Flow rate calculation
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The inner diameter of the oxygen pipeline is 200 mm, the medium pressure is 5 Mpa, and the flow rate is 40,000 Nm/h. What is the flow velocity?
Flow rate = Volumetric flow rate / Pipe cross-sectional area
Calculate the actual volume V based on temperature and pressure, then use V/A (the cross-sectional area of flow); A = 0.785*0.2*0.2 = 0.0314 m2
This can only be estimated roughly; using the ideal gas law, PV=nRT, the flow rate under the given conditions is determined, and then the velocity is calculated using Q=SV
I feel that the operating temperature is still missing
First, determine whether the flow rate is at operating conditions or under standard conditions; if it is under standard conditions, it needs to be converted to those conditions. Then the flow rate = volume flow rate/area. Make sure the units are consistent: when the flow rate is in m3/h, the cross-sectional area should be expressed in ㎡, and the result will also be in m3/h; this represents an ideal situation