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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
Close Interval Potential Surveys (CIPS) and Direct Current Voltage Gradient (DCVG) surveys are important parts of any pipeline integrity or External Corrosion Direct Assessment (ECDA) program. Changes in technology and computing have introduced new tools for data acquisition and display for the field surveyor, data analyst and pipeline operator. The introduction of computerized data loggers revolutionized the pipeline survey industry, generating larger amounts of accurate data across multiple input channels. Computerized processing then assisted the analyst in their role of producing results for the pipeline operator. Technology has allowed the industry to customize the display and visualization of multiple data streams to suit the needs of the distinct roles.
Keywords: CIPS, DCVG, data analysis, visualization, instrumentation
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This paper will show improvements in interpretation of direct current voltage gradient % IR and how accurate selection of pipeline coating rehabilitation location based on this concept would lead to improvements in cathodic protection performance. Case studies from previous external corrosion direct assessment digs will be presented.