Abstract: A threaded metallic joint has the thread surface of pin (100) and box (200) covered with a coating comprising a first layer (24) laid on the overall surface of the pin member (100), and a second layer (25) laid on part of the surfaces of either one of the pin or box members. In a first aspect, the coating comprises a first layer with high friction and anti-seize properties laid on the overall surface of the pin member (100), and a second layer (25) with low friction properties laid on specific parts of the surfaces of either one of the pin or box members. Preferably the specific surfaces are those which are in reciprocal radial contact during make-up until pin and box reach the point where shoulders (9, 10) abut. The second layer may contain polytetrafluoroethylene (PTFE). In a second aspect the first layer with a high friction and anti-seize properties laid on the overall surface of the box member (200).

Abstract: The present invention generally relates to corrosion management systems designed to deliver corrosion protection and/or the management of corrosion to a connector, a connection, a welded joint, or some other type of interface (e.g., a valve joint used to join to portions of piping). In another embodiment, the present invention relates to systems designed to deliver at least one form of corrosion, UV, salt spray, and/or fire damage protection, mitigation and/or the management to a connector, a connection, a welded joint, or some other type of interface (e.g., a flange used to join to portions of piping).

Abstract: The present invention relates to a length of pipe with a female end that is reinforced by a band of reinforcing material that extends around the female end. When the pipe and a similar adjacent pipe are threadably connected, the reinforcement material reinforces the female end against failure due to hoop stresses and/or lateral stresses. In this regard, the reinforcing material is any material with a higher resistance to hoop stresses and/or lateral stresses than the material from which the pipe is made. The present invention is also directed to manufacturing processes for manufacturing the pipe of the present invention.

Abstract: A delivery pipe (1) for the transport of solids is described. The delivery pipe (1) has a double-layer pipe body (2) which has a coupling collar (7, 8) on the inlet-side pipe end (5) and on the outlet-side pipe end (6). A first wear ring (9) and a second wear ring (10) are provided in succession in the longitudinal direction of the pipe body (2) in the region of the inlet-side coupling collar (7). The second inner wear ring (10) has a length (L) which is sized greater than or equal to half the internal diameter (ID) of the pipe body (2). As a result, wear phenomena can be reduced in the inlet-side region of the delivery pipe (1) and the service life of the delivery pipe (1) can be increased considerably.

Abstract: Provided is a packing used for a screwless coupling used for coupling two tubes such as electrical wire tubes to be coupled with each other, which is capable of exerting a water-proof effect and making fitting of the packing as easy as possible. A packing (1), which is interposed between respective ends (P1 and P1) of electric wire tubes (P and P) serving as tubular members opposed to each other, includes a main body (2) and an elastic member (3). The main body (2) are inserted through inner-diameter-openings of the respective ends (P1 and P1) of the electric wire tubes (P and P), respectively. The elastic member (3) is situated substantially at a center of the main body (2), and the respective ends (P1 and P1) of the electric wire tubes (P and P) is abutted against the elastic member (3). The electric wire tubes (P) joined with each other through the packing (1) are inserted into the body (4) constituting the coupling. Then, grip portions (40) of the body (4) are forced into a grip case (5).

Abstract: A conduit body assembly includes a conduit body having a layer of lubrication material thereon to aid in pulling wires therethrough. The conduit body includes an elongate side wall, an open upper end and a conduit body interior. At least one hub is in communication with said body interior for passage of wires therethrough. A layer of lubrication material having a low coefficient of friction is adhered to at least on portion of the surface of the body interior.

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 seal pressing device for a pipe coupling including a sealing member having an axial length and an outer curved contour pressable against an inner diameter of a seal, the sealing member having an axial row of mounting apertures for receiving therein mechanical fasteners, and at least one winged extension extending from an end of the sealing member bent inwards from the outer curved contour of the sealing member.

Abstract: There are disclosed methods of and apparatus for interconnecting lined metal pipes (110, 120), applying in particular to the offshore oil and gas industry. Corrosion is a common problem in the industry. Lining pipes overcomes the problem, but welding sections of pipe together can be a complicated and time-consuming task, requiring dedicated and sophisticated tooling. More desirable is the ability to use conventional pipe-laying equipment (20, 40, 50, 60, 70, 80, 90) with little additional tooling. As such, there are disclosed methods and apparatus compatible with known offshore connection methods, particularly where the spacing of joints on the pipe is less than 100 m. The chosen technique will not significantly impact the laying rate of the lined pipe, compared with unlined pipe.

