Pipe flow velocity
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I have a question: There is nitrogen at 0.6 MPaG in a storage tank, connected to a DN20 pipe that is 100 meters long; the outlet of this pipe is open to the atmosphere. How can I calculate the gas flow velocity at the outlet of the pipe?
What is the discharge rate per hour? There is no concept of volume; only pressure and pipe diameter are available, so it’s impossible to calculate the exit flow velocity
Calculating the flow velocity is meant to determine the flow rate
Generally, one should first determine the flow rate, and then use that flow rate along with the flow velocity to decide on the pipe diameter. I’m not sure why you’re doing it in reverse
A pressure difference exists at both ends of this tube, which can be estimated using the formula for fluid friction.