Abstract: A method of installing a subsea pipeline for tie-in to a subsea structure includes laying, using a pipe laying vessel, an intermediate section of the pipeline on to a pipe restraint device, wherein the pipe restraint device is at or near the subsea structure, or is at or near a location at which a subsea structure will be installed, and the pipe restraint device restricts transverse movement of the pipeline. The intermediate section of the pipeline is configured to be tapped at or near the pipe restraint device for providing fluid communication between the pipeline and the subsea structure.

Abstract: A liquid chromatography-mass spectrometry (LC-MS) apparatus including an ionization source coupled to a mass spectrometer and a liquid chromatographic (LC) system coupled to the ionization source. The LC system comprises multiple fluidic streams alternately connectable to the ionization source, thereby assigning a detection time window to each fluidic stream from the multiple fluidic streams when connected to the ionization source. The LC-MS apparatus further comprises a controller configured to carry out steps of monitoring an ionization current of the ionization source for the multiple fluidic streams and identifying differences in flow conditions between the multiple fluidic streams based on the monitored ionization current.

Abstract: Illustrative embodiments of a meter box and couplings, either separately or in combination, are provided. An illustrative embodiment provides a valve coupling that is disposed through a wall of the meter box such that a first portion of the valve coupling extends exterior of the meter box and a second portion of the valve coupling extends interior of the meter box. An outlet coupling is disposed through the wall of the meter box such that a first portion of the outlet coupling extends exterior of the meter box and a second portion of the outlet coupling extends interior of the meter box. A telescoping tube is located in the meter box, extended into and movable relative to, and in fluid communication with, at least one of the second portion of the valve coupling and/or the second portion of the outlet coupling. The telescoping tube varies a distance between the valve coupling and the outlet coupling within the meter box.

Abstract: A sanitary in-line sight glass assembly is provided having separate first and second hollow connection bodies and a transparent tube retainable between and within the connection bodies when the connection bodies are secured together in an end-to-end abutting relationship. Gaskets are located within the connection bodies at opposite ends of the transparent tube and a clamp is provided for securing the ends of the connection bodies together such that the gaskets are compressed and form seals. The connection bodies include sidewalls having at least one opening through which the transparent tube is exposed for providing a viewing window into a flow path defined by the assembly. The clamp may be a circumferentially-extending clamp having ends secured together with a winged fastener able to be gripped by the hand of an installer such that the assembly can be assembled and disassembled manually without the use of a tool.

Abstract: Pipe connector for coupling a first-end pipe and a second-end pipe that includes intermediary attachment connectors for each of the first-end and second-end pipes. The attachment connectors include O-ring slots machined into an external perimeter surface and a movable sleeve that engages with the intermediary attachment connectors to form a seal between the O-ring slots and an internal perimeter surface of the sleeve.

Abstract: This invention provides a solar fluid heating panel with fluid conduits that allow a fluid to be heated by the sun. It also provides a mounting system and weather sealing system that allow the panels to replace a traditional roof. The roof replacing panels can be installed quickly using mounting brackets attached to roof purlins. The panels can allow natural ambient light to enter the building while harnessing the sun's energy to heat fluid within the conduits.

Abstract: Exemplary embodiments are directed to a system for sampling sub-slab soil gas having an adaptor body that includes a first barbed portion, a collar portion, a second barbed portion, an internal cavity that axially passes through the length of the adaptor body, and a coupling portion. The system further includes one or more extensions such as a fitting extension, a filter extension, a sieve extension and a length extension, each of which are threadably retainable with the coupling portion of the adaptor body.

Abstract: Illustrative embodiments of a meter box and couplings, either separately or in combination, are provided. An illustrative embodiment provides a valve coupling that is disposed through a wall of the meter box such that a first portion of the valve coupling extends exterior of the meter box and a second portion of the valve coupling extends interior of the meter box. An outlet coupling is disposed through the wall of the meter box such that a first portion of the outlet coupling extends exterior of the meter box and a second portion of the outlet coupling extends interior of the meter box. A telescoping tube is located in the meter box, extended into and movable relative to, and in fluid communication with, at least one of the second portion of the valve coupling and/or the second portion of the outlet coupling. The telescoping tube varies a distance between the valve coupling and the outlet coupling within the meter box.

