9 3 2015 CALPEX district heating pipe CPX Subject to technical changes 1 205 Pressure loss chart Sanitary 10 bar Water temperature 60 C Surface roughness ε 0 007 mm PEXa 1 mmWS 9 81 Pa Q 860m T m Flow rate in kg h Q Power requirement in kW T Temperature difference VL flow RL return in C 63 45 6 mm DN 50 2 50 36 2 mm DN 40 11 2 40 29 0 mm DN 32 11 4 32 23 2 mm DN 25 1 28 20 0 mm DN 20 3 4 22 16 0 mm DN 16 5 8 M as s flo w ra te m kg h 30 C 20 C Pressure loss p Pa m 20 30 40 50 80 10 0 120 140 160 180 120 0 14 00 16 00 18 00 20 0 30 0 40 0 50 0 60 0 10 00 20 00 10 20 20 30 50 10 0 20 0 30 0 50 0 10 00 30 50 10 0 20 0 30 0 50 0 Q kW T 2 0 m s 3 0 m s 1 5 m s 1 0 m s0 75 m s 0 5 m s0 4 m s0 3 m s W ater velocity 300 500 1000 2000 3000 5000 10 000 20 000 30 000 40 000

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