UNION FOR PIPELINE CONNECTION Russian patent published in 2010 - IPC F16L21/02 

FIELD: machine building.

SUBSTANCE: union for pipelines connection consists of case, end sections of which have external thread and internal borings. A circular stop ledge is made on internal surface of the case; the ledge rests against the end of an enveloping pipeline arranged on an enveloped pipeline. A packing collar constricted with a threaded cover is installed in one of the internal borings of the case on the side of the enveloped pipeline. The stop hold-down bushing is arranged between the cover and the packing collar. A rubber ring with a spacer constricted with a captive nut is installed in another internal boring of the case. A collar of a ferrule is located between the bearing flange of the spacer and the end of the captive nut; cross section of the ferrule diminishes as it goes aside from the case. Length of internal surface of the case up to the stop circular ledge on the side of the enveloped pipeline is bigger, than length of internal surface of the case on another side from the stop circular ledge.

EFFECT: increased reliability of connection.

1 dwg