Abstract: A plug-in coupling for connecting a first double-walled vacuum-insulated cryogenic line to a second. The plug-in coupling has a coupling plug and a coupling socket. The coupling plug can be plugged into the coupling socket, these being retained in a plugged-together state by fixing means. A guide column is arranged on the coupling plug or the coupling socket. The guide column has arranged on it elastic means which, in the assembled state of the plug-in coupling, are subjected to stressing and which subject the coupling plug and/or coupling socket to an elastic force which strives to release the coupling plug and coupling socket from one another as soon as the fixing means no longer hold the coupling plug and coupling socket together. The elastic energy stored in the elastic means ensures that, in the event of an emergency, the coupling plug and coupling socket are quickly released from one another.

Abstract: A receiver having a horizontally elongated chamber within a housing, the chamber having a convex triangular cross-section and a dump flap defining a bottom vertex of the triangular cross-section, with a horizontal air/vacuum resin material inlet connecting to the chamber, and a horizontal air/vacuum outlet leading from and connected to the chamber.

Abstract: An assembly of a male coupling part 200 and a stiff tube 100 is disclosed, the stiff tube 100 having an attachment means 110; and the male coupling part 200 requiring a relative axial displacement between the male coupling part 200 and the stiff tube 100 for connecting to a female coupling part 500, the male coupling part 200 comprising an axial through opening 210. The Assembly further comprises an element 300 detachably connected to the male coupling part 200 and slidably attached to the stiff tube 100, the element 300 having an opening 310 allowing relative axial displacement 340 between the male coupling part 200 and the stiff tube 100, and the attachment means 110 being movable within the opening 310. A method for coupling and un-coupling the assembly to a female coupling part is also disclosed.

Abstract: A connector for facilitating the connection of one piece of tubing to another so that fluid can flow from one piece to the other in a sterile manner. Characteristics of the connector include, but are not limited to, a flange at one of the connector, the flange comprising a recess for storage of at least part of a protective shield which Is removable after the flange is connected to the flange of a second connector.

Abstract: A modular, aerogel-based vacuum insulated pipe section comprising an outer conduit; an inner conduit concentrically disposed within the outer conduit with aerogel insulation and a condensable gas being disposed in the insulation space between the concentric conduits. As a stand-alone pipe section, the insulation space is at a pressure within the range of from about 100 microns Hg to about 1000 microns Hg. However, in operation, when a cryogenic fluid is traversing the inner conduit, the condensable gas condenses and the pressure within the insulation space is further reduced to range of from about 1 microns Hg to about 5 microns Hg. The vacuum insulated pipe section further includes a coupling arrangement disposed on a first end of the inner conduit and a second end of the inner conduit, the coupling arrangement configured to engage or mate with a corresponding end of another modular vacuum insulated pipe section.

Abstract: Pipe connector for coupling a first-end pipe and a second-end pipe that includes intermediary attachment connectors for each of the first-end and second-end pipes. The attachment connectors include O-ring slots machined into an external perimeter surface and a movable sleeve that engages with the intermediary attachment connectors to form a seal between the O-ring slots and an internal perimeter surface of the sleeve.

Abstract: A method for manufacturing an air duct includes providing a tubular body having at least one open end which is inserted into an internal cuff mold to form an internal cuff that is secured to and axially extends from the tubular body. The tubular body and the internal cuff are removed from the internal cuff mold and then inserted into an external cuff mold to form an external cuff that is secured to and radially extends from at least the internal cuff. The tubular body with the internal cuff and the external cuff is then removed from the external cuff mold.

Abstract: An air duct system for transferring air or the like from one component to another includes a tubular body with an exterior surface, an interior surface, and an end which connects the exterior surface to the interior surface. The end has a diameter no larger than the exterior surface. The internal cuff connects to the exterior surface and extends axially from the end of the tubular body. The external cuff connects to the internal cuff and the exterior surface, and extends axially and radially from the internal cuff and the exterior surface. The external cuff is made from a material relatively harder than a material used for the internal cuff.

Abstract: An electric compressor includes: an electric motor; a compression mechanism driven by the electric motor; a housing accommodating the electric motor and the compression mechanism; an accommodation part provided on a sidewall of the housing and accommodating a drive circuit for driving the electric motor; a lid contacting the accommodation part and fastened to the accommodation part by a fastening portion; a sealing member sandwiched between the accommodation part and the lid so as to seal between them. The accommodation part has a wall standing from the sidewall of the housing, and a step is provided on a standing end surface of the wall orthogonal to a standing direction of the wall, at a midway position from an inside toward an outside of the accommodation part.

