6.3 Dimensioning of the pipes

A compressed-air network consists of three different line levels:

- Main line:
It connects the compressed-air generation unit with the distribution network. The main line should be dimensioned in such a way that reserves exist for future extensions.

- Distributor:
It distributes the compressed air within the section of the consuming unit. It can be built both as a ring or stub line as well as also in combination of a loop line with integrated stub lines.

- Connecting line:
That’s the connection between distributor and consuming unit. The connection of the connecting line at the distribution point shall be led up out of the distribution to avoid the condensate leaking the pipe.

Correct planning of a compressed-air network influences directly the performance of the connected consuming unit and the costs of the production of compressed air.

The required diameter is determined in considering the required volume flow and the admissible pressure loss. The pressure loss from compressor to the most distant consuming unit should not exceed 0.1 b for a rigidly attached compressed-air network.

The connection components are critical issues within a compressed-air system. Coupling, hoses or servicing units can cause high losses if they have not been correctly designed. In addition, there are lots of connections that are located on a small space and could have leakages.