PSV vs rupture disc
PSV vs rupture disc
(OP)
Hi everyone!
Recently I have been involved in the design of a hydraulic circuit with heavy pumps. The prblem came when we studied the shut off case. In case of shut off the piping were not able to stand the pressure so we decided to install PSV valves. Normally, this is not a problem, but in this case, the flow to evacuate was so high that we (advised by several suppliers) had to install 8 PSV valves.
The question is, if it is possible to use rupture discs when if using PSV it is needed so many of them taking into account we are talking about big flows.
Flow l/min 174440
Set pressure barg 19
Back pressure barg 10
Is it ok regarding ASME?
Thanks in advance
Recently I have been involved in the design of a hydraulic circuit with heavy pumps. The prblem came when we studied the shut off case. In case of shut off the piping were not able to stand the pressure so we decided to install PSV valves. Normally, this is not a problem, but in this case, the flow to evacuate was so high that we (advised by several suppliers) had to install 8 PSV valves.
The question is, if it is possible to use rupture discs when if using PSV it is needed so many of them taking into account we are talking about big flows.
Flow l/min 174440
Set pressure barg 19
Back pressure barg 10
Is it ok regarding ASME?
Thanks in advance





RE: PSV vs rupture disc
RE: PSV vs rupture disc
Burst disc is only normally used when encountering something which has a very very low probability of occurring but high consequence. If this happens any time you come to a sudden halt, burst discs are not the answer. They are probe to accidental rupture, cannot be tested, degrade with age/corrosion and if the break need a shutdown to refit new ones.
You needed to look at all the options including up rating the pipework or using HIPPS or other instrumented systems, other surge relief devices such as accumulators before you determine which odds the best for your particular system.
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way
RE: PSV vs rupture disc
- I apparently ASME VIII allows the use of this kind of systems for vessel protection. Do you know if ASME 31.3 and 31.1 allows the use of HIPPS???
- In all cases I have found in the web, the final elementis a valve. Do you know if the final element can be a pump motor?? The idea is that if I have an overpressure, I switch off the pump.
Once again, thanks a lot.
RE: PSV vs rupture disc