Dear forum members
For determining fire case relief load for an Air Fan cooler API 521 section 4.4.13.2.8.4 has given below condition to consider bare tube surface as wetted area
(a) tube bundle height < 25 ft
( solid platform can sustain pool fire
© AFC outlet has control valve
In may case (LPG vapor to Liquid condensing) all above condition are met and accordignly required releif load comes out to be very very large when total bare ture surface area is considered as wetted area
Request the learned members in this forum to gude me if the approach is correct or i am missing something.
Thanks & regards