METHOD TO REPAIR PIPELINES AND OTHER METAL STRUCTURES Russian patent published in 2014 - IPC F16L58/02 

FIELD: construction.

SUBSTANCE: method includes performance of the following operations: earth works (if necessary), removal of an old insulation coating, preparation of the surface for application of a new insulating layer and application of a new insulating structure. The section of the pipeline to be repaired is separated from the remaining thread of the pipeline. Via the soil massif the area around the pipe is saturated by reagents of chemically active or biologically active interaction at the border layer "metal - old insulation", and then earth works are performed, and the old insulating layer is removed after final damage of adhesion links of the border layer. Preparation of the surface for application of new insulation is done with full removal of remains of chemical and biological reagents.

EFFECT: reduced costs for performance of repairs of pipelines with simultaneous increase of efficiency and quality of repair operations.

2 cl, 5 dwg