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Number of chamber in vertical storage tanks

Question asked by jfacevedob on Nov 9, 2017
Latest reply on Nov 11, 2017 by nocivus

Hello. A customer of mine is asking me to increase the number of foam chamber in a vertical storage tank, using 4 foam chambers instead of 2 required per NFPA 11 and the manufacturer recommendation, using the same total flow (i.e. if it is required 500 gpm "250 gpm in each foam chamber” (2x250 gpm = 500 gpm), they recommend 125 gpm in 4 foam chambers (4x125 gpm = 500 gpm)). Due to before I wonder if the use of a bigger number of chambers have a negative effect in the fire extinguishment.