Code for Fire Protection Design of Petrochemical Enterprises 5.5.7
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When starting on their first project, newcomers come across the fire protection design codes for petrochemical enterprises, specifically clause 5.5.7, which states that equipment classified as categories A, B, and C must be equipped with emergency discharge facilities for accidents, and these facilities must comply with the following requirements: 1. For equipment handling liquefied hydrocarbons or flammable liquids, it must be possible to discharge such substances from the equipment to a safe location; any remaining liquefied hydrocarbons must be discharged into a flare stack； 2 For combustible gas equipment, it should be possible to vent the combustible gas inside the equipment into a flare or a safe discharge system. I am currently working on an oil storage tank area. If we follow the requirements of these standards, it will take a very long time for tanks with a capacity of several thousand cubic meters to discharge their contents to a safe location in the event of an accident such as a fire. It seems like this approach doesn’t help much in combating fires And I didn’t see any requirements for emergency emission facilities in the process summary either
When a storage tank catches fire, it is generally impossible to extinguish the fire until all the material inside the tank has burned up. Only foam or water can be used to prevent the fire from spreading. To speed up fire suppression, it is necessary to release the contents in the tank through a discharge device.
The discharge system of the storage tank has only two liquid outlet ports, in addition to the inlet and outlet ports; the diameter of these outlets is 100. Is this really the discharge system?
A relief device is a general term for a system, and different requirements apply depending on the medium and type of tank.
The question is not clear; the medium, type of tank, etc., are not specified, so it’s difficult to resolve the issue
It’s a matter of understanding the regulations: the discharge from large storage tanks takes a long time, and it doesn’t serve any purpose in terms of fire prevention.