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[kirangparihar]

Hello everbody

I have designed a PSV for fire case for a huge horizontal vessel (Vol ~ 700 m3). And for 2 phase flow I got a big PSV orifice size!

Although, we do not consider time factor while calculating the fire load but revisiting the problem revealed that it would take near about 3 hours to reach the boiling temperature !!!.

Can I just not consider the thermal expansion of liquid & leave the vapour + liquid & then vapour loads for calculating the PSV since 3 hours should be enough with adequate fire fighting to control the fire.

Pl. comment

Best Regards

Kiran