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Non-Contacting Bi-Axial Strain Measurement Method on Steel Pipeline

[+] Author Affiliations
Stephen Westwood

BJ Pipeline Inspection Services, Calgary, Alberta, Canada

Michael Martens, Richard Kania

TransCanada PipeLines Limited, Calgary, Alberta, Canada

David Topp, Raymond Karé

TSC Inspection Systems, Milton Keynes, England, UK

Mohamed R. Chebaro

C-FER Technologies, Edmonton, Alberta, Canada

Paper No. IPC2008-64093, pp. 199-203; 5 pages
doi:10.1115/IPC2008-64093
From:
  • 2008 7th International Pipeline Conference
  • 2008 7th International Pipeline Conference, Volume 2
  • Calgary, Alberta, Canada, September 29–October 3, 2008
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4858-6 | eISBN: 798-0-7918-3835-8
  • Copyright © 2008 by ASME

abstract

The StressProbe is a non-contacting electromagnetic tool that responds to material strain in ferromagnetic materials. Previous studies have concentrated on uni-axial strain measurements; in this study, we extend the scope of work by measuring bi-axial strains on a pipe specimen subject to internal pressure and to a displacement-controlled, axial tensile/compressive load. Specified pressure and load combinations were obtained, and measurements from the StressProbe were compared to those from tri-axial strain gauges installed on the pipe specimen. In this paper, we present the theory behind this measurement method and the results from this study. Also discussed are measurement applications both inside and outside the pipe specimen.

Copyright © 2008 by ASME

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