Table 6 Selection guide for detection and location methods of buried non-metallic pipelines
From: Current Trends and Perspectives of Detection and Location for Buried Non-Metallic Pipelines
Methods | Â | Scope of application | Methods | Scope of application |
|---|---|---|---|---|
Electromagnetic tracer line method | Â | Â | Â | Â |
 Direct connection | Tracer lines are laid on the surface of non-metallic pipes | Inertial gyroscope | The diameter of the inertial navigation unit is smaller than the diameter of the non-metallic pipe | |
 Induction |  | ECT | Any surface | |
| Â | Â | Â | Pipe excitation method | Non-metallic pipes are exposed on the surface |
Tracer probe method | Probe diameter is smaller than the diameter of non-metallic pipe | Elastic wave method | Any surface | |
 GPR | Any surface, the image has multiple solutions | Point vibration measurement | Soft surface | |
 RFID | Electronic tags are buried near non-metallic pipes | GIS | Towns where buried non-metallic pipelines have been digitized | |
Infrared thermography | Non-metallic pipes containing high-temperature fluid | In-pipe Robot | Robot diameter is smaller than the non-metallic pipe diameter | |
 HDRM | Any surface | Other emerging technologies | Developing stage | |