Introduction
The Trelleborg DrainLiner method is a cured-in-place pipe lining (CIPP) process used in trenchless pipe and sewer rehabilitation ("no-dig" applications). The start or endpoint can be a manhole, inspection hole, or cleaning eye or an open cut pipe. It is possible to install the liner along channel diversions or negotiate bends at an angle up to 90 degrees. The basic condition is that there is enough space to place the inversion fitting of the inversion unit or water rig.
How it works
The inversion process
This process uses a flexible tube (= liner) of corrosion-proof synthetic and/or glass fibers, 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-impregnated liner in the pipe section can be cured with hot water, steam, or at ambient temperatures, depending on the resin system's requirements. The duration of the curing phase is largely dependent on the resin type and curing method you select.
The rehabilitation result
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 future's structural and hydraulic requirements. There is only a minor reduction in nominal pipe diameter.
Benefits at a Glance
Technically fully developed and proven in practice
More efficiency for open-end liner installations
Application Areas
DN 30 - DN 1200 (1.2" - 64") - Connection Angles 30°-90°
Training in Theory and Practice
Method descriptions
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Certificates
Technical Approval
Technical Approval
