This document provides technical information about pipe friction factors, Manning numbers, and pressure losses for polyethylene and polypropylene pipes of various diameters. It includes a flow monogram that lists the average water quantity, flow velocity, and pressure loss for different pipe diameters from 35 mm to 100 mm. Additional pressure losses that must be added are also specified for elbows, tees, reducers, and bends in the piping depending on the radius of the elbow.

1. H
TECHNICAL INFORMATION
P,ipc"f ti6]n.l:fioffiC,Fffi
For a straight length of pipe, the Hazen William friction factor "C" is 150 Manning number is 0.009
For the average calculation of Q, V and AH the following flow monogram applies for Polyethylene (PE) and
Polypropylene (PP) based on water at 10 'C
lnside diameter of pipe
Water quantity
D
o
(l s')
(mm)
Flow Velocity
V
Pressure loss
s')
(mws.1oomr)
(m
AH
0,03
35
0,10
0,04
0,10
0,15
-
0,05
0,2
0,3
0,4
60
0,5
0,15
0,20 -
0,10
0,15
1,0
70
0,30
-
1,5
80
2,0
0,40
90
3,0
0,50
100
4,0
5,0
0,20
0,30
0,40
0,50
10
1-
15
20
30
40
50
1
{
2-
1,5
1,5
2
100
150
200
300
400
500
345-
10-
3
4
5
10
15
20
20-
At average flow velocity the following values must be added per elbow 90' tees and reducer up to
of pipe, per elbow R = 1.5 D, approx.S m of pipe, per elbow R = D, approx. 10 m of pipe
rrif;
lrur-rorfitJ fi.6.1#r{
0r;'o
',rHAl'AsiA P.a. eiee co,, uro' 6rnaluuo;
30
20