I have been asked to design storage capacity for propylene for 2 days storage production capacity. It works out to be 4 bullets of 500 m3 each (14' x 140' each)

In case of fire a relief to existing flare header (24" header, sufficient stack height) is suggested. Appreciate any hint on how I can find the fire load (kg/h)

This will lead to a suitable PSV size

Thanks