Pipe friction loss

Many factors affect pipe friction loss. The most significant is the diameter and the length of the pipe, but other factors such as the turbulence of the flow, the roughness of the pipe and any additional bends, joins or equipment such as valves, filters, venturis increase the head loss you need to account for. In the table, friction loss indications are shown on the y-axis flow rate in liters / minute, on the x-axis Pipe size in mm / inches based on the internal diameter..

 

 

 

 

 

 

 

 

 

Pipe friction loss - PVC & Polyethylene round pipes

Internal diameter pipe - inches / mm
Flow rate13mm20mm25mm32mm40mm50mm64mm75mm90mm100mm125mm150mm
Liters/min1/2"3/4"1"1"1/41"1/222"1/233"1/2456
307016.55.31.40.70.2------
40-2892.31.20.3------
50-42133.51.80.50.15-----
60-5818530.70.2-----
70-76246.530.90.20.1----
80--30841.20.30.16----
90--38951.50.450.23----
100--4611620.50.20.12---
125--7017930.80.30.180.1--
150---251241.20.50.20.14--
175---331661.50.60.330.18--
200---42217210.40.20.8-
250---6432102.81.20.60.30.12-
300----45144210.450.17-
400----78246.831.50.80.20.12
500-----3611531.50.50.17

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