Each example was solved using a calculator and the example solution shown was obtained by simply entering known quantities into the calculator, selecting units of measure and type of calculation.

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... velocity in corresponding fields in the calculator and click calculate button to get results. ... Task: Calculate the pipe diameter if the water flow velocity is ...

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where is: D - internal pipe diameter; q - volumetric flow rate; v - velocity; A - pipe cross section area.

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Important: File with the solution for this task can be opened with Pipe flow calculator which you can download separately here:

Gravitypipeflow calculator

Pipe diameter calculator allows you to calculate pipe diameter for known fluid flow and flow rate, as well as stream speed for known pipe flow and diameter. The calculator also allows conversion between volume and mass flow. With the help of a calculator you can calculate the volume flow of an ideal gas at different pressures and temperatures.

On the right side you can find three examples showing how you can calculate the pipe diameter if fluid flow and flow rate are known.

When, instead of the volume flow, the mass flow rate and the desired fluid flow rate are known, the internal diameter of the pipe can be determined as follows:

Task: Calculate the diameter of the carbon dioxide pipe with a flow rate of 10 kg/h and a velocity 2 m/s at a pressure of 7 bar absolute and a temperature of 20 °C.

In the case where the desired mean velocity of the fluid flow is known as well as the required volume flow through the pipe, the inner diameter of the pipe can be calculated according to the following:

In order to find a solution to your fluid flow problem, you need to download the calculator and open the solutions you can download here.

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Pipe velocity

Task: Calculate the pipe diameter if the water flow velocity is 1 m/s and the flow rate is 5 lit/min

The examples presented and their solutions are intended to present the possibility of calculator application in solving fluid flow problems in pipes.

The velocity of fluid flow is calculated as the ratio between the flow of fluid and the cross-sectional area of ​​the tube. The magnitude calculated in this way is the mean value of the fluid velocity. The actual velocity of the fluid in the pipe is not uniform across the cross-sectional area. The velocity of fluid flow is greatest in the axis of the pipeline, and is equal to zero at the point of contact between the fluid and the pipe wall. The mean velocity of fluid flow can be calculated as follows:

Task: Calculate the airflow velocity if the inner diameter of the pipe is 50 mm and the flow rate is 100 m3/h at a pressure of 3 bar absolute and a temperature of 15 °C