Abstract: An alignment device for a wafer in an industrial process assembly includes an inner surface shaped to conform to an outer surface of a wafer, an outer surface comprising at least two cams; and two ends connecting the inner surface to the outer surface. The two ends are positioned such that when the alignment device is positioned on the outer surface of the wafer, the alignment device extends more than one hundred eighty degrees around the wafer.

Abstract: A magnetic flowmeter flowtube assembly includes a conduit having a first end with a first flange and a second end with a second flange. A fluoropolymer liner is disposed within and extending through the first flange, the conduit and the second flange. A first lining protector is mounted to the first flange and a second lining protector mounter to the second flange. A first spring-energized seal is disposed between the first lining protector and the fluoropolymer liner. A second spring-energized seal is disposed between the second lining protector and the fluoropolymer liner.

Abstract: A valve flange joint includes a valve flange and first and second duct flanges. The first and second duct flanges include respective first and second mating portions. The first mating portion includes a first duct rim, a first duct face in contact with a first face of the valve flange, and a first slot. The second mating portion includes a second duct face in contact with a second face of the valve flange, and a second rim. In an embodiment, the valve flange includes a tab that extends in an axial direction through the first slot and includes an inner surface radially inward of an outermost portion of the second mating portion. In another embodiment, a first thickness is defined between the first flange face and the second flange face. Second and third thicknesses are also defined for the first and second mating portions. The three thicknesses are substantially similar.

Abstract: A chromatography and fluidic device with connections capable of automated component changing, diagnostic leak and current sensing. The chromatography-electrospray device contains a chromatography column, a pre-column, a spray emitter, or other fluidic component imbedded within one or more inserts. The inserts are robotically placed in receiving hardware, and a “plug and play” compression fitting connection mechanism makes the fluidic seals in an automated fashion. A plurality of sensors capable of detecting leaks is situated in the device near leak-prone regions. The electrospray emitter has a current sensing electrode in proximity of the electrospray region, capable of detecting the electrospray current. In conjunction with an electronics system, these sensors allow for system and component diagnostics. The diagnostic information may then be used for manual or automated system repair.

Abstract: A fluidic compression connection includes a first sealing device having a fluid inlet at an entry opening and a first mating surface at an exit opening end; a second sealing device having an interchangeable plug-and-play consumable insert, a second mating surface at the entry opening end and a third mating surface at the exit opening end; a third sealing device having a fluid outlet at the exit opening and a fourth mating surface at the entry opening end; a mechanical support; and a drive force mechanism, wherein the first mating surface opposes the second mating surface and the third mating surface opposes the fourth mating surface, and wherein the drive force mechanism is configured to apply a substantially axial drive force opposed by the mechanical support, to compress the first, second, and third sealing devices and create a leak-resistant seal in the connection between the sealing devices.

Abstract: A fire sprinkler support assembly includes a leg configured to extend transverse to each of a pair of adjacent parallel spaced beams. The leg includes levered clamp assemblies that are configured for connecting and supporting each end of the leg to a corresponding one of the beams. The levered clamp assemblies include a first plate and a second plate, each plate configured to straddle the beam. The levered clamp assemblies also include a lever assembly. The lever assembly includes a rod passing through corresponding rod openings in the first and second plates, and a lever pivotally connected to one end of the rod. The lever includes a cam surface disposed adjacent to the first plate. The lever assembly is configured to reduce spacing between the plates upon actuation of the lever, whereby the leg is secured to the beam.

Abstract: A coupling (20) capable of connecting together two piping sections (30, 30) having the same outer diameter, two piping sections (40, 40) having the same inner diameter, or two piping sections (30, 40) having different diameters. The coupling (20) can have a unitary tubular structure and it can be made of the same material and in the same manner as conventional PVC piping. Installation of the coupling (20) during construction of a passageway can be accomplished in same manner as is conventionally accomplished with three distinct types of coupling.

Abstract: A sealing element that includes a hollow body of metallic material and first and second male sealing members formed at a respective end of the body. The respective male sealing member has an external spherical contact surface designed for mating with a corresponding internal conical contact surface of a female sealing member so as to form a fluid-tight seal between the male sealing member and the female sealing member when their contact surfaces are pressed against each other. Also, a coupling device and a valve device provided with the sealing element.

