This paper presents the results of experimental and finite element analysis (FEA) studies focused on the tensile strain capacity of X80 pipelines under large axial loading with high internal pressure. Full-pipe tensile test of girth welded joint was performed using high-strain X80 linepipes. Curved wide plate (CWP) tests were also conducted to verify the strain capacity under a condition of no internal pressure. The influence of internal pressure was clearly observed in the strain capacity. Critical tensile strain is reduced drastically due to the increased crack driving force under high internal pressure. In addition, SENT tests with shallow notch specimens were conducted in order to obtain a tearing resistance curve for the simulated HAZ of X80 material. Crack driving force curves were obtained by a series of FEA, and the critical global strain of pressurized pipes was predicted to verify the strain capacity of X80 welded linepipes with surface defects. Predicted strain showed good agreement with the experimental results.
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2010 8th International Pipeline Conference
September 27–October 1, 2010
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4423-6
PROCEEDINGS PAPER
Tensile Strain Capacity of X80 Pipeline Under Tensile Loading With Internal Pressure
Satoshi Igi,
Satoshi Igi
JFE Steel Corporation, Chiba, Japan
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Takahiro Sakimoto,
Takahiro Sakimoto
JFE Steel Corporation, Chiba, Japan
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Nobuhisa Suzuki,
Nobuhisa Suzuki
JFE Steel Corporation, Kawasaki, Japan
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Ryuji Muraoka,
Ryuji Muraoka
JFE Steel Corporation, Fukuyama, Japan
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Takekazu Arakawa
Takekazu Arakawa
JFE Steel Corporation, Tokyo, Japan
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Satoshi Igi
JFE Steel Corporation, Chiba, Japan
Takahiro Sakimoto
JFE Steel Corporation, Chiba, Japan
Nobuhisa Suzuki
JFE Steel Corporation, Kawasaki, Japan
Ryuji Muraoka
JFE Steel Corporation, Fukuyama, Japan
Takekazu Arakawa
JFE Steel Corporation, Tokyo, Japan
Paper No:
IPC2010-31281, pp. 91-100; 10 pages
Published Online:
April 4, 2011
Citation
Igi, S, Sakimoto, T, Suzuki, N, Muraoka, R, & Arakawa, T. "Tensile Strain Capacity of X80 Pipeline Under Tensile Loading With Internal Pressure." Proceedings of the 2010 8th International Pipeline Conference. 2010 8th International Pipeline Conference, Volume 4. Calgary, Alberta, Canada. September 27–October 1, 2010. pp. 91-100. ASME. https://doi.org/10.1115/IPC2010-31281
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