TPWJ, 2010, #10, 6-9 pages
OPTIMAL REDUCTION OF WORKING PRESSURE IN PIPELINES FOR WELDING REPAIR OF THINNING REGIONS
Journal The Paton Welding Journal
Publisher International Association «Welding»
ISSN 0957-798X (print)
Issue № 10, 2010 (October)
V.I. MAKHNENKO, V.S. BUT, S.S. KOZLITINA, L.I. DZYUBAK and O.I. OLEJNIK
E.O. Paton Electric Welding Institute, NASU, Kiev, Ukraine
The possibility of using welding to repair defects of corrosion origin in walls of pressurised pipelines is considered. It is shown that the safety of welding operations is affected not only by the overall size of a defect, but also by the shape of a pipe wall thinning. Calculation algorithms are applied to substantiate the possibility of repair of defects by overlaying welding due to optimal reduction of internal pressure in the main line for a period of repair.
main pipeline, welding repair, overlaying welding, sizes of defects, residual thickness of pipe wall, optimal pressure
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