Article: Arrangement of discharge piping from Pressure Relief Valves

[malarfra]

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[izadi]

Hi
Upward slope is not allowed for PSV discharge line. if the outlet is supposed to discharge to a elevated header, you should put the PSV at an elevation higher than the header but be careful about pressure-loss of PSV inlet line. It should be less than 3% of inlet pressure also consider liquid head in PSV inlet.

[inconel]

Thanks