PURPOSE OF DISCHARGE PIPE FOR PSV
PURPOSE OF DISCHARGE PIPE FOR PSV
(OP)
Dears,
I fall into interesting inquiry regarding the need to have discharge pipe for spring loaded PSV to atm. it is clear the need for discharge line for safety of personal, however, my question is regarding if the set point pressure is as low as 0.4 barg and the fluid is air with 30-40 degree C. is it also mandatory to have discharge pipe for this case, or for this case its not needed. please let me know if there are any other reasons that i didn't pay attention to.
excuse my question as I have search for an answer for this case but with no luck.
Thank you in advance.
BR,
Sager
I fall into interesting inquiry regarding the need to have discharge pipe for spring loaded PSV to atm. it is clear the need for discharge line for safety of personal, however, my question is regarding if the set point pressure is as low as 0.4 barg and the fluid is air with 30-40 degree C. is it also mandatory to have discharge pipe for this case, or for this case its not needed. please let me know if there are any other reasons that i didn't pay attention to.
excuse my question as I have search for an answer for this case but with no luck.
Thank you in advance.
BR,
Sager





RE: PURPOSE OF DISCHARGE PIPE FOR PSV
They can be very short, but unless they are a long way from anyone working or walking past, then they need to be guided to a safe location. The one below could be even shorter, but directs air to a safe place.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: PURPOSE OF DISCHARGE PIPE FOR PSV
RE: PURPOSE OF DISCHARGE PIPE FOR PSV
I don't know why anyone would do such a thing, but I wouldn't put it beyond the scope or reality. I've heard that in a bygone era at a plant I've been at that it is possible there was a leaking 'PSV' in steam service and the maintenance guy would use a screw driver to 'help' seat the valve.
RE: PURPOSE OF DISCHARGE PIPE FOR PSV
Per ISO, only the term Safety Valve is used regardless of application or design.
RE: PURPOSE OF DISCHARGE PIPE FOR PSV
Thank you
RE: PURPOSE OF DISCHARGE PIPE FOR PSV
If there is some risk of moisture accumulating at the low point of the discharge line, also add a normally open 1/2inch or 3/4inch valve at the BOP, else a weephole may do just as well.