Rehabilitation of gravity pipes

RTi Rohrtechnik Group boasts a comprehensive portfolio of trenchless repair, renovation and renewal technologies for gravity pipes, which have been in use for many decades.

Renovation methods

Cured-in-place (CIPP) lining for gravity pipes

RTi Rohrtechnik international Group has been successfully applying the cured-in-place lining method for more than 20 years …

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Lining with close-fit pipes

The r.tec® Close Fit method was one of the first renovation techniques to be used by Rohrtechnik international Group…

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Lining with continuous pipes

This lining method uses flexible pipes that are joined to form a strand on site.

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Lining with discrete pipes

This method is based on factory-made pipe modules, which are inserted one by one into the pipeline to be rehabilitated.

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Lining with pipe segments

Lining with pipe segments is a technique used in the rehabilitation of walk-in pipes and culverts.

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Lining with spirally wound pipes

This method uses prefabricated profile strips made of PVC or HDPE, which are machine-wound into an endless pipe string.

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Repair methods

Robot system

Rehabilitation robots are used for repair works such as countersinking and smoothing cracks or leaky fittings, as well as for correcting faulty pipe connections.

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Sealing rings

Partial rehabilitation by means of inserted rings is a purely mechanical rehabilitation method.

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Short liner system

The short liner system can be used to rehabilitate punctually damaged pipe sections ranging from 0.5 to 4.0 metres in length.

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Flooding method

The flooding method is used to seal off damaged spots in sewers of up to DN 400 mm in diameter by using a two-component silica gel.

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Replacement and renewal methods

Pipe bursting

Pipe bursting technologies are used in the rehabilitation of pressure and gravity lines.

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Pull-in-place method

This method uses the same machines and procedures as the pipe bursting method and serves to replace pipelines made of ductile materials.

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