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51314-3918-An Application of ECDA to a Buried Pipeline Affected by Stray Current Interference

Picture for An Application of ECDA to a Buried Pipeline Affected by Stray Current Interference
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Product Number: 51314-3918-SG
ISBN: 3918 2014 CP
Author: zhao jinyun
Publication Date: 2014
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Tie-Da crude oil pipeline put into operation in September 10 1975 with long-term operation of low throughput and never has run tools for internal inspection. Tie-Da crude oil pipeline is closely parallel with An-Da crude oil pipeline and is severely affected by dynamic stray currents from the operation of nearby Ha-Da electrified railway system between Anshan and Dashiqiao. According to NACE SP 0502an applicability research was carried out in Tie-Da pipeline to assess and reduce the impact of external corrosion on pipeline integrity. During combined CIPS + DCVG survey surveyors installed three GPS synchronized current interrupters at three CP current sources simultaneously the data logger was installed at the test station no more than 5km to record the effect of stray current on the pipe-to-soil potential and utilize this information to correct the recorded CIPS datathus obtain more accurate polarization potential to evaluate the level of cathodic protection and effectively identify and address corrosion activity?The assessment result indicates that accurate location coating corrosion activity of indirect inspection there is no obviously thinning of pipeline wall caused by external corrosion and ECDA is effective. The key point of using ECDA lies in collecting accurate and overall data of pipeline it suggests that pipeline integrity management should be moved forward to construction stage attention should be paid to quality control in the constructing process and give some advices for attention in ECDA usage.
Tie-Da crude oil pipeline put into operation in September 10 1975 with long-term operation of low throughput and never has run tools for internal inspection. Tie-Da crude oil pipeline is closely parallel with An-Da crude oil pipeline and is severely affected by dynamic stray currents from the operation of nearby Ha-Da electrified railway system between Anshan and Dashiqiao. According to NACE SP 0502an applicability research was carried out in Tie-Da pipeline to assess and reduce the impact of external corrosion on pipeline integrity. During combined CIPS + DCVG survey surveyors installed three GPS synchronized current interrupters at three CP current sources simultaneously the data logger was installed at the test station no more than 5km to record the effect of stray current on the pipe-to-soil potential and utilize this information to correct the recorded CIPS datathus obtain more accurate polarization potential to evaluate the level of cathodic protection and effectively identify and address corrosion activity?The assessment result indicates that accurate location coating corrosion activity of indirect inspection there is no obviously thinning of pipeline wall caused by external corrosion and ECDA is effective. The key point of using ECDA lies in collecting accurate and overall data of pipeline it suggests that pipeline integrity management should be moved forward to construction stage attention should be paid to quality control in the constructing process and give some advices for attention in ECDA usage.
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51318-10689-PIPELINE STRAY DIRECT CURRENT (DC) INTERFERENCE

Product Number: 51318-10689-SG
Author: Eric S. Langelund
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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.
Picture for Challenges in Analyzing ECDA Indirect Inspections Data
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51314-3815-Challenges in Analyzing ECDA Indirect Inspections Data

Product Number: 51314-3815-SG
ISBN: 3815 2014 CP
Author: Sorin Segall
Publication Date: 2014
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Picture for Improving the Quality of ECDA Indirect Inspection Data
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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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