PROCEDURE FOR APPLICATION OF COATING ON INTERNAL SURFACE OF PIPELINE Russian patent published in 2011 - IPC F16L58/02 

FIELD: machine building.

SUBSTANCE: before insertion of sleeve inside pipe bandage of fibrous material is fixed on internal surface of pipe by means of metal band impregnated with solidificated binding. There is formed an open circular section of the bandage. A tube-like sleeve of fibrous material is inserted inside the pipe. The sleeve is impregnated with solidificated binding and is enclosed into a flexible casing of polymer material. Further, the sleeve is reversed and moved inside the pipe, is straightened and pressed to internal surface of the pipe due to pressure of water on internal surface of an inverted sleeve. The bandage is solidificated simultaneously with the sleeve.

EFFECT: reduced amount of air in space between internal surface of pipe and sleeve inserted into pipe; elimination of working fluid leakage between internal surface of pipe and external surface of solidificated sleeve coating.

4 dwg