TUBULAR DEVICE AND METHOD Russian patent published in 2015 - IPC F16L13/02 

FIELD: machine building.

SUBSTANCE: group of inventions relates to pipe joint. The tubular device contains two pipes and coupling, at that both pipes have external metal wall and internal thermosensitive lining out of synthetic material, and also end faces looking one on another and connected by means of the coupling located beyond the pipes and welded to at least one pipe. Along the weld located at distance from the end face of the first pipe in longitudinal direction of the pipe that connects the coupling with this pipe, and in direction along the pipe circle and between the metal wall and lining the isolator is integrated. Method of the tubular device manufacturing means that there is an isolator on the internal side of the metal wall of at least one pipe at distance from its end face, that further due to the pipelining application is integrated in it; then the pipe is inserted in the coupling installed on the another lined pipe; the coupling is welded with the pipe along the isolator from external side of the pipe with its metal wall.

EFFECT: invention improves device connection reliability.

19 cl, 2 dwg