Stability of Vertically Bent Pipelines Buried in Sand
J. Pressure Vessel Technol. -- August 2004 -- Volume 126,
Issue 3, 382 (9 pages)
DOI:10.1115/1.1767858
This paper discusses the stability of underground
pipelines with preformed vertical bends buried in sandy soil. More
specifically, the minimum cover height required to prevent the pipe
from bowing under the action of forces due to temperature change and
internal pressure is estimated. The variables considered include the
pipe and soil materials, diameter, thickness, overburden height, bend
radius, bend angle, internal pressure, fluid specific weight, and
temperature variation. A comprehensive three-dimensional finite
element analysis is carried out. The results are extracted from the
output obtained. These results are put in a database which is used to
develop general regression models to determine the relationships
among the different variables. Different buckling modes are also
considered. All of these results and models are entered into a
computer software program for ready access.
©2004 ASME
History: | Received May 10, 2002; revised February 16, 2004 | |
DOI: | http://dx.doi.org/10.1115/1.1767858 |
KEYWORDS and PACS
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