Abstract: A flexible hose for use as a refrigerant passageway in a vehicular refrigerating cycle has an inner hose and an outer hose. The outer hose covers the inner hose with a space formed in a given distance. The outer hose and the inner hose are formed of resin having flexibility.

Abstract: A tubular insulating apparatus (10) for insulating a first tubular (8) within a second tubular (20) for use in the oil and gas exploration and production industry. An inner insulating member (4) surrounds the outer circumference of a pipeline (8) and a rigid spacer member (16) supports the pipeline (8) within the second tubular (20), the rigid spacer member (16) being provided at the ends of the apparatus (10). A substantially resilient member (2) is also provided on the outer most face of the inner insulating member (4) and a helically arranged cut (6) is provided therethrough in order to allow tensile and compressive forces caused by a bending moment acting along the longitudinal axis (14) of the apparatus (10) when e.g. the pipeline (8) is placed upon a reel, to be substantially relieved. Methods of manufacturing and installing the apparatus (10) are also provided.

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.

Abstract: A plastics material tube that is particularly resistant to fire, such that its wall is formed by a corrugated tube of flammable plastics material, by a smooth tube lining the outside of the corrugated tube and made of a plastics material that limits flame propagation, and by a fireproofing composition received between the two tubes.

Abstract: A thermally insulated pipeline assembly comprises an inner pipe surrounded by and spaced from a jacket, which is in turn surrounded by and spaced from an outer casing. The annular space between the inner pipe and the jacket is substantially filled with thermal insulating material such as open cell polyurethane foam, which is preferably injected into the jacket and cured in situ. The space between the jacket and the outer casing may be filled with pressurized gas. The jacket may have apertures to allow the gas access to the annular insulated space. The arrangement provides improved thermal insulation, particularly when the casing is pressurized, by reducing thermal transfer by convection between the inner pipe and the outer casing. The arrangement is also applicable to pipeline bundles, with a plurality of inner pipes each having an associated jacket and insulation, all surrounded by a common casing.

Abstract: A flexible pipe for transporting a fluid comprising an outer sealing polymer sheath, at least a pair of armor wraps helically and long-pitch wound, and a polymer pressure sheath. The pressure sheath consists of an inner tube arranged in an outer tube, and grooves are arranged on at least one of the surfaces opposite the inner and outer tubes.

Abstract: An exhaust pipe includes first and second length portions, each having an outer pipe and an inner pipe positioned relative to one another to define an annular gap therebetween. The length portions are placed in confronting disposition with their adjacent first ends interconnected for relative movement in a longitudinal direction. An end piece of the outer pipe of the first length portion is disposed in surrounding relationship to an end piece of the outer pipe of the second length portion at interposition of an end portion of the inner pipe of the first length portion, wherein the end pieces of the outer pipes of the first and second length portions and the end portion of the inner pipe of the first length portion are positioned for relative movement in the longitudinal direction, so as to define a triple sliding fit.

Abstract: Modified contoured crushable structural members and methods for making the same are described. The contoured structural members comprise composite or metal materials sandwiching a support or stabilizing structure. The structural members are made crushable by incorporating an initiator into the structural members. The structural member crushes at the location of the initiator by absorbing the energy of an exerting load. The modified structure is provided by attaching additional structural components or elements to the end or outside of the structural member or by modifying the shape of the structural member. With a modified, contoured, crushable, and generally non-flat structure, applications and uses for the structural members of the present invention are nearly limitless.

Abstract: A conduit for the transport of cryogenic media, in particular a superconducting cable, includes at least two metal pipes arranged concentrically and spaced apart from one another, an insulation layer being situated in the annular gap between the metal pipes and the annular gap being evacuated. The exterior of the metal pipe (4) is separated at predetermined intervals and above each opening a pump connector (10) is welded vacuum-tight to the outer metal pipe (4).

Abstract: A spacer for a long substrate in the interior of a long tube, with a superinsulation material being disposed between the substrate and the tube. The spacer includes two rings (3, 4) seated on the substrate (1) and spaced apart from each other at a longitudinal axial distance, a tube section (5) supported on the rings (3, 4) and a second ring (6) disposed on the tube section (5). The first rings (3, 4), the tube section (5) and the second ring (6) are made of a material with poor thermal conductivity and high mechanical strength.

