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Title: Telluric Current Effects On Buried Pipelines
Author: Donald N. Gideon
Source: American Gas Association 1970
Year Published: 1970
Abstract: Data on telluric gradients and on telluric elTects on pipelines were recorded by four pipeline companies at sites in Washington, California, Wisconsin, and Ohio. Pipe-to-soil potentials and pipe currents were recorded at three points on a section of each piepline at least 10 miles long two pairs of electrodes were arranged in an L-shaped array near each pipeline for recording the telluric components. Recordings were obtained continuously at each station for a period of 12 to 15 months the recordings were sent to Battelle for analysis. Amplitude ranges determined for each 12-hour period for each station and averaged over some 200 days yielded long-term average amplitudes. Pipe-to- soil potential average amplitudes were mostly in the range of 10 to 30 my, and pipe current average amplitudes were mostly in the range of 0.3 to 0.8 amperes. Assessment of the significance of the observed effects in terms of corrosion interference leads to the conclusion that the effects are insignificant both for coated, protected lines, and for bare lines.

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