PREMANT district heating pipe

Pressure drop chart

PRE 6.200

Water temperature 80 °C

Surface roughness e = 0.045 mm

(1 mmWS = 9.81 Pa)

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344.4 mm 312.7 mm

(DN 350)

(DN 300)

263.0 mm

(DN 250)

210.1 mm

(DN 200)

17.1.2025 BGP

Subject to technical changes

50

100

5

10

20

30

50

100

200

300

500

mmWS/m

Pressure loss ∆p

200

300

500

1000

2000 3000

160.3 mm

(DN 150)

132.5 mm

(DN 125)

107.1 mm

(DN 100)

82.5 mm

(DN 80)

70.3 mm

(DN 65)

54.5 mm

(DN 50)

43.1 mm

(DN 40)

37.2 mm

(DN 32)

29.1 mm

(DN 25)

21.6 mm

(DN 20)

5000 Pa/m

Q·860

m ̇ =

Flowrateinkg/h

m

̇ ≈

∆ T

Q =

P

o

w

e r r

e q u i r

e m e n t i n k W

∆T =

Temperature difference, VL(flow)/RL(return) in °C

W

a

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v

e

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F

l

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[

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]