Abstract: Disclosed herein are various technologies pertinent to rocket engines, including injector, thrust chamber, and electrical turbopump devices that may be combined to provide a more efficient rocket engine. The thrust chamber may be coupled with an injector having a circular array of support columns supporting a distribution system. Liquid may be flowed from the distribution system, through the support columns, and into a combustion chamber of the thrust chamber.

Abstract: A downhole system includes a first tubular having a terminal end including a first connector portion, an inlet, an inner surface, an outer surface, and a first conduit extending between the inner surface and the outer surface fluidically exposed at the terminal end. A second tubular including a terminal end section having a second connector portion coupled to the first connector portion to form a joint, an inner surface section, an outer surface section, and a second conduit extending between the inner surface section and the outer surface section and fluidically exposed at the terminal end section. The first conduit is fluidically connected to the second conduit across the joint.

Abstract: A pipe end fitting assembly that includes an outer body having an outer surface, an inner surface defining a first bore, and an end surface, and an inner body having an inner surface defining a second bore and an outer surface. A portion of the inner body outer surface is secured to the outer body inner surface. A passage formed in the outer body includes a first portion extending from the end surface and parallel to the first bore, and a second portion extending from the outer body outer surface to the passage first portion. A pipe end is disposed around and secured to a portion of the inner body outer surface. A jacket is disposed around the pipe and has an end secured to the outer body outer surface. The passage portions are in fluid communication with each other and a space between the jacket and the pipe.

Abstract: A double skinned feed or scavenge pipe assembly comprises; an inner pipe (22) and an outer pipe (23) enclosing the inner pipe and defining an annular space (24) between the inner pipe and the outer pipe and a sleeve (28) configured to slip over the outer pipe (23). Complementary threads (29) are provided on an outer wall of the outer pipe (23) and an inner wall of the sleeve (28). A lock, for example in the form of a locking nut (31) is positioned over the outer pipe (23) when the complementary threads (29) of the outer pipe and sleeve are engaged. The configuration of the assembly is such that, in use, the sleeve (28) is slidable between a first position where the inner pipe (22) is accessible and a second position wherein the inner pipe (22) is completely enclosed.

Abstract: A flange fitting for attaching to double wall tubes includes a fitting center port, a plurality of fitting mounts, inner and outer seal surfaces, fluid communication ports, and a connections surface. The fitting center port extends through the fitting for passing a primary fluid flow. The fitting mounts are spaced radially away from the center port for receiving fasteners. The inner and outer seal surfaces are predominantly flat. The fluid communication ports for pass a secondary fluid flow and fluid communication ports extend through the fitting from between the inner and outer seal surfaces to the connection surface between the inner sleeve connection and the outer connection. The connection surface is on a side of the fitting opposing the seal surfaces. The connection surface includes an inner sleeve connection and an outer connection.

Abstract: A drainage assembly (68) includes a first segment (70A) with a first inner tube (76A) defining a first inner tube passage (78A), a first outer tube (72A) concentrically disposed around the first inner tube (76A) and defining a first outer tube passage (74A), and a first fitting (80A) disposed on an end of the first segment (70A). The first fitting (80A) has a first inner passage (82A) in fluid communication with the first inner tube passage (78A) and a first outer passage (84A) in fluid communication with the first outer tube passage (74A). A plate (88) is positioned adjacent the first fitting (80A). The plate (88) has a second inner passage (90) in fluid communication with the first inner passage (82A) on one side, and a second outer passage (92) in fluid communication with the first outer passage (84A) on the one side. Also included is a drainage line (104) in fluid communication with the first outer tube passage (74A).

Abstract: A connector for simultaneously connecting and disconnecting electrical and fluid paths includes an internal valve which activates fluid flow when the two sides of the connector are connected together to provide an electrical connection and deactivates the fluid flow when the connectors are disconnected. The connector bodies can be constructed of metal or other conductive materials providing an electrical connection, and can include holes or apertures to provide fluid paths through the connector bodies. Valves can be included in both mating connectors to prevent or allow fluid flow from both sides of the flow path.