Abstract: A connector assembly for a fluid system comprising a flexible tube with a series of convolutions integrated with a connector having tubular portions disposed at a sharp angle to each other. In one form, the connector and flexible hose are made from the same material, nylon-12 and are spin welded together.

Abstract: A tubular coupling member is configured to couple a fluid delivery pipe located external to a building with a service pipe located inside the building. The tubular coupling member includes a longitudinal axis and a pipe extending along the longitudinal axis. The pipe has a first end with a straight connector portion and a second end configured to couple to the service pipe. The straight connector portion includes an outer surface and a terminating taper. The outer surface has a substantially uniform outside diameter, and the taper extends radially inward from the outer surface toward the longitudinal axis.

Abstract: A fire sprinkler support assembly includes a leg configured to extend transverse to each of a pair of adjacent parallel spaced beams. The leg includes levered clamp assemblies that are configured for connecting and supporting each end of the leg to a corresponding one of the beams. The levered clamp assemblies include a first plate and a second plate, each plate configured to straddle the beam. The levered clamp assemblies also include a lever assembly. The lever assembly includes a rod passing through corresponding rod openings in the first and second plates, and a lever pivotally connected to one end of the rod. The lever includes a cam surface disposed adjacent to the first plate. The lever assembly is configured to reduce spacing between the plates upon actuation of the lever, whereby the leg is secured to the beam.

Abstract: A simple flexible coiled tubing connector couples the ends of two separate sections of tubing so that mutual axial tensile forces can be transferred between the two sections. The tubing connector is intended for use with tubing which may be coiled on a storage reel and freely run through a coiled tubing straightener or tensioning device. The tubing connector is not required to contain pressure, transfer compressive axial loads, torsion, or loads transverse to the axes of the tubes.

Abstract: A joint assembly, including a first member including an indicator; a second member operatively arranged to sealingly engage the first member via a seal element, the indicator operatively arranged to provide an indication when the first member has been engaged with the second member.

Abstract: An expansion repair coupling for interconnecting two facing ends of a cut pipe comprises a tubular body, a spigot slidably and rotatably received therein and a locking mechanism to selectively lock or unlock the rotation of the tubular body relative to the spigot. An end of the spigot extends outward from the tubular body to receive a coupling that connects to one end of the cut pipe. A radially enlarged section on the spigot has a sealing mechanism that sealably engages an interior surface of the tubular body. The locking mechanism, engaged by collapsing the spigot into the tubular body or disengaged by extending the spigot therefrom, facilitates a push and twist connection at both ends of the pipe to wipe the adhesive disposed therebetween and obtain a better seal. Preferably, the locking mechanism comprises a socket having spigot engaging members that cooperatively engage socket engaging members on the spigot.

Abstract: A gripping device may be used to grip an inserted member. The gripping device has a body. The body defines a passage extending therethrough between opposite longitudinal ends. The body has an outer surface and an inner surface. The body includes at least three gripping elements spaced apart around the inner surface. Each of the gripping elements has a gripping surface for gripping an outer surface of the inserted member. Each of the gripping elements is movable upon application of a radial inward force to the outer surface of the body to reduce the spacing between adjacent gripping elements.

Abstract: A method of joining two portions of an underwater pipeline laid on the bed of a body of water to conduct fluid and/or gas, the method including: joining a telescopic sleeve, having a first coupling head, to a first end of a first pipeline portion above the body of water; laying the first end, the telescopic sleeve, and the first coupling head on the bed of the body of water; joining a second coupling head to a second end of a second pipeline portion above the body of water; laying the second end and the second coupling head on the bed of the body of water, close to the first coupling head; roughly aligning the first and second coupling head in the body of water; and clamping the first and second coupling head to each other in the body of water.

Abstract: A coupling for pipes having an inside wall surface comprises first and second open ends, a bore, a side wall around the bore, and a longitudinal axis. At least the second open end is a male end and has at least one axially oriented protrusion protruding from the second open end for dislodging debris from the inside wall surface of the pipe when inserted therein.

