This article aims to investigate the common technical issues regarding the non-excavation detection of the anti-corrosion coating condition of long-distance pipelines, and propose solutions and technical measures. Among the external corrosion detection methods for the regular inspection of long-distance pipelines, the non-excavation detection of the anti-corrosion coating condition detection is a major aspect. The PCM (Pipeline Current Mapper) testing technology is used. The quality of its detection determines the detection result of damaged areas in the anti-corrosion coating and the safety of long-distance pipeline operation. On the basis of analyzing the significance of PCM detection for long-distance pipelines, this article explores the prevalent problems encountered in PCM detection of long-distance pipelines. In combination with years of practical operation experience and relevant national regulations, targeted solutions and treatment approaches are proposed.

long-distance pipelines  /  non-excavation detection of anti-corrosion coating condition  /  technical discussion