Abstract: A coupling assembly includes a first pipe having a threaded portion and a non-threaded portion and a second pipe having a threaded and non-threaded portion. The non-threaded portion of each of the pipes is located at a free end of the first pipe and the second pipe. The coupling assembly also includes a coupling member for fixedly connecting the first pipe and the second pipe. The coupling member includes a first threaded inlet for receiving the first pipe, a second threaded inlet for receiving the second pipe and a non-threaded portion extending between the first inlet and the second inlet. The non-threaded portion of the coupling member includes an annular recess. A cross-section of the annular recess includes a vertical leg, a first angled leg extending from the vertical leg, a horizontal leg extending from the first angled leg, a second angled leg extending from the horizontal leg and a third angled leg extending from the second angled leg to the first threaded inlet of the coupling member.

Abstract: A pore-free weld connection and a method for manufacturing such a weld connection between first, second and third components (1, 3, 5, 13, 15, 17), which are connected together by means of a closed weld seam (7, 18), and of which one component (5, 17) has, at a start- and end-point (9, 11, 21, 23) of the weld seam (7, 18), a cavity (6, 19) serving for a root-side degassing of a weld puddle.

Abstract: The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.

Abstract: A clamp for a tubular hose or cable is disclosed. The clamp comprises a first clamp half, a second clamp half, and a hinge pin. The first clamp half has a first end and a second end and defines a first concave semi-cylindrical face. The first end of the first clamp half carries means for mounting the clamp. The second clamp half has a first end and a second end and defines a second concave semi-cylindrical face. The first clamp half and the second clamp half come together along a parting line and are retained together by a hinge pin. The clamp halves are provided with snap-in liners for easy use. Alternative mounts for mounting the clamp on subsea wire line or tubulars is also disclosed.

Abstract: A liner assembly including a first ring member, a second ring member, a corrosion barrier ring, a first liner and a second liner. The first ring member has a body member with a first end and a second end. The first end has a first flange and a second flange extending therefrom. The first flange and the second flange define a space therebetween. The second ring member has an extended body member having a first end and a second end. The second end has a first flange and a second flange extending therefrom. The first flange and the second flange define a space therebetween. The corrosion barrier ring is disposed between and cooperates with the first end of the first ring member and the second end of the second ring member. The first liner is configured to be secured in the space formed between the first flange and the second flange of the first ring member. The second liner is configured to be secured in the space formed between the first flange and the second flange of the second ring member.

Abstract: A method is disclosed for producing a connection between a measuring tube and at least one flange, e.g., in the case of a Coriolis mass flowmeter. In order to ensure reliable connection of the components in this case, the measuring tube can be inserted at one end over a portion through a flange bore, such that it projects out of the bore on the other side, and that the projecting end be flared out over the sealing face of the flange.

Abstract: A flange structure (10?) for a fuel supply unit of a vehicle includes at least one non-electrically conductive plastic fuel port (16?) having first and second ends. A non-electrically conductive plastic flange (20?) is integral with the fuel port between the first and second ends. The flange is constructed and arranged to be coupled with a fuel tank of a vehicle. Electrically conductive grounding structure (32) is associated with the fuel port and has an elongated portion (36) extending within the fuel port so as to be exposed to fuel, and an end (40) connected with the elongated portion. An electrically conductive hose (30) is coupled with the first end of the fuel port and is in contact with the end of the grounding structure thereby defining a discharge path such that static electricity generated when fuel flows through the fuel port can be dissipated through the discharge path.

Abstract: A welded joint of a lined pipeline has a main pipe and an extension piece having a generally tubular shape, an inner wall and an annular weld connecting the extension piece to the main pipe. A liner extends through the main pipe and partially into the extension piece. A compression ring includes a flange and a compression portion. The compression portion engages the liner internally and compresses the liner radially outwardly against the extension piece so that the liner is sealed with the compression ring.

Abstract: A pipe (1) comprising at least two pipe elements (11, 12) having internal liners of plastic material (2), the pipe elements being assembled end to end, in which the ends of the two pipe elements are welded (5) together and in which the ends of the internal liners (2) of plastic material of each of the pipe elements are joined together by a tubular junction sleeve (3) of material that withstands corrosion and that co-operate with the ends (2a, 2b) of the liners by mutual engagement via a notched surface (32), said liner ends (2) presenting reduced thickness (2a, 2b) and being bonded against the steel wall of said pipe by adhesive (4a, 4b).

