METHOD FOR PIPELINE RECONSTRUCTION Russian patent published in 2013 - IPC F16L55/165 F16L58/10 B29C63/36 

FIELD: machine building.

SUBSTANCE: pipeline is reconstructed by coating application at its internal surface. First textile shell soaked with binding agent is pulled through the cleaned pipeline with its one end fixed at the pipeline and the other end tensed. Then in the place of its fixing at the pipeline there installed is a pneumatic lock with pneumatic lip seal and with their application after preliminary passing through them and fixing on the pipeline there input is an air-proof film sleeve under air pressure with textile shell outside in with simultaneous expanding of textile shell and its pressing against pipeline wall. At the period of polymerisation the pressing is done under pressure that exceeds the pressure of ground waters in places of possible through defects of pipeline. After polymerisation film sleeve is removed.

EFFECT: simplification of trench-free technology of pipeline reconstruction and enlarging manufacturing capabilities of the method.

4 cl, 2 dwg