Abstract: A joint for a double wall tube assembly includes an adapter having an inner wall and an outer wall connected by a web, and a flange extending from the outer wall. The inner wall is configured to receive an inner tube of a double wall tube assembly. The outer wall is configured to be connected to an outer tube of the double wall tube assembly.

Abstract: A radio frequency (RF) antenna assembly to be positioned within a wellbore in a subterranean formation for hydrocarbon resource recovery may include a series of tubular conductors coupled together in end-to-end relation. Each tubular conductor may include a dual-wall conductor defining an RF antenna. The dual-wall conductor may include an outer wall and an inner wall spaced inwardly therefrom to define an outer fluid passageway. The RF antenna assembly may further include an RF transmission line extending within at least some of the tubular conductors.

Abstract: A pipe-in-pipe pipeline has a bulkhead that transfers thermal stress from an inner pipe to an outer pipe, wherein at least part of the bulkhead forms a conduit for a product traveling through the inner pipe.

Abstract: A connection device of a double-walled heat exchanger tube is provided, in particular for the heat exchanger of a motor vehicle air conditioning system. The heat exchanger tube has an outer tube and an inner tube that runs coaxially inside the outer tube spaced radially apart from it. The connection device further has a fitting for accommodating radially overlapping end sections of the inner and outer tube. The outer and inner tubes according to the invention are at least sectionally joined together without soldering in the area of the fitting, and with the fitting.

Abstract: A hose-in-hose system defined by a first inner hose assembly, a second inner hose assembly, a first outer hose assembly and a second outer hose assembly. The first inner hose assembly is carried within the first outer hose assembly. The second inner hose assembly is carried within the second outer hose assembly. A first spacer member is nested between the first inner hose assembly and the first outer hose assembly. A second spacer member is nested between the second inner hose assembly and the second outer hose assembly. Said first outer hose assembly is mateable to said second outer hose assembly such that said first inner hose assembly is held in mated contact with said second inner hose assembly.

Abstract: A coaxial pipe element (1) includes an outer pipe (1a) and an inner pipe (1b), and at each of its ends a junction forging (2a, 2b), each forging having at least an inner first branch (32) set back (L1) from an outer first branch (31), in which all of the circular welds between the inner and the outer pipe and the junction forgings are made on the outside of the pipes.

Abstract: A leak detection feature for a fluid conduit. The leak detection feature facilitates the monitoring of fluid leaks at the interface of two adjoining conduit flange fittings. An embodiment of a flange fitting with a leak detection feature for a fluid conduit having an opening. The flange fitting includes a flange body around the opening of the fluid conduit, a leak detection passageway formed in the flange body, and a leak detection port formed in the flange body. The flange body has a sealing face surface configured to mate with a cooperating flange fitting, and the leak detection passageway terminates at the sealing face surface. The leak detection port is in fluid communication with the leak detection passageway, and the leak detection port is configured for fluid communication with a leak sensing apparatus.

Abstract: An apparatus that enables quick disconnect termination or connection for cryogenic transfer lines is presented. The apparatus is a connector that will allow two lines to be connected and coupled for simultaneously allowing for fluid to occur and electrical communication to ensue. Connection and termination will occur successfully under a pressurized environment.

Abstract: A coupling feature for double-walled pipes. A double-walled vent pipe section has an outer wall with corresponding male and female coupling features formed on opposite ends thereof. The inner wall of the double-walled pipe section has a small ridge formed around the circumference of one end. When pipe sections are coupled together, the male and female coupling features on the outer walls engage, and the ridge on the inner wall of one pipe section engages with the bare inner wall of the other pipe section.

