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Psv On Long Lines

psv inlet line 3% pressure drop line sizing psv psv line size long line pressure drop

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#1 Nightwish


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Posted 03 June 2023 - 11:33 AM


When applying the  pressure drop of 3% Pset of PSV for sizing PSV inlet piping size, what is the distance that I have to consider? The example is below.



Case: control valve failure open.

PSV protects the piping of CV downstream that have lower design pressure from upstream portion.

Main line is 50m and PSV line is 10m. When calculating the pressure loss at PSV inlet piping what distance should I consider? 10m or 50+10=60m?


Thanks in advance


#2 breizh


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Posted 03 June 2023 - 08:29 PM

Hi, consider this link. Breizh
https://e2g.com/engi...re of the valve.

#3 shvet1


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Posted 04 June 2023 - 11:38 PM

see links in the link below 


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