PROCEDURE FOR FABRICATION OF ELECTRO-INSULATING INSERTION FOR PIPELINE Russian patent published in 2010 - IPC F16L25/03 

FIELD: machine building.

SUBSTANCE: dielectric pads are arranged between adjacent ends of two branches made out of pipeline material and between branches and connecting them external coupling. The branches are permanently connected with the coupling by means of joint radial expansion of the branches and coupling thus forming circular lugs on external surface of the branches and coupling with height exceeding thickness of the dielectric pads between the branches and the coupling. Internal surface of the branches is lined with a polymer coating ends of which are fastened and sealed by means of radial deformation of metal binding tips in them. The circular ends on external surface of the coupling and branches are formed at a certain distance from the ends of the coupling, while end sections of the coupling are reduced by means of radial squeezing and forming internal lugs in the branches.

EFFECT: raised reliability of insertion at high pressure in pipeline.

4 cl, 1 dwg