Closed Interval Survey (CIS) is a specialized technique used to assess the effectiveness of cathodic protection systems on buried pipelines. This method involves measuring the pipe-to-soil potential at closely spaced intervals along the pipeline route, typically every few feet. The data collected helps identify coating defects, areas of corrosion, and other anomalies that may compromise pipeline integrity.

At APEX Integrity Inspections, we utilize advanced CIS equipment and methodologies to deliver accurate, high-resolution data that supports proactive maintenance and integrity management. Our experienced technicians ensure precise data acquisition and interpretation, enabling clients to make informed decisions about asset protection and regulatory compliance.