Abstract: A fitting (14) incorporating a quick actuating sealing and locking device and methods of actuating the fitting and forming a seal between a length of corrugated tubing (10) and the fitting (14) are provided. The tubing (10) can be corrugated stainless steel tubing having a jacket (12) that at least partially covers the tubing. The sealing and locking device incorporates a sealing ring (24) and a loading ring (26)—received in the fitting (14), the sealing ring (24) being compressible against an end corrugation of the tubing—. The loading ring (26) can be actuated to move axially and engage the sealing ring (24), thereby compressing the sealing ring (24) into substantial engagement with the end corrugation.

Abstract: A pin-box type threaded joint for steel tubes having a contact surface (30) including a threaded portion and a nonthreaded metal-to-metal contact portion has improved leak resistance, galling resistance, and corrosion resistance particularly to crevice corrosion. The contact surface of at least one of the pin and the box is coated with a first plating layer (34) made of a Cu—Zn alloy or a Cu—Zn-M1 alloy (wherein M1 is at least one element selected from Sn, Bi, and In). Optionally, an undercoat (32) of one or both of a Ni plating layer (32a) and a Cu plating layer (32b) and an overcoat of a Sn-M2 alloy plating layer (36) (wherein M2 is one or more elements selected from Bi, In, Ni, Zn, and Cu) may be formed below and above the first layer, respectively. A solid lubricating coating (38a) and a viscous liquid or semisolid lubricating coating (38b) may also be formed atop the plating layer as a lubricating coating (38).

Abstract: A pipe flange apparatus includes a first pipe flange having a frontal face surrounding a central bore passing through the flange, the face comprising an internal flange recess extending into the flange and surrounding the bore, and a groove extending into the flange and surrounding the internal flange recess, wherein the internal flange recess comprises a textured surface at least partially surrounding the bore. Some such apparatus may also have an internal flange having first and second portions surrounding a bore extending through the internal flange, wherein the first portion is positioned at least partially within the internal flange recess of the first pipe flange and in contact with the textured surface of the first pipe flange. In at least some embodiments the second portion extends into the bore, and a first sealing ring positioned at least partially within the groove surrounding the internal flange recess.

Abstract: A pipeline (20) that lies primarily in the sea and that is formed of multiple steel pipe sections connected in tandem at pipe joints, includes a protective coating around the pipe sections and around the pipe joints. Each pipe section is first covered, at an onshore facility, by an initial coating (30, 32) that extends along at least 80% of the pipe section length while leaving its ends uncovered, to leave gripping areas (40, 42) where the steel of the pipe is uncovered so the pipe can be clamped by tools such as those with steel jaws to position and slide it axially, or turn it, or prevent it from turning. After a pair of pipe sections are connected, a completion coating (50) is applied around the pipe joint to leave the pipeline with a coating around all of it.

Abstract: The present invention relates to an exhaust system for an internal combustion engine, more preferably of a motor vehicle, with an exhaust gas turbine, with an exhaust pipe, whose inlet is fluidically connected with an outlet of the exhaust gas turbine, with a flange connection for connecting the exhaust gas turbine with the exhaust pipe which comprises a flange fastened to the exhaust pipe and attached to the exhaust gas turbine, and with a shielding apron which is so arranged and/or incorporated in the flange connection that in the operation of the exhaust system it protects a transition region between the flange and the exhaust pipe from direct admission of exhaust gas.

Abstract: A fitting incorporating a crimp sealing device and a method of forming a seal between a length of corrugated tubing and the fitting are provided. A sealing crimp is formed over at least one corrugation of the tubing, where the sealing crimp can utilize a preformed bend or bulge to form a crimp and seal. Alternatively, the sealing crimp can apply pressure radially against an outer sleeve of the fitting, such that at least one corrugation of the tubing is compressed axially or radially to form a primary seal. The outer sleeve also can include one or more gaskets arranged between the outer sleeve and the tubing for forming a secondary seal. An inner sleeve can be received radially inside the outer sleeve, and one or more gaskets can be arranged between the inner sleeve and the tubing. Further, a jacket crimp can be applied against an end of the sleeve member to contact a jacket that at least partially covers the tubing.

Abstract: The pipe fitting comprises a plastic body (2) and a reinforcement ring (3) around the outside of the plastic body (2). The reinforcement ring (3) holds the body expansion under control. The reinforcement ring (3) is positioned at the distance (d) from the front end of the pipe fitting (1).

