Abstract: A flexible hose for conveying fluids and suitable for high temperature environments, in one embodiment the hose assembly comprises a thermal paint coated nipple, a core tube, a thermal insulating layer surrounding the core tube, a cover layer surrounding the thermal insulating layer, and a vented jacket surrounding the cover layer. The thermal insulating layer may be a fibrous material such as a silica fiber. The cover layer may be thermally stable up to 750° F. or higher. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.

Abstract: The invention relates to a cold-insulated fixed-point pipe support for a low-temperature pipeline which includes an insulating system arranged between an outer shell and a supportable low-temperature pipeline having solid thermal insulating material which thermally insulates the pipeline from the low-temperature environment. A rotation-preventing and displacement-preventing device prevents rotation and displacement of the thermal insulating material with respect to the pipeline and an outer shell. A fixed-point pipe support is adapted to be fitted and removed in a substantially radial direction over the pipeline, and has at least one division with respect to shape with a division plane thereof extending perpendicular to a cross-sectional plane, and having a connecting device for releasable connecting and fixing shaped parts formed by the division.

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 foam 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 foamed 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: The foam tube for pipe insulations has an external surface and an internal surface. The internal surface is provided with an adhesively bonded layer of fibers. The fibers are a material having a melt temperature that is higher than that of the polymeric foam. The fibers are adhesively bonded to the internal surface such as to stand up from the internal surface. The fibers are substantially uniformly distributed over the internal surface providing a surface coverage of 2 to 20 percent. Further, the fibers have a linear density of 0.5 to 25 dtex and a length of 0.2 to 5 mm. With this fiber layer the polymeric foam tube has an improved thermal resistance and thermal conductivity.

Abstract: Method of assembling a vacuum insulated piping run for conducting a cryogenic fluid in which piping sections are produced in a first location and then assembled in a second location into a piping run. Each of the piping sections incorporates an outer cylindrical casing and an inner pipe for transport of the cryogenic fluid to form an inner annular region for containing insulation that can be radiation shield insulation and aerogel blankets. The piping sections are joined by welding the ends of the inner pipes together and then joining the outer cylindrical casing by a shell-like section. Points of connections are tested by vacuum testing techniques as each of the connections is made. Thereafter, the annular region is purged with a condensable gas such as carbon dioxide and subjected to a subatmospheric pressure.

Abstract: An insulating complex having a metal case and insulating material confined in a vacuum between the inner wall and the outer wall of the case and wherein each of the walls has a metal strip, at least one of which includes corrugations. An insulated pipe and a set of two coaxial pipes are also provided wherein the coaxial pipes are arranged as an inner pipe and an outer pipe, preferably undersea pipes for great depths.

Abstract: A tubular duct member comprises a plurality of sheet metal panels 10, 12 joined along adjacent longitudinal edges by cooperating folded sheet metal catches 14, 16, the catches being pushed together such that respective detent surfaces 28, 30 on each catch engage behind one another to retain the edges of the sheets together. One of the catches 14 includes a body 36 of resilient material compressed between the catches and biasing the catches apart to maintain the detent surfaces 28, 30 bearing against one another.

Abstract: An insulating apparatus for use with vacuum insulated tubing sting to reduce heat loss through the joints, where the apparatus includes an insulator adapted to surround the joint and a latching joint protector adapted to surround the insulator and hold the insulator against the joint, where the protector also includes a channel for receiving injection and/or control tubing. The insulator is capable of reducing heat loss through the joints of a vacuum insulated tubing string by as much as 95%.

Abstract: An insulating material is fed in and shaped by superposing a plurality of N layers Ci (3) of the insulating material. For each layer Ci, a plurality of ni, axial insulating elements Ei precut from the insulating material is formed, a rough form of the tubular insulating device is formed by using an adhesive to assemble the Ni elements Ei of each layer Ci which are juxtaposed along a plurality of joining zones Ji, so that the plurality of joining zones Ji+1 of a layer Ci+1 is offset relative to the plurality of joining zones Ji, of the adjacent layer Ci. Then, by the adhesive is polymerized, and the tubular element rough form is subjected to a heat treatment. The method is economical and makes it possible to obtain a device of high mechanical strength.

