ELECTRO-INSULATED CONNECTION OF PIPELINES Russian patent published in 2011 - IPC F16L25/00 

FIELD: machine building.

SUBSTANCE: electro-insulated connection of pipelines consists of metal branches with ring bosses whereon there is formed fastener in form of bush out of composite material, of protective ring out of dielectric material installed between ends of branches and of packing collar out of elastomer material enveloping end sections of branches. Circular recesses are made on the end sections of the branches on their end surfaces; behind the cross section of the recesses to the side of the opposite branch there are made circular projecting sections. The protective ring has a narrow section installed between the circular projecting sections and a convex section put on the circular projecting sections. The packing collar envelopes the protective ring with its internal surface; while with its external surface it contacts surface of a cavity formed with the fastener and ends of the branches. Adjacent surfaces of the projecting sections of the branches ends and the packing collar are glued.

EFFECT: increased reliability of pressure tightness of connection under low and high loads.

2 cl, 2 dwg