Abstract: A coupling assembly includes a first pipe having a threaded portion and a non-threaded portion and a second pipe having a threaded and non-threaded portion. The non-threaded portion of each of the pipes is located at a free end of the first pipe and the second pipe. The coupling assembly also includes a coupling member for fixedly connecting the first pipe and the second pipe. The coupling member includes a first threaded inlet for receiving the first pipe, a second threaded inlet for receiving the second pipe and a non-threaded portion extending between the first inlet and the second inlet. The non-threaded portion of the coupling member includes an annular recess. A cross-section of the annular recess includes a vertical leg, a first angled leg extending from the vertical leg, a horizontal leg extending from the first angled leg, a second angled leg extending from the horizontal leg and a third angled leg extending from the second angled leg to the first threaded inlet of the coupling member.

Abstract: The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.

Abstract: A liner assembly including a first ring member, a second ring member, a corrosion barrier ring, a first liner and a second liner. The first ring member has a body member with a first end and a second end. The first end has a first flange and a second flange extending therefrom. The first flange and the second flange define a space therebetween. The second ring member has an extended body member having a first end and a second end. The second end has a first flange and a second flange extending therefrom. The first flange and the second flange define a space therebetween. The corrosion barrier ring is disposed between and cooperates with the first end of the first ring member and the second end of the second ring member. The first liner is configured to be secured in the space formed between the first flange and the second flange of the first ring member. The second liner is configured to be secured in the space formed between the first flange and the second flange of the second ring member.

Abstract: The invention relates to a method of protecting equipment intended to operate at high temperature in the presence of a fluid containing at least one hydrocarbon and/or carbon monoxide against corrosion by metal dusting, method in which pieces of the equipment are made from an alloy containing nickel, iron, chromium and/or aluminum, and in which said pieces of the equipment are protected from said corrosion by a protective coating. This method is characterized in that said equipment pieces protected in this way are connected to each other by means of joining pieces, said joining pieces being protected beforehand by a protective coating over at least part of their surface intended to be brought into contact with said fluid at high temperature, and in that each of the connections intended to be subjected to said corrosion is produced by external welding of the ends of the joining piece with said pieces of equipment.

Abstract: A leak detection feature for a fluid conduit is provided. 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 is disclosed herein. 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: A delivery pipe (1) for the transport of solid material includes a tubular body (2) comprised of an inner pipe (3) and an outer pipe (4). A coupling collar (7) is fixed to the outer surface (8) of the outer pipe (4) by adhesion at each pipe end (5, 6) of the tubular body (2). The coupling collar (7) includes a radially inwardly oriented circumferential shoulder (12) on its terminal end (11), with the inner diameter (Dki) of the collar sized smaller than the outer diameter (Dra) of the tubular body (2). This enables a stable adhesive securement of the coupling collar (7) to a pipe end (5, 6). At its collar end (17) distal to its terminal end (11), the coupling collar (7) has a circumferential slanted surface (18) which expands from its inner circumferential area to the outside, with a slanted surface formed underneath for accumulation of an adhesive bead (20).

Abstract: A device (1), for sealing untight couplings and press connections consists of a pressing piece (2) which encompasses the periphery of the pipe, with which an additional seal (6) is pressed onto the intermediate space between the coupling (4) and the pipe (5), and of a counter-piece (3) which encompasses the coupling body and by way of which the pressing piece (2) is pulled in the direction of the coupling body and fixed with a form- and force-fit. The pressing piece (2) has essentially the shape of a hollow cylinder with an outer thread with an inner diameter which is equally large as the outer diameter of the pipe (5), and an outer diameter which is larger than the maximal diameter of the coupling (4). The counter-piece (3) likewise has essentially the shape of a hollow cylinder. The inner diameter over a part of the length of the counter-piece (3) corresponds to the diameter of a coupling (4) between the outer beads.

Abstract: A fluid conduit includes a hose and a fitting. The hose has a terminal end having a first portion along which an outer layer is laminated to an inner layer and a second portion along which the inner layer extends from the outer layer. The fitting includes a receiving portion and a coupling portion. The receiving portion has a first inner surface defining a first lumen portion, and is configured to receive the first portion of the terminal end, and for crimping to the hose. The coupling portion has a second inner surface defining a second lumen portion for receiving the second portion of the terminal end. The first lumen portion and the second lumen portion are in fluid communication with each other.

