Structural Performance of Oil and Gas Pipe with Dent Defect
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 9, Issue 1
Abstract
Energy-transmission buried pipelines are often susceptible to externally applied concentrated loads that may cause dent defects. A dent or dent defect can be best described as a local defect in the pipe’s wall causing concentration of strains surrounding and within the dent. Additionally, a dent causes the pipe’s diameter to decrease, as well as the reduction in the line’s pressure capacity. Concentration of strains that occur as a consequence of the dent’s formation may lead to a failure such as a leak or a rupture within the pipe’s wall, and this may cause environmental and safety hazards and a loss of revenue for the pipeline operators. Therefore, dent defects are a significant concern for the oil and gas pipeline operators. This paper presents an investigation of the effect of dent length, depth of dent, and operating pressure on the structural performance, distribution of strains, and strain concentrations in oil and gas (energy) transmission pipelines.
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Acknowledgments
The authors thank the Natural Sciences and Engineering Research Council of Canada (NSERC) located Ottawa. Sincere thanks are given to other members of the Centre for Engineering Research in Pipelines (CERP) for their help.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 9 • Issue 1 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Oct 6, 2016
Accepted: Jul 13, 2017
Published online: Nov 22, 2017
Published in print: Feb 1, 2018
Discussion open until: Apr 22, 2018
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