Water spray system is commonly installed round the shell of the tank for its protection against
rise in temperature to cool the tank. The density of discharge is 6lpm/sq.mtr to 10.2lpm/sq.mtr
for tank shell round surface area and 3lpm/sq.mtr for tank top surface area. The detection of
temperature of the tank shell is achieved by quartz bulb detector place around the tank shell
or inbound temperature sensors in the tank.
Standard used for system design are NFPA 15, OISD 116 & API standards.