Early morning on August 8th, the “Team UHP” and its ultra-high pressure robot moved out to carry out a sample construction site in Bad Karlshafen, Germany. Invited guests on site were ultra-high pressure water jetting experts from comany Falch and experienced sewer specialists from Kanalservice Müller.

The day’s task was to remove concrete deposits in a DN 500mm (20″) main concrete pipe. Previously, Kanalservice Müller had tried using a sewer milling tool to save the pipeline with a rather low daily output. However, the high degree of concrete deposits of 45 – 60% is a great challenge for standard systems. Compared to this, the “Trail Jet 125” trailer high-pressure system provided by Falch with a maximum pressure capacity of 2,500 bar (36,000 psi) was the perfect periphery and ensured optimum operation of the UHP robotic system from IBG.

After arriving at the construction site and commissioning, all participants were briefed. The positioning of the compact vehicle with fitting in the manner of “HydroCut Advance” was rapid as well. After the first successful cutting tests on the concrete deposit inside the pipe, further high-pressure nozzle types were tested with the robot in order to optimize efficiency even more. For the challenges encountered on site, a rotary nozzle turned out to be the best choice. Within 2 hours about 80cm of the tough concrete deposit could be removed. Besides, this was achieved without damaging the wall of the pipe.

We would like to thank everyone involved for the very challenging construction site and the feedback.