Abstract: A threaded metallic joint has the thread surface of pin (100) and box (200) covered with a coating comprising a first layer (24) laid on the overall surface of the pin member (100), and a second layer (25) laid on part of the surfaces of either one of the pin or box members. In a first aspect, the coating comprises a first layer with high friction and anti-seize properties laid on the overall surface of the pin member (100), and a second layer (25) with low friction properties laid on specific parts of the surfaces of either one of the pin or box members. Preferably the specific surfaces are those which are in reciprocal radial contact during make-up until pin and box reach the point where shoulders (9, 10) abut. The second layer may contain polytetrafluoroethylene (PTFE). In a second aspect the first layer with a high friction and anti-seize properties laid on the overall surface of the box member (200).

Abstract: An improved gas riser assembly for transmitting gas from an underground gas service line to a meter manifold includes an elongated plastic tube having a first end and a second end. The first end is adapted to be connected below ground to the underground gas service line and the second end is adapted to be disposed above ground. A protective casing is annularly received about the elongated plastic tube. The protective casing has a first end adapted to be disposed below ground and a second end disposed above ground. An adapter is sealingly connected to the second end of the elongated plastic tube for fluidly connecting the elongated plastic tube to the meter manifold. The adapter is also sealingly and weldiessly connected to the second end of the protective casing. To assemble the gas riser, an insert member of the adapter is connected to the second end of the elongated plastic tube.

Abstract: A coupling apparatus includes a pair of cylindrical coupling main bodies which are concentrically and oppositely arranged to each other and which have the same structure as to each other, liners which are accommodated in the coupling main bodies respectively, and a release preventing structure which can selectively resist a rotational force applied to the coupling main bodies coupled with each other, so that a coupling of the coupling main bodies is maintained.

Abstract: A coupling apparatus includes a pair of cylindrical coupling main bodies which are concentrically and oppositely arranged to each other and which have the same structure as to each other, liners which are accommodated in the coupling main bodies respectively, and a release preventing structure which can selectively resist a rotational force applied to the coupling main bodies coupled with each other, so that a coupling of the coupling main bodies is maintained.

Abstract: A coupling for a corrugated conduit has a housing of a rigid plastics material with two resilient spring catches on opposite sides to engage between corrugations on the conduit. A layer of a softer, elastomeric material is continuously joined on both the interior and exterior of the housing. On the interior, the softer material extends on a tapering surface to diametrically seal with a range of conduits. On the exterior, the layer of softer material forms both a flange on an annular ledge to seal with a cooperating coupling and manual gripping regions.

Abstract: A tubular member 12 having an internal and/or external metal thread 18, 20 at one end thereof, at least part of the thread 18, 20 being coated with an alloy of copper and tin, said alloy containing 5 wt % to 95 wt % copper. The tubular member 10 can be combined with another tubular member 14, 16 to provide a threaded connection 10 having improved galling resistance.

Abstract: A pipe fitting arrangement in at least one embodiment comprises a pipe, a housing defining at one end an opening for insertion of an end of the pipe, a metallic grip ring and a sealing ring downstream the grip ring in the insertion direction of the pipe, the location of both the grip ring and the sealing ring between the housing and the pipe being defined by the housing, wherein the grip ring is provided with a first amount of first internal teeth directed toward the pipe in a first direction with a first inclination in the pipe insertion direction for engagement with the pipe, and with a second amount of second external teeth directed towards the housing in a second direction with a second inclination away from the pipe insertion direction for engagement with the housing. Further disclosed herein is a method for forming such a pipe fitting arrangement.

Abstract: A pipe connecting structure which can prevent electrical charge of a plastic coated metal pipe using a simple structure. The structure includes beads 5a, 5b, 5c protruding from the outer surface of the end of a plastic coated metal tube 3, which is obtained by coating the outside of a bare metal pipe 1 with a nonconductive plastic film 2. The plastic film 2 is removed from the tip of the bead 5a to expose the circumferential surface of the bare metal pipe 1, the exposed portion is made to contact the inner surface of a conductive tube 4, and the plastic coated metal tube 3 and the conductive tube 4 are connected together.

Abstract: A pipe liner connector suitable for connecting pipe sections that comprise a liner is described. The pipe liner connector comprise vents and/or venting grooves which act to balance the pressure between the micro-annulus, formed between the liner and the pipe sections, and the pipe bore formed when the pipe sections are connected together. The inclusion of these features helps prevent the collapse or the uncontrolled distortion of the pipe liner connector during pressure cycles in operating pipelines.

