PSV label changed to PV
PSV label changed to PV
(OP)
From a PSV evaluation, it was determined that there are no applicable relief cases associated with a couple of PSV installed at the discharge line of a couple of small sampling pumps at a Blender system. From the study it was recommended to remove the PSV's from service. However, in order to still have "pump protection", engineering wants to leave PSV's in place and change their equipement name/label from PSV to PV. Is this a normal practice? Can it be done? Is there a regulation to refer to?





RE: PSV label changed to PV
If PV is to prevent pump or piping overpressure, then there should be a PSV.
--Mike--
RE: PSV label changed to PV
But all of this has been abandoned for nearly 20-years.
The standards are API-674, API-675, API-676.
If you want to follow API, you'll need an external PSV regardless how small the pump.
There are exclusions when using steam of Air for motive power which can be self limiting.