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An Evaluation of Cathodic Protection Design Calculations on a Long Pipeline

[+] Author Affiliations
Peter Haas

Corrpro Canada, Inc., Canada

Lorne Carlson

Alliance Pipeline Ltd., Calgary, AB, Canada

Paper No. IPC2004-0544, pp. 209-214; 6 pages
doi:10.1115/IPC2004-0544
From:
  • 2004 International Pipeline Conference
  • 2004 International Pipeline Conference, Volumes 1, 2, and 3
  • Calgary, Alberta, Canada, October 4–8, 2004
  • Conference Sponsors: International Petroleum Technology Institute
  • ISBN: 0-7918-4176-6 | eISBN: 0-7918-3737-8
  • Copyright © 2004 by ASME

abstract

Cathodic protection survey data from a major gas transmission pipeline is reviewed to determine the accuracy of the original design calculations. The calculations used to predict cathodic protection requirements are discussed to show the advantages and limitations of different methods. The analysis shows that the design calculations can predict overall trends, but significant variations can exist locally due to variations in the pipeline and its environment. Observed coating conductance values and recommendations for improved methods are given to aid in the design of future pipeline cathodic protection systems.

Copyright © 2004 by ASME

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