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Stress Indices of Hollow Circular Cross Section Welded Attachments on Piping Elbows with the Extended Parameters Range  

Lee, Kun-Suk (KEPCO Engineering & Construction Co., Inc.)
Moon, Seong-Jae (School of Mechanical Engineering, Hanyang University)
Publication Information
Plant Journal / v.15, no.4, 2019 , pp. 43-51 More about this Journal
Abstract
The stress concentration of the integral welded attachments (IWA) often used to support piping system has been a big issue because it induces local stresses in piping. The method to evaluate local stresses associated with attachments on elbows has been suggested in EPRI TR-107453. However, there are limitations regarding specific parameters range in order to use correlation equation. In this paper, parametric study based on piping elbow size and attachment dimension was performed utilizing finite element analysis (FEA) to evaluate the secondary stress indices of hollow circular cross section welded attachments on piping elbows with the extended parameters range. The results of the FEA were used to develop correlation formulas for calculating secondary stress indices. The empirical equations in this study are suggested as an alternative evaluation method of EPRI TR-107453 by extending parameters range.
Keywords
Stress Concentration; Local Stress; Secondary Stress Indices; Integral Welded Attachment; Finite Element Analysis;
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  • Reference
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