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Table Losses same for all
Controlled ID thermoplastic pipe.
PRESSURE LOSS
C = 140ALL CONTROLLED ID PE PIPE
Pipe Sizes: NominalLosses per 100 ft: lb/in2
gpm1/2 in3/4 in1 in1-1/4 in1-1/2 in2 ingpm2 in2-1/2 in3 in4 in6 in
10.4480.1240.0380.0100.0050.0011057.763.271.140.3030.041
21.76.448.138.036.017.0051103.561.24.330.045
33.720.948.293.077.036.0111153.871.34.358.049
46.341.61.498.131.062.0181204.181.45.388.053
59.582.440.753.198.094.0281254.511.57.418.057
613.423.421.06.278.131.0391304.851.69.449.061
717.854.541.40.370.175.0521355.201.81.482.066
822.855.821.80.473.224.0661405.561.93.516.070
928.427.232.23.588.278.0821455.942.06.550.075
1034.538.792.72.715.338.1001506.322.200.5860.080
1110.483.240.8530.4030.1191602.48.660.090
1212.323.801.00.473.1401702.77.738.101
1314.284.411.16.549.1631803.08.821.112
1416.385.061.33.629.1871903.40.907.124
1518.615.751.51.715.2122003.740.997.136
1620.976.481.71.806.2392104.091.09.149
1723.467.251.910.901.2672204.461.19.162
188.062.121.00.2972304.851.29.176
192-1/2 in8.902.341.11.3282401.40.190
200.1529.792.581.220.3612501.510.205
22.18111.683.071.45.4312601.62.221
24.21313.723.611.71.5062701.74.237
26.24715.914.191.98.5872801.86.253
28.28318.244.802.27.6732901.98.270
30.3225.462.58.7643002.11.288
32.3636.152.90.8613252.45.333
34.4066.883.250.9643502.81.382
36.4517.653.611.073753.19.435
38.4993 in8.453.991.184003.600.490
400.5480.1919.294.391.30425.548
42.600.20910.174.801.42450.609
44.654.22711.085.241.55475.673
46.710.24712.045.681.69500.740
48.768.2676.151.825500.883
50.828.2886.631.976001.04
52.891.3107.132.116501.20
540.955.3227.652.277001.38
561.02.3558.182.438001.77
581.09.3794 in8.732.599002.19
601.160.4030.1089.292.761000
621.23.429.1149.882.931100
641.31.455.12110.473.111200
POLYETHYLENE (PE) PLASTIC PIPE
The pressure loss table for PE pipe is used for all
controlled (IPS) ID PE pipe (both SDR and Schedule
wall) since the ID for each nominal size is the same for
all types. In accordance with general practice, the
Standard ID dimensions (without tolerances) were used
as the average ID for computing pressure losses
because tolerances are both plus and minus.
There is some disagreement as to the "C" factor that
should be used when computing pressure losses in PE
pipe and tube. Then claim that PE is as smooth internally
as PVC is disputed by some technicians. Also, many
feel that because of its flexibility, when the pipe is
bowed during installation and due to the weight of
backfill, the circumferential orientation is forced out-of-
round sufficiantly to affect carrying capacity. Therefore,
only "140" was used as the "C" fator in preparing the
pressure loss table for PE pipe.
A multiplying factor is listed in one of the campanion
tables to determine loss in controlled (IPS) OD, SDR
11 PE pipe. For all other contolled (IPS) OD, SDR and
Schedule Wall PE pipe, use the PVC pipe pressure
loss table for the same SDR or Schedule wall (ID's are
same). Before using a pressure loss in a PVC loss
table, convert the listed loss to the equivalent of
C = 140.
Caution should be exercised to control velocities in PE
pipe to avoid damage from pressure surging (water hammer).
Note: The PE pressure loss table can be used for any
controlled ID thermoplastic pipe.
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