How do you calculate the diameter of air compressor piping?

There are several main ways to calculate the pipe diameter of the air compressor pipeline:

Calculation based on flow rate: The diameter of the pipe can be calculated based on the flow rate used in the compressed air pipe and the permitted flow rate of the pipe. The calculation formula is as follows:

D = (4Q/πv)^0.5

Where D is the pipe diameter, Q is the flow rate, v is the flow rate, and π is taken as 3.14.

Calculation based on pressure drop: The diameter of the pipe can be calculated based on the design pressure of the compressed air pipe, the flow rate used, the length of the pipe and the permissible pressure drop. The calculation formula is as follows:

D = [(0.081QPL)/(ΔPπ)]^0.5

Where D is the pipe diameter, Q is the flow rate, P is the design pressure, L is the pipe length, ΔP is the permissible pressure drop, and π is taken as 3.14.

Empirical formula method: according to the empirical formula and the actual use of the selection of the appropriate pipe diameter. The general empirical formula is as follows:

D = 1.3×(Q/10 0)^0.5

Where D is the pipe diameter and Q is the flow rate.

In the actual calculation, it is necessary to select the appropriate flow rate according to the specific situation.

- Reference to relevant manuals and standards: Relevant information such as the Concise Power Piping Manual can be consulted to determine the pipe diameter according to the tables and data provided in the manual. This method is usually based on economic flow rates and practical experience, and can provide a more reliable reference.

The following factors also need to be considered when calculating the pipe diameter:

- Air compressor discharge volume and discharge pressure: these parameters affect the flow rate and velocity of the gas in the pipe.

- Pipe length and pressure drop requirements: Longer pipes may result in a larger pressure drop, and a suitable pipe diameter needs to be selected to reduce the pressure drop.

- Economic flow rate: Choosing the right flow rate can minimise pipeline costs while meeting flow requirements.

In practical application, in order to ensure the normal operation of the piping system, it is recommended to refer to the relevant manuals for calibration after calculating the pipe diameter and make appropriate adjustments according to the actual situation.