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ASME Section III Stress Analysis of a Heat Exchanger Tubesheet With a Misdrilled Hole and Irregular or Thin Ligaments

[+] Author Affiliations
Enrique Gomez, Roberto Ruiz

ENSA, Maliano, Cantabria, Spain

Robert M. (Con) Wilson

Private Consultant, Orlando, FL

Paper No. PVP2013-97075, pp. V003T03A100; 8 pages
  • ASME 2013 Pressure Vessels and Piping Conference
  • Volume 3: Design and Analysis
  • Paris, France, July 14–18, 2013
  • Conference Sponsors: Pressure Vessels and Piping Division, Nondestructive Evaluation Engineering Division
  • ISBN: 978-0-7918-5567-6
  • Copyright © 2013 by ASME


A stress analysis is described for a nuclear steam generator tubesheet with a thin or irregular ligament associated with a mis-drilled hole using the rules of ASME B&PV Section III and Non-Mandatory Appendix A, Article A-8000 for Stresses in Perforated Flat Plates. The analysis demonstrates the proper application of the NB-3200 rules for this special application with discussion of the differences between an actual tube hole deviation from what is assumed in ASME Appendix A. This is a companion paper to “Technical Justification Supporting Operation with a Tube Installed in a Mis-Drilled Hole of a Steam Generator Tubesheet”.

Copyright © 2013 by ASME



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