Process and device for rehabilitating pipes

A closed system for rehabilitating an old pipeline laid in the ground, comprising:

• a plurality of connected hose assemblies connected together, each hose assembly having a calibration hose inverted into a lining hose, each hose assembly being drawn into the old pipeline, the hose assembly being constructed using
• a pressure chamber operated with compressed air above-ground which has a connecting piece for securing one end of the lining hose and the calibration hose;
• a pressure medium being circulated through the closed system by a pump;
• and
• at least one heating device for heating the pressure medium guided through the system.

A method of preparing a hose assembly suitable for rehabilitating a conduit, comprising:

• providing a lining hose adapted to receive a thermo-setting resin;
• impregnating said resin into said lining hose;
• and
• everting a calibration hose inside of said resin-impregnated lining hose;
• whereby said providing, said impregnating and said everting each occur outside of said conduit.

A method of rehabilitating a pipeline comprising:

• preparing a hose assembly having a resin-impregnated lining hose and an everted calibration hose therein;
• attaching a connection head to each end of said hose assembly;
• locating said hose assembly within said pipeline to be rehabilitated;
• expanding said hose assembly into intimate contact with said pipeline;
• and
• heating said thermo-setting resin to harden said hose assembly thereby rehabilitating said pipe.

A closed system for rehabilitating an old pipeline laid in the ground, comprising:

• a plurality of connected hose assemblies connected together, each hose assembly having a lining hose inverted into a tubular lining and at least one hose-shaped lining, each hose assembly being drawn into the old pipeline, the hose assembly being constructed using a pressure chamber operated with compressed air above-ground which has a connecting piece for securing one end of the tubular film and the lining hose;
• a pressure medium to circulate through the closed system by at least one pump;
• and
• at least one heating device for heating the pressure medium guided through the system.