Advice on how to move PSV discharge piping with PSV in service
Advice on how to move PSV discharge piping with PSV in service
(OP)
Howdy...I have a facility which has ammonia relief valve discharge piping that is well under 15 ft from the ground. The protected equipment includes, among other things, the primary suction header for the facility and it can't be easily taken out of service (has never been in 30 years).
I'm trying to find a safe, PSM compliant and realistic way to rework the piping. I'm nervous having pipefitters working on it while the relief could go off, more nervous about leaving the equipment unprotected but in service and it doesn't seem practical to have them in full level A suits to do the work.
Thanks for any advice....this re-instills the mantra in me:
"5 minutes spent now means 5 hours saved later"
I'm trying to find a safe, PSM compliant and realistic way to rework the piping. I'm nervous having pipefitters working on it while the relief could go off, more nervous about leaving the equipment unprotected but in service and it doesn't seem practical to have them in full level A suits to do the work.
Thanks for any advice....this re-instills the mantra in me:
"5 minutes spent now means 5 hours saved later"





RE: Advice on how to move PSV discharge piping with PSV in service
It is way beyond any inpsection frequency that I have heard of.
As for working on a live PSV- just dont do it!
RE: Advice on how to move PSV discharge piping with PSV in service
RE: Advice on how to move PSV discharge piping with PSV in service
RE: Advice on how to move PSV discharge piping with PSV in service
You wrote:
"They share a common discharge pipe and that is the issue."
What do you mean by this? What is the issue?
RE: Advice on how to move PSV discharge piping with PSV in service
How do I work on these discharge pipes to make them compliant? Taking the relief OOS means taking the equipment OOS and evacuating the ammonia. The facility in question doesn't take routine outages (annual or otherwise). In fact some of this equipment has been in service for 30 years and everything but the common discharge piping from the dual reliefs has redundancy installed to accommodate that (compressors, condensers, individual reliefs, even suction traps, thermosyphon receivers, etc, it can all be worked on safely while the rest of the facility is running).
RE: Advice on how to move PSV discharge piping with PSV in service
Bigger than 4", use a slip-on flange on the existing pipe. After it has the root welded, bolt on the new spool. Now they can 'undress'.
RE: Advice on how to move PSV discharge piping with PSV in service
RE: Advice on how to move PSV discharge piping with PSV in service
Assuming that you can turn the PSV's 90 degrees and they are still headed in a direction you want to go.
Regards
StoneCold
RE: Advice on how to move PSV discharge piping with PSV in service
RE: Advice on how to move PSV discharge piping with PSV in service
RE: Advice on how to move PSV discharge piping with PSV in service