A pipe fitting having a first body and a second body that together at least partially define a fluid flow passage. The first body defines a first portion of the fluid flow passage that extends from a first end of the fluid flow passage to a first internal opening. The second body defines a second portion of the fluid flow passage that extends from a second internal opening to a second end of the fluid flow passage. The first body has a first interface surface that surrounds the first internal opening, the first interface surface having a plurality of anti-rotation grooves. The second body has a second interface surface that surrounds the second internal opening and engages with the first interface surface. The first internal opening is in fluid communication with the second internal opening. The second interface surface has a plurality of anti-rotation fingers that are each received by and engage with a corresponding one of the anti-rotation grooves. Rotation of the second body relative to the first body is resisted by the engagement of the anti-rotation fingers with the anti-rotation grooves.

A connector for connecting a tube to a connection element. The connector includes a housing, which has a coupling portion. The coupling portion is adapted to be at least substantially fluid-tightly connectable to a complementary connection portion of the connection element. The connector includes a tube connection piece, which is adapted to be connectable on the one hand to a tube and on the other hand to the housing in order to make a fluid connection between the tube and the coupling portion of the housing. The housing includes at least one polyolefin.

A flexible coupling for transmitting torque between parts of a transmission shaft system comprises a tubular section of continuous-fibre-reinforced composite material which has been modified to form a living hinge section with reduced bending stiffness to allow flexion of the tubular section. The tubular section may be modified through the provision of a pattern of formations within the living hinge section. The formations may be in the form of apertures and/or recesses in the continuous-fibre-reinforced composite material to create a plurality of living hinges in the material between, in particular slots and/or grooves.

A machine is disclosed for coating field joints of pipeline with a coating material. The machine includes an extruder, at least one accumulator, a mold, and pipework. The extruder is configured to melt the coating material into a molten coating material, and the at least one accumulator is configured to store the molten coating material. The mold is configured to fit around the field joints and is configured to mold the molten coating material to harden about the field joints. The pipework connects the extruder to the at least one accumulator and connects the at least one accumulator to the mold. The pipework is configured to conduct the molten coating material along the pipework. At least one heater has a fluid medium and is configured to heat the fluid medium to at least one temperature setpoint. Conduit work connects the at least one heater to the pipework and is configured to conduct the heated fluid medium with the pipework to keep the coating material molten in the pipework.

A connection, and methods of making an using such a connection, the connection comprising a first layer; a second layer concentrically disposed about the first layer; and a laser-induced seal between portions of the first and second layers; wherein the laser-induced seal provides a fluid-tight engagement between the first and second layers. As to particular embodiments of the connection, the first layer can be incorporated into a first conduit and the second layer can be incorporated into a second conduit.

Disclosed are systems and methods for manufacturing compression collars for reinforcing sealed connections between a length of piping and a plumbing fitting. Specifically, compression collars and related methods of making include extruding a hollow tube having one or more ridges which are then partially removed or trimmed to provide positioning tabs on one end of the compression collar. The compression collars can be cut to the desired length from the extruded hollow tube. In this way, compression collars with features for enhancing the strength and reliability of an interference fit, as well as their ease of use, can be manufactured rapidly with little material waste through modifications to the extrusion process.

A pipe device includes a pipe and a connection element. The pipe has a pipe jacket that has an inner surface and an outer surface and forms a flow channel. The connection element forms a through-channel that extends from a connection piece consisting of a first material (M1) and having a first opening to a second opening. The pipe jacket is positioned on the connection piece with a first pipe end consisting of a second material (M2). A bonded connection is formed between the first material (M1) and the second material (M2) in a contact region between the inner surface of the pipe jacket and a peripheral surface of the connection piece.

A pipe fitting having a first body and a second body that together at least partially define a fluid flow passage. The first body defines a first portion of the fluid flow passage that extends from a first end of the fluid flow passage to a first internal opening. The second body defines a second portion of the fluid flow passage that extends from a second internal opening to a second end of the fluid flow passage. The first body has a first interface surface that surrounds the first internal opening, the first interface surface having a plurality of anti-rotation grooves. The second body has a second interface surface that surrounds the second internal opening and engages with the first interface surface. The first internal opening is in fluid communication with the second internal opening. The second interface surface has a plurality of anti-rotation fingers that are each received by and engage with a corresponding one of the anti-rotation grooves. Rotation of the second body relative to the first body is resisted by the engagement of the anti-rotation fingers with the anti-rotation grooves.

A device for axially connecting two pipe elements, including a coupling means with a first coupling means part assignable to a first pipe element, a second coupling means part and an intermediate connecting part arrangeable between the two coupling means parts, wherein a first articulation element formed on the first or second coupling means part is configured to cooperate with a second articulation element formed on the intermediate connecting part, in particular in a positive manner, forming an articulated connection between the first or second coupling means part and the intermediate connecting part, or a second articulation element formed on the first or second coupling means part is configured to cooperate with a first articulation element formed on the intermediate connecting part, forming an articulated connection between the first or second coupling means part and the intermediate connecting part.

A method and apparatus for assembling a high purity liquid distribution system is described. A distal end portion of the tube is heated then pushed over a sleeve so that the distal end portion can have a shrink seal fit over the sleeve to mitigate accidental or inadvertent pull out of the tube from a fitting. Other benefits are also achieved such as minimal flow restriction of the liquid flowing through the joint and the tube.