ABSTRACT
Waterjetting is, in its simplest form, concerned with the development, the transmission and the application of power. This power is normally created in a water medium by a pump, pushing a given volume of water into a high pressure feed line and providing it with a certain amount of energy in the process. This water flows down through the line, usually a strong metal tube over at least part of its length, to a nozzle. The nozzle contains one or more exit holes or orifices which are normally of a much smaller size than the feed line. Since a constant volume of water reaches the nozzle, it must accelerate to a higher speed in order to escape through these orifices, which also serve to focus the water into a coherent stream or jet, and to direct the streams towards the required point on the target surface or work piece.
