METHOD OF PIPELINE REPAIR WITHOUT DECOMMISSIONING Russian patent published in 2019 - IPC F16L55/17 F16L57/02 

FIELD: valve industry.

SUBSTANCE: invention relates to construction and repair of metal pressure pipelines without decommissioning, and can be used in repair and reconstruction of reservoirs, boilers and high pressure vessels. Proposed method comprises determination of pipeline damaged section, removal of insulation coating and cleaning of repair zone. To recover strength and stiffness of damaged section of pipeline 1, split steel coupling 2 is used, inner diameter of which is equal to outer diameter of pipeline. Parts of the coupling are installed on the outer surface of the pipeline and connected. Sections of outer surface of coupling 3 are heated to temperature of plastic deformation and after cooling there applied is sealing compound in zones of coupling ends.

EFFECT: improvement of repair quality due to possibility of restoration of carrying capacity of pipeline by recovery of strength and rigidity of pipeline on damaged section to level close to level of defect-free design in various conditions of repair and operation, and also reduction of labor intensity of repair works.

1 cl, 1 dwg