When installing fixed fire pumps in the process production units of petrochemical enterprises, how should the cooling area be determined? I don’t see any relevant regulations in the petrochemical industry standards either; does anyone have any advice?
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Based on the floor area of the process unit platform? Is it just the floor space occupied by large equipment, with a difference of several dozen times, or is it based on the external surface area of the equipment, like in the case of tanks?
This post was last edited by Shi Xiaodong on 2022-12-15 at 18:31. Clause 8.4 of the Petrochemical Regulations provides detailed specifications regarding fire-fighting water requirements. 1. First, determine the situations in which cooling water is necessary: When the tank on fire is a vertical storage tank, the adjacent tanks within a range of 1.5 times the diameter of that tank should be cooled； When the fire tank is a horizontal storage tank, the adjacent above-ground tanks within half the range of the sum of the fire tank’s diameter and length should be cooled ； When there are more than 3 adjacent vertical storage tanks, the cooling water volume can be calculated based on the fire-fighting water demand for 3 tanks ； When the fire tank is a floating roof or internal floating roof tank (except for tanks whose floating discs are made of fusible materials), the adjacent tanks do not need to be considered for cooling. 2. Regarding the cooling area: 8.4.5 includes a table; the water supply range in that table can be used to calculate the cooling area. 3. Regarding the cooling area for liquefied hydrocarbons, the cooling area for fire tanks should be calculated based on the surface area of their tanks ； The cooling area for adjacent tanks shall be calculated as half of the surface area of those tanks (Petroleum Industry Regulations 8.10). 4. For process facilities in plant areas with an area of 1 million m² or less, the fire-fighting water demand is calculated based on one fire incident. For plant areas larger than 1 million square meters, assume 2 fires occurring simultaneously, with one unit designated for the maximum water consumption and another for auxiliary water consumption. The amount of cooling water required for the device is calculated based on the area occupied by the protected objects.