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TUBE MANUAL

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Design tables for conduit systems<br />

Values are for orientation purposes only; subject to change<br />

Design of conduit systems<br />

When dimensioning a compressed air pipeline, the following items are particularly important:<br />

• A pressure decrease from 6 bar to 5 bar reduces the power of your machines and tools by up to 27%.<br />

• If the final compression pressure is increased by 1 bar to compensate for decreases in pressure, costs for operating<br />

power increase by 10%.<br />

• The following is essential for compressed air pipelines: the compressed air flow rate must remain between 5-10 m/s.<br />

• Apart from the straight pipeline sections, all pipeline fittings can be responsible for the pressure loss. Substitute pipeline<br />

lengths are specified for these pipeline fittings<br />

• Dimensioning of a closed circular pipeline takes half of the nominal length of the total closed circular pipeline and the<br />

entire compressed air requirement into consideration<br />

• At working overpressures above 7 bar, pressure loss in the pipeline is reduced<br />

• The design tables specify the respective outer diameters of the compressed air pipes because the article designations are<br />

also based on the outer diameter<br />

hndr Page 20.10.20082

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