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Pressfit Piping - Friction Loss vs. Water Flow

Water flow friction loss in pressfit piping.

The tables below indicates friction loss for water flow through pressfit pipes Schedule 5 Carbon Steel Pipe or Type 304/304L and Type 316/316L Stainless steel pipe.

The pressure drop calculations are made with the D'Arcy-Weisbach Equation.

Nominal Pipe Size: 1/2"

  • Inside Diameter: 0.018 m (0.71 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1/2"
FlowVelocityPressure Drop
(m3/s)(liter/s)(US gpm)(m/s)(ft/s)(Pa/100m)(mmH2O/100m)(psi/100ft)(ftH2O/100ft)
4.0E-5 0.04 0.63 0.157 0.52 3289 335 0.145 0.34
5.0E-5 0.05 0.79 0.196 0.64 4818 491 0.21 0.49
6.0E-5 0.06 0.95 0.24 0.77 6629 676 0.29 0.68
7.0E-5 0.07 1.11 0.28 0.9 8813 899 0.39 0.9
8.0E-5 0.08 1.27 0.31 1.03 10963 1118 0.48 1.12
9.0E-5 0.09 1.43 0.35 1.16 13528 1379 0.6 1.38
1.0E-4 0.1 1.59 0.39 1.29 16701 1703 0.74 1.7
1.1E-4 0.11 1.74 0.43 1.42 19691 2008 0.87 2.0
1.2E-4 0.12 1.9 0.47 1.55 22817 2327 1.01 2.3
1.3E-4 0.13 2.1 0.51 1.68 26778 2731 1.18 2.7
1.4E-4 0.14 2.2 0.55 1.8 30217 3081 1.34 3.1
1.5E-4 0.15 2.4 0.59 1.93 34688 3537 1.53 3.5
1.6E-4 0.16 2.5 0.63 2.1 38370 3913 1.7 3.9
1.7E-4 0.17 2.7 0.67 2.2 43317 4417 1.91 4.4
1.8E-4 0.18 2.9 0.71 2.3 47175 4810 2.1 4.8
1.9E-4 0.19 3.0 0.75 2.4 52562 5360 2.3 5.4
2.0E-4 0.2 3.2 0.79 2.6 58241 5939 2.6 5.9
3.0E-4 0.3 4.8 1.18 3.9 123334 12576 5.5 12.6

Nominal Pipe Size: 3/4"

  • Inside Diameter: 0.023 m (0.92 inches)
Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 3/4"
FlowVelocityPressure Drop
(m3/s)(liter/s)(US gpm)(m/s)(ft/s)(Pa/100m)(mmH2O/100m)(psi/100ft)(ftH2O/100ft)
5.0E-5 0.05 0.79 0.12 0.39 1509 154 0.067 0.154
6.0E-5 0.06 0.95 0.144 0.47 2082 212 0.092 0.21
7.0E-5 0.07 1.11 0.168 0.55 2711 276 0.12 0.28
8.0E-5 0.08 1.27 0.193 0.63 3379 345 0.149 0.34
9.0E-5 0.09 1.43 0.22 0.71 4175 426 0.185 0.43
1.0E-4 0.1 1.59 0.24 0.79 5029 513 0.22 0.51
1.1E-4 0.11 1.74 0.26 0.87 5933 605 0.26 0.61
1.2E-4 0.12 1.9 0.29 0.95 6880 702 0.3 0.7
1.3E-4 0.13 2.1 0.31 1.03 8074 823 0.36 0.82
1.4E-4 0.14 2.2 0.34 1.11 9117 930 0.4 0.93
1.5E-4 0.15 2.4 0.36 1.18 10466 1067 0.46 1.07
1.6E-4 0.16 2.5 0.39 1.26 11587 1181 0.51 1.18
1.7E-4 0.17 2.7 0.41 1.34 13080 1334 0.58 1.34
1.8E-4 0.18 2.9 0.43 1.42 14257 1454 0.63 1.46
1.9E-4 0.19 3.0 0.46 1.5 15885 1620 0.7 1.62
2.0E-4 0.2 3.2 0.48 1.58 17601 1795 0.78 1.8
3.0E-4 0.3 4.8 0.72 2.4 36208 3692 1.6 3.7
4.0E-4 0.4 6.3 0.96 3.2 62358 6359 2.8 6.4
5.0E-4 0.5 7.9 1.2 3.9 94292 9615 4.2 9.6
6.0E-4 0.6 9.5 1.44 4.7 131254 13384 5.8 13.4
7.0E-4 0.7 11.1 1.68 5.5 178651 18217 7.9 18.2

Nominal Pipe Size: 1"