Abstract: A stuffing box flow diverter including a body including first, second, and third connector portions. The third connector portion is configured for connection to a stuffing box. A first passage extends from the first connector portion to the third connector portion and a second passage extends from the first connector portion to the third connector portion. The first and second passages are coaxial, wherein the second passage includes an annular portion extending along at least a portion of the first passage. The first passage is defined by a tube extending from the first connector portion and through a bore formed in the third connector portion, the bore having a bore diameter larger than an outer diameter of the tube. The second passage includes the annular region defined by the bore diameter and the outer tube diameter.

Abstract: A double hose having a hose contained within a hose. First and second hose assemblies to be joined together so each have an outer hose and an inner hose. Ends coupler parts of the inner hoses are maintained in a concentric relationship within coupler parts on the ends of the outer hoses. The coupler parts are joinable to each other. One of the ends of the inner hoses extends beyond its corresponding coupler part to form a male and is received in the end of the other inner hose within the other coupler part. As such, when the flanges on the outer coupler parts of the outer hoses are joined together the inner hoses are joined to form a fluid tight seal.

Abstract: A double containment pipe system with an expandable joint. The double containment pipe system may comprise an inner, or carrier, pipe assembly and an outer, or containment, pipe assembly. The expandable joint allows the inner, or carrier, pipe assembly and an outer, or containment, pipe assembly to expand axially independently. Such an expandable joint for a double containment pipe system may be beneficial where the carrier and containment pipe assemblies expand or contract at different rates due to different materials and/or different temperature environments.

Abstract: A double pipe connection structure includes a joint member and a double pipe having an inner pipe and an outer pipe coaxially disposed therein. Further, the double pipe connection structure includes a supporting rib formed integrally therewith in an axial direction, wherein the supporting rib connects the inner pipe to the outer pipe. Further, the joint member includes a first hole into which the outer pipe is inserted and a second hole into which the inner pipe is inserted, wherein the second hole has a diameter that is smaller than a diameter of the first hole, and wherein the first and second holes are bored to be aligned in an axial direction. Moreover, in the joint member, a first-pressure connecting hole communicates with the first hold and a second-pressure connecting hole communicates with the second hole, such that a pressure in the first-pressure connecting hole is lower than a pressure in the second-pressure connecting hole.

Abstract: A description is given of a burner for introducing solid, liquid or gaseous fuel into the burning zone of a kiln, such as rotary kiln for manufacturing cement clinker or “similar materials, said burner comprising a burner pipe (1) which encircles a number of ducts for conveying fuel and combustion air through the burner. The burner is characterized in that the burner pipe (1) is made up of modules (1a, 1b) which are fixed to another by fixing means (9) which will allow non-destructive assembly and disassembly of the modules. Hereby is obtained a burner in which it will be possible in a simple and non-destructive manner to disassembly the burner pipe (1) in modules (1a, 1b) in direction from the free end of the burner (7) or the burner tip.

Abstract: A coupling for fuel pipe includes a pipe end fitting, which includes a male outer surface including a groove and a female inner surface including a groove. The coupling includes a double-walled socket including a female outer socket and a male inner shaft. The pipe end fitting is accommodated in the region between the female outer socket and the male inner shaft. A first seal ring seals between the female inner surface and the male inner shaft. A second seal ring, which may be substantially coplanar with the first, seals between the male outer surface and the female outer socket of the double-walled socket. The coupling may be so arranged that the pipe end fitting and the double-walled socket are able to pivot relative to each other by up to at least ±2 degrees and are able to slide both towards and apart from each other.

Abstract: A method for manufacturing a double walled pipeline comprises providing a pipeline section including an inner tubular member and an outer tubular member, providing a coupling member, and controlling the stress distribution in the inner tubular member and the outer tubular member by coupling the inner tubular member and the outer tubular member directly to the coupling member.

