The CISBOT robot launches vertically into live gas mains via a 14 foot tall, aluminum launch tube mounted to a valve and fitting connected to the main. The system travels up to 250 feet in either direction of its entry point sealing up to 40 joints from a single street excavation in 16 inch to 36 inch cast iron pipe. CISBOT is operated from a compact box truck and only requires one 6 foot x 6 foot street excavation every 500 feet. The robot drills holes in each joint then injects an anaerobic sealant at multiple positions along the inner circumference of the pipe. When the sealant hardens it forms a new long lasting flexible gasket. Based on the results of extensive testing performed by Cornell University, the sealant has an estimated effective life of 50 years.
Unlike traditional pipe repair methods, CISBOT causes virtually no disruption to gas customers or traffic on local streets. And because the robot requires only one small excavation to enter the pipe, the costs for engineering, permitting, excavation and restoration are reduced so much that |