Abstract: The present invention provides a subsea transfer system for cryogenic fluids comprising reinforced concrete conduits (RCC), and stationary rollers that are anchored to the bottom of RCC, and one or more pipe-in-pipe that is supported on rollers along with insulation in the annulus. Each RCC is pre-cast with spigot and bell ends, and fits together with rubber gasket/sealant at joints. RCCs are installed first to form a dry path for pipeline(s). Once the RCC and stationary rollers are installed, a cryogenic pipeline having pipe-in-pipe configuration is then pulled into the RCC through and supported on the stationary rollers. As such a robust RCC protected pipe-in-pipe system for transfer of cryogenic fluids under water are established.

Abstract: The present invention relates to a coaxial pipe element comprising an inner pipe and an outer pipe and having at each of its ends a closure of the annular space between these two pipes, in particular by means of a forging, and in which said inner pipe is subjected to traction stress.

Abstract: This specification and the resources and research attach hereto provide the basis for a low cost high efficiency low emissive flex duct for air distribution especially where it pertains to the HVAC trade in buildings. The reflective radiant material used in this invention is already certified by energy star for current applications and increases the energy efficiency of a structure as well as the health of those persons or beings dwelling, residing, or working with in said structure. The manufacturing process is also efficient in that manufacturers of current/preexisting duct can use the same machines and processes with only a change of material.

Abstract: The present invention is directed to an insulation shroud with internal support structure. In one illustrative embodiment, the insulation shroud includes a body adapted to be positioned around a subsea component, the body including an insulating material having an internal support structure positioned therein and a door.

Abstract: An apparatus for thermally hygrometrically processing and conditioning air for classified environments and preparing foods, characterized in that said apparatus comprises a stainless steel inner bottom and monolithic thermally insulated panels, said panels comprising an outer wall and an inner wall therebetween a thermally insulating material is arranged.

Abstract: A flexible duct including: a first, inner layer that includes multiple helical windings of a strip of thin flexible material; a second layer overlying and adhered to the first, inner layer and including multiple helical windings of a tube containing insulating material; and a helically wound reinforcing element.

Abstract: A vehicle exhaust component includes an outer shell defining an internal cavity and at least one internal pipe located within the internal cavity. A wire tube surrounds the internal pipe and is spaced apart from the pipe by a radial gap. This radial gap is filled with a fiber material.

Abstract: This invention relates to a pipeline assembly especially for offshore installation comprising an inner carrier pipe, a casing and at least one closed-cell and/or solid thermal insulation material layer placed in between the casing and the inner carrier pipe, and the at least one insulation layer being directly or indirectly bonded to at least the casing and the inner carrier pipe. The pipeline assembly has improved bending properties which is achieved as the insulation material layer comprises at least one slit substantially transversely to the longitudinal direction of the pipeline assembly. The slit can be applied as a helical or circumferential cut, enabling the pipeline assembly to be rolled onto a reel or spool which greatly improves the pipeline assembly installation process. Methods of improving the bending properties of such a pipeline assembly are also described.

Abstract: A rotary fibrous insulation product for use as flexible duct media is provided. The fibrous insulation product includes a fibrous insulation pack that is at least partially coated on one major surface with a phosphorus coating layer. The phosphorus coating layer may be formed of one or more phosphorus-containing compound that forms a protective coating over the fibrous pack when sufficient heat is applied. In exemplary embodiments, mono-aluminum phosphate is applied to a major surface of the fibrous pack. The phosphorus-containing compound may be applied to the surface of the fibrous pack in an amount from about 3.0 g P/m2 to about 10.0 g P/m2. In an alternate embodiment, the phosphorus-containing compound is distributed throughout the insulation pack. A flexible insulated duct formed from the fibrous insulation product is also provided. The flexible insulated duct meets the UL-181 Standard flame penetration test without the need for a scrim layer.

Abstract: An insulating panel for a conditioned-air distribution duct, a distribution duct including at least one insulating panel, a method for manufacturing a distribution duct using at least one insulating panel, and to an instrument for cutting the panel. The insulating panel includes at least one insulating core based on mineral wool, preferably on rock wool, and possibly including an exterior layer, for example based on a thin skin of aluminum. On one exterior face a plurality of marks are provided that are straight and oblique with respect to a longitudinal direction of the panel, the marks forming two sets of opposing inclinations oriented at an angle with respect to the longitudinal direction.

