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Validation of EMAT Technology for Gas Pipeline Crack Inspection

[+] Author Affiliations
Richard Kania, Jim Marr, Gabriela Rosca, Elvis SanJuan Riverol, Rahim Ruda

TransCanada Pipelines Ltd., Calgary, AB, Canada

Stefan Klein, Nikola Jansing, Thomas Beuker

ROSEN Innovation Center, Lingen, Germany

N. Daryl Ronsky

ROSEN Canada Ltd., Calgary, AB, Canada

Ralf Weber

ILI Consulting, Karlsruhe, Germany

Paper No. IPC2012-90240, pp. 73-77; 5 pages
  • 2012 9th International Pipeline Conference
  • Volume 2: Pipeline Integrity Management
  • Calgary, Alberta, Canada, September 24–28, 2012
  • Conference Sponsors: International Petroleum Technology Institute, Pipeline Division
  • ISBN: 978-0-7918-4513-4
  • Copyright © 2012 by ASME


The use of the Electro-Magnetic Acoustical Transducer (EMAT) technology for crack detection by In-Line Inspection (ILI) tools has increased over the last few years. Rigorous validation of the technology leading from the initial application of EMAT inline inspection tools through to determining Probability of Detection (POD) and Identification (POI) has contributed to improved confidence and reliability. EMAT results are being utilized to determine SCC valve section severity, to review and modify hydrostatic test schedules and intervals and could potentially be implemented as a viable alternative to hydrostatic testing.

This paper describes the development of an EMAT ILI based program and the related validation process applied by the vendor, pipeline operator and in-ditch personnel. This process is illustrated by demonstrating the performance of the EMAT tool in two 20″ diameter natural gas pipelines which have a documented history of SCC. The tool identified hundreds of features in the two pipelines which were validated both in the ditch and via detailed anomaly sizing.

Copyright © 2012 by ASME



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