Abstract: A fluid conduit wall enclosing a hollow interior for the flow of fluid includes an outer surface provided with a low emissivity coating having a coating emissivity of less than 0.2 and a thickness at least sufficient to provide the coating emissivity. One embodiment provides a fluid conduit with multiple spaced-apart walls. An outer surface of an inner wall of a first member and an inner surface of an outer wall of a second member define a gap therebetween. At least one of such surfaces includes the low emissivity coating. A method for providing such coating deposits the coating, for example by reactive vaporization, concurrently on both surfaces from within the gap after assembly of the members.

Abstract: A small-diameter part in the vicinity of a center of a bellows portion in an axial direction has a smaller diameter. A tip end of the small-diameter part contacts at a point A with an outer peripheral face of an interlock pipe. The interlock pipe vibrates with using the point A and points B in both ends as fulcrums. The addition of the point A reduces distance between the fulcrums. In accordance with this reduction, deflection amount of the interlock pipe is reduced and vibration amplitude of the interlock pipe is decreased. Therefore, the interlock pipe does not contact with the bellows portion so that troubles such as noises can be prevented from occurring.

Abstract: A flexible conduit for conveying cryogenic fluids has a metal inner tube and a metal outer tube. A strip-shaped spacer member is made of a material of low thermal conductivity, which is spirally wound on the inner tube such that it contacts both the inner and outer tubes. The strip-shaped spacer member is twisted about its own axis and includes a metal that is stable with respect to high-energy radiation and has a thermal conductivity of less than 25 W/m.K and a tensile strength of more than 240 MPa.

Abstract: A fluid conduit wall enclosing a hollow interior for the flow of fluid includes an outer surface provided with a low emissivity coating having a coating emissivity of less than 0.2 and a thickness at least sufficient to provide the coating emissivity. One embodiment provides a fluid conduit with multiple spaced-apart walls. An outer surface of an inner wall of a first member and an inner surface of an outer wall of a second member define a gap therebetween. At least one of such surfaces includes the low emissivity coating. A method for providing such coating deposits the coating, for example by reactive vaporization, concurrently on both surfaces from within the gap after assembly of the members.

Abstract: An insulated pipeline comprises an inner pipe, and an outer poly sleeve co-axial with the inner pipe. The inner pipe and the outer poly sleeve are in spaced relationship to define an annulus. An insulating core within the annulus encases lengthwise the inner pipe, and comprises a plurality of pre-cured syntactic elements. A first binder fills interstices in the annulus. The pre-cured syntactic elements include microspheres and a second binder. Each of the pre-cured syntactic elements may also include macrospheres. The pre-cured syntactic elements preferably extruded and cylindrically shaped. In addition, in one embodiment, the second binder is preferably more rigid than the first binder.

Abstract: Shaped, contoured crushable structural members and methods for making the same are described. The contoured structural members comprise composite or metal materials sandwiching a support or stabilizing structure. The structural members are made crushable by incorporating an initiator into the structural members. The structural member crushes at the location of the initiator by absorbing the energy of an exerting load. The shaped structure is provided by bending the generally straight shape of the structural member. With a shaped, contoured, crushable, and generally non-flat structure, applications and uses for the structural members of the present invention are nearly limitless.

Abstract: A leak-free flexible conduit and method of making the same is described. By attaching a flexible outer hose to a flexible inner hose without directly clamping the outer hose to the inner hose, the life of the inner hose is increased. Furthermore, the outer flexible hose creates a heat-resistant, airtight seal that prevents exhaust leaks from the inner flexible hose from escaping, substantially reduces the heat lost to the atmosphere, decreases the amount of vibration, reduces noise, and protects the inner flexible hose from corrosive elements and contaminants, thereby also extending the life of the inner flexible hose.

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: A spacer for a long substrate in the interior of a long tube, with a superinsulation material being disposed between the substrate and the tube. The spacer includes two rings (3, 4) seated on the substrate (1) and spaced apart from each other at a longitudinal axial distance, a tube section (5) supported on the rings (3, 4) and a second ring (6) disposed on the tube section (5). The first rings (3, 4), the tube section (5) and the second ring (6) are made of a material with poor thermal conductivity and high mechanical strength.

