Pipe-Relining

In-house Rehabilitation for sewage pipes

Ever heard of the Pipe-in-Pipe Method?

In the context of low-damage pipe rehabilitation, the existing sewage pipes serve as supports and moulds for the new pipes. Within a short time, a new drainage pipe is created in the old pipe.

This method enables an efficient and quick renewal of the sewage system without the need for extensive removal of the old pipes. All the work involved in conventional pipe rehabilitation is eliminated, such as opening and closing walls, ceilings and floors. This makes the Pipe-in-Pipe Method not only more economical, but also more sustainable, as construction waste is reduced and pollutant emissions are cut.

The method can be used:

For all pipe materials, whether cast, SML, HT, KG, Loro X or fibre cement
For nominal diameters from DN 40 to 200 in large and complex buildings
For leaking connections, holes, radial and longitudinal cracks and corrosion damage
For downpipes, residential connections, house connection pipes and rainwater pipes

State-of-the-art technology

Thanks to the short hardening time of the material, pipe rehabilitation with rohrgroup enables extremely fast sewage pipe rehabilitation. The drying time is only three to five minutes per layer. With a total of two to four layers, the new, inner pipe is made to be two to three millimetres thick. This coating has its own structure and behaves like a new pipe.

The pipe rehabilitation process

Pipe rehabilitation with rohrgroup begins with an inventory, during which both the damage to and in the old sewage pipe and the structural conditions of the property are inspected. The project is then professionally executed in a total of four steps:

Step 1

Conditions assessment

To start, we carry out a camera inspection. This gives us a precise overview of the current condition of the sewage system and allows us to prepare a condition report for you, as well as the corresponding quote.

Step 2

Pipe cleaning

The next step is the pipe cleaning, during which debris and build-up are removed. By doing this, we restore the pipe to its original diameter. We then carry out another camera inspection, as finding all the damage only becomes possible when the pipes are clean.

Step 3

Pipe Relining

A combined spraying and spinning process is used to rehabilitate the old sewage pipes. A new and stable sewage pipe is created in several spray layers with short drying times between each layer.

Step 4

Documentation

Finally, we carry out another inspection of the rehabilitated renovated pipes using a camera. This step serves as quality assurance and project documentation, both for us and for our customers. Once the inspection has been completed, the Pipe-in-Pipe Method is complete.

Material and Products

Like a new sewage pipe

The material is a modified polyurethane-based resin specially developed for the on-site rehabilitation of sewage pipes. It meets all the requirements and standards needed for effective pipe rehabilitation.

The material has been specifically developed to offer optimum properties for the rehabilitation of sewage pipes and is therefore a high-quality solution for this type of application.

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