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Crack Propagation and Arrest in X70 1420x21,6mm Pipes for New Generation of Gas Transportation System

[+] Author Affiliations
Dmitry A. Pumpyanskyi, Vladimir I. Stolyarov

TMK, Moscow, Russia

Tatiana P. Lobanova, Andrey B. Arabey

GAZPROM, Moscow, Russia

Igor Y. Pyshmintsev, Alexey O. Struin

RosNITI, Chelyabinsk, Russia

Vladimir V. Kharionovsky

VNIIGAZ, Razvilka, Russia

Paper No. IPC2008-64474, pp. 365-370; 6 pages
  • 2008 7th International Pipeline Conference
  • 2008 7th International Pipeline Conference, Volume 3
  • Calgary, Alberta, Canada, September 29–October 3, 2008
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4859-3 | eISBN: 798-0-7918-3835-8
  • Copyright © 2008 by ASME


The ductile fracture arrest capability of gas pipelines is seen as one of the most important factors in the future acceptance of new high strength pipeline steels for high pressure applications. New North-European pipeline project is based on application of X70 pipes designed for high gas pressure of 9,8MPa. To study fracture propagation behavior in cold climate the full scale tests were carried out using longitudinally and spiral welded pipes with different microstructure of base metal. Results of the tests with crack propagation studies in predominately ferrite-pearlite (FP) and acicular ferrite (AF) steels possessing similar Charpy energy are presented. Crack propagation mechanisms in base metal and along spiral weld were studied and are presented with strain distribution along crack.

Copyright © 2008 by ASME



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