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Prediction of the Failure Pressure of Corroded Pipelines Subjected to a Longitudinal Compressive Force Superimposed to the Pressure Loading

[+] Author Affiliations
Adilson C. Benjamin

Petrobras R&D Center, Rio de Janeiro, RJ, Brazil

Paper No. IPC2008-64089, pp. 179-189; 11 pages
doi:10.1115/IPC2008-64089
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

Several methods for the assessment of corroded pipelines subjected to internal pressure loading are currently available, for example, the ASME B31G method, the RSTRENG 0.85dL method, the DNV RP-F101 method for single defects (Part B) and the RPA method. These methods do not take into account the effect of a longitudinal compressive force on the corroded pipeline failure pressure. When the corroded pipeline is subjected to a longitudinal compressive force superimposed to the pressure loading its failure pressure may be reduced. For a buried pipeline the most common source of a longitudinal compressive force is a temperature loading. A ground movement may also produce a longitudinal compressive force in the pipeline. In this paper a new method, named RPA-PLLC, is developed. This method is a modified version of the RPA method and can take into account the effect of a longitudinal compressive force on the corroded pipeline failure pressure.

Copyright © 2008 by ASME

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