Modified Approach for Predicting the Remaining Strength of High-Strength Gouged Pipelines
Publication: Journal of Pipeline Systems Engineering and Practice
Volume 12, Issue 1
Abstract
With the increasing application of high-strength carbon steel pipes in oil and gas transport pipelines, a precise evaluation of such pipelines is of the utmost importance for the optimum and safe utilization of oil and gas resources. Gouge defects caused by external factors are among the major factors in reducing the strength of pipelines. Therefore, an accurate evaluation of gouged pipes is highly important for pipeline integrity management. This study used a semiempirical method to predict burst pressure in high-strength gouged pipelines. To this end, the nonlinear finite-element method was used to evaluate the effect of various factors, including material properties, strain hardening exponents, and pipe and gouge defect geometry on the remaining strength of high-strength carbon steel pipelines. Finally, a formula was provided to predict the remaining strength and burst pressure of the gouged pipelines. In order to validate the formula, full-scale burst pressure tests were used. The results of the predicted burst pressure using the developed formula were shown to be close to those of practical experiments and had a good correlation with the actual burst pressure.
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Data Availability Statement
Some or all data, models, or code generated or used during the study are available from the corresponding author by request, which include the finite-element analysis and the nonlinear regression SPSS file.
Acknowledgments
The research was supported by the National Iranian South Oil Company (NISOC) through Project No. 97-KD-1328. The authors gratefully thank the financial and technical support of NISOC and its experts.
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Published In
Journal of Pipeline Systems Engineering and Practice
Volume 12 • Issue 1 • February 2021
Copyright
© 2020 American Society of Civil Engineers.
History
Received: Apr 2, 2020
Accepted: Jun 11, 2020
Published online: Sep 16, 2020
Published in print: Feb 1, 2021
Discussion open until: Feb 16, 2021
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