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51318-10689-PIPELINE STRAY DIRECT CURRENT (DC) INTERFERENCE

Picture for PIPELINE STRAY DIRECT CURRENT (DC) INTERFERENCE
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Concerns related to stray DC interference. Including safety, testing, documentation and lessons learned. Also addressed are DC powered transit systems and other unordinary sources of DC interference.

Product Number: 51318-10689-SG
Author: Eric S. Langelund
Publication Date: 2018
Industry: Cathodic Protection
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When do you have stray direct current (DC) interference on a pipeline? What tasks are required to ensure that an effective level of cathodic protection is being maintained? What are some of the methods utilized to mitigate stray DC interference?

With new pipelines being built and existing pipelines aging, maintaining a pipeline’s cathodic protection is a dynamic task that never ends. Safety, coordination, troubleshooting, various testing methods and construction practices are some of major parts associated with mitigating stray DC interference. As corrosion engineers we must work in all of these areas to ensure that a pipeline maintains an effective level of cathodic protection and any stray DC interference has been identified and addressed.

This paper discusses the many concerns related to stray DC interference. Including safety, testing, documentation and lessons learned. Also addressed are DC powered transit systems and other unordinary sources of DC interference. The topics discussed are practical and the lessons learned are first-hand accounts. The purpose of this paper is to share what has been learned and some of the company policies that have been taken from many years of pipeline operation.

Key words: direct current, DC, interference, mitigation

When do you have stray direct current (DC) interference on a pipeline? What tasks are required to ensure that an effective level of cathodic protection is being maintained? What are some of the methods utilized to mitigate stray DC interference?

With new pipelines being built and existing pipelines aging, maintaining a pipeline’s cathodic protection is a dynamic task that never ends. Safety, coordination, troubleshooting, various testing methods and construction practices are some of major parts associated with mitigating stray DC interference. As corrosion engineers we must work in all of these areas to ensure that a pipeline maintains an effective level of cathodic protection and any stray DC interference has been identified and addressed.

This paper discusses the many concerns related to stray DC interference. Including safety, testing, documentation and lessons learned. Also addressed are DC powered transit systems and other unordinary sources of DC interference. The topics discussed are practical and the lessons learned are first-hand accounts. The purpose of this paper is to share what has been learned and some of the company policies that have been taken from many years of pipeline operation.

Key words: direct current, DC, interference, mitigation

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CP Interference and CP Influence and how the two differ. Both will be demonstrated by case histories and some solutions will be presented.
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ISBN: 9004 2017 CP
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In this paper exhaustive field study trials to monitor the pipe to soil potential over an extended time period and subsequent analysis of data has been discussed with reference to the critical Combined Cathodic and Anodic Interference phenomena observed on pipelines.
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03710 INTERFERENCE TESTING AND CASE HISTORIES

Product Number: 51300-03710-SG
ISBN: 03710 2003 CP
Author: Jeffrey L. Didas
Publication Date: 2003
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Interference Testing is a task learned through education and experience and is one of the basic skills of Cathodic Protection Personnel. This paper will discuss interference testing and present some case histories, of basic static interference situations and the mitigation methods used.
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