【正文】 the continuous operation and one cargo loading capacity. 4. It is remended that the number of storage days for the fuel oil to be used by the plant itself be 3 days, and the number of storage days for the fuel oil purchased outside be defined with reference to Table 1. Number of storage days for the petrochemical feedstock and product oils shall ply with the following specifications. 1. It is suggested to define the number of storage days for main feedstock according to Table 1. Table 1 Number of Storage Days for Main Feedstock Ways of delivery to plant No. of storage days Remark Pipeline delivery 7 ~ 10 Railway transportation 10 ~ 20 Inland waterway and offshore water transportation 10 ~ 20 Total capacity of tanks shall satisfy the continuous operation of plant and one cargo discharge capacity. Road transportation 7 ~ 10 Notes: ? In case of the ocean transportation, the number of storage days should not be less than 30 days but should not be more than 60 days. ? Number of storage days for the feedstock with special characteristics of high polymerization, high oxidation, etc., shall be defined according to the actual conditions. 2. Number of storage days for the intermediate feedstock should be determined according to Table 2. Table 2 Number of Storage Days for Intermediate Feedstock Categories of feedstock Number of storage days Feedstock of units to be started up and shutdown for maintenance simultaneously and that between units of plex plan 3 ~ 4 Feedstock between units of the plex plant which are not started up and shutdown for maintenance simultaneously 15 ~ 20 Feedstock between units that are not started up and shutdown for maintenance simultaneously 10 ~ 15 3. Number of storage days for petrochemical products should be determined according to Table 3. 4 Table 3 Number of storage days for petrochemical products Designation of medium Delivery way from plant Number of storage days Parrafines Pipeline delivery 5 ~ 8 Railway transportation 10 ~ 20 Inland waterway and offshore water transportation 10 ~ 20 Road transportation 10 ~ 15 Olefins Pipeline delivery 5 ~ 8 Railway transportation 8 ~ 12 Inland waterway and offshore water transportation 10 ~ 15 Road transportation 10 ~ 15 Naphthenes Railway transportation 7 ~ 10 Inland waterway and offshore water transportation 10 ~ 15 Road transportation 10 ~ 15 Alcohols, aldehydes, esters, ketones, nitriles, etc. Railway transportation 15 ~ 20 Inland waterway and offshore water transportation 20 ~ 25 Road transportation 10 ~ 15 Notes: ? In case of the ocean transportation for delivery the product from the plant, the number of storage days should not be less than 30 days but should not be more than 60 days. ? For the delivery ways of inland waterway, offshore water and ocean transportation, the capacity of tanks shall satisfy the requirements for the continuous operation of plant and one cargo loading capacity. Number of storage days for acids, alkalis and liquid ammonia shall be defined according to Table . Table Number of Storage Days for Acids, Alkalis and Liquid Ammonia Designation of medium Ways of transportation Number of storage days Acids and alkalis Railway transportation 15 ~ 25 Inland waterway and offshore water transportation 20 ~ 30 Road transportation 10 ~ 15 Liquid ammonia Pipeline delivery 7 ~ 10 Railway transportation 10 ~ 20 Road transportation 10 ~ 15 Note: The capacity of tanks shall satisfy the requirements for one cargo loading or unloading capacity. When defining the capacity of tanks, it is necessary for the calculated daily storage capacity for various media to satisfy the following provisions: 5 1. The daily storage capacity for various media shall be calculated according to the annual handling capacity specified for the general process flow of whole plant or the annual output for the whole plant. 2. The daily storage capacity of feedstock and intermediate feedstock shall be the average daily feed capacity of the number of operating days for the unit. 3. Daily storage capacity of the product oils for refinery under continuous operation shall be the daily average output value based on the 365 days of operation. 4. Daily storage capacity of the products for petrochemical plant under continuous operation shall be the daily average output value based on the number of operation days for the corresponding unit. The loading capacity coefficient of storage tanks shall ply with the following provisions: Fixed roof tanks and inner floating roof tanks When the volume of tank is ? 1000 M3, shall be taken as the charging capacity factor. When the volume of tank is 1000 M3, shall be taken as the charging capacity factor. The loading capacity coefficient of shall be taken for the floating roof tanks. The loading capacity coefficient of shall be taken for the spherical tanks and horizontal tanks. Selection of tanks The floating roof tanks or inner floating roof tanks shall be selected for oils of crude oil, gasoline, solvent oil etc. The inner floating roof tanks shall be selected for aviation gasoline and jet fuel, and may also selected for lamp kerosene. The fixed roof tanks shall be selected for diesel oil, lubeoil, oils for electric appliances, hydraulic oil, heavy oil (fuel oil) and the other oils with the similar characteristics. The spherical tanks or horizontal tanks shall be selected for liquid hydrocarbon, light gasoline (from forerunning point to 60 oC) and pentane stored under normal temperature. The inner floating roof tanks or fixed roof tanks or horizontal tanks may be selected according to the specific conditions for aromatics, alcohols, aldehydes, esters, ketones, nitriles and the other media with the similar characteristics. It i