PROCEDURE FOR FABRICATION OF CURRENT 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 external coupling connecting them. The branches are permanently connected by a coupling by means of joint expansion of branches and coupling, thus forming circular lugs on external surfaces 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 polymer coating, ends of which are secured and sealed. Also the dielectric pads between the branches and coupling are compound. In zones of external biases of at least of one of the lugs and within the range of each branch there are positioned dielectric pads out of material of low creep, while on the rest of sections there are used the dielectric pads out of plastic or elastic material.

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

5 cl, 1 dwg