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RESEARCH PAPERS

Reliability Factors and Tightness of Tube-to-Tubesheet Joints

[+] Author and Article Information
Z. F. Sang, Y. Z. Zhu

Department of Mechanical Engineering, Nanjing Institute of Chemical Technology, Nanjing, People’s Republic of China

G. E. O. Widera

Department of Mechanical and Industrial Engineering, Marquette University, 1515 W. Wisconsin Avenue, Milwaukee, WI 53233

J. Pressure Vessel Technol 118(2), 137-141 (May 01, 1996) (5 pages) doi:10.1115/1.2842171 History: Received April 11, 1995; Revised September 20, 1995; Online February 11, 2008

Abstract

The main purpose of this paper is to provide an applicable method to establish reliability factors for expanded tube-to-tubesheet joints. The paper also reports on the results of a preliminary study to validate experimentally the reliability efficiencies listed in Table A-2 of Appendix A of Section VIII, Division 1, of the Boiler and Pressure Vessel Code (ASME, 1986), and tightness of expanded tube-tubesheet joints. A comparison between the actual reliability factors fr determined from testing the damage strength of the joint and calculated according to Appendix A-4 of the ASME Code and those of Table A-2 is carried out. The results are discussed in light of the restrictions inherent in Table A-2. It is confirmed that some existing values of fr are conservative, while others are less so.

Copyright © 1996 by The American Society of Mechanical Engineers
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