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Pressure Reductions and Pipeline Excavation

[+] Author Affiliations
Robert I. Coote

Coote Engineering Ltd., County Tyrone, Northern Ireland

J. Kyle Keith

TransCanada, Calgary, AB, Canada

Paper No. IPC2004-0395, pp. 2035-2040; 6 pages
doi:10.1115/IPC2004-0395
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

Pipeline companies often reduce the pressure while performing maintenance activities and integrity excavations on in-service pipelines. Despite this practice, pipeline design codes, regulations and industry publications offer little guidance on what factors should be considered to determine how much, if any, the pressure should be reduced from operating levels during excavation activities. Also, it is not commonly understood what level of safety is introduced with these reductions and what historical operating pressure level should be used as the basis for the reductions. A literature survey and an interview process with CEPA member companies summarized common industry practices and determined factors to be considered when assessing if and how much of a pressure reduction is appropriate while excavating an operating energy pipeline.

Copyright © 2004 by ASME
Topics: Pressure , Pipelines

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