PiSigma
"the engineer"
There is only so much canablizing you can do to fix equipment. If pump seals are the same type, sure strip away, same with manual valves and piping.Well, as a starter, a typical heavy refinery eqipment is as strong as the sidearmour of a main battle tank.
Additionally, all refinfery has few hundred, or thousand count maintanance team, whom has decades worth of experience about the equipment.
They have spares, and usually the equipment accross internal plants similar or same.
Means, if you destroy the pumps of the main fractional distillation column third time, and they haven't got more spare then they will switch off a less important plant , and raid the pumps and valves of it.
Worst case they can't make the proper diesel : Petrol : kertosene ratio,and has to store excess heavy for bit longer time.
There are engineers in the plant, and if needed they will re-design the equipment to continue the process.
So, to cause real harm you need to drop lot of bombs, periodically, and destroy lot of equipment .
And of course, in half year time the new spares manufactured, so this process needs to repeated continously, and with increased speed.
Bescause they are not stupid, so the supliers will start to make more equipment epxecting repeated strikes.
When it comes down to actual equipment, process conditions vary widely between equipment so it's not easy to replace or reroute fluids.
Refineries don't have equipment as thick as tank armor. Most refinery equipment are fairly low pressure, so equipment and piping are designed for ANSI 150 or 300. That means the steel is not very thick, and you don't need to have it broken just weakened. Fires weaken steel... So unless you can hydro test everything, good luck running the plant.
Maintenance crew don't fix equipment in the fly and certainly can't fix a complex compressor or patch up a hole in a vessel. Their job is to swap out broken equipment with spares.
Site engineers don't redesign equipment on the spot, they give suggestions to reroute or optimize flows.
If you want to know how oil and gas facilities are run in real life, I literally run an oil and gas facility, this is my bread and butter. And I have worked in a refinery before (Anacortes Washington Shell).