PSV Inlet pressure drop question
PSV Inlet pressure drop question
(OP)
If I'm installing a PSV on a steam header and have a CV Fail open case is the 3% rule calculated from the header to the inlet of the PSV or from the CV on the header?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
PSV Inlet pressure drop question
|
RE: PSV Inlet pressure drop question
"When a pressure-relief valve is installed on a line directly
connected to a vessel, the total non-recoverable pressure loss
between the protected equipment and the pressure-relief
valve should not exceed 3 percent of the set pressure of the
valve except as permitted in 4.2.3 for pilot-operated pressure relief
valves. When a pressure-relief valve is installed on a
process line, the 3 percent limit should be applied to the sum
of the loss in the normally non-flowing pressure-relief valve
inlet pipe and the incremental pressure loss in the process line
caused by the flow through the pressure-relief valve."
Does this help?
Good luck,
Latexman
Technically, the glass is always full - 1/2 air and 1/2 water.
RE: PSV Inlet pressure drop question
--Mike--