Abstract: In a double-pipe joint for connecting and coupling a double pipe (H) consisting of outer and inner pipes (h2, h1) made of a fluororesin tube, an inner joint portion (T1) for coupling the inner pipe is formed by: a sleeve (2) which is to be pressingly fitted into an inner-pipe end portion (h1t); an inner-pipe joint body (1) which is to be fitted onto the inner-pipe end portion; and an inner-pipe union nut (3A), and an outer joint portion (T2) for coupling the outer pipe is formed by: a sleeve (4) which is to be pressingly fitted into an outer-pipe end portion (h2t); an outer-pipe joint body (3B) which is to be fitted onto the outer-pipe end portion; and an outer-pipe union nut (5). The inner-pipe union nut (3A) and the outer-pipe joint body (3B) are formed integrally into a nut-equipped body (3).

Abstract: A thermal insulation device of a screwed junction between two sections of pipe comprising an outer pipe surrounding an inner pipe between which thermal insulation material is positioned, the inner pipes being assembled together by the screwed junction, one section delimiting a male portion and the other delimiting a female portion, the portions being fitted together to delimit the screwed junction, wherein the male portion comprises the inner pipe and a tubular part connected thereto, the diameter of the tubular part being less than that of the outer pipe, and wherein the female portion comprises a part of the outer pipe and an intermediate tubular part connecting the inner pipe to the outer pipe, the inner diameter of the intermediate part being greater than the outer diameter of the tubular part of the male portion, the thermally insulating material being inserted between the outer pipe and the intermediate part.

Abstract: An apparatus for connecting multi-lumen conduits may include a conduit adapter and a conduit collar. The conduit adapter may include a housing, a bayonet connector, and a support member connecting the housing and the bayonet connector. The support member has an aperture that permits fluid communication through the support member. One end of the conduit collar is sized for insertion into the housing, and a second end is adapted to receive a first multi-lumen conduit. The housing also is adapted to receive a second multi-lumen conduit. The bayonet connector engages a primary lumen of the first multi-lumen conduit and the second multi-lumen conduit such that the primary lumen of the second multi-lumen conduit fluidly communicates with the primary lumen of the first multi-lumen conduit. The conduit adapter and the conduit collar are capable of 360 degree rotation relative to each other about a common axis.

Abstract: A safety coupling for the releasable connection of a nozzle to a duct system is disclosed. The safety coupling is adjustable between a coupled position, in which the coupling parts are coupled together to lock the connection of the nozzle to the duct system, and a decoupled position, in which the coupling parts are separable to allow release of the nozzle from the duct system. An actuating member is arranged to move the coupling member from the coupled position into the decoupled position when the coupling member is subjected to a disengagement force exceeding a predetermined limit value.

Abstract: In a double-pipe joint for connecting and coupling a double pipe H consisting of outer and inner pipes h2, h1 made of a fluororesin tube, an inner joint portion T1 for coupling the inner pipe is formed by: a sleeve 2 which is to be pressingly fitted into an inner-pipe end portion h1t; an inner-pipe joint body 1 which is to be fitted onto the end portion; and an inner-pipe union nut 3A, and an outer joint portion T2 for coupling the outer pipe is formed by: a sleeve 4 which is to be pressingly fitted into an outer-pipe end portion h2t; an outer-pipe joint body 3B which is to be fitted onto the end portion; and an outer-pipe union nut 5. The inner-pipe union nut 3A and the outer-pipe joint body 3B are formed integrally into a nut-equipped body 3.

Abstract: In a double-pipe joint for connecting and coupling a double pipe H consisting of outer and inner pipes h2, h1 made of a fluororesin tube, an inner joint portion T1 for coupling the inner pipe is formed by: a sleeve 2 which is to be pressingly fitted into an inner-pipe end portion h1t; an inner-pipe joint body 1 which is to be fitted onto the end portion; and an inner-pipe union nut 3A, and an outer joint portion T2 for coupling the outer pipe is formed by: a sleeve 4 which is to be pressingly fitted into an outer-pipe end portion h2t; an outer-pipe joint body 3B which is to be fitted onto the end portion; and an outer-pipe union nut 5. The inner-pipe union nut 3A and the outer-pipe joint body 3B are formed integrally into a nut-equipped body 3.

