Patent ID: 7032621
Filing Date: 2006-04-25
Classification: F16L

Abstract:
1. An insulated piping system for conveying high temperature fluids, comprising: a first and second length of insulated and jacketed pipe, each having a joining end to be joined to an end of the other length, each pipe length comprising an inner carrier pipe having an interior surface and an exterior surface, an envelope of foamed insulation surrounding the innerpipe exterior surface, and an outer protective jacket surrounding the envelope of insulation, the joining ends of adjacent pipe lengths being welded together to form fixed joints, whereby the adjacent pipe lengths provide a continuous fluid conduit for conveying high temperature fluids; wherein a special release agent is applied to at least selected locations on the exterior surface of the inner carrier pipes and wherein the envelope of foamed insulation is then applied over the release agent, the release agent being selected to intentionally fail at conditions of predetermined environmental stress, so that the disbondment of the surrounding envelope of insulation from the inner carrier pipes occurs in a predictable, uniform fashion rather than in a haphazard fashion.