Patent ID: 8468677
Filing Date: 2013-06-25
Classification: F16L,F24F,F28F,Y10T

Abstract:
1. A method of limiting water damage in a section of pre-insulated piping used in a pre-insulated piping system, the section of piping having an inner metal carrier pipe for conveying hot fluids, a surrounding layer of foam insulation and an outer protective jacket, which method contains the ingress of water or other contaminants in the case of a breach in the outer jacket, the method comprising the steps of: providing 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 metal pipe having an interior surface and an exterior surface; locating a heat dissipating element about the exterior surface of the inner carrier pipe along at least a portion of the length thereof; applying an envelope of foamed insulation about the inner carrier pipe and about the heat dissipating element so that the envelope surrounds the exterior surface of the inner carrier pipe; enclosing the layer of foamed insulation with an outer protective jacket which surrounds the envelope of insulation; welding together adjacent joining ends of adjacent pipe lengths to form fixed joints, whereby the adjacent pipe lengths provide a continuous fluid conduit for conveying high temperature fluids; the heat dissipating element itself being insulated by the foam insulation, whereby any water which penetrates the outer protective jacket contacts the heat dissipating element and is cooled below boiling before traveling any significant distance along the length of the section of piping.