Development of B1 and C1 Stress Indices for Trunnion Elbow Supports

[+] Author and Article Information
D. K. Williams

Sharoden Engineering Consultants, Matthews, N.C. 28105

G. D. Lewis

Duke Power Company, Charlotte, N.C. 28242

J. Pressure Vessel Technol 106(2), 166-171 (May 01, 1984) (6 pages) doi:10.1115/1.3264324 History: Received May 19, 1983; Revised January 12, 1984; Online November 05, 2009


A finite element analysis of a trunnion elbow support is presented for the case of a long radius elbow subjected to an internal pressure loading. The stress results are categorized as average and linearly varying (through the thickness) stresses. The resulting stresses are then interpreted per Section III of the ASME Boiler and Pressure Vessel Code from which the primary and secondary (B 1 and C 1 ) pressure stress indices are developed. Several analysis were performed on various structural geometries in order to determine empirical relationships for the stress indices as a function of dimensionless ratios.

Copyright © 1984 by ASME
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