Abstract: A diaphragm system to center and hold at least one inner body within an outer body, which inner body and outer body extend in a first direction, has a plurality of washers positioned between an inner surface of the outer body and has a recess or aperture for receiving each of the inner bodies. The washers have an outer circumference provided with a surface contact portion for engaging an inner surface of the outer body, and each of the recesses has a surface contact portion for engaging an outer surface of the inner body with the contact portion for engaging the outer body and the contact portion for engaging each of the inner bodies having an angular extent up to 180°. The washers are mounted at different angular orientations perpendicular to the first direction regarding their contact portions, so that pressure is applied uniformly around each of the inner bodies.

Abstract: A canal or pipe system and process for rehabilitation of a canal or pipe system and for installation of a cable or empty tube into a canal or pipe system as well as device for installation of a cable or empty tube. For rehabilitation of a canal or pipe system (AR) an outer casing (AL1) is inserted. Subsequently, an inner casing (IL1) with help by distancing elements (AH) is inserted, so that a ring gap (RS) between the inner and outer casings (IL1, AL1) is created. A cable (OC1) or empty tube (LR) to be installed is inserted together with the inner casing (IL1) in such a way, that the cable (OC1) or empty tube (LR) comes to rest in the ring gap (RS). For rehabilitation of the canal or pipe system, where a cable (OC1) or empty tube (LR) is already installed at an inner wall (IW), only the inner casing (IL1) will be inserted into the canal or pipe system (AR), so that the ring gap (RS) is created between the inner wall (IW) and the casing (IL1).

Abstract: The disclosure relates to a plastic jacket having air spaces formed by a core and a cover used to insulate hot and cold piping systems and the fittings for those systems. The jacket is made by providing a core that has portions that extends away from the element and a cover surrounding the core. The insulation value of the jacket is created by the air spaces created by the jacket. The plastic of the cover alone or the cover and core can be transparent or translucent so that the condition of the piping element and the jacketed space can be checked without removing the jacket.

Abstract: A leak-free flexible conduit and method of making the same is described. By attaching a flexible outer hose to a flexible inner hose without directly clamping the outer hose to the inner hose, the life of the inner hose is increased. Furthermore, the outer flexible hose creates a heat-resistant, airtight seal that prevents exhaust leaks from the inner flexible hose from escaping, substantially reduces the heat lost to the atmosphere, decreases the amount of vibration, reduces noise, and protects the inner flexible hose from corrosive elements and contaminants, thereby also extending the life of the inner flexible hose.

Abstract: A flexible hose for use as a refrigerant passageway in a vehicular refrigerating cycle has an inner hose and an outer hose. The outer hose covers the inner hose with a space formed in a given distance. The outer hose and the inner hose are formed of resin having flexibility.

Abstract: An adapter blank is provided which is adjustable in size to join generally tubular structures of different diameters, such as pipe insulation cladding, together. The adapter blank includes a tapering wall having a rim defining a larger diameter matching larger diameter pipe insulation cladding to be joined by the adapter. An overlapping edge extends away from the rim. Graduations are located at various different constant distances away from the rim. Indicia, such as numbers, are preferably provided adjacent at least some of the graduations to indicate the various different smaller diameter pipe insulation cladding sizes. The adapter blank is cut along the graduation corresponding with the smaller diameter pipe insulation cladding to be joined with the adapter. The adapter blank is thus modified into a finished adapter ready for installation joining together pipe insulation cladding, or other tubular structures of different diameters; or terminating an end of pipe, tank, vessel or other tubular structure.

Abstract: The invention concerns a double-sheath rigid pipe for transporting hydrocarbons consisting of two respectively inner (2) and outer (3) coaxial tubes separated by an annular gap (5), said pipe being adapted to be wound and comprising a device limiting the propagation of a deformation occurring on the outer tube, wherein a radial stop device (10) linked to the inner tube (2) but not linked to the outer tube (3) allows a localised collapse of value G of the outer tube, G being selected to stop the propagation of a deformation of the outer tube (3).

Abstract: A pipeline for the transport of refrigerated media, including at least two metal pipes, positioned concentrically and at a distance to one another, an insulating layer made of layers of insulating material and reflecting material alternately positioned over one another being provided in the ring gap between the metal pipes and the ring gap being evacuated and a spacer in the form of a helix being wound onto the inner pipe. The spacer (3) is a metal wire (3a), onto which bodies (3b) made of a mechanically resistive insulating material, which are provided with a hole, are threaded at specific intervals.

