METHOD FOR DEFECTIVE PIPELINE SEGMENT REPLACEMENT Russian patent published in 2014 - IPC F16L1/24 

FIELD: transport.

SUBSTANCE: bridging pieces are installed on pipeline, which are connecting uncut pipeline pieces with each other and with defective segment. At the ends of cut out defective pipeline segment, grounded fireless pipe-cutting machines are mounted. Defective segment being cut is fixed by mean of hoisting tackle. Then, pipeline is cut simultaneously at both ends of defective segment by cutting machines with rotational speed of cutting tools not exceeding 60 rpm and with radial movement of cutting tools at speed not exceeding 30 mm/min. During pipeline cutting, wedges made of intrinsically safe material are driven into formed incisions at intervals of 250-300 mm. After that, cut out pipeline segment is dismantled using hoisting tackle, and prefabricated pipe is installed on cut out pipeline segment and ends of pipe is connected with pipeline ends by welding.

EFFECT: method simplification, higher method efficiency and safety, higher reliability of repair assembly being created.

4 cl, 1 dwg