PIPE CONNECTION (VERSIONS) Russian patent published in 2011 - IPC F16L15/00 

FIELD: construction.

SUBSTANCE: pipe connection comprises a nozzle with an external thread section and a cap nut screwed to the external thread section of the nozzle, and also there is an external enveloping cylindrical section and an inserted cylindrical section, which retain the end section of the connected pipe subject to elastic deformation inside and outside. A C-shaped stop ring is installed into the connection, which has a gap at the periphery and is arranged in the cone area of the section with a hole for insertion of a cap nut. The stop ring has a retaining enveloping section arranged at the inner peripheral surface and the peripheral surface of the stop ring. At the same time the rotary element is located in the retaining enveloping section with the possibility of rotation and touches the cone section, a section with a hole for insertion of a cap nut, forming a circumferential concave groove by means of elastic deformation at the peripheral surface of the pipe, and by means of deformation it transforms the end section of the pipe into the cone section with increasing diametre.

EFFECT: invention increases reliability of pipe connection.