Abstract: The disclosure relates to a plastic jacket having air spaces formed by a core and a cover used to insulate hot and cold piping systems and the fittings for those systems. The jacket is made by providing a core that has portions that extends away from the element and a cover surrounding the core. The insulation value of the jacket is created by the air spaces created by the jacket. The plastic of the cover alone or the cover and core can be transparent or translucent so that the condition of the piping element and the jacketed space can be checked without removing the jacket.

Abstract: The present invention relates to apparatus for use in venting pipelines that have a plastic lining such as these used for transporting hydrocarbon fluids. A pipeline assembly comprises a pipeline (2), a corrosion resistance liner (3), and a micro-annulus (4) located between said pipeline and liner. The pipeline assembly also comprises a venting means (5) adapted for fitment in or through the corrosion resistance liner (3), wherein the venting means (5) allows gas to flow from the micro-annulus into the centre of the pipeline assembly but not in the opposing direction.

Abstract: This invention is related to ultra-light conduit for used air and a method for construction of such a conduit with sandwich sheet type of material such as “THERMO-FOIL™” permitting to avoid losses of heat and humid air. The method of construction of a used air rectangular conduit includes the following five (5) steps: 1) cutting of a sandwich sheet 2) sealing around the sandwich sheet 3) heat formation of lengthwise channels on the surface of sandwich sheet 4) assembling the sandwich sheet into a conduit of a predetermined length and 5) installing a lengthwise vertical reinforcement into the conduit and providing a male adaptor to a fore end of the conduit which could be adapted to an aft end of a joining conduit.

Abstract: A device for arresting the propagation of a buckle appearing on an outer tube of a double-walled rigid pipe intended to transport hydrocarbons and consisting of two coaxial tubes. The double-walled pipe is of the reelable type and intended for very great depths and consists of a thick and rigid annular transverse partition fastened to the inner tube and to the outer tube. The partition is joined to the outer tube and to the inner tube by way of an outer and inner sleeve having the same diameter as the outer and inner tubes and fastened to the latter.

Abstract: An armoured flexible pipe consists of an inner liner (3), on the inside of which a carcass (1) is provided, while the outer side of the inner liner is surrounded by a layer of pressure armour and a layer of tensile armour, which in turn are surrounded by one or more layers of thermally insulating bands which are shielded from the surroundings by an outer sheath. With the object of ensuring a sufficiently low transport of heat through the walls of the pipe, on the outside of the pressure and tensile armour layers (5, 6, 7, 8) thermally insulating bands are provided, which bands are made of a polymer or a polymeric composition, such as a polymer containing at least 50% polypropylene. The armoured flexible pipe according to the invention is especially advantageous for use in the extraction, transport or refining of mineral oil or related fluids.

Abstract: The invention relates to an arrangement (2; 2.2; 2.6; 2.7) to increase the thermal fatigue resistance of glass tubes (1; 1.2; 1.6; 1.7) flown through by fluid and pressure-loaded. This arrangement comprises a glass tube (1; 1.2; 1.6; 1.7), into which an interior component (3; 3.2; 3.6; 3.7) is inserted. The interior component (3; 3.2; 3.6; 3.7) can be designed as thin-walled tube (19; 19.2) or tubular component. In accordance with a first design example the cavity enclosed by the interior component (3; 3.2) is hydraulically connected with the interior (10) of the glass tube (1; 1.2). The wall thickness (s3) of the interior component (3; 3.2) is smaller than the wall thickness of the glass tube (1; 1.2) and the interior component (3; 3.2) is in the condition of being flown through by fluid at least partially free from a direct heat connection with the glass tube (1; 1.2). In accordance with a second design example the interior component (3.6; 3.7) increases the wall thickness of the glass tube (1.6; 1.7).

Abstract: A conduit for the transport of cryogenic media, in particular a superconducting cable, includes at least two metal pipes arranged concentrically and spaced apart from one another, an insulation layer being situated in the annular gap between the metal pipes and the annular gap being evacuated. The exterior of the metal pipe (4) is separated at predetermined intervals and above each opening a pump connector (10) is welded vacuum-tight to the outer metal pipe (4).

