearance of the cutting kerf and metallurgical changes in the heat-affected-zone are shown.