Provisions of GB50016 regarding fire separation distances for oxygen tanks

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For example, when considering the fire separation distance between an oxygen tank with a capacity of 300 m3 and a power distribution station, should we choose V=300 or V=300P? “Note: 1 m3 of liquid oxygen is equivalent to 800 m3 of gaseous oxygen under standard conditions. ”Which main sentence is this sentence explaining? 4.3.3 The fire separation distances between oxygen storage tanks and buildings, other tanks, and storage areas shall comply with the following provisions: 1 The fire separation distance between wet-type oxygen storage tanks and buildings, other tanks, and storage areas shall not be less than the values specified in Table 4.3.3 ； 2 The fire separation distance between oxygen storage tanks shall not be less than 1/2 of the diameter of the larger adjacent tank ； 3 The fire separation distance between oxygen storage tanks and flammable gas storage tanks shall not be less than the diameter of the larger adjacent tank ； 4 The fire separation distance between the oxygen storage tank and its oxygen production plant can be determined according to the process layout requirements ； 5 For oxygen storage tanks with a volume of 50 m3 or less, there is no requirement for a fire separation distance from the building in which they are used ； 6 The fire separation distances between oxygen storage tanks with fixed volume and buildings, tanks, and stockyards shall not be less than those specified in Table 4.3.3. Table 4.3.3 Fire protection distances between wet oxygen storage tanks and buildings, tanks, and storage yards (m)
Name, Total volume of wet oxygen storage tank, V (m3): V ≤ 1000, 1000 < V ≤ 50000, V > 50000; Liquids of Class A, B, and C; Storage yards for flammable materials; Warehouses for Class A items; Outdoor substations and distribution stations: 20.0, 25.0, 30.0; Civil buildings: 18.0, 20.0, 25.0; Other buildings: Fire resistance rating – Grade I and II: 10.0, 12.0, 14.0; Grade III: 12.0, 14.0, 16.0; Grade IV: 14.0, 16.0, 18.0. Note: The total volume of fixed-volume oxygen storage tanks is calculated as the product of the geometric volume of the tank (in m3) and the design storage pressure (absolute pressure, in 10^5 Pa). 4.3.4 The fire separation distances between liquid oxygen storage tanks and buildings, other tanks, and storage yards shall comply with the provisions on fire separation distances for wet oxygen storage tanks of corresponding capacity specified in Article 4.3.3 of this code. The distance between the liquid oxygen storage tank and its pump room should not be less than 3.0 m. The fire separation distance between liquid oxygen storage tanks with a total volume of 3 m3 or less and the building in which they are used shall comply with the following provisions: 1 When located in a dedicated building with a fire resistance rating of Class I or II, the fire separation distance shall not be less than 10.0 m ； 2 When installed in a separate building with fire resistance ratings of Class 1 or Class 2, and separated from the side facing the building it serves by a firewall without any doors or windows, there is no limit on the required fire separation distance ； 3 When fire protection measures are taken for liquid oxygen storage tanks stored at low temperatures, the fire separation distance shall not be less than 5.0 m. Note: 1 m3 of liquid oxygen is equivalent to 800 m3 of gaseous oxygen under standard conditions.