PSV Discharge Reducer
PSV Discharge Reducer
(OP)
Is it preferred that using Flat On Top Eccentric Reducer on psv discharge? Somebody disagree with me using concentric reducer on psv discharge.
Thanks!
Thanks!
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RE: PSV Discharge Reducer
Mike Halloran
Pembroke Pines, FL, USA
RE: PSV Discharge Reducer
Katmar Software - AioFlo Pipe Hydraulics
http://katmarsoftware.com
"An undefined problem has an infinite number of solutions"
RE: PSV Discharge Reducer
You've not made any reference to the code you are using, nor what the reducer is intended for. For instance ASME Section VIII, Appendix M-8 reports that discharge pipes shall be at least of the same size as the pressure relief valve outlet.
RE: PSV Discharge Reducer
Thanks!
RE: PSV Discharge Reducer
Mike Halloran
Pembroke Pines, FL, USA
RE: PSV Discharge Reducer
So far as I am aware, every PSV in offshore installations and in most modern refineries discharge into a closed collection system, then via a KO drum to a vent / flare.
RE: PSV Discharge Reducer
It probably doesn't matter. We don't know if the system under discussion is offshore, onshore, in a refinery, undersea, or airborne. We don't even know the state of whatever fluid comes out of the PSV, nor the state and pressure of whatever fluid the PSV is holding back.
I suppose we could guess that the fluid is not completely gaseous, because of the expressed concern about flat up/ flat down/ eccentric expanders, but beyond that, who knows?.
Mike Halloran
Pembroke Pines, FL, USA
RE: PSV Discharge Reducer
RE: PSV Discharge Reducer
Someone correct me if I am wrong but I do not think the orientation of an Eccentric Reducer is a P&ID comment issue.
The proper orientation of an Eccentric Reducer (no matter where it is installed) is the responsibility of a well trained and experienced Piping Layout Designer.
prognosis: Lead or Lag
RE: PSV Discharge Reducer
RE: PSV Discharge Reducer
MortenA, If there is a vent valve right after reducer, is it still prefered using an eccentric top flat reducer?