Pressure gauge selection
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There is a set of square-shaped pressure vessels; during operation, the rupture disc is pushed open and the safety valve activates. A brief period of high pressure must occur during this reaction process, yet the online pressure gauge in the DCS failed to capture that pressure level. I have some understanding of this phenomenon – when a small amount of air gets into the system, an explosion can occur. I would like to ask the experts: could it be that the pressure gauge chosen is not suitable? Currently, diaphragm-type oil-immersed mechanical pressure gauges are being used; is this an unreasonable choice, as it prevents the detection of high pressures in such brief moments?
Can’t it be recorded in an instant?
The instantaneous pressure fluctuations were not recorded.
It seems that this reaction requires protection with an inert gas and a slight positive pressure; otherwise, once air gets in, there’s no way to fix it
Why not a pressure transmitter?
I strongly suspect he chose an electric contact pressure gauge.