Deluge systems, determination

Determine the water requirement (gpm) and number of nozzles for a deluge system required to protect a 10,000-gal storage tank that has a diameter of 15 ft. Use 0.5-in nozzles with a nozzle pressure of 35 psig, and assume that the vessel contains a reactive solvent. 

Ideally most oil or gas incidents will be controlled by the process shut down systems (ESD, depressurization, drainage, etc.) and hopeful the fire protection systems (fireproofing, water deluge, etc ), will not be required. However these primary fire defense systems may not be able to control fire incidents if previous explosions have previously occurred. Before any consideration of fire suppression efforts, explosion effects must first be analyzed to determine the extent of protection necessary. Most major fire incidents associated with hydrocarbon process incidents are preceded by explosion incident. 

Has deluge water overflow from containment systems been determined and reviewed properly ... 

Testing of firewater distributions systems is performed to determine if the condition of the system is adequate to support a worst case credible event (WCCE) need for firewater. The condition of the piping, leaks, existence of closed valves or sediment, operability of valves for firewater delivery systems (sprinklers, deluge, hose reels, monitors) should be determined annually, but at a minimum every 5 years (NFPA 25, Chapter 7). 

---