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Crack Propagation Modeling and Crack Arrestor Design for X120

[+] Author Affiliations
Andrea Fonzo, Andrea Meleddu, Massimo Di Biagio

Centro Sviluppo Materiali S.p.A., Pula, CA, Italy

Gianluca Mannucci, Giuseppe Demofonti

Centro Sviluppo Materiali S.p.A., Rome, Italy

Clifford W. Petersen

ExxonMobil Upstream Research Company, Houston, TX

Nicholas E. Biery

ExxonMobile Upstream Research Company, Houston, TX

Paper No. IPC2006-10319, pp. 317-325; 9 pages
  • 2006 International Pipeline Conference
  • Volume 3: Materials and Joining; Pipeline Automation and Measurement; Risk and Reliability, Parts A and B
  • Calgary, Alberta, Canada, September 25–29, 2006
  • Conference Sponsors: Pipeline Division
  • ISBN: 0-7918-4263-0
  • Copyright © 2006 by Centro Sviluppo Materiali S.p.A. and ExxonMobil Upstream Research Company


The new, higher grade pipeline steels provide an opportunity to reduce pipeline costs by enabling a shift to higher pressure at reasonable wall thickness. However, these higher operating stresses place greater demands on the pipeline, particularly when a running fracture is considered. Several studies have shown that intrinsic arrest cannot be counted on for these grades under all operating conditions. In such cases, crack arrestors will be needed. This paper presents results obtained using CSM’s proprietary PICPRO® finite element code to predict the performance of crack arresters on X120 pipes, and shows that the predictions agree well with full-scale experimental results obtained in arrestor trials.

Copyright © 2006 by Centro Sviluppo Materiali S.p.A. and ExxonMobil Upstream Research Company



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