Abstract: A device for eliminating propagation of a buckle in the outer wall of a double-walled tube, where the double-walled tube comprises an outer pipe, an inner pipe and an annular space between them in which the deformable element is disposed with the external surface of the deformable element in contact with the internal wall of the outer pipe and the interior of the deformable element being spaced outward from the inner pipe and having a sheath on the interior of the deformable element. The deformable element may be a wound wire, a profiled wire, an interlocked wire with interlocked turns, a non-interlocked wire, a spring with turns urged outwardly or reinforcement with turns urged outwardly and bearing blocks in the annular space on the inner pipe for at least one end of the reinforcement.

Abstract: The present invention relates to a method intended for heat insulation of a pipe (1), comprising the following successive stages of depositing, on the outer surface of the pipe moving longitudinally, a thickness (3) of an insulating material made of elastomer having an elastic type behavior, substantially without irreversible plastic deformation, forming at least one circumferential slot (4) in the thickness of the material substantially orthogonally to the axis (2) of the pipe, and coating the insulating material thickness with a sealed sheath. In a variant, the slot is machined in the thickness of the insulant. The invention further relates to a heat-insulated pipe.

Abstract: The invention concerns a flexible pipe element, in particular for exhaust pipes of combustion engines of motor vehicles, with a helically threaded or ring-corrugated bellows, at least one strip wound hose which is coaxially adjacent to the bellows and which is helically wound or comprises several annular segments, at least one spacer which is disposed locally between the bellows and the strip wound hose and a knitted tube disposed on the outside, wherein the pipe element has an overall maximum rigidity of 5 N/mm.

Abstract: A small-diameter part in the vicinity of a center of a bellows portion in an axial direction has a smaller diameter. A tip end of the small-diameter part contacts at a point A with an outer peripheral face of an interlock pipe. The interlock pipe vibrates with using the point A and points B in both ends as fulcrums. The addition of the point A reduces distance between the fulcrums. In accordance with this reduction, deflection amount of the interlock pipe is reduced and vibration amplitude of the interlock pipe is decreased. Therefore, the interlock pipe does not contact with the bellows portion so that troubles such as noises can be prevented from occurring.

Abstract: Improved thermoplastic liner containing metal pipelines in which the liners consist essentially of polyamide 11 or polyamide 12 as well as methods for their preparation and use are disclosed.

Abstract: A means for thermal maintenance of industrial pipe by virtue of a working medium passing through at least one prefabricated hollow element attachable to the outside surface of the pipe wall is disclosed. The hollow element comprises an outer cover defined by an inner portion, facing the external surface of the pipe wall, an outer portion, situated opposite the inner portion and facing outwardly and transition portions connecting the inner portion with the outside portion. The inner portion is provided with concave configuration defined by radius R1 and closely matching the curvature of the pipe. The inner portion encloses about 180 degrees of the pipe's external surface and the transition portions are rounded by radius r, wherein r<R1.

Abstract: An insulated pipeline comprises an inner pipe, and an outer poly sleeve co-axial with the inner pipe. The inner pipe and the outer poly sleeve are in spaced relationship to define an annulus. An insulating core within the annulus encases lengthwise the inner pipe, and comprises a plurality of pre-cured syntactic elements. A first binder fills interstices in the annulus. The pre-cured syntactic elements include microspheres and a second binder. Each of the pre-cured syntactic elements may also include macrospheres. The pre-cured syntactic elements are preferably extruded and cylindrically shaped. In addition, in one embodiment, the second binder is preferably more rigid than the first binder.

Abstract: Contoured metal-containing structural members and methods for making the same. The contoured structural members comprise metal-containing materials sandwiching a support or stabilizing structure. The contoured structure can be provided by tube rolling (or roll wrapping) the metal-containing materials and the support structure together and then, if necessary, bonding them or connecting them. With a contoured and generally non-flat structure, applications for the structural members of the present invention are nearly limitless.

