Drain lining technology
Wednesday, December 21st, 2011Drainage pipes can become damaged or misaligned after years of use. This can be quite common and can usually be put down to age or ground movement. When this happens a drainage company has one of two options. Either they can excavate a section of the pipe to instigate a repair or they can insert a pipe liner into the pipe so the cracks or other damage are covered.
Drain lining technology has improved drastically over the last few years and now even pipe runs of up to 80 metres can be lined quite successfully with no loss of waste carrying capacity. For large diameter pipes run lengths will be reduced, but pipe integrity will still be restored.
To reline straight sections of pipe the best technology to use is a polyester resin felt liner, whereas if the pipe deviates in any way epoxy flexi line is the preferred method. When the liner is inserted into the pipe into the correct position, air is used to inflate the liner to the same internal diameter as the pipe. Because the liner is impregnated with resin, when it cures, it provides an effective seal against any liquid escaping from the repaired section of pipe.




