The CF-Liners method is suitable for the renovation of gravity and pressure pipes with DN from 100 to 300 mm. CF-Liner pipes are made of very strong polyethylene. In this method the pipe is thermo-plastically pre-formed into a C-shape and wound on drums to be delivered to the work site.

At the place of installation the relining pipe formed in a C-shape is pulled into the renovated pipe with a winch. Depending on the diameter the pipe section to be renovated in one step may be as long as 300 m. The length of relining can be increased with the help of a simple electro fitting welding, in accordance with the task.

The space required for pulling in the liner is small, e.g. , in the case of sewer systems, the existing cleaning man-holes provide sufficient space.

After is has been pulled in, it is trimmed to size and special sealing elements are put to both ends. The liner is steam-heated, then, pressure is applied to it. The lining regains its original shape (egg-profile, circle)(Memory effect). The new pipe is pressed against the wall of the renovated pipe, which is ensured by the correspondence of the CF-Liner to the inner diameter of the renovated pipe.

When renovation is complete, connections are opened up by a robot specially designed for this purpose.

Application for the trenchless renovation of water conduits, gas pipe, sewers, rainwater drains industrial and other pipes.