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Evaluation of Compressive Strain Limit of X80 Saw Pipes With Girth Welding by FE Analysis

[+] Author Affiliations
Hidenori Shitamoto, Masahiko Hamada, Shuji Okaguchi

Sumitomo Metal Industries, Ltd., Amagasaki, Japan

Nobuaki Takahashi

Sumitomo Metal Industries, Ltd., Kashima, Japan

Izumi Takeuchi

Sumitomo Metal Industries, Ltd., Tokyo, Japan

Yoshiyuki Matsuhiro

Sumitomo Metal Pipeline and Piping, Ltd., Sakai, Japan

Shusuke Fujita

Sumitomo Metal Pipeline and Piping, Ltd., Warabi, Japan

Paper No. IPC2010-31408, pp. 213-219; 7 pages
  • 2010 8th International Pipeline Conference
  • 2010 8th International Pipeline Conference, Volume 4
  • Calgary, Alberta, Canada, September 27–October 1, 2010
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4423-6 | eISBN: 978-0-7918-3885-3
  • Copyright © 2010 by ASME


The expansion of supply capacity of natural gas to market is expected from the concern of environmental conservation by less CO2 emission. Transportation cost has been focused for natural gas to be competitive in the market. High-pressure gas pipelines have constructed by large diameter and high strength line pipes to improve transportation efficiency of gas transmission pipelines. High strength line pipes have been developed to cope with high-pressure operation. Strength in circumferential direction on line pipe is the prime target to hold high pressure safely. In terms of pipe size, pipe diameter has been increased to lead larger D/t. Both of higher strength and larger D/t result in less favorable to deformability of pipeline. To apply strain based design to pipeline, the evaluation of strain capacity, which is related to deformability of line pipe, is required supposing the pipeline encounters large scale ground movement such as earthquake or landslide. It is not simple to find the criteria to prevent leak or rupture of pipeline in such events, as not only pipe property but also interaction between pipe and soil are needed to consider. Gas transmission pipelines are constructed by joint girth welding. The strain capacity of pipeline with girth weld has to be investigated for strain based design. Full scale bending test of joint welded pipe was conducted and FEA model to assess strain capacity of pipeline with girth weld is developed.

Copyright © 2010 by ASME



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