Abstract: A facing laminate for insulation products includes: a foil or metallized polymeric film sheet layer forming an inner layer of the laminate that is adapted be bonded directly to a surface of an insulation product; a paper composite sheet layer, which may include synthetic and/or inorganic fibers, forming an outer exposed layer of the laminate; and a scrim intermediate and bonded to the foil or metallized polymeric film sheet and paper composite sheet layers. The facing laminate may include a humectant and/or a water, oil, and/or grease repellant component. The paper composite sheet layer of the laminate exhibits greater dimensional stability and reduced wrinkling when the laminate is exposed to conditions of high humidity. Insulation products to be faced with this facing laminate include pipe insulation, duct board, duct wrap insulation, metal building insulation, and other building insulation products.

Abstract: A heat tracing device has one or more heating elements positioned adjacent to a heatable surface, an aerogel high temperature insulation layer adjacent to the one or more heating elements, a low temperature insulation layer adjacent to the aerogel high temperature insulation layer and a locking mechanism effective to fix the position of the low temperature insulation layer to the aerogel high temperature insulation layer.

Abstract: A pipe comprising an outer rigid conduit and an inner tubular structure, the inner tubular structure comprising a flexible hose, wherein the hose comprises a tubular body disposed between inner and outer gripping members, the tubular body including a sealing layer, and being formed of a material capable of withstanding cryogenic temperatures, wherein the inner tubular structure has insulation properties sufficient to protect the outer conduit from the low temperature of cryogenic fluid flowing within the inner tubular structure.

Abstract: A subsea insulation device is described. The device includes a frame coupled to and at least partially enclosing a subsea component. A bag may be at least partially enclosed in the frame. The bag may substantially seal against at least one surface of the subsea component when the bag is at least partially inflated. A port may be attached to the bag. The port may allow the bag to be coupled to a fluid provider connector so that fluid can be provided into the bag to inflate the bag.

Abstract: A tube clip is mounted to a channel-section track and is used to secure a pipe. The channel-section track includes a pair of upper engagement surfaces having inwardly turned flanges spaced apart by a slot. The tube clip includes an integrally molded, one-piece elongated cylindrical body that extends along a first axis and defines a center bore for receiving the pipe therethrough. A base is fixedly secured to the cylindrical body and includes a pair of support surfaces spaced apart along the first axis. Each support surface includes a fin for engaging one of the upper engagement surfaces of the channel-section track to bias the tube clip therefrom. A pair of flexible legs extends from the base portion. The legs are spaced apart along the first axis and each leg is adapted to selectively lockingly engage one of the flanges when the tube clip is mounted to the channel-section track.

Abstract: An angular insulated duct section and method for insulating and forming same is provided. A multi-layer composite sheet is provided, including a first duct layer of sheet metal having two opposed surfaces. On one of the sheet metal surfaces is attached a viscoelastic foam sheet layer. The foam sheet layer includes at least one of (A) a viscoelastic open-cell foam layer, or (B) a viscoelastic formally closed-cell foam layer in which at least a portion of closed cells therein has been opened. A substantially linear corner bend is formed in the composite sheet so as to form the angular insulated duct section with the sheet metal layer on an outside thereof and the foam sheet layer on an inside thereof. The corner bend is formed without substantial at least one of distortion or deformation of the multi-layer composite sheet adjacent the bend.

Abstract: A motor vehicle exhaust pipe includes: an outer metal tube; at least one inner tube made from an inorganic matrix composite material and disposed inside the outer metal tube, each inner tube being arranged longitudinally and having a pre-determined longitudinal length and a gap being provided between each inner tube and the outer tube; and elements for maintaining each inner tube in position in relation to the outer tube. The elements for maintaining each inner tube in position in relation to the outer tube include at least one retaining element disposed in the gap between the inner tube and the outer tube, each retaining element exerting a minimum pressure of between 10?4 MPa and 10?1 MPa on the inner tube. All of the elements used to maintain one inner tube in position have a cumulative longitudinal length equal to less than half of the longitudinal length of the inner tube.

