Pipeline Rehabilitation


Trenchless pipeline rehabilitation utilises a combination of equipment, materials, and techniques to cost effectively rehabilitate and renew existing potable water and sewer pipeline infrastructure. As this method requires little to no excavation there is minimal disruption to busy commercial and residential areas.

The Schur Pipe Lining Rig used for spray-applied lining provides state of the art computerized control systems, which ensures that the resin is applied in accordance with the manufacturer’s recommendations. These systems include:

  • Continuous monitoring and logging of the pump pressures, the resin mix ratio, volume of product pumped.
  • Length of the main being lined.
  • Speed of winching and thickness of the lining.

This data is recorded on hard copy printouts and is a key element of the project documentation and quality assurance. This data is also sent as an email from the rig.

If any of the above items fall outside pre-determined limits then audible alarms will sound. The rig will automatically shutdown if a mix ratio error of +- 10% is registered.

Prior to commencing every lining the rig operator performs a series of manual quality assurance checks to determine the resin temperature, pump flow rates and the correct operation of the lining rig and monitoring systems. Only after these checks have been satisfactorily completed will the lining hoses be winched through the main, to the access pit at the far end of the length to be lined, where the lining head and static mixer will be attached to the hose.

The resin is heated within the rig and is pumped to the application spinner head through heated umbilical hoses which ensure that the resin temperature and viscosity do not reduce over the length of the hose causing blockages or increased pumping pressures.

The two parts of the resin are kept separate until the last 1m of the lining hose when it passes through a static mixer that ensures full mixing of the two liquids prior to reaching the spinner head. As a final quality assurance check prior to lining the spinner head is allowed to spin-up for 1-2 minutes which will ensure that the correct mix ratio has been achieved. At this time a resin sample is taken and will be used by the client as a quality control check on the resin mix.

The lining hoses and spinner head are then winched back through the main at a constant speed and an even coating of product is applied to the inside of the pipe wall. This is controlled automatically. On completion of pipe lining, and after removal of the spinner head from the main, another mixed resin sample is taken to provide a further quality control check.

After curing and performing a further CCTV inspection of the main, to ensure that there are no significant defects within the lining, the main will be disinfected and flushed prior to reconnection of the services and removal of the temporary bypass.

Schur have been designing and manufacturing pipe lining systems for 40 years and have sold more systems for epoxy spraylining than any other company in the world. Our innovative pipe lining systems and equipment are used by municipalities and engineering contractors all over the world to reduce the cost and downtime associated with pipeline rehabilitation.

To discuss your pipeline rehabilitation project please contact us on +44(0)1706 222822 or use the form provided here to request a call back.

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