Why do liquefied propylene spherical tanks require fire water?

Fire water is used to cool down during fires.

I’m not sure if you mean connecting fire-fighting water to the bottom of the tank This is because there are many openings at the bottom of the tank; once a leak occurs, water rushes into the tank. Since water has a higher density than liquefied hydrocarbons, it settles at the bottom of the tank, and thus what leaks out is water. This is used for emergency handling.

The installation of fire-fighting water should comply with the relevant design specifications, and the reason for its installation is determined based on practical experience and safety considerations.

Sometimes, if there is a leak at the bottom of the tank, hydrocarbons and water can be injected to create a barrier for maintenance purposes. This is used in extremely special cases.

Hello, your question isn’t very clear； 1. If the fire-fighting water is installed on the outer wall of the spherical tank, it serves as a cooling spray; this is especially important during summer when high ambient temperatures cause an increase in pressure within the spherical tank, thereby preventing the safety valve from activating or the tank from experiencing overpressure ； Water needs to be sprayed for cooling at this time ； Or for use in emergency situations ； II. Installed on the material inlet and outlet pipelines of the spherical tank or at the pumps: In case of emergencies involving the spherical tank, such as leaks in the flange gaskets or manhole gaskets ； Water is pressurized and thus enters the tank, displacing the propylene inside so that the leak can be repaired ； Or, during the annual inspection of the spherical tank, the materials are replaced or maintenance is completed, and the air is replaced to meet the requirements for introducing propylene ； 、、、、、、

Under normal operating conditions outside the tank, it is used for cooling; in case of an accident, it can form a water curtain for isolation. The bottom of a spherical tank usually has a water injection line; in the event that the root valve is not sealing properly or there are other leaks, water can be pumped into the tank to prevent the leakage of liquefied hydrocarbons.

Everything said about the front part of floor 7 is correct, but the stuff about the back part isn’t! Your description of the fire-fighting water isn’t clear: 1. The fire-fighting water is connected to the coil on the tank wall, and it’s used with nozzles to cool the spherical tank during hot summer days ； 2. Connected to the pump’s inlet, entering from the bottom of the spherical tank; it is used in the event of an accident involving the tank! The replacement of the spherical tank is done using nitrogen; water is not used! !

Spherical tanks also use water to push things out, that is, they replace things with water. It’s just that the requirements for drainage are stricter now, so it’s less common