Robotic water jetter effectively removes failed liner

Feb 11, 2020


Problem: A relining contractor in Empfingen, Germany, lined a 16-inch clay pipe with a 5 mm fiberglass liner with 1 million psi flexural modulus and it failed. Subsequently, they relined it with an undersized 5 mm fiberglass liner, which then failed too. The municipality now had to remove 10 mm of failed 16-inch liner 200 feet long.


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Solution: I.S.T. North America was in the process of developing a robotic water jet cutter designed to work effectively in these sorts of situations. For this application, they decided to use a two-beam model. The robot provides up to 43,000 psi of water cutting power. They determined that only 26,000 psi at a flow rate of 6.8 gpm was needed to pierce the fiberglass and rip it apart while preventing damage to the host pipe. After the first day of training, they chose a cutting style of three-piece cross sections and removed the long strips with a jet truck. 


Result: It took only three days to fully remove the 200-foot section of double-lined 16-inch fiberglass liner. 212-419-0069;

Brought to you by

I.S.T. Innovative Sewer Technologies of North America

I.S.T. Innovative Sewer Technologies is among the leading developers of rehabilitation equipment. We specialize in UV Cure Equipment, Robotic Cutter Systems, & Lateral Rehabilitation Technologies. Our master company started in 1998 with a location in Bochum, Germany. Currently, they are staff with over 80 employees and have subsidiaries in 6 different locations worldwide. At our location in Tappan, NY we have a full staff to preform in-house repairs, services, loaners, and inventory of parts.

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