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Development and Properties of Ultra-High Strength UOE Linepipe

[+] Author Affiliations
Hitoshi Asahi, Takuya Hara, Eiji Tsuru, Hiroshi Morimoto, Masaaki Sugiyama

Nippon Steel Corporation, Futtsu, Chiba, Japan

Yoshio Terada, Masahiko Murata, Naoki Doi, Hideki Miyazaki, Tatsuya Yoshida

Nippon Steel Corporation, Kimitsu, Chiba, Japan

Naoshi Ayukawa, Hiroo Akasaki

Nippon Steel Corporation, Otemachi, Chiyoda, Japan

Paper No. IPC2004-0230, pp. 1733-1742; 10 pages
  • 2004 International Pipeline Conference
  • 2004 International Pipeline Conference, Volumes 1, 2, and 3
  • Calgary, Alberta, Canada, October 4–8, 2004
  • Conference Sponsors: International Petroleum Technology Institute
  • ISBN: 0-7918-4176-6 | eISBN: 0-7918-3737-8
  • Copyright © 2004 by ASME


High-pressure operation through high strength linepipe reduces long distance transportation cost of natural gas. In order to maximize the cost reduction, X120 UOE pipe has been developed. Low C-Mo-B steel with fine-grained lower bainite (LB) microstructure realizes high strength, excellent low temperature toughness and good weldability. The technology was verified in small-scale commercial production or “mini-rolls”. Suitability for use as linepipe was demonstrated through an extensive development program that covers burst test, fracture toughness evaluation, girth welding technology, etc. A demonstration line was successfully constructed using the pipes manufactured in the “mini-rolls”.

Copyright © 2004 by ASME



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