0

Full Content is available to subscribers

Subscribe/Learn More  >

Pipeline Free Spans: Influence of Internal Pressure

[+] Author Affiliations
Olav Fyrileiv, Olav Aamlid, Erik Andreassen

Det Norske Veritas, Ho̸vik, Norway

Paper No. OMAE2010-20628, pp. 651-658; 8 pages
doi:10.1115/OMAE2010-20628
From:
  • ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering
  • 29th International Conference on Ocean, Offshore and Arctic Engineering: Volume 5, Parts A and B
  • Shanghai, China, June 6–11, 2010
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-4913-2 | eISBN: 978-0-7918-3873-0
  • Copyright © 2010 by ASME

abstract

The trend the last decades has been to develop the offshore fields by use of Subsea templates and flowline tie-backs rather than traditional platforms and topside processing. The exploitation of new offshore fields has moved towards deep waters, rougher seabed and reservoirs with high temperatures and high pressures. As flowlines are not necessarily trenched and buried, an uneven seabed may cause significant free spans. Then, if the current and wave induced flow velocities are sufficient, the free spans may be exposed to cyclic loading and associated fatigue failure. One of the governing parameters to ensure the structural integrity of free spans is the natural frequency of the span. As such it is in many cases of vital importance to estimate a realistic value of this frequency. The natural frequency is mainly determined by the bending stiffness and the span length but also operational parameters like the internal pressure and the fluid temperature. Recently some papers have been published that claim to prove that the effect of the internal pressure is the opposite of what has been the understanding in the industry and given by various codes. This paper tries to give an overview of the effect of the internal pressure and hopefully clarify what is believed to be misinterpretations of some experimental data.

Copyright © 2010 by ASME
Topics: Pressure , Arches , Pipelines

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In