The application of polarization potential measurement and transmission technique in Dongying-Huangdao oil pipeline

To accurately evaluate the cathodic protection effect for buried steel pipeline, the use of pipe interface polarization potential is required. In this paper, a kind of new CP potential detection and wireless communicating technology are introduced. This technology integrates the polarization probe and CP data acquisition and wireless transmission module together, and can realize the real-time collecting the data of pipeline polarization potential and data transmission. In portion of Dongying-Huangdao Oil Pipeline, a contrast test between the uninterrupted detection method with the remote detection system and the portable reference method was carried out. Results showed that the technology in combination with the polarized probe testing method not only can realize the monitoring pipeline's potential with real-time uninterrupted way, but also accurately measure more valuable polarization potential of the pipeline. Adopting the polarized probe technology is helpful for improving CP protection of pipeline, substituting for ON/OFF potential to estimate the effectiveness of cathodic protection. Based on the technology, operator can real-time control the real state of pipeline's CP and timely repair or maintain the poorly protected pipeline sections.