need to know if inspection is mandatory by any code if PSV has opened
need to know if inspection is mandatory by any code if PSV has opened
(OP)
Is there any code in which there is a mandatory inspecting action on a PRdevice which has opened in an overpressure event?
Changing words:
If a PSV has opened and reclosed because of an overprerssure event, shall it be inspected inmediatly? which, if any, standard or code says something about this matter?
Thanks a lot
Daniel





RE: need to know if inspection is mandatory by any code if PSV has opened
RE: need to know if inspection is mandatory by any code if PSV has opened
RE: need to know if inspection is mandatory by any code if PSV has opened
If your PR operates find out why. One day it may fail to operate and then you will really have a problem. Dont rely on Codes when a disaster happens. It is not a defence to say "there is no code that required me to investigate such a fault" so I didnt.
Geoffrey D Stone FIMechE C.Eng;FIEAust CP Eng
www.waterhammer.bigblog.com.au
RE: need to know if inspection is mandatory by any code if PSV has opened
I agree with above answers, ...but two main other points:
If you are generally speaking of PR devices, there will be components and solutions where it will be required from the component type to inspect and replace or reset.
For instance
a) If bursting discs are placed before PRVs or acting alone.
or
b) If air/actuated valves are used as pressure relief valves are released and equipped with solenoid valves with manual reset.
Conclusion I: Special safety devices may be selected that normally will require inspection and reset. Such solutions can be required by process or are selected as a safety measure from the environmental (in- and outside factory) safety side.
Conclusion II) Environmental and general safety requirement and regulations might always override the factory / pipeline / component regulations.
Then as the others have answered: back to basic, you have to use common sense!
RE: need to know if inspection is mandatory by any code if PSV has opened
There might be separate concerns about inspecting the pressure safety valve versus inspecting the piping and any equipment associated with the system.
The piping system would normally have been subjected to a hydrotest at 1.5X design pressure. A relief event at a pressure 1.10X design pressure would not seem as severe.
Relief valve bodies would be subject to same 1.5X hydrotest in manufacturing. The set pressure would be some fraction of the body rating. So that might be why there does not seem to be Code requirements for re-inspection after relief.
There would be operations reasons for preventing a re-occurence of a relief event, if considered as a spill.
RE: need to know if inspection is mandatory by any code if PSV has opened
NBIC is post construction and does address i servic inspection. However, there is no requirement to inspect or test a Pressure Relief Valve following a lift.
By the way, ASME Pressure Relief Valve bodies are not necessarily hydrostatically tested to 1.5 times pressure rating. The 1.5 hydro is for primary pressure zone parts (Disc & Nozzle)which are cast or welded. Secondary Pressure Zone Parts (Body & Bonnet) require a 30 psi Minimum Back Oressure Test if the PRV is designed for discharge into a closed system.
JAC
RE: need to know if inspection is mandatory by any code if PSV has opened
RE: need to know if inspection is mandatory by any code if PSV has opened
JAC