Lining tube for reconditioning of defective sewer pipes and method of producing and installing one

A method for lining a defective sewer pipe, the method comprising:

• providing a lining tube with an inner film tube which is transparent to UV light and which has a connecting section, which extends in a longitudinal direction thereof and connects two mutually parallel circumferential portions of the inner film tube to form a circumferentially closed inner film tube with a defined nominal diameter, and a radially expandable layer of fiber material arranged around the inner film tube and being impregnated with a curable reactive resin that is curable by UV light;
• wherein the connecting section has a predetermined breaking point which extends along the inner film tube and is formed to be parted in the circumferential direction;
• wherein the inner film tube has a circular cross section with a diameter which is more than 10% of the nominal diameter, and wherein two mutually parallel outer circumferential portions of the film tube are connected to one another in a region of the connecting section, forming a film loop running in the circumferential direction of the inner film tube and extending over a length of the inner film tube, by way of a transparent film strip which is adhesively bonded on or thermally welded on and spans the film loop;
• pulling the lining tube into the defective sewer pipe, closing two ends of the lining tube with a packer;
• expanding the lining tube by introducing a pressure medium into the inner film tube in the interior of the sewer pipe, thereby parting the predetermined breaking point in the connecting section and causing the lining tube to come to rest against an inner wall of the sewer pipe;
• and
• curing the reaction resin in the ply of fiber material by introducing a radiation source into the interior of the inner film tube and irradiating the resin.

A method for lining a defective sewer pipe, the method which comprises:

• providing a lining tube with an inner film tube having a connecting section, which extends in a longitudinal direction thereof and connects two mutually parallel circumferential portions of the inner film tube to form a circumferentially closed inner film tube with a defined nominal diameter, and a radially expandable layer of fiber material arranged around the inner film tube and being impregnated with a curable reactive resin;
• wherein the connecting section has a predetermined breaking point which extends along the inner film tube and is formed to be parted in the circumferential direction;
• and
• wherein a further inner film tube of an airtight transparent plastics material is arranged inside said inner film tube, the further inner film tube extending in the longitudinal direction of the lining tube over an entire length thereof;
• pulling the lining tube into the defective sewer pipe and closing two ends of the lining tube with a packer;
• expanding the lining tube by introducing a pressure medium into the further inner film tube to radially expand the lining tube in the interior of the sewer pipe, thereby parting the predetermined breaking point in the connecting section, and causing the lining tube to come to rest against an inner wall of the sewer pipe;
• and
• curing the reaction resin in the ply of fiber material by introducing a radiation source into the interior of the inner film tube and irradiating the resin.