Abstract: The invention relates to a method for loosening and fragmenting scale (2) from the inside of particularly long and/or bent pipelines with pipe (1), characterized in that:—a line/cable (4) is blown through the pipe (1) with a gas flow (3) under pressure, in that the friction between the gas flow (3) and the length of the line/cable (4) results in a rapid transport of the line/cable (4) through the pipe (1),—a nozzle head (6) connected to a hose (7) for supplying water under high pressure is attached to the outer end of the line/cable (4),—the line cable (4) is pulled back while the water spouting from the nozzle head under pressure, forming at least a water jet (8), cuts up and crushes the scale (2) into fragments (2?), said fragments (2?) then being fluidised in the gas flow (3), where the water jet (8) after purging forms an aerosol fog which is mixed in with the gas flow (3) forming a three-phase regime,—the supplied gas is transported out through the pipe (1).

Abstract: The invention relates to a method for generating a scale-removing or coat-applying system based on a vacuum-balancing low-pressure multicomponent two-phase fluid flow. A cleaning site such as, e.g., a pipe circuit (A) or the inner cavities of a heat exchanger (B) is supplied with an already used cleaning agent in a two- or multiphase flow made up of ca. 10% liquid and ca. 90% air or gas, which after separation is used again by way of continuously monitoring the ion density of the separated liquid, using a conductivity apparatus which determines whether it shall be filtered and reused, be supplied with new liquid and/or solids, or be dumped. A liquid flow and separated air/gas flow from an air pump meet at a mixing point from where an intended two-phase flow flows to the cleaning site (A), (B), or similar, through this and then forward to return as a re-use medium. A gas-injected liquid/powder flow from a mixing unit is also used for coating, e.g.