pressure relief valve on NG pipeline
pressure relief valve on NG pipeline
(OP)
Hello for all
I have 10 km length nat. gas pipeline. My question : Is it important to put PRV on it. and how can I know where it is will be and, is one PRV is enough or not.
Thaaaanks
I have 10 km length nat. gas pipeline. My question : Is it important to put PRV on it. and how can I know where it is will be and, is one PRV is enough or not.
Thaaaanks





RE: pressure relief valve on NG pipeline
This could mean no Pressure Relief Valve, one at the inlet, one at the outlet or any version inbetween.
It is not normal to place any PRV at any intermediate point.
your question has few details, so unfortunately so does the answer....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: pressure relief valve on NG pipeline
Engineering practice has long been to either write procedures to prevent isolating a launcher/receiver barrel that could be liquid full or to place thermal relief on them. A couple of barrel failures caused regulators to step up and write confusing/conflicting regulations that require protection against a (usually) non-existent scenario of overpressure in gas.
There is no piping code that requires over-pressure protection for natural gas pipelines, and the emerging requirements to put protection on launchers/receivers are sort of assuming that the barrel is isolated from the pipeline.
David Simpson, PE
MuleShoe Engineering
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei, Italian Physicist
RE: pressure relief valve on NG pipeline
Please what is the data which is used to specify the numbers of PRV's
RE: pressure relief valve on NG pipeline
Once you determine the size and the number of PSV's, you need to see where the discharge stream will be released. Unless you are by a miracle allowed to vent 10km pipeline to atmosphere, you would need a dedicated relief system. If the pipeline is linked to a compressor station (whether upstream or downstream), this will likely be the best place to locate the PSV.
Dejan IVANOVIC
Process Engineer, MSChE
RE: pressure relief valve on NG pipeline
This is normally only about what happens if the end is shut in and the input pressure can exceed the design pressure.
otherwise you don't normally need PRVs on a gas pipeline.
you haven't given out any details so the answer has few details....
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: pressure relief valve on NG pipeline
RE: pressure relief valve on NG pipeline
B31.8 code allows the use of an an instrumented safeguarding system (without PSV) of a certain integrity and configuration to allow a design pressure break, provided the hydrotest(??) pressure of the protected downstream component is in excess of the upstream components max operating pressure. My language may be a little loose here, and perhaps a pipeline engineer may correct me, but this is the general hang of it.
Your perception of the use of PSV when dealing with design pressure breaks is what is used in ANSI B31.3, so pls check if this pipeline is a B31.8 or a B31.3 line.
RE: pressure relief valve on NG pipeline
RE: pressure relief valve on NG pipeline
RE: pressure relief valve on NG pipeline