Abstract: An abrasive material transferring pipe is lined with a cured shape memory retaining elastomeric liner. The inner surface of the pipe is in contact with the outer surface of the elastomeric liner. When the liner is not under tension, the outer diameter of the elastomeric liner is larger than the inner diameter of the pipe. Expansion pressure by the liner maintains the liner in the pipe.

Abstract: A structural member such as a strut includes a composite material tube having metal end fittings that are attached to the tube by co-bonded, double shear joints. The double shear bond joint construction reduces the residual stress on the bonds that result from mismatch of the coefficients of thermal expansion of the composite tube and the metal end fittings. The ends of the fittings that are bonded to the tube may include a stepped profile that functions to limit the peak stresses in the bonds.

Abstract: A fitting and an associated grommet are provided for supporting a conduit penetrating a panel and limiting energy transfer between the conduit and panel. The fitting may include a grommet having annular first and second sections spaced apart from one another and an annular wall extending between the first and second sections such that the wall and first and second sections define a bore. A plurality of ribs protrude from the annular wall, the ribs being distributed circumferentially around the annular wall and spanning between the first and second sections. A tubular liner extends through the bore of the grommet and contacts the first and second sections. The plurality of ribs extend into the bore, and at least some of the ribs contact the liner.

Abstract: The liner assembly (10) is for use in a joint between two pipe segments. The assembly (10) includes a first ring member (50), a second ring member (60) and a corrosion barrier ring (70). The first ring member (50) is configured to cooperate with a first liner (30) inserted in a first pipe segment (12). The second ring member (60) is configured to cooperate with a second liner (34) inserted in a second pipe segment (14) to be joined to the first pipe segment (12). The corrosion barrier ring (70 is disposed between and cooperates with the first ring member (50) and second ring member (60). The corrosion barrier ring (70) includes opposing indented ends (72) cooperating with the second ends (54, 64) of the first and second ring members (50, 60). The second ends (54, 64) of the first and second ring members (50, 60) define corresponding registering shapes to cooperate with the opposing indented ends (72) of the corrosion barrier ring (70).

Abstract: A tubular coupling system and method; the system and method in at least certain aspects, using a coupling member with an interior protective ring that has at least one inner energizing member which, upon compression, forces the body of the coupling member against an interior wall of the coupling thereby inhibiting corrosive material from contacting the coupling's interior wall or, in the event some corrosive material does enter this area, holding the interior protective ring against the coupling's interior wall so that the corrosive material may not exit this area, thus inhibiting or preventing a continuous flow of corrosive material.

Abstract: An insert for use in connecting two lengths of pipe, each having a plastic liner. The insert consists of an inner tubular member of plastics material for connection at either end to the plastic liners of two pipe lengths, an insulating sleeve surrounding a central portion of the inner tubular member and a ring of heat-resistant material overlying a part of the insulating sleeve to be positioned, when in use, beneath a location at which the pipe length is butt welded, wherein the insulating sleeve includes an insulating material which is at least partially enclosed with a sheath, such that the sheath can be mechanically connected to the interior of one pipe length.

Abstract: The invention relates to a concrete pipe having a corrosion-resistant inner lining consisting of plastic whose one end is made as a pipe spigot end piece and whose other end is made as a pipe socket end piece to receive a pipe spigot end part of the following pipe, with the plastic pipe projecting by an overhang at the pipe spigot end part, with an all-round peripheral groove being arranged at the pipe interior of the plastic pipe to accept an elastomer seal and with the overhang which extends in a straight line and is insertable into the pipe socket end part being so long that it covers the peripheral groove. In accordance with the invention, the inner lining consisting of plastic also lines the pipe socket end part of the concrete pipe.

Abstract: A simple-to-use apparatus install around a pipe which passes through or under a building partition and maintains the structural integrity of the pipe in accordance with a typical building codes. More specifically, the apparatus preferably includes an inner sleeve composed of an elastomer (e.g. synthetic or natural rubber) or a foam-like material that surrounds the entirety of the portion of a pipe or conduit that passes through the building partition. The inner sleeve is entirely surrounded by an outer sleeve composed of a harder material than the inner sleeve. The inner sleeve and the outer sleeve can each be formed by extrusion, molding, or any other conventional manner. The inner sleeve maintains a circumferential spacing between a pipe passing through the apparatus at the outer sleeve thereby isolating the pipe from forces exerted by the building partition.