The fracture arrest of high pressure gas pipelines is one of the keen subjects for application of high strength line pipes. To examine the arrestability of high strength line pipes against crack propagation, several full scale fracture propagation tests have been conducted. The fracture propagation tests of X100 or X120 under high pressure revealed that the existing models of arrest energy prediction failed to predict the arrest energies. By careful investigations of the test results, it is found that the failure in prediction is mainly due to the uncertainty of crack velocity curve prediction. On the other hand, accuracy of predicted gas decompression curve is relatively high even in the case of high pressure condition. Experimentally, the arrest energies have been determined by full-scale fracture propagation tests with increasing toughness arrangement. Different from actual pipeline, extremely low toughness pipe has been employed in crack initiation pipe with intention of getting steady state propagation. However, arrestability of pipe might be underestimated in the increasing toughness arrangement test as the initial crack velocity increases. Together with recalibrated crack velocity curve, Sumitomo model (HLP method with Sumitomo’s crack velocity curve) predicts that even toughness arrangement, which is the case of real pipelines, could arrest the propagating shear fracture in high pressure gas pipelines by X100.
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2008 7th International Pipeline Conference
September 29–October 3, 2008
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4859-3
PROCEEDINGS PAPER
Fracture Propagation and Arrest in High-Pressure Gas Transmission Pipeline by Ultra High Strength Line Pipes Available to Purchase
Hiroyuki Makino,
Hiroyuki Makino
Sumitomo Metal Industries Ltd., Amagasaki, Hyogo, Japan
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Izumi Takeuchi,
Izumi Takeuchi
Sumitomo Metal Industries Ltd., Tokyo, Japan
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Ryouta Higuchi
Ryouta Higuchi
Sumitomo Metal Industries Ltd., Amagasaki, Hyogo, Japan
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Hiroyuki Makino
Sumitomo Metal Industries Ltd., Amagasaki, Hyogo, Japan
Izumi Takeuchi
Sumitomo Metal Industries Ltd., Tokyo, Japan
Ryouta Higuchi
Sumitomo Metal Industries Ltd., Amagasaki, Hyogo, Japan
Paper No:
IPC2008-64078, pp. 39-48; 10 pages
Published Online:
June 29, 2009
Citation
Makino, H, Takeuchi, I, & Higuchi, R. "Fracture Propagation and Arrest in High-Pressure Gas Transmission Pipeline by Ultra High Strength Line Pipes." Proceedings of the 2008 7th International Pipeline Conference. 2008 7th International Pipeline Conference, Volume 3. Calgary, Alberta, Canada. September 29–October 3, 2008. pp. 39-48. ASME. https://doi.org/10.1115/IPC2008-64078
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