Thanks all. Unfortunately PIG's not an option (relatively small bore (6" Schdule 10), with no launchers in place).
We are trying an accoustic option from the local water supply company and are keeping our fingers crossed.
Regards
Kevin
Thanks for replying. I had found a supplier who recommended 5% Hydrogen/ Nitrogen mix. I also believe they need to move away from underground pipe and consider relocating the power plant (they have the space at the second generating Site) as part of their IRP.
Glad to hear this solution is...
A client of mine transports 2 diesel oil underground (yikes!) from their bunkering facility to a peak shaving power plant located in the town. The line is 14 miles long and is a 6" ANSI 150 # carbon steel pipe. It was installed some years ago and was grandfathered in. They know the line leaks...