Pressure hydrostatic test or pressure relief device, which is greater?
Pressure hydrostatic test or pressure relief device, which is greater?
(OP)
I dont know to pressure vessel wich is greater if pressure hydrostatic (Ph= 1.3*Pdesign) (ASME VIII) or set pressure relief device Psv, that pressure must be less than the Ph?
can u help me?
Best regards for all,
can u help me?
Best regards for all,





RE: Pressure hydrostatic test or pressure relief device, which is greater?
RE: Pressure hydrostatic test or pressure relief device, which is greater?
RE: Pressure hydrostatic test or pressure relief device, which is greater?
But that is only if the vessel is new ??? or not.
Because i have pressure vessels but they have many years in operation.
Best regards,
RE: Pressure hydrostatic test or pressure relief device, which is greater?
Please check the nameplate information against the set point of the PRV tag.
RE: Pressure hydrostatic test or pressure relief device, which is greater?
They dont have any name plate, its a problem!! , i just have MAWP of the real thickness.
Thanks,
RE: Pressure hydrostatic test or pressure relief device, which is greater?
Regardless of whether the vessels are new or not, the PRV must not be set higher than the MAWP, as rustbuster stated - see UG-134 in ASME VIII Div1.
I may have misunderstood your original question - if you are wanting to re-hydrotest existing vessels, then you would need to remove or isolate any PRVs if you are testing above MAWP - see for example paragraph 6.5 in API-510.
Cheers,
John
RE: Pressure hydrostatic test or pressure relief device, which is greater?
All of those conditions become potentially deadly situations.
RE: Pressure hydrostatic test or pressure relief device, which is greater?
RE: Pressure hydrostatic test or pressure relief device, which is greater?
Best regards for all,
RE: Pressure hydrostatic test or pressure relief device, which is greater?
Cheers,
gr2vessels