Extensive studies to develop high deformability linepipe have been conducted. In the case of linepipes laid in seismic region or permafrost field, higher resistance to buckling against large strain induced by ground movement is required. In order to improve the deformability of pipes, two different types of microstructural control technologies were proposed, based on theoretical and analytical studies on the effect of microstructural characteristics on stress-strain behavior. Grade X65 to X100 linepipes with ferrite-bainite microstructure were manufactured by optimizing the microstructural characteristics. Grade X80 linepipe with bainitic microstructure containing dispersed fine MA constituents was also developed by applying new conceptual TMCP process. Deformability of developed linepipes with two different types of microstructure was evaluated by axial compression and bending tests, and all the developed linepipes showed superior resistance to buckling comparing with conventional pipes. Plate manufacturing technologies for producing recent high strength linepipe steel and the concept for microstructure control for improving deformability were also introduced in this paper.
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2006 International Pipeline Conference
September 25–29, 2006
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
0-7918-4263-0
PROCEEDINGS PAPER
Design Concept and Production of High Deformability Linepipe
Nobuyuki Ishikawa
,
Nobuyuki Ishikawa
Steel Research Center, JFE Steel Corporation, Fukuyama, Japan
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Mitsuhiro Okatsu
,
Mitsuhiro Okatsu
Steel Research Center, JFE Steel Corporation, Fukuyama, Japan
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Shigeru Endo
,
Shigeru Endo
Steel Research Center, JFE Steel Corporation, Fukuyama, Japan
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Joe Kondo
Joe Kondo
West Japan Works, JFE Steel Corporation, Fukuyama, Japan
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Nobuyuki Ishikawa
Steel Research Center, JFE Steel Corporation, Fukuyama, Japan
Mitsuhiro Okatsu
Steel Research Center, JFE Steel Corporation, Fukuyama, Japan
Shigeru Endo
Steel Research Center, JFE Steel Corporation, Fukuyama, Japan
Joe Kondo
West Japan Works, JFE Steel Corporation, Fukuyama, Japan
Paper No:
IPC2006-10240, pp. 215-222; 8 pages
Published Online:
October 2, 2008
Citation
Ishikawa, N, Okatsu, M, Endo, S, & Kondo, J. "Design Concept and Production of High Deformability Linepipe." Proceedings of the 2006 International Pipeline Conference. Volume 3: Materials and Joining; Pipeline Automation and Measurement; Risk and Reliability, Parts A and B. Calgary, Alberta, Canada. September 25–29, 2006. pp. 215-222. ASME. https://doi.org/10.1115/IPC2006-10240
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