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Applicability of Mandrel Elbow to High Pressure Gas Pipeline

[+] Author Affiliations
Hiroyuki Horikawa, Hideo Toma

JFE Engineering Corporation, Yokohama, Japan

Yasuo Yabe, Mitsunori Tsukidate

Nippon Bend Co., Ltd., Tokyo, Japan

Nobuhisa Suzuki

PIN Technologies, Yokohama, Japan

Paper No. IPC2014-33371, pp. V004T11A008; 8 pages
doi:10.1115/IPC2014-33371
From:
  • 2014 10th International Pipeline Conference
  • Volume 4: Production Pipelines and Flowlines; Project Management; Facilities Integrity Management; Operations and Maintenance; Pipelining in Northern and Offshore Environments; Strain-Based Design; Standards and Regulations
  • Calgary, Alberta, Canada, September 29–October 3, 2014
  • Conference Sponsors: Pipeline Division
  • ISBN: 978-0-7918-4613-1
  • Copyright © 2014 by ASME

abstract

Applicability of mandrel elbows to high pressure gas pipelines is discussed in this paper taking into account the seismic integrity to withstand liquefaction-induced permanent ground deformation. Bending test and FE analysis of X65, 45 deg. mandrel elbow with diameter of 24-in were conducted in order to evaluate the seismic integrity for lateral spreading due to liquefaction.

Local buckling behaviors of the closing-mode test was simulated by FEA and calculation of existing seismic design code for high pressure pipelines can estimate maximum bending angle as limit state of the mandrel elbow conservatively. The results clarify that mandrel elbows can be applied to high pressure pipelines using conventional design method including the design code and FEA. In addition, buckling behaviors of the mandrel elbow were similar to those of high-frequency induction bends which have been used for high pressure pipelines in Japan.

Copyright © 2014 by ASME

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