Abstract: An elastomeric lip seal joint for sealing the inner liner and grout layers when joining two sections of multiwall pipe having an outer steel casing and an inner liner. The ring-shaped lip seal joint comprises a gasket with insulating material completely covering its outer surface. The insulating material is capable of shielding the gasket from the heat produced when the sections of outer steel casing are welded together. The use of the lip seal joint simplifies the process of joining sections of multiwall pipe. Each side of the lip seal joint is inserted into one of the annular voids at each end of the pipe, thereby sealing the inner liner and grout. A single circumferential weld then joins the outer steel casing. The gasket remains intact during the welding process due to the presence of the insulating material.

Abstract: A leak detection feature for a fluid conduit. The leak detection feature facilitates the monitoring of fluid leaks at the interface of two adjoining conduit flange fittings. An embodiment of a flange fitting with a leak detection feature for a fluid conduit having an opening. The flange fitting includes a flange body around the opening of the fluid conduit, a leak detection passageway formed in the flange body, and a leak detection port formed in the flange body. The flange body has a sealing face surface configured to mate with a cooperating flange fitting, and the leak detection passageway terminates at the sealing face surface. The leak detection port is in fluid communication with the leak detection passageway, and the leak detection port is configured for fluid communication with a leak sensing apparatus.

Abstract: In a double-pipe joint for connecting and coupling a double pipe (H) consisting of outer and inner pipes (h2, h1) made of a fluororesin tube, an inner joint portion (T1) for coupling the inner pipe formed by: a sleeve (2) which is to be pressingly fitted into an inner-pipe end portion (h1t); an inner-pipe joint body (1) which is to be fitted onto an inner end of the end portion; and an inner-pipe union nut (3A), and an outer joint portion (T2) for coupling the outer pipe formed by: a sleeve (4) which is to be pressingly fitted into an outer-pipe end portion (h2t); an outer-pipe joint body (3B) which is to be fitted onto an outer end of the end portion; and an outer-pipe union nut (5). The inner-pipe union nut (3A) and the outer-pipe joint body (3B) are formed integrally into a nut-equipped body (3).

Abstract: Connector between a reaction pipe and a cooling pipe and method for connecting a reaction pipe to a cooling pipe. The cooling pipe is a double pipe having an inner pipe, disposed in the extension of the reaction pipe, and an outer pipe that surrounds the inner pipe to form an intermediate cooling space between them. A supply chamber is connected to the cooling space for supplying coolant thereto. A transition piece, connected to the reaction pipe, has a fork-shaped end portion composed of an inner portion and an outer portion with heat-insulating material between them. The outer portion is secured to the base of the supply chamber coaxially relative to the longitudinal axis of the cooling pipe. The supply chamber, transition piece and half shells form a prefabricated unit. An inner tube section is welded to, and extends out of, the supply chamber and is aligned with the inner portion of the transition piece.

Abstract: An apparatus includes a connector to connect a first tubing section and a second tubing section together. The connector that includes a body that includes a first opening to receive the first tubing section, a second opening to receive the second tubing section, and a passageway. The apparatus includes a member that is adapted to be moved from a retracted position to an extended position to form a sealed connection between a tubular member that is connected to the first tubing section and the passageway.

Abstract: A venting apparatus includes a projecting member with a projection base, and a mating socket member with a socket base, and first and second ducts in fluid communication with an appliance to vent emissions along an emission flow path. The projection base engages a first one, and the socket base engages a respective other one, of the first and second ducts. The projecting and socket members have default configurations. The projecting member is movable from the default configuration towards a deflected configuration, and biased for return therefrom. The first and second ducts are movable between sliding and locked configurations. In the sliding configuration, the projecting and socket members bear against one another, with the projecting member removed from the default configuration. In the locked configuration, the projecting member is in the default configuration, and secured to the socket member, such that the second duct securely engages the first duct.

