The application of high-strength line pipes has enabled pipelines to operate at high pressure, generating cost savings for both gas transportation and construction. In general, high-strength line pipes require crack initiation resistance and crack arrestability at low temperatures, as well as field weldability. High strength and deformability for strain-based design and excellent sour resistance are also required. Moreover, composite properties are often required for high-strength line pipes. This paper describes our progress in this field with regard to metallurgical design and development. Metallurgical design aimed at achieving a good balance between strength, low temperature toughness and deformability for strain-based design is also described from the perspectives of grain refinement, microstructure and chemical composition. Metallurgical design focused on a good balance between strength and sour resistance in limited low chemical composition is described from the perspectives of microstructure and control to chemical composition and center segregation. These efforts have led to the development of high-strength heavy wall line pipes of API X60 to X100 grades offering excellent low temperature toughness and high deformability for stain-based design, while API grades X65 to X70 with good sour resistance have also been developed.
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2012 9th International Pipeline Conference
September 24–28, 2012
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute
- Pipeline Division
ISBN:
978-0-7918-4514-1
PROCEEDINGS PAPER
Metallurgical Design and Development of High-Grade Line Pipe
Takuya Hara,
Takuya Hara
Nippon Steel Corporation, Kimitsu, Chiba, Japan
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Taishi Fujishiro,
Taishi Fujishiro
Nippon Steel Corporation, Kimitsu, Chiba, Japan
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Yasuhiro Shinohara,
Yasuhiro Shinohara
Nippon Steel Corporation, Futtsu, Chiba, Japan
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Eiji Tsuru,
Eiji Tsuru
Nippon Steel Corporation, Futtsu, Chiba, Japan
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Naoki Doi,
Naoki Doi
Nippon Steel Corporation, Kimitsu, Chiba, Japan
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Eiichi Yamashita,
Eiichi Yamashita
Nippon Steel Corporation, Kimitsu, Chiba, Japan
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Hideki Miyazaki,
Hideki Miyazaki
Nippon Steel Corporation, Kimitsu, Chiba, Japan
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Hitoshi Asahi,
Hitoshi Asahi
Nippon Steel Corporation, Tokyo, Japan
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Yoshio Terada,
Yoshio Terada
Nippon Steel Corporation, Tokyo, Japan
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Masahiko Murata
Masahiko Murata
Nippon Steel Corporation, Tokyo, Japan
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Takuya Hara
Nippon Steel Corporation, Kimitsu, Chiba, Japan
Taishi Fujishiro
Nippon Steel Corporation, Kimitsu, Chiba, Japan
Yasuhiro Shinohara
Nippon Steel Corporation, Futtsu, Chiba, Japan
Eiji Tsuru
Nippon Steel Corporation, Futtsu, Chiba, Japan
Naoki Doi
Nippon Steel Corporation, Kimitsu, Chiba, Japan
Eiichi Yamashita
Nippon Steel Corporation, Kimitsu, Chiba, Japan
Hideki Miyazaki
Nippon Steel Corporation, Kimitsu, Chiba, Japan
Hitoshi Asahi
Nippon Steel Corporation, Tokyo, Japan
Yoshio Terada
Nippon Steel Corporation, Tokyo, Japan
Masahiko Murata
Nippon Steel Corporation, Tokyo, Japan
Paper No:
IPC2012-90148, pp. 149-157; 9 pages
Published Online:
July 25, 2013
Citation
Hara, T, Fujishiro, T, Shinohara, Y, Tsuru, E, Doi, N, Yamashita, E, Miyazaki, H, Asahi, H, Terada, Y, & Murata, M. "Metallurgical Design and Development of High-Grade Line Pipe." Proceedings of the 2012 9th International Pipeline Conference. Volume 3: Materials and Joining. Calgary, Alberta, Canada. September 24–28, 2012. pp. 149-157. ASME. https://doi.org/10.1115/IPC2012-90148
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