nfcl, mangalore dap/npk plant feasibility study - Environmental ...

5ANNEXURE-IXFire Water Storage & PumpsPlant SitePart of raw water storage tank is considered as Fire Water storage & adequate capacity isconsidered to store fire water for the complex. The fire water will be exclusively used forfirefighting activity sufficient for four hours fire water supply at the maximum fire waterdemand. The proposed fire pump system designed in accordance with NFPA 20 / TAC isadequate to support the facilities in the plant. Jockey Pump is employed to maintainheaders at pressure around 10 kg/cm2 g. 50% of total fire water demand is met by theEngine driven pumps and 50% shall be met by the Motor driven pumps. Fire pumps will bedesigned for automatic sequential start upon loss of fire water main pressure. All the FirePumps will be UL Listed and / or FM Approved for fire protection service.Water HydrantsWater hydrants will be distributed in the process plant and in open spaces for accessibility.In the process area and the atmospheric storage tank yard, the maximum distancebetween hydrants will be 60 m, whereas in the utility and building areas the distance is 90m.Water spray systemManually operated water spray system designed as per NFPA15 will be provided for thehighly flammable liquid storage tanks. The water spray system for the storage tanks andvessels will be designed for manual operation by employing the gate valves in safelocation. The water spray system will be designed for automatic operation by employingthe fire detection system. Piping materials used in the water spray system will be carbonsteel.Fire Alarm SystemElaborate Fire Alarm System has been considered in cost estimate.