we are producing acetic acid , proc

[vibtrip]

we are producing acetic acid , process has 5.0 kg/cm2 g pressure requirement . temp. is 55 deg c, we have prc controller to maintain pressure of reactor .do we require rupture disc/prv .

 

[25362]

Most, or all, commercial processes for production of acetic acid are based on oxidations. Do you have other levels of protection, such as reactant killing trips, alarms, probably redundant, external fire protection, etc. complemented with good inspection, testing and maintenance practices ?

 

[Montemayor]

Vibtrip:

You say your reactor is working at 71 psig (5 kg/cm2). Unless it is a tiny reactor, it is classed as a pressure vessel by ASME and must have a pressure relief device directly connected on the vessel. This is according to the ASME code and regardless where in the free world you are running this reactor, you surely have an insurance company that demands a code compliance in order to give you coverage.

If you are operating in the USA, you surely have had the OSHA-required HazOp review and have thoroughly covered this relief requirement there and documented the results. Surely, your HazOp discussed the Emergency Relief needs of your reactor and you have applied, for example, DIERS technology.

I don't know the details of your reaction or your equipment, but hopefully the above explains that this has to be covered and documented - by law! You can use Pressure relief valves, Rupture discs, Buckling Pins, etc. ; but you normally must have a documented and calculated relief system in place and operable. I don't understand why you are asking this if the reactor is already in place and working. This should have been addressed and resolved long ago.

Art Montemayor