Seeking advice on the design of water storage capacity for production reservoirs

The capacity of the fire water tank should meet the requirements for the total amount of fire-fighting water needed, both indoors and outdoors, throughout the duration of a fire. 　　The fire duration for residential areas, factories, and Class D and E warehouses should be calculated as 2 hours ； The fire duration for warehouses storing Class A, B, and C materials, flammable gas storage tanks, and open-air stockpiles of coal and coke should be calculated as 3 hours ； For open or semi-open storage areas of flammable and combustible materials (excluding open storage areas for coal and coke), the calculation should be based on 6 hours ； The duration of fire in Class A, B, and C liquid storage tanks shall be determined in accordance with regulations ； The fire duration of liquefied petroleum gas storage tanks shall be determined in accordance with regulations ； The duration of automatic sprinkler system operation is calculated as 1 hour ； 　　II. When continuous water supply can be ensured in case of a fire, the capacity of the fire water tank can be reduced by the amount of water supplied during the duration of the fire. If the capacity of the fire water tank exceeds 1000 m3, it should be divided into two separate tanks ； 　　III. The time required to refill a fire water tank should not exceed 48 hours; however, in areas with water shortages or in separate oil storage facilities, this period can be extended to 96 hours ； 　　IV. The protection radius of a fire water tank intended for fire trucks to draw water from should not exceed 150 m ； 　　V. Fire water tanks intended for use by fire trucks should be equipped with water intake ports, and the distance between these intake ports and buildings (except pump rooms) should not be less than 15 meters ； The distance from storage tanks for Class A, B, and C liquids should not be less than 40 m ； The distance from liquefied petroleum gas storage tanks should not be less than 60 m. If protective measures are in place to prevent radiant heat, this distance can be reduced by 40 m. The fire water tank used for fire trucks must ensure that the suction height for the fire trucks does not exceed 6 m ； 　　VI. Pools that combine fire-fighting water with water for production and domestic use shall be equipped with technical facilities to ensure that the fire-fighting water is not used for other purposes ；