METHOD FOR REMOVING OUTER TAPE-POLYMER COATINGS OF PIPELINES Russian patent published in 2023 - IPC F16L55/18 B08B9/23 

FIELD: pipeline systems.

SUBSTANCE: construction, repair, reconstruction, improvement of pipeline systems. To implement the method, longitudinal and transverse cuts are formed at the distance of the removed section of the polymer coating. The edge of the tape is raised from the side of the longitudinal cut. The raised edge of the tape is reeved into the longitudinal section of the tube. With the help of levers inserted into the through holes at the edges of the tube, the tape is wound onto the tube. In parallel with winding, a section of the pipeline is heated in the area of the coating to be removed. The tape is wound up until the polymer coating is completely removed. The holes at the edges of the tube can be made in the same plane or in different ones. Heating of the pipeline section can be carried out using a burner or an air dryer with a working temperature of up to 500-600°C along the outer surface of the pipeline and/or a gas welding cutter along the inner surface of the pipeline. Before the cut formation, it is possible to additionally warm up the places of their execution.

EFFECT: simple, reliable and environmentally friendly method; it allows removing the outer tape-polymer coating of the pipeline with high efficiency and low labour costs.

4 cl, 7 dwg