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Material Issues in Ageing and Life Extension

[+] Author Affiliations
Erik Hörnlund, Gerhard Ersdal, Rolf H. Hinderaker

Petroleum Safety Authority Norway, Stavanger, Norway

Roy Johnsen

Norwegian University of Science and Technology, Trondheim, Norway

John Sharp

Cranfield University, Cranfield, UK

Paper No. OMAE2011-49363, pp. 261-267; 7 pages
  • ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 3: Materials Technology; Jan Vugts Symposium on Design Methodology of Offshore Structures; Jo Pinkster Symposium on Second Order Wave Drift Forces on Floating Structures; Johan Wichers Symposium on Mooring of Floating Structures in Waves
  • Rotterdam, The Netherlands, June 19–24, 2011
  • ISBN: 978-0-7918-4435-9
  • Copyright © 2011 by ASME and Government of Norway


A considerable number of the structures in the Norwegian part of the North Sea have passed or are close to their design life. Material degradation will play an important role in the ageing of these structures and the evaluation of their safety. An overview of research work initiated by the Petroleum Safety Authority (PSA) is presented. The paper focuses on various material aspects of ageing related to offshore facilities, the risks they represent to the integrity of a facility and how to deal with them in a life extension process. The paper presents and discusses expectations towards the industry with respect to evaluation of ageing materials in life extension.

Copyright © 2011 by ASME and Government of Norway
Topics: Life extension



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