Abstract: An observation valve structure includes an inlet pipe joint. The inlet pipe joint has an outer threaded section at an inner end thereof, an annular guide groove in the inlet pipe joint, and guide holes at the inner end thereof. The annular guide groove communicates with the guide holes. The inlet pipe joint has a stop trough at the inner end thereof for insertion of an annular gasket. A holder is provided on top of the connector body. The holder has two threaded holes at two sides thereof close to the inlet end of the connector body. A plate is positioned on the holder by two screws which are screwed in the threaded holes. The plate has a top surface with characters which are perpendicular to each other, a position hole disposed close to the middle character, and two apertures disposed at an outer side of the other two characters for insertion of the two screws. The handle has an indication plate. The indication plate has a positioning bead hole for insertion of a positioning bead.

Abstract: A universal kit of selected connector fittings for connecting hose ends together, forming a web of hoses of a vehicle vacuum or pressure system, where the fittings are maintained in a container and include, as a primary connector, a CNC Rotator assembly, that has a metal like rotator sleeve that receives a nylon collar press fitted therein that includes a locking arrangement formed therein, alongside a molded helix thread, which locking arrangement is to pass and lock to a ridge of a snap-barb fitting, and a circular plate of a twist-barb fitting is fitted to turn in the molded helix thread to releasably lock in the rotator sleeve when twisted, and the snap-barb and twist-barb fittings include hose barbs to connect hose ends thereto, and the kit further includes items such as quick coupling tees, elbows, coupling unions and shrink sleeves for forming a web of vacuum or pressure hoses for a vehicle.

Abstract: A coupling for coupling ends of a rigid conduit together having a removable stop. A cylindrical sleeve has a removable stop that permits positioning of the cylindrical sleeve entirely on one end of a conduit having limited axial movement that is being repaired. The cylindrical sleeve is then axially or longitudinally positioned over a gap between the ends of the conduit being repaired and the retractable stop is lowered and positioned within the gap. A window within the cylindrical sleeve facilitates positioning of the retractable stop within the gap. Set screws secure the ends of the conduit within the cylindrical sleeve. Rigid conduit may be repaired without having to disconnect the distant or remote ends of the rigid conduit.

Abstract: A multi-component tubular coupling is provided for wellhead assemblies. In one embodiment, the multi-component tubular coupling may include a first tubular member, a landing ring, and a second tubular member. The second tubular member may include internal threads, lock screws, or any combination thereof to couple to a wellhead component. In another embodiment, the multi-component tubular coupling may only include the first tubular member and the landing ring. In such an embodiment, a wellhead component may be secured to the coupling via lock screws.

Abstract: A method for joining fluid carrying steel pipes together including the following steps. Identifying a subject pipe section to be replaced and intercepting the fluid flow by fastening stoppers inside of pipe portions upstream and downstream from the subject pipe section. Removing the subject pipe section, leaving in place upstream and downstream pipe portions. Inserting along each of the first and second pipe portions a protective stopper and chamfering the edges of those pipe portions and then mounting first and second sliding sleeves with sealing rings thereover. Removing the protective stoppers from the pipe portions and positioning between those pipe portions a new connection piece. Displacing the first and second sliding sleeves onto the connection piece so that sealing rings are arranged on the connection piece and fixing the sliding sleeves to the pipe portions and to the connection piece.

Abstract: A pipe connection includes a main body, an inner sleeve, a water inlet connector, a water outlet connector, a circuit board, a control panel, at least one battery, a magnetically activated detector, an impeller, and a magnetic member. In operation, when the water flows through the impeller, the impeller is rotated, and the magnetic member is moved to pass by the detector intermittently so that the detector can transmit a detected signal to the circuit board which can calculate the rotation speed of the magnetic member so as to obtain the water flow rate. Thus, the pipe connection can calculate and indicate the water flow rate in the pipe so that when the flow rate of the output water from the pipe reaches a preset value, the user can shut the water flow to regulate and save the water flow.

Abstract: An electrical conduit fitting comprising a metallic housing and a plurality of apertures in wall of the metallic housing. The plurality of apertures are configured to reduce weight of the fitting. The fitting also comprises a holding arrangement such as set-screw, locknut, screw-in connection, clamp etc. at each extremity of the metallic housing.

Abstract: The present invention relates to a pipe joint for connecting tubular conduits, in particular for connecting lengths of pipe to form a fluid transport system. The pipe joint (2) comprises: a conduit (14) formed with at least one connection end (18). The or each connection end (18) comprises: a wall defining a receiving recess (8) for receiving an end of a pipe length (4); a groove (12) formed to a depth in an internal surface of the wall of the receiving recess (8); and a channel (34) communicating between the groove (12) and an external surface of the connection end (18). The pipe joint further comprises a connector (30) formed from a length of material which is seatable within the groove (12) via the channel (34) and which is wider than the depth of the groove (12) so that when seated within the groove (12) the connector (30) extends into the receiving recess (8).