Abstract: A flexible, composite duct insulation structure includes a first layer forming an insulation layer, and a magnetic layer or strips for holding the insulation layer against a ferrous metal duct surface.

Abstract: A flexible HVAC duct is made with a support structure-containing duct liner, insulation layer, and reinforcing layer-containing vapor barrier. At least the duct liner and vapor barrier are constructed of polymer materials that enable them to be placed in the same recycling stream once the flexible HVAC duct is removed from its installed location. The insulation layer can also be made of a polymer material compatible with that used for the duct liner and vapor barrier so that the entire duct can be recycled once removed.

Abstract: The present invention provides a covering member including: a surrounding member including a heat insulating material and having a heat generating member or a heat insulating function, the surrounding member being wound from an open state so as to cover an object; and a fixing unit including: an engagement member including: a ring including a heat resistant elastic material; and a hook fitted to the ring; a holding member disposed on one end of the surrounding member, the holding member fastening the ring of the engagement member to hold the engagement member; and a receiving member disposed on one end of the surrounding member so as to correspond to the holding member, the receiving member including a receiving metal fitting to be engaged with the hook of the engagement member.

Abstract: An insulated pipe concealer is provided comprising an elongated plastic pipe sleeve with a left side and right side pivotally connected to each other and adapted to close. An elongated insulation element is found inside the pipe sleeve with a channel adapted to receive a pipe. Latches for fastening the two sides of the pipe sleeve together; and hinged flaps adapted for attachment to a wall are attached to the exterior of the pipe sleeve. This pipe concealer is particularly useful in covering refrigeration pipes found on building exteriors.

Abstract: A piping element (1) comprises at least one flow pipe (4), an insulator (3) arranged outside it and a corrugated outer sheath (2) arranged outside the insulator (3) in such a way that the piping element (1) is bendable in its entirety. The outer diameter of the insulator (3) is reduced before conducting it to a corrugator (13) inside the outer sheath (2). In the corrugator (13), the insulator (3) reverts towards its larger outer diameter. The free outer diameter of the insulator layer is formed larger than the smallest inner diameter of the outer sheath (2).

Abstract: A facing laminate for insulation products includes: a foil or metallized polymeric film sheet layer forming an inner layer of the laminate that is adapted be bonded directly to a surface of an insulation product; a paper composite sheet layer, which may include synthetic and/or inorganic fibers, forming an outer exposed layer of the laminate; and a scrim intermediate and bonded to the foil or metallized polymeric film sheet and paper composite sheet layers. The facing laminate may include a humectant and/or a water, oil, and/or grease repellant component. The paper composite sheet layer of the laminate exhibits greater dimensional stability and reduced wrinkling when the laminate is exposed to conditions of high humidity. Insulation products to be faced with this facing laminate include pipe insulation, duct board, duct wrap insulation, metal building insulation, and other building insulation products.

Abstract: The invention relates to an insulating device containing a first machine element, in particular an exhaust gas pipe, and at least one second machine element, in particular an exhaust manifold, that is connected to said first machine element and through which, in particular, a hot medium can flow and being connected to a unit. The insulating device at least partially surrounds the machine element and is connected to the unit. The aim of the invention is to further develop the claimed insulating device with a low amount of production and material expenditure such that mounting and demounting can be carried out in a simple manner and can be adapted in a problem-free manner to various types of units.

Abstract: A wrappable, styrenic thermal insulation product for application to flexible, armoured pipe is in the form of an elongate tape of generally rectangular cross-section, optionally being provided with interlocking and/or overlapping portions so as to provide a continuous insulating layer when one or more layers of the tape are wound around the pipe. The interlocking and/or overlapping portions may be of various configurations. The tape is comprised of polystyrene or a styrene-based thermoplastic having high compressive creep resistance, high compressive strength and low thermal conductivity and may be foamed or unfoamed. A flexible, armoured pipe incorporates one or more layers of the wrappable, styrenic thermal insulation product between an outer armour layer and an outer polymeric sheath.

