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PRCI PR-186-9105
- Multiple Pipelines in Right of Way: Improved Pipe-to-Soil Potential Survey Methods
- Report / Survey by Pipeline Research Council International, 10/29/1993
- Publisher: PRCI
$448.00$895.00
L51692e
Cortest Columbus Laboratories, Inc.
Need: Pipe-to-soil potential measurements are the primary means for monitoring the effectiveness of cathodic protection systems. All criteria for cathodic protection employ, in one form or another, a potential measurement of the pipe with respect to a reference electrode.
Result: This research project was undertaken to determine what portion of a pipe is sampled by an above-ground potential measurement. One important area that has not yet been investigated is what portion of a pipe is sampled during a potential survey of a pipeline in a right-of-way containing multiple pipelines directly bonded to each other. The overall objective of this project was to improve the ability to interpret close interval on- and off-potential surveys in rights-of-way containing multiple pipelines. The project objective was accomplished by completing the following specific task oriented goals: (1) to expand the previously developed computer model to include multiple pipelines in the right-of-way, (2) to predict interaction effects between two pipelines in the same right-of-way, (3) to extend modeling activities to more complex pipeline situations by modeling specific case studies, and (4) to provide field verification of the modeling activities.
Benefit: This project was completed over a two-year period from 1991 through 1992 through a series of tasks involving finite element analysis (FEA) computer modeling and field inspections of buried pipelines. The incentives for performing this project were (1) the establishment of a better understanding of pipe-to-soil potentials measured on multiple pipelines in the same right-of-way and (2) the savings in time and money provided by improved interpretation of close interval surveys produced by this increased understanding.
Cortest Columbus Laboratories, Inc.
Need: Pipe-to-soil potential measurements are the primary means for monitoring the effectiveness of cathodic protection systems. All criteria for cathodic protection employ, in one form or another, a potential measurement of the pipe with respect to a reference electrode.
Result: This research project was undertaken to determine what portion of a pipe is sampled by an above-ground potential measurement. One important area that has not yet been investigated is what portion of a pipe is sampled during a potential survey of a pipeline in a right-of-way containing multiple pipelines directly bonded to each other. The overall objective of this project was to improve the ability to interpret close interval on- and off-potential surveys in rights-of-way containing multiple pipelines. The project objective was accomplished by completing the following specific task oriented goals: (1) to expand the previously developed computer model to include multiple pipelines in the right-of-way, (2) to predict interaction effects between two pipelines in the same right-of-way, (3) to extend modeling activities to more complex pipeline situations by modeling specific case studies, and (4) to provide field verification of the modeling activities.
Benefit: This project was completed over a two-year period from 1991 through 1992 through a series of tasks involving finite element analysis (FEA) computer modeling and field inspections of buried pipelines. The incentives for performing this project were (1) the establishment of a better understanding of pipe-to-soil potentials measured on multiple pipelines in the same right-of-way and (2) the savings in time and money provided by improved interpretation of close interval surveys produced by this increased understanding.
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