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Analysis of Weld Beads for Wall Thinning Defects in the Weld Zone of the Boost Pump Recirculation Pipe for Power Plants and Evaluation of Their Integrity  

Nam, Ki-Woo (Materials Science and Engineering, Pukyong National University)
Ahn, Seok-Hwan (Bukyong Education Center for Vehicle Safety Component Technology, Pukyong National University)
Do, Jae-Yoon (Busan Campus of Korea Polytechnic VII)
Publication Information
Journal of Ocean Engineering and Technology / v.24, no.4, 2010 , pp. 38-46 More about this Journal
Abstract
The wall thinning phenomenon of pipes was simulated as metal loss due to erosion and corrosion. Such wall thinning defects in the pipes of power plants are a very important safety consideration. In this study, we analyzed wall thinning defects that occurred by weld bead of weld zone of boost pump recirculation pipe. From the results of the analysis of pipe failures, numerical analysis was performed by Fluent v6.3.26 using the standard k-$\varepsilon$ model of the weld bead shape, such as an elliptical or a spherical shape, on the inner wall of the pipe. Using the results obtained, we showed the overlap effect by cavitations corrosion and erosion-corrosion at the bottom of the wall-thinning defect.
Keywords
Wall thinning defect; Boost pump recirculation pipe; Erosion/Corrosion; Integrity evaluation; Weld bead; Flow analysis;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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