Abstract: A connector unit for connection of a fluid line to the mattress of a waterbed. The unit comprises a first connecting piece assigned to the waterbed mattress, a second connecting piece assigned to the fluid line and a connecting sleeve which while in mounted position encompasses the first connecting piece and the second connecting piece in part at least. At least one of the connecting pieces has a thread and is provided as a screw type socket. The connecting sleeve is provided with a thread for threaded engagement with said at least one screw type socket. The connecting piece without thread is of clamping type and provided with a collar which protrudes radially outward.

Abstract: The invention concerns a device for connecting first and second air ducts using a connecting element for transferring an air stream between the air ducts, wherein the connecting element can assume various snap-in positions relative to the first air duct.

Abstract: A fitting, particularly for connecting two pipes, comprising: a support sleeve (1), having a first connection segment (11a) at a first end, and having a second connection segment at an opposite second end, wherein at least the first connection segment (11a) is formed so that a pipe segment (70) can be pushed onto it and having a middle segment (12) disposed between the first and the second connection segment (11a, 11b), wherein the middle segment (12) comprises a fixing element (32, 34) extending at least partially around the support sleeve and having a separable ring element (20) having an inner diameter substantially corresponding to an outer diameter of the middle segment (12) and designed for being placed on the support sleeve (1) and being retained by the fixing element (32, 34) in the middle segment (12) in a fixed position.

Abstract: A method and apparatus are disclosed for securing a flexible pipe (101) to a further flexible pipe (102) in an end-to-end configuration. The apparatus includes an elongate tubular element (30) comprising a first and second end (33, 34) and an outer surface comprising a raised central region (35). At least one vent passage (55) extends at least partially across the raised central region (35).

Abstract: Device for internal gripping of an exhaust pipe having a gripping device which in turn has a first and a second protrusion, which are mutually connected to allow mutual displacement along a first axis (A), in which this displacement imposes a mutual change of position of the first and second protrusions along a second axis (B), perpendicular to the first axis. The device also has a manoeuvering device for achieving the mutual displacement of the two protrusions. The manoeuvering device comprises an advancement unit arranged to displace the first protrusion along the first axis (A) in relation to the manoeuvering device, and a connecting link, which connects the manoeuvering device to the second protrusion and which limits the displacement of said second protrusion along the first axis (A) relative to the manoeuvering device during the displacement of the first protrusion by the advancement unit.

Abstract: An insertion coupling which can be used for example for a vacuum line consists of an insertion part and a sleeve part (1), wherein a locking element (5), which can be brought into engagement with a retaining rib of the insertion part, and an actuation element (10) are integrally formed on a housing tab (9) which extends in an arc-shaped manner around a longitudinal axis of the sleeve part (1) and can be elastically deflected radially. A movement of the locking element (5) in a radially outward direction and thus a release of the engaged state between the sleeve part (1) and the insertion part is possible by moving the actuation element (10) in an actuation direction (13). A construction which is particularly simple in design is produced owing to the small number of parts. The sleeve part (1) is provided with a window, by means of which a correct engaged state of the locking element with the retaining rib can be visually checked.

Abstract: A connector is provided for coupling a first conduit to a second conduit. The connector includes a first hub configured to connect to the first conduit and a second hub configured to connect to the second conduit. A flexible body is configured to sealingly connect to the first hub and the second hub. At least one clamp is provided for securing the flexible body to the first hub or the second hub. The flexible body includes an end having an annular groove therein to form an inner portion of the end and an outer portion of the end, wherein the annular groove is configured to eliminate radial deflection of the inner portion of the end when flexible body undergoes pressure from the at least one clamp.

Abstract: A method for joining molecularly oriented pipe in which a coupling is provided which is formed of a material other than molecularly oriented pipe, such as ordinary PVC pipe. The coupling if formed as a tubular body with a combination sealing and restraint mechanism located in each of two opposing end openings of the coupling that seal and restrain mating plain spigot ends of the molecularly oriented pipe. Because the coupling is made of a material such as ordinary PVC, the sealing and restraint mechanisms can be installed in internal grooves provided in the coupling interior during normal pipe belling operations without introducing unacceptable levels of stress or strain into the product.