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Effects of Geometric Imperfection on Bending Capacity of X80 Linepipe

[+] Author Affiliations
Nobuhisa Suzuki

JFE R&D Corporation, Kawasaki, Japan

Joe Kondo, Nobuyuki Ishikawa, Mitsuhiro Okatsu, Junji Shimamura

JFE Steel Corporation, Fukuyama, Hiroshima, Japan

Shigeru Endo

JFE Steel Corporation, Kurashiki, Japan

Paper No. IPC2006-10070, pp. 111-119; 9 pages
  • 2006 International Pipeline Conference
  • Volume 1: Project Management; Design and Construction; Environmental Issues; GIS/Database Development; Innovative Projects and Emerging Issues; Operations and Maintenance; Pipelining in Northern Environments; Standards and Regulations
  • Calgary, Alberta, Canada, September 25–29, 2006
  • Conference Sponsors: Pipeline Division
  • ISBN: 0-7918-4261-4
  • Copyright © 2006 by ASME


Validation of finite element modeling to predict bending capacity of linepipes and effects of geometric imperfection on the bending capacity are presented. A bending test of an X80 linepipe was conducted to discuss the validation and investigate the effects. The geometric imperfection of the linepipe about the outside diameter, the wall thickness and the longitudinal blister of the linepipe was measured in the round. Consequently, the results obtained by FEA taking into account the geometric imperfection present good agreement with the experimental data. And the moment capacity is virtually independent of the geometric imperfection however the strain capacity of the linepipe is quite susceptible to the geometric imperfection.

Copyright © 2006 by ASME



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