Dear all,
We are doing a HAZOP of reciprocating compressor(capacity is around 3000Nm³/h, flammable gas, inlet pressure is around 2bar, outlet pressure is around 12bar).
During discussion, some scenarios are developed:
1. no flow of lubricating oil
2. high discharge temperature
3. low suction pressure(vacuum)
for the consequence of these scenarios, some think the raw risks are high, and SIL loops are needed, some think the risks are not so dangerous, and DCS loop protections are enough.
What do you think about these risks?