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Psv Adequacy Check For Plant Capacity Increase

psv adequacy check

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#1 Shakil


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Posted 14 May 2019 - 06:05 AM

Hi all,

I am currently performing Study to operate our Plant at higher capacity than design.

Design Factor= 120 %

DBN Factor = 130%


During this study when I did Mass balance, I came to know that for 10 % increase in Flow capacity I have sufficient margin in Pump & also Same control Valves can be used with available margin.


Also for PSV having Governing case as Fire, the Wetted Surface remains same, hence no need to check adequacy.


As I will not Change any Pump Or Control valve for high capacity operation & the Fire Case also don't needs to be revaluated being same wetted surface, do I need to do  PSV adequacy check in this condition?


Your Quick reply will be highly appreciated.

#2 latexman


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Posted 14 May 2019 - 07:54 AM

What are you changing?

#3 Chemitofreak


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Posted 16 May 2019 - 01:38 AM

Hi Shakil,


Since, the flow in the system is changing, it is worth while to check all the non fire cases.



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