Patent ID: 7028717
Filing Date: 2006-04-18
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 steel carrier pipe having an interior surface and an exterior surface, an envelope of foamed insulation surrounding the inner pipe 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 length of fluid conduit for conveying high temperature fluids; a special water stop comprising an outer protective jacket with opposing outer extents which are joined to the respective protective jackets of the respective pipe lengths being coupled thereby, the water stop also located at a selected location within the length of the piping system, the water stop comprising a centrally located disk which is fixedly joined to the inner carrier pipe generally perpendicular thereto at a selected location and which extends radially outward toward the outer protective jacket, the centrally located disk being formed of a material which is impervious to the passage of water; wherein the protective jackets are formed from a synthetic polyolefin.