Detection Process:
1) Full-line pipeline environmental survey
2) Full-line pipeline external anticorrosion layer quality detection or cathode protection validity detection, another detection method can be adopted at pipe sections where one detection method is difficult to implement.
3) Stray current interference detection of pipe-to-soil potential anomalies, and pipeline wall thickness TEM detection of pipe sections with wall thickness anomalies
4) Excavation detection according to 10 points per 100 kilometers
5) Compile detection reports and provide maintenance advices