A method for connecting piping includes securing a first piping portion to a base. A second piping portion is secured to a rotating portion. The second piping portion is then rotated. While the second piping portion is rotating, the second piping portion is inserted and driven through the first piping portion. A portion of the first piping portion disconnects from the remainder of the first piping portion. After this disconnection, a rotation of the second piping portion is stopped. A solid weld is formed between the first piping portion and the second piping portion.

The present invention relates to a method of coating a pipeline field joint comprising the steps of (a) applying a layer of a coating material composition comprising (i) a propylene polymer and (ii) a substantially linear ethylene copolymer, a linear ethylene copolymer, or mixtures thereof, to the uncoated region of the field joint, preferably the coating is applied by injection molding.

A method for connecting piping includes securing a first piping portion to a base. A second piping portion is secured to a rotating portion. The second piping portion is then rotated. While the second piping portion is rotating, the second piping portion is inserted and driven through the first piping portion. A portion of the first piping portion disconnects from the remainder of the first piping portion. After this disconnection, a rotation of the second piping portion is stopped. A solid weld is formed between the first piping portion and the second piping portion.

A joint structure comprising a light-absorbable member having at least one opening portion and a light-permeable member superposed on the light-absorbable member so as to cover the opening portion, wherein an annular weld part is formed so as to enclose the opening portion and join the light-absorbable member and the light-permeable member, and an area ratio of a portion at the side of the light-absorbable member to a portion at the side of the light-permeable member side is in a range of 12-35 viewing a section perpendicular to the extending direction of the annular weld part.

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.

An apparatus and process by which a leak-proof connection with a polymeric tube is described herein. Particular embodiments of the present invention include a leak-proof connection fitting inserted into a bore of a overmolded attachment piece wherein the overmolded attachment piece is overmolded onto the polymeric tube. The leak-proof connection fitting includes multiple surfaces in various configurations. The multiple surfaces include barb(s), raised surface(s), reduced surface(s), and channel(s). O-rings may be further added to the leak-proof connection fitting. In some embodiments, the overmolded attachment piece or the tube itself is secured to the fitting by shape memory.

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.

An apparatus and method for joining pipes includes a plate for melting mating surfaces of the pipes to be joined. Additionally, the apparatus utilizes a vacuum in order to push the first and second pipes together in lieu of hand or mechanical pressure which may be inconsistent. Additionally, the vacuum allows the pipes to be joined to settle on each other in order to create a pressure about a periphery of the end of the pipe being joined to the other pipe. The consistent pressure creates a very strong joint between the first and second pipes.

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.

An injection mold including a gate and a cavity, where a weld portion is formed inside the cavity by injecting molten resin containing reinforcing fibers from the gate into the cavity; a cavity surface of the injection mold has a plurality of ridge portions 140 on a downstream side in a resin flow direction of the cavity, where the ridge portions extend in a direction intersecting a weld extending direction of the weld portion and protrude into the cavity; and the plurality of ridge portions are arranged at intervals from each other in a direction intersecting the weld extending direction and are arranged at intervals from each other in the weld extending direction.