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A Framework for Managing the Threat of SCC and Other Forms of Cracking in Pipelines Using In-Line Inspection Tools

[+] Author Affiliations
Sergio Limon-Tapia, David Katz

Williams Gas Pipeline West, Salt Lake City, UT

Thomas Beuker, Claus Döscher

RTRC, Lingen, Germany

Bryce Brown

ROSEN, Houston, TX

Paper No. IPC2008-64090, pp. 191-197; 7 pages
doi:10.1115/IPC2008-64090
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 phenomenon of Stress Corrosion Cracking (SCC) as a major integrity threat has been investigated intensively and discussed since the 1970’s. Based on the far-reaching understanding of this threat today, integrity management programs have been developed further in recent past. A framework approach is proposed of dividing the integrity management into a process-based structure. Within this structure the different processes from the inspection program to the control of the immediate and future integrity are arranged in a closed loop. The framework has been applied to a Williams 26-inch gas pipeline. The pipeline has been inspected with a high resolution in-line inspection tool, using electromagnetic acoustic technology (EMATs), with a sensitivity to coating disbondment and SCC, proven by detailed results obtained from pipe samples containing SCC. In preparation of an extensive in-field evaluation program, an engineering critical assessment and a risk based analysis of limit conditions are conducted. The results from the in-field program are used to support the subsequent process of tool performance validation and integrity control.

Copyright © 2008 by ASME

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