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Integrity Assessment of Damaged Flexible Pipe Cross-Sections

[+] Author Affiliations
Guomin Ji, Frank Klæbo, Dag Fergestad

MARINTEK, Trondheim, Norway

Bernt J. Leira, Svein Sævik

Norwegian University of Science and Technology, Trondheim, Norway

Gunnar Axelsson

4Subsea, Hvalstad, Norway

Paper No. OMAE2014-24155, pp. V06BT04A020; 12 pages
doi:10.1115/OMAE2014-24155
From:
  • ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 6B: Pipeline and Riser Technology
  • San Francisco, California, USA, June 8–13, 2014
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4547-9
  • Copyright © 2014 by ASME

abstract

This paper presents results from a case study performed to evaluate the residual capacity of a 6″ flexible pipe when exposed to corrosion damages in the tensile armour. A three-dimensional nonlinear finite element model was developed using the computer code MARC to evaluate the increase in mean and dynamic stresses for a given number of damaged inner tensile armor wires. The study also includes the effect of these damages with respect to the associated stresses in the pressure spiral. Furthermore, the implications of a sequence of wire failures with respect to the accumulated time until cross-section failure in a probabilistic sense are addressed.

Copyright © 2014 by ASME

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