Abstract: An anchor system is shown for use with a pre-insulated piping system having an inner steel carrier pipe surrounded by a layer of insulation and then by an outer protective jacket. The anchor system includes an inner carrier pipe for insertion within the length of the piping system at a selected point. A steel anchor sleeve surrounds a portion of the length of carrier pipe and insulation. It terminates at one end at an outwardly flaring anchor plate which is subsequently embedded within a concrete anchor block. A steel end cap is welded to a second, opposite end of the sleeve and to the inner carrier pipe at a point along the length of piping which is outside the concrete anchor block and which is spaced apart from the location of the anchor plate, whereby heat from the high temperature fluids in the piping is transferred to the end cap at a location along the length of piping which is distant from the location of the anchor plate.

Abstract: An anchor system is shown for use with a pre-insulated piping system having an inner steel carrier pipe surrounded by a layer of insulation and then by an outer protective jacket. The anchor system includes an inner carrier pipe for insertion within the length of the piping system at a selected point. A steel anchor sleeve surrounds a portion of the length of carrier pipe and insulation. It terminates at one end at an outwardly flaring anchor plate which is subsequently embedded within a concrete anchor block. A steel end cap is welded to a second, opposite end of the sleeve and to the inner carrier pipe at a point along the length of piping which is outside the concrete anchor block and which is spaced apart from the location of the anchor plate, whereby heat from the high temperature fluids in the piping is transferred to the end cap at a location along the length of piping which is distant from the location of the anchor plate.

Abstract: A section of pipe is used in a pre-insulated piping system where the system is made up of lengths of insulated and jacketed pre-insulated piping. Each length of piping is made up of an inner carrier pipe having an interior surface and an exterior surface. An envelope of foamed insulation surrounds the inner pipe exterior surface and an outer protective jacket surrounds the envelope of foamed insulation. The length of piping has a joining end for joining to an adjacent length of piping, whereby the adjacent lengths of piping provide a continuous length of fluid conduit for conveying high temperature fluids. A heat dissipating element surrounds the inner carrier pipe for at least a portion of the length thereof. The heat dissipating element is itself insulated, 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.

Abstract: An expansion joint is shown for an insulated pipeline used to convey high temperature fluids such as steam. The expansion joint uses a flexible bellows and additional insulating and joining components to provide a watertight encasement for a traditional metal expansion joint. The bellows arrangement compensates for any relative movement of the inner fluid conveying pipes with respect to the outer layers of insulating material and outer jacket in order to protect the integrity of the assembly and prevent the intrusion of water or other contaminants which could lead to corrosion or early failure of the piping system.

Abstract: A section of pipe is used in a pre-insulated piping system where the system is made up of lengths of insulated and jacketed pre-insulated piping. Each length of piping is made up of an inner carrier pipe having an interior surface and an exterior surface. An envelope of foamed insulation surrounds the inner pipe exterior surface and an outer protective jacket surrounds the envelope of foamed insulation. The length of piping has a joining end for joining to an adjacent length of piping, whereby the adjacent lengths of piping provide a continuous length of fluid conduit for conveying high temperature fluids. A heat dissipating element surrounds the inner carrier pipe for at least a portion of the length thereof. The heat dissipating element is itself insulated, 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.

Abstract: A method is shown for providing status detection, in particular leak detection, in a pre-insulated pipeline for the transportation of media, in particular, steam or hot water. The pipeline has an inner medium-carrying pipe, a surrounding heat-insulating layer of bonded foam, and an outer protective polyolefin jacket. A special length of polymer coated wire is included as a part of the normal bare conductor wire which is used as a part of the electrical sensing system of the pipeline and is used to by-pass various obstructions in the foamed insulation of the pipeline. The insulated length of the coated wire is heat fused at points of egress and ingress through the outer polymeric jacket with the compatible materials of the coated wire and jacket forming a water tight seal.

Abstract: An installation technique is shown for use with a pre-insulated steam piping system having an inner steel carrier pipe surrounded by a layer of foam insulation and then by an outer protective jacket. An expansion loop is used to create an artificial low point in the overall pipeline which allows the pipeline to avoid a buried obstruction without the necessity of increasing the depth of the remaining portion of the pipeline on either side of the loop. The expansion loop has a pair of oppositely arranged side legs which are joined by a cross-leg portion of the loop, the cross-leg portion of the loop being angled downwardly at a predetermined angle, to thereby provide a change in elevation which avoids the buried obstruction in the pathway of the pipeline.

Abstract: An anchor system is shown for use with a pre-insulated piping system having an inner steel carrier pipe surrounded by a layer of insulation and then by an outer protective jacket. The anchor system includes an inner carrier pipe for insertion within the length of the piping system at a selected point. A steel anchor sleeve surrounds a portion of the length of carrier pipe and insulation. It terminates at one end at an outwardly flaring anchor plate which is subsequently embedded within a concrete anchor block. A steel end cap is welded to a second, opposite end of the sleeve and to the inner carrier pipe at a point along the length of piping which is outside the concrete anchor block and which is spaced apart from the location of the anchor plate, whereby heat from the high temperature fluids in the piping is transferred to the end cap at a location along the length of piping which is distant from the location of the anchor plate.

Abstract: An flexible coupling is shown for an insulated piping system of the type used to convey steam and other high temperature fluids. The coupling uses a flexible bellows and additional insulating and joining components to couple conventional lengths of insulated pipe. The bellows arrangement compensates for any relative movement of the inner fluid conveying pipes with respect to the outer layers of insulating material and outer jacket in order to protect the integrity of the assembly and prevent the intrusion of water or other contaminants which could lead to corrosion or early failure of the piping system.

Abstract: A high temperature pre-insulated pipe system is shown which can withstand conveyance temperatures in excess of 250° F. The pipe system includes a first and second length of insulated and jacketed pipe. Each pipe length includes an inner metal pipe having an interior surface and an exterior surface and having an envelope of foamed insulation surrounding the inner pipe exterior surface. A thermally protective coating layer is applied between the metal pipe exterior and the surrounding layer of foamed insulation. The thermally protective layer effectively lowers the interface temperature between the inner metal pipe and outer foamed layer to prevent disbondment of the outer foamed layer as the temperature of the inner pipe increases.

Abstract: A high temperature pre-insulated piping system is shown which can withstand conveyance temperatures in excess of 250° F. The piping system includes a first and second length of insulated and jacketed pipe. Each pipe length includes an inner metal pipe having an interior surface and an exterior surface and having an envelope of foamed insulation surrounding the inner pipe exterior surface. A special release agent is applied between the metal pipe exterior and the surrounding layer of foamed insulation. The release agent causes intentional disbondment of the foamed insulation layer from the inner metal pipes under certain conditions of environmental stress.

Abstract: A high temperature pre-insulated piping system is shown which has a special water stop located along the length of the piping. The water stop has an internal disk which forms a pair of isolated chambers within the water stop. The internal disk is formed of a material which is impervious to the flow of water. As a result, the two internal chambers are isolated from one another and act as isolating elements to contain any breach in the exterior of the piping system to a specific location in the length of the pipe string.

Abstract: A high temperature pre-insulated piping system is shown which has a special water stop located along the length of the piping. The water stop has an internal disk which forms a pair of isolated regions within the water stop. The internal disk is formed of a material which is impervious to the flow of water. As a result, the two internal regions are isolated from one another and act as isolating elements to contain any breach in the exterior of the piping system to a specific location in the length of the pipe string.