METHOD OF PROTECTION OF THE INTERNAL ZONE OF CONNECTIONS OF THE REPAIR NOZZLE WITH THE END OF AN EMERGENCY SECTOR OF THE PIPELINE WITH AN INTERNAL COATING Russian patent published in 2019 - IPC F16L58/18 F16L13/02 

FIELD: transportation.

SUBSTANCE: invention relates to the field of pipeline transport and can be used in the construction and repair of pipelines for various purposes, transporting aggressive media. Method includes installation of a repair branch pipe on the cut-out emergency section of the pipeline, at the ends of which there are bushings having sealing elements at the ends, partial insertion of bushings by axial displacement at the ends of the emergency pipeline section using lateral projections moving in longitudinal slots made at the ends of the branch pipe, sealing of the corresponding joints and through slots, connection of the joints and sealing of the side slots with fixation of the bushings against axial displacement. Bushings are equipped at the ends with extensions, between which and the sealing elements the two pushers are installed, moreover, the lateral protrusions are connected to one of the pushers of the protective sleeve, after the bushings have been partially inserted into the ends of the emergency pipeline section, the pushers without protrusions are fixed relative to the nozzle or pipeline, the protrusions with another pusher move from the fixed pusher to the shear of the sealing elements on the expansion with sealing spaces between the end of the pipeline and the protective sleeve and between the pipe and the protective sleeve.

EFFECT: proposed method provides reliable anticorrosion protection of the connection of the repair pipe with a repaired pipeline that has an internal coating without axial displacement of the connected ends.

1 cl, 4 dwg