Calculation of safe flow velocity
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It is known that a flow rate of <3.5 m/s for Class A flammable and explosive liquids is considered safe; the diameter of the loading nozzle for methanol is DN80, and the loading rate is 60 T/h. Please prove that a loading rate of 60 T/h at this loading nozzle is within safe limits
If we do a rough calculation, your flow rate is almost 4.1 m/s
The flow rate of methanol should preferably be controlled at ≤3 m/s, and for a flow rate of 60 t/h, a pipe diameter of DN100 is recommended.
Calculate the flow velocity and compare it with the requirements of the standards
The flow velocity of the loading/unloading arm is higher than that of the normal process pipelines; a value can be selected by referring to oil depots or other specifications. The flow rate of flexibles is generally less than 4.5