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

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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.

Liner Curing process Schema

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 resin system's requirements. The duration of the curing phase is largely dependent on the resin type and curing method you select.
CIPP Liner rehab result

The rehabilitation result

After the reaction resin's final cure, 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 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

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.

More efficiency for open-end liner installations

Using the specific LinerEndCap method will make your job easier and quicker: in just one step and without the need of an additional calibration hose, the wetted liner can be inverted and installed. With the LinerEndCap applicated previously to the liner end with a special adhesive, the Liner will be closed for the period of installation. So the user can set up the liner with the required pressure until the resin has cured. After the liner installation and complete heating and cooling phase, the LinerEndCap can be removed with the inversion rope from the cured liner and away from the line. Additional milling is not necessary. 
 

Application Areas

DN 30 - DN 1200 (1.2" - 64") - Connection Angles 30°-90°

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
  • cement 
  • 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

  • extreme pipe or joint offsets
  • broken or collapsed pipes
  • large cross-sectional reductions in conjunction with bedding problems
  • longitudinal cracks at pipe connections
 

Training in Theory and Practice

Training on theory and practice

Good practice-oriented training of our installers is a major concern for us and a component of our quality management approach.

Only qualified professionals with training are permitted to use our systems. Qualified personnel will be issued with a training certificate by Trelleborg Pipe Seals.

Method descriptions 

We place particular emphasis on teaching the correct practical application in conformity with the technically approved requirements, entirely documented in our user manuals/method descriptions, which are the basis for the official technical approvals.

Certificates

Technical Approval

No. Z-42.3-488
DN 50 to DN 200

DrainLiner method in buildings
 

with EpoxyResin 
Types HC60, HC120, HC120+
Download approval

Technical Approval

No. Z-42.3-468
DN 100 to DN 600

DrainLiner method
MtH method

with EpoxyResin 
Types HC120 / HC 120+
Download approval
Related products / information
Technical Equipment, Consumables
Trelleborg CIPP Liners & Calibration Hoses
En savoir plus
Trelleborg Epoxy Resin Systems
En savoir plus
Installation Equipment
En savoir plus
Curing Units
En savoir plus
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