METHOD FOR INSTALLING A PROTECTIVE COATING FOR A BUTT JOINT OF PIPES WITH A CONTINUOUS CONCRETE COATING AND A COVERING CASING Russian patent published in 2023 - IPC F16L13/00 F16L57/00 

FIELD: pipeline systems.

SUBSTANCE: protection of pipeline joints of conductive pipes with external concrete coating. To implement the method proposed in the invention for installing a protective coating for a butt joint of pipes with a continuous concrete coating, a covering casing 1 is made from a shell into which the concrete of the protective concrete coating is injected during the manufacture of pipes. At the construction site of the pipeline, before welding the joint of the conductive pipes 6, one of them is put on a covering casing 1 and shifted along the pipe. After the welding of the conductive pipes 6 is completed, the covering casing 1 is pushed over the joint area. On the side of the cover casing 1, free from the connection plate 3, and in the connection plate 3 itself, holes are made, the second side of the cover casing 1 is riveted. After that, the surface of the assembled covering casing 1 is aligned with the surface of the shells 7 of the continuous concrete covering 8 of the pipes to be joined. Places 9 butt joints are sealed with tape material, and they are put on special tightening tapes 10. After that, the joint is filled with pre-prepared hardening material 5. Filling is carried out until hardening material 5 appears from the air outlet 4, the installation of the joint is completed.

EFFECT: creating a protective coating under highway conditions without the formation of any protrusions with minimal time and material costs.

4 cl, 6 dwg