Abstract: A cylindrical junction part for joining together two elements of an assembly of at least two coaxial pipes, comprising an outer pipe containing an inner pipe defining an annular space preferably containing lagging material. The forged junction part forms two annular cavities defined by branches in a fork configuration at each end of said part serving to minimize stresses and fatigue in the join zone between two junction parts at the ends of two lengths of coaxial pipe to be joined together and between each length of pipe and each junction part at the ends thereof.

Abstract: A wall bushing for an air-conditioner comprises an external pipe and an internal pipe. The cross section of the external pipe is a “sports ground” shape, and an inner circular wall of the external pipe is tangential to an outer circular wall of the internal pipe. An end of the internal pipe is connected to an air outlet port of the air conditioner, and an end of the external pipe is connected to an air inlet port.

Abstract: A rotary transmission leadthrough is provided with a gas return line, in particular for filling a vehicle fuel tank comprising a rapid-action connection coupling, which is connected to the supply line and to a return line. The supply line and the return line are arranged in a coaxial manner in relation to each other.

Abstract: A dual walled transfer tube connecting two sub-flow systems and conveying the system fluid from one subsystem to another when there are large radial and axial movements or offsets between the connecting ends of the subsystem. The dual walled transfer tube has a fitting at either end and a single ball joint proximate each fitting to allow the transfer tube to accommodate changes in radial position of the fittings. The dual walled transfer tube utilizes a main inner fluid passage and an outer secondary fluid passage, each fluid passage having a slip joint to allow the transfer tube to accommodate changes in axial length between the fittings.

Abstract: A method and apparatus for joining the ends of concentric inner and outer tube to a double containment fitting are disclosed, as are related methods of fabrication and systems. The apparatus uses a threaded coupling to compressively engage and seal the ends of both the inner and outer tubes to the double containment fitting. The double containment fitting includes inner and outer noses and a threaded annular body and annular nut. The inner nose may be at least partially inserted within a flared end of the inner tube, and the outer nose may encircle the inner tube and be inserted within the flared end of the outer tube. The inner and outer noses and the inner and outer tubes may be engaged in a relationship within bores through the annular body and the annular nut. Threadably engaging the annular nut with the annular body may establish seals between the components.

Abstract: A coupling for connecting double-walled fuel comprises a pipe end fitting (1), which includes a male outer surface for example including a groove (12) and a female inner surface for example including a groove (11). The coupling also includes a double-walled socket (4), which includes a female outer socket (17) and a male inner shaft (18). The pipe end fitting is partially accommodated in the region between the female outer socket and the male inner shaft of the double-walled socket. A first seal ring (9) seals between the female inner surface of the pipe end fitting (1) and the male inner shaft (18) of the double-walled socket (4). A second seal ring (10) which may be substantially coplanar with the first, seals between the male outer surface of the pipe end fitting (1) and the female outer socket (17) of the double-walled socket (4).

Abstract: The present invention provides a double pipe connection structure where, in a distal end portion of an outer pipe of a double pipe, an outer pipe expanded part detached from a supporting rib and having a diameter expanded more than that of a general part of the outer pipe is formed; the outer pipe is coupled with a joint member by caulking a collar part at a periphery of an open end portion of a large diameter hole of the joint member in a state that an inner pipe end portion of the double pipe is inserted into a small diameter hole while an inner pipe side O-ring mounted on an outer periphery thereof is press-contacted with an inner periphery of the small diameter hole of the joint member; and the outer pipe expanded part is inserted into the large diameter hole while an outer pipe side O-ring mounted on an outer periphery thereof is press-contacted with an inner periphery of the large diameter hole of the joint member.

Abstract: In a double-pipe joint for connecting and coupling a double pipe consisting of outer and inner pipes made of a resin tube, an inner joint portion for coupling the inner pipe formed by: a sleeve which is to be pressingly fitted into an inner-pipe end portion; an inner-pipe joint body which is to be fitted onto the end portion; and an inner-pipe union nut, and an outer joint portion for coupling the outer pipe formed by: a sleeve which is to be pressingly fitted into an outer-pipe end portion; an outer-pipe joint body which is to be fitted onto the end portion; and an outer-pipe union nut. The inner-pipe union nut and the outer-pipe joint body are formed integrally into a nut-equipped body.

