Flow rate calculation
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Knowing the pressure and pipe diameter, how to calculate the pipe flow velocity
The pipe flow velocity is related to the flow rate and the pipe cross-sectional area
There’s a formula in fluid mechanics, called the Bernoulli equation, right?
Knowing the pipe diameter and pressure isn’t enough to calculate the flow rate; you need to know the flow rate and the pipe diameter as well.
By finding the pump’s energy curve under pressure, the flow rate in the pipeline can be roughly estimated. The flow velocity can be calculated from the flow rate and pipe diameter.
The chemical process design manual contains tables of flow rates for commonly used materials; look them up, check the pressure ranges, estimate a value, and then use it in the flow rate equation
Based on flow rate and pipe diameter, the flow velocity can be calculated as flow rate / (0.785 × diameter squared)
It’s impossible to calculate. If you want to estimate the flow rate without taking measurements, list all the data you know and see if it’s possible to make an estimate
Tube of 80, length 200 meters, differential pressure 20 kPa
It’s impossible to estimate – what kind of medium is it, are there valves in between, and what is the pressure?