PipeDefender® engineered pipeline lagging
In Joliet Illinois, a 16 in. (406 mm) OD pipe was to be installed which would supply natural gas to a nearby power plant, involving the challenging task of boring a section under a railway. This 150-foot (50m) stretch crossed fractured flagstone, necessitating the removal of the casting pipe and filling the annulus with lightweight concrete. Recognizing the inevitable abrasion concerns during the pipe’s passage through the rock bore, the contractor sought a superior protection method beyond conventional approaches like concrete coating or wood lagging.
The solution came in the form of PipeDefender® engineered pipeline lagging, chosen to shield the pipe from the fractured rock bores continuous stresses, and potential damage while the pipe was pushed through. The contractor feared traditional separators may collapse during the pushing process as they were not strong enough to protect against that amount of compression. After the 24 in. (610 mm) diameter bore pipe was fully pushed through, a reducer was installed to connect the smaller pipe. PipeDefender® was installed over intermittent sections of stranded-style rock shield to provide frictional resistance. Each section of PipeDefender® also had twice the number of bands typically installed to ensure enough friction was being applied between the pipe and the PipeDefender® and to prevent slippage.
PipeDefender® engineered pipeline lagging was successful in protecting the pipe from abrasion and gouging along the section and stayed in position while being pushed through the bore. Additionally, The profile of PipeDefender® facilitated the seamless passage of cement fill once the pipe was installed demonstrating its versatility and efficacy in demanding applications.
Contact us to learn more about how PipeDefender® can protect your project.
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Read more about PipeSak’s help in Phase 1 of the Joliet Pipeline here