0
RESEARCH PAPERS

The Effect of Induction Heating Stress Remedies on Existing Flaws in Pipes

[+] Author and Article Information
J. R. Shadley, N. Merah, E. F. Rybicki

Department of Mechanical Engineering, University of Tulsa, Tulsa, Okla. 74104

J. Pressure Vessel Technol 104(3), 193-197 (Aug 01, 1982) (5 pages) doi:10.1115/1.3264203 History: Received April 02, 1982; Online November 05, 2009

Abstract

One method for reducing stress corrosion cracking problems called induction Heating for Stress Improvement (IHSI) has been successful in producing compressive residual stresses on the inside surface of welded pipes. During the time that the induction heating coil is turned on, however, the process causes tensile stresses at the inner wall, raising questions about the effect that the induced tensile stress field may have on existing flaws in the pipe. To provide a basis for comparing as-welded stress distributions with the stress distributions occurring during the IHSI process, stress intensity factors were computed for part-through, axisymmetric, circumferential cracks in pipes using linear elastic fracture mechanics analyses. Results for as-welded stress distributions agree with the field experience that most of the crack pipes in Boiling Water Reactor piping systems are smaller diameter pipes in the 4–12-in. (102–305-mm) range. Stress intensity factors in the smaller diameter pipes for the stresses during IHSI were comparable to those for the as-welded stresses. For the 26-in- (660-mm-) dia pipe, the large changes in the stress distributions during the IHSI process suggest the possibility of a net closing or opening of a flaw existing in the pipe prior to the heat treatment.

Copyright © 1982 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In