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Lessons Learned During 10 Years of ECDA Application

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This paper summarizes the results of ten years of External Corrosion Direct Assessment (ECDA) application on more than 100 projects and includes a number of important lessons learned during the process.

Product Number: 51315-5601-SG
ISBN: 5601 2015 CP
Author: Sorin Segall
Publication Date: 2015
Industry: Corrosion Monitoring and Control
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This paper summarizes the results of ten years of ECDA application on more than 100 projects and includes a number of important lessons learned during the process.The large majority of the ECDA projects resulted in “clean bills of health” for the assessed pipelines. The actual number of direct examinations seldom exceeded the minimum number of digs required by NACE Standard SP 0502-2010.Topics like influence of pipe depth and local soil resistivity in classifying and prioritizing DCVG indications dealing with reversed gradients avoiding “double dipping” (i.e. prioritizing non-complimentary severe indications as Immediate Action Required) and dealing with “false” AC corrosion indications are discussed in detail in this paper.Keywords: conference papers, conference papers 2015, ECDA, CIPS, DCVG, DC, Coupons

This paper summarizes the results of ten years of ECDA application on more than 100 projects and includes a number of important lessons learned during the process.The large majority of the ECDA projects resulted in “clean bills of health” for the assessed pipelines. The actual number of direct examinations seldom exceeded the minimum number of digs required by NACE Standard SP 0502-2010.Topics like influence of pipe depth and local soil resistivity in classifying and prioritizing DCVG indications dealing with reversed gradients avoiding “double dipping” (i.e. prioritizing non-complimentary severe indications as Immediate Action Required) and dealing with “false” AC corrosion indications are discussed in detail in this paper.Keywords: conference papers, conference papers 2015, ECDA, CIPS, DCVG, DC, Coupons

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Improving the Quality of ECDA Indirect Inspection Data

Product Number: 51317--9038-SG
ISBN: 9038 2017 CP
Author: Sorin Segall
Publication Date: 2017
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The quality of indirect inspection data is critical in an External Corrosion Direct Assessment (ECDA).  The need exists to increase the accuracy of the field data collection, to improve the data processing and to effectively present the results. This paper describes several challenges.
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Interpretation and Selection of Direct Examination Locations with Respect to ECDA Methodology

Product Number: 51317--9304-SG
ISBN: 9304 2017 CP
Author: Chukwuma Onuoha
Publication Date: 2017
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This paper presents advances in the interpretation of indirect inspection data and selection of ECDA direct examination locations and how the accurate selection of locations most susceptible to external corrosion would improve pipeline integrity.
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51318-11518-Visualizing Results for CIPS & DCVG

Product Number: 51318-11518-SG
Author: Elizabeth Nicholson
Publication Date: 2018
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New tools for data acquisition and display for the field surveyor, data analyst and pipeline operator as they affect Close Interval Potential Surveys (CIPS) and Direct Current Voltage Gradient (DCVG) surveys
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