Abstract: A process and device for rehabilitating old pipelines laid in the ground is described. The extent of above-ground prefabrication of a hose-shaped lining for the old pipeline is increased and a closed system for guiding a heatable pressure medium is described. Above-ground, a calibration hose (4) is inverted into the flat-lying lining hose (6) or a lining hose (6) is inverted into a tubular film using compressed air. The lining hose (6), which is provided with the calibration hose (4) and with the tubular foil, is drawn through a shaft into the old pipeline and by means of a heatable pressure medium, which circulates in a closed system, is pressed against the interior wall of the old pipeline and is kept in this position until the resin of the lining hose has hardened. With the process, underground sewer pipes are rehabilitated.

Abstract: Apparatus for introducing a lining hose containing curable resin from a main pipeline, e.g. a sewer mains, into a lateral connection, e.g. a service pipe for a property, includes a shield having an arcuate configuration and complementing an inner contour of the main pipeline in an area of an inlet port of the lateral connection. The shield has an outlet opening destined for alignment with the inlet port of the lateral connection and is defined by a cross section which corresponds to a cross section of the inlet port of the lateral connection. A pipe having one end extends from the outlet opening inwardly into the main pipeline, and a conduit is connected to the other end of the pipe and provided for conducting a pressure fluid for everting a lining hose and an associated calibration hose in the lateral connection, with the calibration hose being secured adjacent the outlet opening of the shield.