Abstract: A semi-rigid, flexible duct including a pair of coaxial sleeves, namely an inner sleeve and an outer sleeve disposed parallel to and about the inner sleeve and a resilient wound element disposed between the sleeves. Each of the inner sleeve and the outer sleeve constitutes an aluminum foil ribbon. The wound element imparts corrugations to the two sleeves, such that the duct is extendible between a compacted configuration suitable for storage and for shipping and an extended configuration suitable for installation in a gas transport arrangement. Both the inner sleeve and the outer sleeve are of a predetermined thickness rendering the duct substantially rigid when in an extended configuration and enabling the duct to maintain its substantial rigidity upon extension from a compacted configuration. Optionally, at least one of the sleeves further includes a second, plastic layer bonded to the aluminum foil ribbon layer.

Abstract: The present invention provides an insulated pipe comprising a pipe and a composite insulation system, said composite insulation system comprising: (a) a first insulation layer comprising a first insulation material having a thermal conductivity k-factor value of less than 0.023 W/m-K at 38° C.; and (b) at least one additional insulation layer comprising an insulation material having a thermal conductivity k-factor greater than that of the first insulation material and a maximum operating temperature limit less than that of the first insulation layer. The composite insulation system is bonded to an exterior surface of the pipe with the first insulation layer facing towards said exterior surface of the pipe. At least one of said first insulation layer or said at least one additional layer extends continuously about the exterior surface of the pipe. The present invention further provides an insulated pipe for use in an undersea pipeline and an insulated pipe for use in a subterranean pipeline.

Abstract: A method for repairing/strengthening and crack arrest of pipe, especially metal pipe, in which, first, to cover an insulated material on the position needing repairing/strengthening and crack arrest, then to lay a high strength fiber composite material. The modulus of elasticity of the material used in the invention is close to the metal pipe's, it can be integrated with the pipe and bear the internal pressure with the pipe, thus the final composite pipe reaches required bear capacity, such as, the original most operation pressure of pipe can be recovered; and it can take effect for crack arrest of pipes when pipes happen burst accident. Otherwise, because of the insulated material is used on the bottom layer, it prevent thoroughly from galvanic corrosion between pipe and strengthening material.

Abstract: A durable, semi-rigid, flexible duct including a pair of coaxial sleeves, namely an inner sleeve and an outer sleeve disposed parallel to and about the inner sleeve and a resilient wound element disposed between the sleeves. Each of the inner sleeve and the outer sleeve constitutes an aluminum foil ribbon. The wound element imparts corrugations to the two sleeves, such that the duct is extendible between a compacted configuration suitable for storage and for shipping and an extended configuration suitable for installation in a gas transport arrangement. Closely and evenly-spaced ridges that are situated in between the corrugations, add rigidity and durability to the duct. Both the inner sleeve and the outer sleeve are of a predetermined thickness rendering the duct substantially rigid when in an extended configuration and enabling the duct to maintain its substantial rigidity upon extension from a compacted configuration.

Abstract: A flexible hose for conveying fluids and suitable for high temperature environments, the hose comprising a core tube, a thermal insulating layer surrounding the core tube, a metal layer surrounding the thermal insulating layer, and a vented jacket surrounding the cover layer. The thermal insulating layer may be a fibrous material such as a silica fiber. The metal layer may also be a chemical resistant layer and be thermally stable up to at least about 550° F. The vented jacket may be a wire braid having interstices therein and formed from a corrosion resistant material.

Abstract: An insulated article having a first insulation region comprising a first polymeric material and first hollow ceramic microspheres and a second insulation region comprising a second polymeric material and second hollow ceramic microspheres. The first insulation region has a thermal conductivity that is no greater than the thermal conductivity of the first polymeric material and a volumetric heat capacity in a range of 60% to 90% of the volumetric heat capacity of the first polymeric material. The second insulation region has a thermal conductivity that is no greater than 90% of the thermal conductivity of the second polymeric material and a volumetric heat capacity that is less than 60% of the volumetric heat capacity of the second polymeric material. A method for making a composition for insulating an article is also described.

Abstract: The invention relates to a covering device, preferably for post-isolating the connection point of pipes, in particular district heating pipes. Said device comprises at least two cover shells (1, 2) which surround the pipes in the mounted state, and at least one connection means (3) for connecting the cover shells (1,2). The connection means (3) comprise at least one substantially hook-shaped engaging section (4) that is provided for a positive fit connection, at least in parts, having at least one maintaining section (5) enabling the covering shells to be braced against one another. A sealing element (14) is arranged between the covering device and a pipe, in the mounted state, and surrounds the pipe.

