Swagelining is a method of sliplining whereby the diameter of the PE pipe is temporarily reduced by swageing prior to insertion in the defective pipe. After insertion, the pipe is expanded by means of steam or a rerounding device. When completed, the pipe is fully, structurally renovated. Additionally, there is minimal impact on the surround area because of limited surface disruption and the relatively short installation time.
Trenchlesspedia Explains Swagelining
In this method of sliplining, a polymer lining is pulled through a pipe for rehabilitation purposes. Before installation, a high-density polyethylene (HDPE) pipe, slightly larger than the host pipe’s diameter, is selected. Upon installation, the pipe is connected to a pulling rig and pulled through a reduction die slightly smaller than the host pipe. This temporarily reduces the size of the HDPE while a section, as long as 1.5 kilometers, is pulled through the host pipe. After installation, tension is released and the HDPE lining loses length as it reverts to the full diameter of the host pipe. The flow rate is increased due to the smooth nature HPDE.