Cleaning of Pressure Pipes with Novel Technology - The Importance of Long-Term Bond

摘要

This paper presents a novel, patent-pending, "waterless" method of pressure pipe cleaning using airborne abrasives. This new method not only removes corrosion products quickly, it leaves the pipe interior in a "ready state" for the trenchless application of spray-in-place (SIPP), cured-in-place (CIPP) and/or cement linings. It also provides pipe surface preparation and dries the pipe for superior liner bond. This paper highlights the importance of pipe cleaning and preparation in advance of installing certain pressure-pipe liners and outlines the details and limitations of this new technology. Early, promising results from a recent trenchless water main rehabilitation project, in Cambridge Ontario, showed that coal-tar coatings on ductile/cast iron pipe can be removed effectively and efficiently.