Pressure relief device requiements for two pressure vessel in the same

[deckie1026]

Section VIII Div 1 question:

Is it permissable to have a single pressure relief device for two pressure vessels in the same system ? Pressure relief device and piping are sized with the corect capacity to provide required over pressure protection.

 

[pennpiper]

I suspect that there is a block valve between vessel "A" and the PSV and another block valve between vessel "B" and the PSV.
If this is so then you cannot (or should not) do it.

 

[lizking]

There are quite a few stipulations regarding this situation. Refer to Appendix M of Sect. VIII, Div. 1.