Requirement for foam deluge system

Discussion created by iryna.seleznova on Nov 2, 2020
Latest reply on Nov 3, 2020 by nocivus

We create a design of a deluge foam system for the oil extraction plant.

NFPA 16 show density  6,5 mm/min. We used instead nozzle open sprinkler k 115.

According to NFPA 13

“ Minimum operating pressure of any sprinkler shall be 7 psi (0.5 bar)”

But if we use 0.5 bar we get density 9 mm/min and increase the volume of foam.

System get more expensive.

If are we using pressure on the end nozzle 0,26 - we get density 6,5 mm/min.

What is your opinion? can we use pressure 0,26 bar on the end nozzle

if it foam deluge system and we use open sprinklers