Formulas for calculating gas flow velocity
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If the gas pressure, temperature, flow rate, and pipe diameter are known, how can the gas flow velocity be calculated? Use flow rate/diameter area directly? Should pressure and temperature still be considered?
The unit of flow rate must be converted to cubic meters per second; it is the volumetric flow rate under operating conditions, not the nominal value. This value is then divided by the cross-sectional area of the pipe (in square meters), with the unit of flow velocity being meters per second.
You can check the relevant manuals; generally, the formulas for calculation are included in them
Lao Yu on the 2nd floor is right. If you know the flow rate and the pipe diameter, simply dividing them gives you the flow velocity, right? One thing to note is that the gas flow rate, usually given in Nm3/h, needs to be converted to m3/h based on the actual temperature and pressure of the gas inside the pipeline; after that, by dividing by the cross-sectional area of the pipeline, the actual flow velocity can be determined.
Flow rate divided by cross-sectional area equals flow velocity
The Petrochemical Pipeline Installation Design Manual seems to have information on page 176. . .