REPAIR PIPELINE CONNECTION FROM POLYMER PIPES Russian patent published in 2020 - IPC F16L21/00 

FIELD: pipelines.

SUBSTANCE: invention relates to connections for polymer pipes. In the repair connection, the coupling ends of the pipes are fitted with coupling nuts with internal thread and collet. At that nut end is made with cone, and collets are made with mating cone and oblique longitudinal cut. An insert of brass with a protective coating, on which nipples are pre-fitted, and an insert end is made on one side of the insert, is installed in the internal part of the connected pipes. Outer diameter of nipple has thread, and inner end is made with cone, on inner diameter of nipple there are at least two annular grooves, in which sealing rings are installed. On outer diameter of insert there are at least two annular grooves on each side, in which sealing rings are installed. When repair connection is used it is necessary to install insert with side with stop to one of ends of connected pipes to the stop and to screw nut on nipple, at that conical end faces of nut and nipple are pressed to collet. Collet, squeezed, is reliably fixed at the pipe end and additionally squeezes sealing rings. Then the insert second end is installed, reliably fixes and seals the pipe.

EFFECT: invention can be used in installation of pipelines of heating systems, cold and hot water supply, as well as during repair and replacement of damaged sections of pipelines of above systems in hard-to-reach places.

1 cl, 1 dwg