Good pipe flow calculators include an orifice flow calculator, an air flow calculator and a compressible gas flow calculator. Two of these calculators measure how well the substance inside the pipe flows through it, and the other determines where the measurement is taken.
The orifice flow calculator measures the flow rate of a substance by using the orifice plate as a tool. It takes a pressure drop for this calculator to work correctly.
The air flow calculator measures the amount of air found in a closed pipe. This calculator determines if the flow rate is different at the beginning and end of the pipe.
A compressible gas flow calculator measure any type of gas found in a closed pipe. This calculator helps determine how much gas needs to flow in a pipe for the control regulator to work properly.