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Corrosion Assessment Method Validation for High-Grade Line Pipe

[+] Author Affiliations
Michael Besel, Steffen Zimmermann

Salzgitter Mannesmann Forschung GmbH, Duisburg, Germany

Christoph Kalwa, Theo Köppe, Andreas Liessem

Europipe GmbH, Mülheim a. d. Ruhr, Germany

Paper No. IPC2010-31664, pp. 385-394; 10 pages
doi:10.1115/IPC2010-31664
From:
  • 2010 8th International Pipeline Conference
  • 2010 8th International Pipeline Conference, Volume 4
  • Calgary, Alberta, Canada, September 27–October 1, 2010
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4423-6 | eISBN: 978-0-7918-3885-3
  • Copyright © 2010 by ASME

abstract

The present paper deals with the pressure containment and deformation capacity of corroded high-grade steel line pipe. Firstly, some well established models are investigated concerning their predictive accuracy if applied to high-grade line pipe steel. In particular, it will be shown that all models under consideration tend to overestimate the remaining strength in the case of high-grade steel pipes. Afterwards, FE-analyses are performed in order to study the local evolution of plastic flow in the area of the corrosion defect; at the same time, the burst pressure is predicted applying von Mises plasticity and a simple failure criterion. Although different defect geometries are associated with well pronounced differences in the evolution of the plastic flow around the corrosion defect no significant effect on the burst pressure is found. Finally, the main results of a hydrostatic burst test performed on a pristine X100 line pipe joint are presented. It appears that the material under consideration seems to have anisotropic plastic material properties which may have effect on burst pressure.

Copyright © 2010 by ASME
Topics: Corrosion , Pipes

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