A pipeline’s resistance to collapse is governed by geometric imperfections, material properties and residual stresses. The offshore pipeline design code DNV-OS-F101 provides a method for predicting collapse of pipelines with diameter to wall thickness (D/t) ratios between 15 and 45. This paper examined the various factors that could influence the collapse resistance of several pipe geometries, such as ovality, eccentricity, material stress-strain behavior and residual stresses in the hoop and longitudinal directions. A total of 132 cases were carried out, using 2D and 3D Nonlinear Finite Element Analysis, to predict the collapse pressure of several realistic pipe geometries. Results of this study suggest that the DNV-OS-F101 predictions are conservative and applicable for a wide range of D/t ratios. While there is close correlation between Finite Element prediction and DNV-OS-F101 prediction, there is a degree of conservatism at low D/t ratios using DNV-OS-F101 equations. Hence there would be scope for further optimization of pipe wall thickness design against the collapse limit state at low D/t ratios.
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ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering
June 8–13, 2014
San Francisco, California, USA
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4546-2
PROCEEDINGS PAPER
Predicting Hydrostatic Collapse of Pipes Using Finite Element Analysis
Ali Mirzaee-Sisan,
Ali Mirzaee-Sisan
Det Norske Veritas, London, UK
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James Njuguna
James Njuguna
Robert Gordon University, Aberdeen, UK
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Ajit Bastola
Det Norske Veritas, London, UK
Junkan Wang
Det Norske Veritas, London, UK
Ali Mirzaee-Sisan
Det Norske Veritas, London, UK
James Njuguna
Robert Gordon University, Aberdeen, UK
Paper No:
OMAE2014-23690, V06AT04A048; 9 pages
Published Online:
October 1, 2014
Citation
Bastola, A, Wang, J, Mirzaee-Sisan, A, & Njuguna, J. "Predicting Hydrostatic Collapse of Pipes Using Finite Element Analysis." Proceedings of the ASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering. Volume 6A: Pipeline and Riser Technology. San Francisco, California, USA. June 8–13, 2014. V06AT04A048. ASME. https://doi.org/10.1115/OMAE2014-23690
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