Abstract: An installation (1) for continuous application of thermally or electrically insulating material (6) around an elongate element (2) having a generally circular cross-section. The installation includes a forcing device (3), in form of a conical tube into which the element (2) is fed simultaneously at the large base end of the conical tube, a sheet (4), on which the insulating material (6) is placed, means for translation of the element through a circular section (2) of the sheet (4), and a device (7) for depositing of insulating material onto the sheet. Such an installation produces thermally insulated tubes or electrically insulated cables.

Abstract: A method for manufacturing an insulated duct segment includes the step of forming an inner duct that has an inner duct cross-sectional area and an inner duct length. An outer duct with an outer duct cross-sectional area and an outer duct length is also formed. The method further includes the step of placing the inner duct inside the outer duct such that an annular space is formed between the inner duct and the outer duct. Finally, fluidized insulating material is injected into the annular space.

Abstract: The present invention relates to a method for producing ductwork connecting components (1) preferably for air-handling systems. The essence of the invention lies in that providing a foam-related material made of chemically cross-linked polyolefine with closed cell-structure, preparing the pattern (4) of a connecting component from a foam-sheet of polyolefine, cutting out the pattern and forming the final shape of the connecting component by welding the corresponding edges. The present invention relates further on to connecting components prepared according to the method of the invention. The invention also relates to an air-handling system using the connecting components of the invention.

Abstract: An intermediate insulating product (20) is disclosed comprising a planar insulating layer (11) having a top side in to which is formed a plurality of parallel channels (14) having cross-sections with tapered sides. A vapour proof layer (18) is applied to the top surface after the channels (14) have been formed such that the vapour proof layer (18) bridges the plurality of parallel channels (14). The intermediate insulating product (20) is then bent with mechanical manipulation in regions adjacent the bottom of the channels (14) thereby causing the channels (14) to close to form a non-planar, derivative insulated ductwork product (30) and the vapour proof layer (18) forms a vapour proof inner lining to the derivative insulated ductwork product (30).

Abstract: A method and system is provided for insulating piping installed in an exterior wall in a manner that protects the piping from freezing. Generally, the system includes an insulation block that has an interior side, an exterior side and a slot formed therein for receiving a pipe to be insulated adjacent the interior side, wherein the block is dimensioned particularly for installation into a building wall cavity. When installed, the block insures that the piping is positioned immediately adjacent the back surface of the interior sheathing material. The insulation block reliably provides a thickness of insulation material behind the piping such that the insulation material is positioned between the piping and the exterior wall surface while also maintaining the piping in contact with the rear surface of the interior wall sheathing to facilitate heat transfer from the interior of the building and into the piping.

Abstract: A rigid ductwork component for a residential, commercial, or industrial air handling system that is comprised of a rigid, tubular, fire retardant layer including a foamed or non-foamed polymer resin and a fire retardant compound. In some embodiments, the ductwork component satisfies the requirements of UL E-84 rating, and the fire retardant compound includes nanoparticles.

Abstract: A line pipe for the transport of deep-frozen media, consisting of at least two corrugated metal pipes (2, 4) arranged concentrically and at a distance from one another, an insulation layer (3) being arranged in the annular gap between the two metal pipes (2, 4), the annular gap being evacuated, and a closing valve (10) provided in the outer metal pipe (4) being connectable to a vacuum pump, the closing valve being welded, vacuum-tight, into a smooth-walled metal pipe (9) welded, vacuum-tight, to the exterior of the metal pipes (4). The valve body (10) of the closing valve projects into the interior of the smooth-walled metal pipe (9) and is flush with the outer surface area of the smooth-walled metal pipe (9).

Abstract: An insulating apparatus for use with vacuum insulated tubing sting to reduce heat loss through the joints, where the apparatus includes an insulator adapted to surround the joint and a latching joint protector adapted to surround the insulator and hold the insulator against the joint, where the protector also includes a channel for receiving injection and/or control tubing. The insulator is capable of reducing heat loss through the joints of a vacuum insulated tubing string by as much as 95%.