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
![renovierungsverfahren](https://www.rti.eu/wp-content/uploads/2016/08/renovierungsverfahren.jpg)
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 …
![rohrsanierung-renovierungsverfahren](https://www.rti.eu/wp-content/uploads/2016/08/rohrsanierung-renovierungsverfahren.jpg)
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…
![rohrstrang-lining](https://www.rti.eu/wp-content/uploads/2016/06/rohrstrang-lining.jpg)
Lining with continuous pipes
This lining method uses flexible pipes that are joined to form a strand on site.
![einzelrohr-lining](https://www.rti.eu/wp-content/uploads/2016/06/einzelrohr-lining.jpg)
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.
![montageverfahren](https://www.rti.eu/wp-content/uploads/2016/06/montageverfahren.jpg)
Lining with pipe segments
Lining with pipe segments is a technique used in the rehabilitation of walk-in pipes and culverts.
![wickelrohr-lining](https://www.rti.eu/wp-content/uploads/2016/06/wickelrohr-lining.jpg)
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.
Repair methods
![roboterverfahren](https://www.rti.eu/wp-content/uploads/2016/06/roboterverfahren.jpg)
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.
![innenmanschetten](https://www.rti.eu/wp-content/uploads/2016/06/innenmanschetten.jpg)
Sealing rings
Partial rehabilitation by means of inserted rings is a purely mechanical rehabilitation method.
![partielleauskleidung](https://www.rti.eu/wp-content/uploads/2016/06/partielleauskleidung.jpg)
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.
![flutungsverfahren](https://www.rti.eu/wp-content/uploads/2016/06/flutungsverfahren.jpg)
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.
Replacement and renewal methods
![Berstlining - Know und Innovation](https://www.rti.eu/wp-content/uploads/2016/08/know-how-und-innovation.jpg)
Pipe bursting
Pipe bursting technologies are used in the rehabilitation of pressure and gravity lines.
![aufweit-zieh-verfahren](https://www.rti.eu/wp-content/uploads/2016/08/aufweit-zieh-verfahren.jpg)
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.