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External Corrosion Control of Northern Pipelines

[+] Author Affiliations
S. Papavinasam, A. Doiron, T. Panneerselvam

CANMET Materials Technology Laboratory, Ottawa, Ontario, Canada

Paper No. IPC2008-64069, pp. 135-144; 10 pages
doi:10.1115/IPC2008-64069
From:
  • 2008 7th International Pipeline Conference
  • 2008 7th International Pipeline Conference, Volume 2
  • Calgary, Alberta, Canada, September 29–October 3, 2008
  • Conference Sponsors: International Petroleum Technology Institute and the Pipeline Division
  • ISBN: 978-0-7918-4858-6 | eISBN: 798-0-7918-3835-8
  • Copyright © 2008 by Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resouces

abstract

Based on one-year laboratory experiments in which samples were exposed to temperatures as low as −45°C and two-year data from field experiments, it is concluded that Canadian Standards Association (CSA) standards CSA Z662, CSA Z245.20 and CSA Z245.21 adequately address evaluation of coatings for northern pipelines. However, in order to evaluate the effects of low temperatures, specimens should be exposed for at least four months. Coatings qualified by CSA Z245.21 (System B1 and B2) are less affected by exposure to low temperatures than those qualified by CSA Z245.21 (System A1) and CSA Z245.20. Corrosion potentials measured at lower temperatures are in the range of potentials to use the cathodic protection (CP) potential criteria of −0.85 V vs. copper-copper sulphate for northern pipelines.

Copyright © 2008 by Her Majesty the Queen in Right of Canada, as represented by the Minister of Natural Resouces
Topics: Corrosion , Pipelines

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