I can’t get a miss in my engine diagnosed this fast, and the call is not terrorism? The reports are they were pressure testing the gas lines. I thought they used air for the pressure test. Gas guys out there, is that right?
When you build a line, you hydrostatically test it, ie, pressure test it with water. You never want to conduct a pressure test with a gas.
But they were purging the line. When you build it, it is full of air and lots of left over filthy construction crub and weld slag. You have to purge the line to get the air out and blow out all the junk. I once started a new boiler at a hospital and the small orifices in the gas pressure regulator were always getting fouled. We took the 4” line apart and added a diversion to the outside and let it blow clean with short bursts. After that, no more fouled pressure regulator and we could get down to business.
The gas line to a 600 MW plant is huge.