In 2018, a malfunction occurred in the underground pipeline of a power station cooling system located in the southern region of Israel. The pipe was an 800mm PE100 SDR11 pipe.
The repair was carried out by removing a section of the pipeline several meters long and replacing it with a new section which was welded to the system using two 800mm electrofusion couplers. The job was executed around the clock using heavy-duty tools, and the cooling system resumed operation in less than 36 hours from the moment of malfunction detection.
The failed section of pipe was sent for testing at a US located laboratory. Test findings suggested that the reason for failure was related to the structural material of the pipe.
Due to concern for additional failures and the possible consequences of future shutdowns, it was decided to replace the existing buried line with two 560mm Polyethylene above ground lines.
Transition to two lines will enable partial operation of the production site even during specific failure or during maintenance. In addition, design emphasis was given to minimize the damage caused by stopping the cooling system during the transition between the old and new lines.