How do we calculate?
SDR ↔ PN for PE100: SDR 26 = PN 6, SDR 17 = PN 10, SDR 11 = PN 16. Wall thickness = outside diameter ÷ SDR. The smallest outside diameter with a velocity not exceeding 1.5 m/s is selected; the loss is calculated with Darcy-Weisbach (roughness 0.007 mm, water at 15 °C).
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