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Table Losses same for all




Controlled ID thermoplastic pipe.















PRESSURE LOSS













C = 140





ALL CONTROLLED ID PE PIPE













Pipe Sizes: Nominal                                                                                                  Losses per 100 ft: lb/in2
gpm 1/2 in 3/4 in 1 in 1-1/4 in 1-1/2 in 2 in gpm 2 in 2-1/2 in 3 in 4 in 6 in
1 0.448 0.124 0.038 0.010 0.005 0.001 105 7.76 3.27 1.14 0.303 0.041
2 1.76 .448 .138 .036 .017 .005 110   3.56 1.24 .330 .045
3 3.72 0.948 .293 .077 .036 .011 115   3.87 1.34 .358 .049
4 6.34 1.61 .498 .131 .062 .018 120   4.18 1.45 .388 .053
5 9.58 2.44 0.753 .198 .094 .028 125   4.51 1.57 .418 .057
6 13.42 3.42 1.06 .278 .131 .039 130   4.85 1.69 .449 .061
7 17.85 4.54 1.40 .370 .175 .052 135   5.20 1.81 .482 .066
8 22.85 5.82 1.80 .473 .224 .066 140   5.56 1.93 .516 .070
9 28.42 7.23 2.23 .588 .278 .082 145   5.94 2.06 .550 .075
10 34.53 8.79 2.72 .715 .338 .100 150   6.32 2.20 0.586 0.080
11   10.48 3.24 0.853 0.403 0.119 160     2.48 .660 .090
12   12.32 3.80 1.00 .473 .140 170     2.77 .738 .101
13   14.28 4.41 1.16 .549 .163 180     3.08 .821 .112
14   16.38 5.06 1.33 .629 .187 190     3.40 .907 .124
15   18.61 5.75 1.51 .715 .212 200     3.74 0.997 .136
16   20.97 6.48 1.71 .806 .239 210     4.09 1.09 .149
17   23.46 7.25 1.91 0.901 .267 220     4.46 1.19 .162
18     8.06 2.12 1.00 .297 230     4.85 1.29 .176
19 2-1/2 in   8.90 2.34 1.11 .328 240       1.40 .190
20 0.152   9.79 2.58 1.22 0.361 250       1.51 0.205
22 .181   11.68 3.07 1.45 .431 260       1.62 .221
24 .213   13.72 3.61 1.71 .506 270       1.74 .237
26 .247   15.91 4.19 1.98 .587 280       1.86 .253
28 .283   18.24 4.80 2.27 .673 290       1.98 .270
30 .322     5.46 2.58 .764 300       2.11 .288
32 .363     6.15 2.90 .861 325       2.45 .333
34 .406     6.88 3.25 0.964 350       2.81 .382
36 .451     7.65 3.61 1.07 375       3.19 .435
38 .499 3 in   8.45 3.99 1.18 400       3.60 0.490
40 0.548 0.191   9.29 4.39 1.30 425         .548
42 .600 .209   10.17 4.80 1.42 450         .609
44 .654 .227   11.08 5.24 1.55 475         .673
46 .710 .247   12.04 5.68 1.69 500         .740
48 .768 .267     6.15 1.82 550         0.883
50 .828 .288     6.63 1.97 600         1.04
52 .891 .310     7.13 2.11 650         1.20
54 0.955 .322     7.65 2.27 700         1.38
56 1.02 .355     8.18 2.43 800         1.77
58 1.09 .379 4 in   8.73 2.59 900         2.19
60 1.16 0.403 0.108   9.29 2.76 1000          
62 1.23 .429 .114   9.88 2.93 1100          
64 1.31 .455 .121   10.47 3.11 1200          













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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