Pipe Penetrating Radar (PPR)
Definition - What does Pipe Penetrating Radar (PPR) mean?
Pipe penetrating radar (PPR) is a technology used to detect damages and leaks, within and around, the pipe diameter. This method can be used to detect damage in underground pipes of different materials including PVC, concrete, vitrified clay, and HDPE. Unlike ground penetrating radar, PPR can pass through non-ferrous pipe walls, the bedding of the pipe, and through conductive soil. To a certain extent, PPR can map areas outside the pipe that are filled with air or water.
Trenchlesspedia explains Pipe Penetrating Radar (PPR)
The robot carrying the PPR is allowed to traverse through the pipe under inspection. The pulse emanating from the PPR travels through the material of the pipe. Depending on any change in the property of the material, this pulse is reflected or refracted. In sewer rehabilitation, this method can be used to detect liner bonding and voids outside pipe walls by detecting variations in bedding conditions. Using PPR can help to determine the structural stability of the pipe, and can prevent sinkholes and save on costly rehabilitation with the early detection of problem areas.