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RESEARCH PAPERS

Design Procedure for Flexibility Factors of 90-Deg Curved Pipe Having Various Tangent Lengths (Design Paper)

[+] Author and Article Information
D. J. Nordham

Machinery Research and Development Directorate, Naval Surface Warfare Center, Carderock Division, Annapolis, MD 21402-5067

L. M. Kaldor

Arnold, MD 21012

J. Pressure Vessel Technol 115(3), 319-324 (Aug 01, 1993) (6 pages) doi:10.1115/1.2929534 History: Received September 28, 1992; Revised April 26, 1993; Online June 17, 2008

Abstract

A simple design procedure, based on 175 finite element analyses, was derived to predict the flexibility factor due to an in-plane or out-of-plane moment for a 90-deg curved pipe with end constraints composed of tangents of any length terminated by rigid flanges and no internal pressure loads. The results of this design procedure were then compared to flexibility factors obtained from additional finite element analyses and experimental work. Flexibility factors calculated using the design equations in the Power Piping Code (ANSI/ASME B31.1-1986) were also compared to all finite element and experimental work. It was found that this design procedure more accurately predicts the flexibility factors than the Power Piping Code.

Copyright © 1993 by The American Society of Mechanical Engineers
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