How to calculate the pipe diameter based on flow rate?
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The circulating water flow rate is 800 cubic meters per hour, the pressure is 3.5 kilograms (gauge pressure), the length is 100 meters, and there are two butterfly valves of the same diameter in the middle. How can the pipe diameter be determined?
Please check: http://bbs.hcbbs.com/viewthread.php?tid=84329&page=1#pid325828 – it should be helpful to you! Note: Posts from this forum.
First, estimate the resistance roughly, and then determine the flow velocity. If you’re not sure how to calculate it, you can use 1.5 m/s as a value for calculation purposes. I’ve done a rough estimate, and it seems that a pipe diameter of 450 mm would be necessary
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It can be calculated using Bernoulli’s equation; the key issue is to know what the pressure is behind pipe 100. Because it is the pressure difference that drives fluid motion, not the pressure itself.
First, you need to select an economical and safe flow rate based on your medium; then, flow rate/velocity equals the area through which the flow passes, which allows you to determine the pipe diameter. After that, you choose the actual diameter of the pipe according to the size of the existing pipes
It can be calculated using Bernoulli’s equation.
Basically, the diameter of the main pipe is calculated based on a water flow rate of 2~3 M/S