Abstract: A fitting for providing a substantially fluid-tight seal between an opening in a chamber wall and a pipe passing through the opening, the fitting including a tubular sleeve adapted to pass through the opening in the chamber wall and further adapted to allow the pipe to pass through the sleeve, a flange extending radially outwardly from the sleeve, a first surface of the flange being configured to contact the chamber wall around substantially the whole circumference of the opening wherein the flange incorporates an energy transfer device enabling the first surface and/or wall of chamber in the vicinity of the flange to be heated to cause the flange and the wall to fuse or bond together in order to form a substantially fluid tight seal.

Abstract: An exemplary embodiment provides a shrouded conduit joint assembly that includes a joint assembly and a boot shroud. The joint assembly includes a first ferrule having a first seal, and a second ferrule having a second seal. A clamp operatively engages the first ferrule and the second ferrule. The boot shroud surrounds the joint assembly and is spaced from the joint assembly to create a leak detection space between the joint assembly and the boot shroud.

Abstract: Provided are shrouded adapter assemblies for coupling together a first conduit and a second conduit. The conduits may both be single-walled or one may be shrouded. Thus, the first conduit may include an inner conduit and an outer conduit with a conduit annular space between the inner conduit and the outer conduit. The adapter assembly may include a first adapter body having a first end and a second end. The first end is configured to receive an end of the inner conduit of the first conduit, and to receive an end of the outer conduit of the first conduit. The adapter assembly also includes a second adapter body having a first end and a second end, where the first end of the second adapter body is configured to receive an end of the second conduit. The adapter assembly further includes a clamp operatively engaging and clamping the second end of the first adapter body to the second end of the second adapter body.

Abstract: A thermally-insulated pipeline for the transportation of a cryogenic liquid, comprising three coaxial pipes formed of sections, one inner pipe made of a material having a low thermal expansion coefficient, a middle pipe and an outer pipe made of steel. The pipes are linked by linking parts which join sections of each respective pipe and take up the loads produced by thermal expansion or contraction when the pipes change temperature. The linking parts that join the inner pipe and the middle pipe are separated from the linking parts that join the middle and outer pipe, so that a thermal bridge cannot form between the inner pipe and the outer pipe.

Abstract: A cylindrical junction part for joining together two elements of an assembly of at least two coaxial pipes, comprising an outer pipe containing an inner pipe defining an annular space preferably containing lagging material. The forged junction part forms two annular cavities defined by branches in a fork configuration at each end of said part serving to minimize stresses and fatigue in the join zone between two junction parts at the ends of two lengths of coaxial pipe to be joined together and between each length of pipe and each junction part at the ends thereof.

Abstract: A fluid transfer assembly for transporting medicinal substances. The fluid transfer assembly includes flexible tubes and a manifold each comprising silicone. The manifold has an inner protrusion and connector portions having inner walls. Free ends of the tubes are inserted into complementary configured inner walls of the connector portions until each of the free ends abut the inner protrusion, which creates a continuous uninterrupted passageway between the inner bores of the tubes through the manifold.

Abstract: A double walled assembly including a primary assembly and a secondary containment assembly. The secondary containment assembly has a second hose casing, a second fixed containment casing and a second releasable coupler assembly mounted on the second hose casing and including a longitudinally shiftable sleeve part. The sleeve part has a first longitudinal position where it can be sealingly coupled to the second fixed containment casing and a second longitudinal position where it is spaced from the second fixed containment casing and exposes the primary assembly. Non-threaded interfaces on the sleeve part and the second fixed containment casing can be sealingly coupled when the sleeve is in its first longitudinal position. The sleeve part may be slidingly or threadingly mounted on a shank that is sealingly coupled to the second hose casing.