epros®DrainLining

Technically fully developed and proven in practice

The rehabilitation of non-man-entry sewer lines with full-length CIPP liners has established itself as a sophisticated economical and technical alternative to traditional repair techniques involving digging up the ground.

This method is meanwhile a proven and reasonable-cost solution for the basic renovation of service lines in need of repair and thus to extend their service lives for another life cycle of at least 50 years.

A basic condition is that the materials used in CIPP operations are suitable for this type of application and that the installation process meets stringent quality criteria.

The inversion process

This process uses a flexible tube (= liner) of corrosion-proof synthetic and/or glass fibres, which is wetted inside with reaction resins and introduced into the host pipe run through a manhole, access pit or access eye with the help of an inversion unit.

During this process the liner tube is inverted, so the resin wetted liner side (inside before inversion) is turned outside, away from the effluent and forced against the pipe wall

The curing process

The resin wetted, inverted liner tube remains under pressure from the filled-in air of water until the resin is cured.

The resin-impregnated liner in the pipe section can be cured with hot water, steam or at ambient temperatures, depending on the requirements of the resin system used. The duration of the curing phase is largely dependent on the resin type and curing method you select.

The rehabilitation result

After final cure of the reaction resin, the liners form a tight positive and frictional fit with the host pipe wall.

The pipe-in-pipe system so obtained becomes an integral part of the host pipe. It forms a seal against infiltration and exfiltration, and fully restores and meets the structural and hydraulic requirements for the future. There is only a minor reduction in nominal pipe diameter.

Application Areas

Pipe run direction

Manhole to Manhole application

From the start point to the end point
From the start point to the end point by running through an intermediate manhole
From the start point into a sewer pipe run over a defined length without any further manhole or access pit needed
In case of laterals: either from a lateral start point down to the lateral/main interface or from a main line start point down to the main/lateral interface

Circular, egg-shaped and special sewer sizes

concrete
steel
reinforced concrete
clay
fibrocement
GRP, PVC, PE, PP
cast iron

Precondition: The cross section of the host sewer meets the process requirements and the structural stability criteria.

Applicable Damages

Leaks with or without groundwater infiltration or exfiltration at pipe joints, pipe walls, junctions, transitions etc.
Displaced pipes, cracks and debris, ruptures
Plugging of lateral connections no longer needed
Mechanical wear
Corrosion

Limitations