Abstract: A system for connecting drill pipe to facilitate bi-rotational drilling and methods of bi-rotational drilling using the system are described. The system includes a rotatable sleeve disposed on the end of one pipe joint and a guide on the other pipe joint in which both sleeve and guide have mating threads to pull the joint together and pipe end structures to prevent rotation when the joints are pulled together.

Abstract: A connection system for pipes in refrigeration plants, comprising an adapter that is adapted to enable the connection of a pipe to a device that is adapted to be used in a refrigeration plant, the adapter being provided with a groove that is adapted to prevent the extraction of the adapter from a connection portion of the device, the groove being adapted to be engaged by a conical locking ring that forms part of the connection portion of the device.

Abstract: A coupling system including a coupling for fastening to one end of a pipe via a fastening connection is provided. The coupling system includes a safety fastener device in the form of a sleeve surrounding the fastening connection and having a first end for welding to the pipe, and a hook-forming second end for co-operating with the coupling in such a manner that the hook is suitable for providing fastening between the coupling and the pipe in the event of the fastening connection is damaged.

Abstract: Sleeve part of a pipe joint wherein the sleeve part includes a chamber space, into which the opposing butt ends of the pipe parts to be connected together are placed such that the sleeve part extends a distance from the point of connection of the pipe parts to be connected together on top of both pipe parts. The sleeve part includes heating member, such as resistance wires. As a consequence of the heating of the resistance wires a joint forms between the sleeve part and the pipe parts. An inspection aperture is formed in the sleeve part through the wall of the sleeve part from the exterior to the interior to a point where the positioning of the opposing butt end surfaces of the pipe parts to be connected together can be verified. The invention also relates to a pipe joint.

Abstract: A coupling system including a coupling for fastening to one end of a pipe via a fastening connection; and a sleeve surrounding the fastening connection is disclosed. The sleeve includes a first end for welding to the pipe, and a hook-forming second end for co-operating with the coupling in such a manner that the hook is suitable for providing fastening between the coupling and the pipe in the event of the fastening connection being damaged.

Abstract: The invention involves an electrofusion pipe fitting. The fitting has a body having a pipe-receiving aperture. An electric heating element surrounds the aperture. The fitting has a thermochromic indicator at an axial end.

Abstract: A moulded electrofusion fitting (10) for connection to a plastics pipeline, comprises a hollow body (16) formed with a tubular opening that has a longitudinal axis (82) and is adapted to receive an end of the pipeline as a close sliding fit. An electrofusion element (22) is formed in the internal surface (52c) in the opening, spaced from its end (52b). Fingers (52) are on the end of the opening, circumferentially spaced around the opening and separated by slots (53) between them. Cam surfaces in the form of ribs (60) are defined on the fingers, and a grip ring (50) is received on the fingers and includes wedge elements in the form of grooves (62). These are adapted to fit the ribs so that, when a pipeline is inserted in the opening and the grip ring is rotated about said axis, the ribs and grooves engage to press the fingers radially inwardly against the reaction of the grip ring whereby, said pipe is gripped by said grip ring and centralised in the opening.

Abstract: The present invention is directed to a pipe section and a connector that are adapted to be welded together, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land. In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land. In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.

Abstract: The present invention is directed to a pipe section (220) and a connector (400) that are adapted to be welded together, wherein each of the pipe and connector have inner and outer beveled surfaces and the joint is comprised of an angular alignment land (60). In one embodiment, an outer beveled surface on the pipe and an inner beveled surface on the connector cooperate to define the angular alignment land (60). In yet another illustrative embodiment, the inner beveled surface of the connector and the outer beveled surface of the pipe have a bevel angle of approximately 30 degrees, while the outer beveled surface of the connector and the inner beveled surface of the pipe have a beveled angle of approximately 45 degrees.

Abstract: A plastic coupling for joining two metal pipe sections end-to-end to form a pipe assembly. A first plastic spigot cuff is formed along the periphery of the end of the first pipe and a mating second plastic bell cuff is formed along the periphery of the end of the second pipe, such that the first and second cuffs form a bell and spigot joint with the first, spigot cuff inserted into and joined to the second, bell cuff.

Abstract: In a joint structure for coupling a first component (21) to a second component (22) in a joint portion of a fluid flow passage, the second component (22) has a portion thereof inserted into the first component (21) to engage with the first component (21). The second component (22) is provided with a flange portion (26), which is disposed adjacent to a bottom surface of the first component (21) and welded or bonded to the bottom surface, so that these components (22, 21) are coupled with each other in an easy and a fluid-tight manner in a condition in which they are prevented from rotating relative to each other without using any locking pin. There is no fear that the components (22, 21) dissolve in a fluid or gaseous material passing through the fluid flow passage. The joint structure is easy in maintenance.

Abstract: A method of welding together the ends of outer pipe sections (16A, 16B) of pipe-in-pipe pipeline to be laid on a seabed employs an annular member (5) interposed between adjacent lengths of pipe. The annular member comprises a first axial part (11) which fits within the end of the first outer pipe section, and a flange part (12) which is interposed between the adjacent ends of the two lengths of outer pipe sections (16A, 16B) to be joined. The flange part (12) of the annular member (5) projects radially outwardly beyond the inside of the outer pipe sections (16A, 16B) and terminates radially inwardly of the outside of the outer pipe sections (16A, 16B), and provides some of the welding material for the joint.

Abstract: A structure and a method for coupling a protective net to a flexible tube, comprising shaping the flexible tube, wrapping the flexible tube with the meshed protective net made of stainless steel, and welding both ends of the flexible tube to both ends of the protective net. A solution heating process for the flexible tube and welding process for the flexible tube and the protective net are simultaneously carried out under the same condition in the same furnace. As a result, the protective net and the flexible tube are uniform in terms of physical properties. Furthermore, intergranular corrosion of stainless steel by inevitable stress generated upon welding a flexible tube and a protective net using any one of conventional methods, and crevice corrosion between a welding ring and a flexible tube, are prevented.

Abstract: A weldable plastic tube has at least one end designed to be butt welded and designed for the conveyance of a fluid producing a drop in mechanical resistance of the weldable plastic. The tube includes an internal layer for protection of the plastic of the tube from contact with the fluid conveyed and adjoining the welding end has a terminal section permanently covered with an external reinforcing sleeve also of weldable plastic to participate in the butt welding of the tube. The sleeve has a thickness such as to make the mechanical resistance of the tube section nearest the welded end at least equal to the mechanical resistance of the tube not in contact with the fluid when in contact with the fluid in the welding zone which will be without the internal protective layer.

Abstract: Disclosed is a connection stub and a housing, in particular a high-pressure fuel reservoir, for a fuel injection system for internal combustion engines with a welded connection stub, in which sealing faces between the housing and the connection stub are provided, spatially separately from the weld seam.

Abstract: A fuel injector assembly with fluid communication cut-outs is disclosed which includes a method of forming a fuel injector that allows weld integrity evaluation between a shell and a body of the fuel injector, the fuel injector having a fuel inlet, a fuel outlet, a fuel passageway extending from the fuel inlet to the fuel outlet along a longitudinal axis, the body having an exterior surface, and the shell having an interior surface, the method including the steps of securing the shell to the exterior surface of the body, and cincturing the exterior surface of the body with the interior surface of the shell such that fluid communicates between the exterior surface of the body and the fuel passageway for particular weld integrities.