At APEX, we adhere to the American Petroleum Institute (API) Standard 570—the industry’s benchmark for the inspection, repair, and modification of process piping systems. This standard applies to piping that is in service or temporarily out of service with the potential for future use. It excludes decommissioned systems and specialized equipment.

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.

The Direct Current Voltage Gradient (DCVG) Survey is a proven technique used to detect and evaluate coating defects on buried pipelines. By measuring voltage gradients in the soil above the pipeline, DCVG identifies areas where protective coatings may have deteriorated, allowing for targeted maintenance and repair.