Abstract: A casing spacer disposed between and engaging an inner carrier pipe and an outer casing maintains separation between and alignment of the carrier pipe and the casing. The casing spacer includes plural connected shell members, or segments, disposed about and engaging an outer surface of a carrier pipe and an inner surface of the casing. Each shell member includes one or more non-slip members engaging the carrier pipe to prevent movement of the casing spacer along the carrier pipe/casing combination. Each shell member is comprised of a high-strength, pliable material permitting shell members of different sizes to be connected together in a single casing spacer to accommodate a wide range of carrier pipe circumferences. The shell members are connected by plural nut and bolt couplers, with each shell member further including tapered coupling apertures and plural connector flanges to facilitate assembly and installation.

Abstract: A pipeline for moving effluents at seabed level, including an inner shell and at least one outer shell having an outer surface separated from the inner shell by an annular space for receiving an insulating layer, wherein the outer shell includes a set of mutually spaced flutings arrayed along at least a portion of the outer surface and each fluting has a bottom resting on a spacer element located around the inner shell.

Abstract: A leak-free flexible conduit and method of making the same is described. By attaching a flexible outer hose to a flexible inner hose without directly clamping the outer hose to the inner hose, the life of the inner hose is increased. Furthermore, the outer flexible hose creates a heat-resistant, airtight seal that prevents exhaust leaks from the inner flexible hose from escaping, substantially reduces the heat lost to the atmosphere, decreases the amount of vibration, reduces noise, and protects the inner flexible hose from corrosive elements and contaminants, thereby also extending the life of the inner flexible hose.

Abstract: A fluid transport system including a fluid transfer assembly, an air dryer and a tube. The fluid transfer assembly includes a pipe for transporting a cold fluid and a vapor barrier surrounding the pipe. The air dryer removes moisture in the air. The tube is connected to the air dryer and the fluid transfer assembly. The tube transfers air from the air dryer to the fluid transfer assembly at a plurality of points along a length of the fluid transfer assembly.

Abstract: An insulated pipework system comprises an outer sleeve, an inner flow pipe and one or more evacuated volumes in the space therebetween defined by annular plugs of a setting polymeric composition such as epoxy resin or a syntactic foam, typically at regular intervals along the length of the pipeline. The epoxy resins (for example) are ideally of sufficient rigidity to allow effective transfer of longitudinal forces between the inner and outer pipes. Thus, the evacuated volumes will themselves be annular. Other plugs of different orientation (for example longitudinal) could be included to subdivide the evacuated volumes further. The plugs allow the space between the pipes to be partitioned so that air can be evacuated from the sections so formed to provide the vacuum that acts as the insulating layer. Also, the plugs replace the need for bulkheads in that the partitioning of the inter-pipe space provides the desired water-stopping means.

Abstract: There is provided a double-walled structure for coupling to another double-walled structure. The coupling connects one female end portion of the one structure and one male end portion of the other structure together. The connecting requires only connecting of the outer walls of the structures together, providing an overlapping connection. The inner walls of the structures have a gap between their ends, when connected. Thereby the coupling of the structures is facilitated. The space between the inner wall and outer wall of the structure is occupied by an insulating material, such as a sound absorbing fibrous batting. The space between the male/female end portions for connection to a female/male end of another structure is filled by a seal, preventing loss of insulating material and providing insulation of the joint coupling the double-walled structures together. The structure can be used, especially, as a segment in a sound-absorbing ductworks system.

Abstract: The disclosure relates to a plastic jacket having air spaces formed by spaced walls used to insulate hot and cold piping systems and the fittings for those systems. The jacket is made from multiple segments, which are joined together along their longitudinal joints. The segments are joined to each other by tongue and groove connections. One segment can be cut longitudinally and glued to another segment to make a larger segment to fit various diameters of pipe. In a further embodiment, the plastic jacket is modified to form the duct of a heating, ventilating and air conditioning system. The inner wall of the jacket forms the air duct. In both embodiments, at least some of the segments have hinge portions created by omitting the inner wall at the hinge portions.

Abstract: A device for arresting the propagation of a buckle appearing on an outer tube of a double-walled rigid pipe intended to transport hydrocarbons and consisting of two coaxial tubes. The double-walled pipe is of the reelable type and intended for very great depths and consists of a thick and rigid annular transverse partition fastened to the inner tube and to the outer tube. The partition is joined to the outer tube and to the inner tube by way of an outer and inner sleeve having the same diameter as the outer and inner tubes and fastened to the latter.