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01315 STUDIES OF TELLURIC CURRENTS ON PIPELINES IN SOUTHERN SWEDEN

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Product Number: 51300-01315-SG
ISBN: 01315 2001 CP
Author: Hans-Erik Edwall, David Boteler
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Simultaneous recordings of telluric current fluctuations in pipe-to-soil potentials were made at nineteen locations along the gas pipelines in southern Sweden. During the recordings, bonds across insulating joints were switched in and out to vary the electrical length of pipeline sections, and examine how pipeline length influences telluric current effects. The largest potential variations occurred at the ends of electrically-connected sections with a null point in the middle of the section. Changing the joint configuration significantly altered the position where the largest potentials occurred. Model calculations accurately reproduced the potential profiles obtained from the observations. Keywords: telluric currents, pipeline modeling
Simultaneous recordings of telluric current fluctuations in pipe-to-soil potentials were made at nineteen locations along the gas pipelines in southern Sweden. During the recordings, bonds across insulating joints were switched in and out to vary the electrical length of pipeline sections, and examine how pipeline length influences telluric current effects. The largest potential variations occurred at the ends of electrically-connected sections with a null point in the middle of the section. Changing the joint configuration significantly altered the position where the largest potentials occurred. Model calculations accurately reproduced the potential profiles obtained from the observations. Keywords: telluric currents, pipeline modeling
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01316 OBSERVATIONS OF TELLURIC CURRENTS IN CANADIAN PIPELINES

Product Number: 51300-01316-SG
ISBN: 01316 2002 CP
Author: D.H. Boteler and L. Trichtchenko
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07686 ASSESSING PIPELINE VULNERABILITY TO TELLURIC CURRENTS

Product Number: 51300-07686-SG
ISBN: 07686 2007 CP
Author: D.H. Boteler
Publication Date: 2007
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04050 Telluric Currents and Their Effect on Cathodic Protection of Pipelines

Product Number: 51300-04050-SG
ISBN: 04050 2004 CP
Author: David Boteler, Geological Survey of Canada
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Telluric currents cause variations in pipe-to-soil potentials that take the potentials outside the desired range for cathodic protection. This paper reviews the causes of telluric currents, such as geomagnetic storms and tidal water movements, and shows how knowledge of these phenomena can be used to determine the occurrence of telluric current in pipelines.
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