  • Inside Diameter: 0.03 m (1.19 inches)
Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1"
FlowVelocityPressure Drop
(m3/s)(liter/s)(US gpm)(m/s)(ft/s)(Pa/100m)(mmH2O/100m)(psi/100ft)(ftH2O/100ft)
9.0E-5 0.09 1.43 0.127 0.42 1160 118 0.051 0.118
1.0E-4 0.1 1.59 0.141 0.46 1399 143 0.062 0.143
1.1E-4 0.11 1.74 0.156 0.51 1652 168 0.073 0.169
1.2E-4 0.12 1.9 0.17 0.56 1918 196 0.085 0.196
1.3E-4 0.13 2.1 0.184 0.6 2251 230 0.099 0.23
1.4E-4 0.14 2.2 0.198 0.65 2545 260 0.113 0.26
1.5E-4 0.15 2.4 0.21 0.7 2847 290 0.126 0.29
1.6E-4 0.16 2.5 0.23 0.74 3239 330 0.143 0.33
1.7E-4 0.17 2.7 0.24 0.79 3561 363 0.157 0.36
1.8E-4 0.18 2.9 0.25 0.84 3992 407 0.176 0.41
1.9E-4 0.19 3.0 0.27 0.88 4328 441 0.191 0.44
2.0E-4 0.2 3.2 0.28 0.93 4795 489 0.21 0.49
3.0E-4 0.3 4.8 0.42 1.39 9890 1008 0.44 1.01
4.0E-4 0.4 6.3 0.57 1.86 16517 1684 0.73 1.69
5.0E-4 0.5 7.9 0.71 2.3 24975 2547 1.1 2.5
6.0E-4 0.6 9.5 0.85 2.8 34765 3545 1.54 3.5
7.0E-4 0.7 11.1 0.99 3.2 47319 4825 2.1 4.8
8.0E-4 0.8 12.7 1.13 3.7 59674 6085 2.6 6.1
9.0E-4 0.9 14.3 1.27 4.2 75525 7701 3.3 7.7
0.0010 1.0 15.9 1.41 4.6 89910 9168 4.0 9.2
0.0011 1.1 17.4 1.56 5.1 108791 11093 4.8 11.1
0.0012 1.2 19.0 1.7 5.6 129471 13202 5.7 13.2
0.0013 1.3 21 1.84 6.0 151948 15494 6.7 15.5
0.0014 1.4 22 1.98 6.5 169697 17304 7.5 17.3
0.0015 1.5 24 2.1 7.0 194805 19864 8.6 19.9

Nominal Pipe Size: 1 1/4"

  • Inside Diameter: 0.039 m (1.53 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1 1/4"
FlowVelocityPressure Drop
(m3/s)(liter/s)(US gpm)(m/s)(ft/s)(Pa/100m)(mmH2O/100m)(psi/100ft)(ftH2O/100ft)
1.7E-4 0.17 2.7 0.142 0.47 1011 103 0.045 0.103
1.8E-4 0.18 2.9 0.151 0.49 1133 116 0.05 0.116
1.9E-4 0.19 3.0 0.159 0.52 1230 125 0.054 0.126
2.0E-4 0.2 3.2 0.167 0.55 1363 139 0.06 0.139
3.0E-4 0.3 4.8 0.25 0.82 2744 280 0.121 0.28
4.0E-4 0.4 6.3 0.33 1.1 4592 468 0.2 0.47
5.0E-4 0.5 7.9 0.42 1.37 6951 709 0.31 0.71
6.0E-4 0.6 9.5 0.5 1.65 9686 988 0.43 0.99
7.0E-4 0.7 11.1 0.59 1.92 12744 1300 0.56 1.3
8.0E-4 0.8 12.7 0.67 2.2 16072 1639 0.71 1.64
9.0E-4 0.9 14.3 0.75 2.5 20341 2074 0.9 2.1
0.0010 1.0 15.9 0.84 2.7 24215 2469 1.07 2.5
0.0011 1.1 17.4 0.92 3.0 29301 2988 1.29 3.0
0.0012 1.2 19.0 1.0 3.3 34870 3556 1.54 3.6
0.0013 1.3 21 1.09 3.6 39408 4018 1.74 4.0
0.0014 1.4 22 1.17 3.8 45704 4660 2.0 4.7
0.0015 1.5 24 1.26 4.1 52467 5350 2.3 5.4
0.0016 1.6 25 1.34 4.4 59695 6087 2.6 6.1
0.0017 1.7 27 1.42 4.7 67391 6872 3.0 6.9
0.0018 1.8 29 1.51 4.9 72646 7408 3.2 7.4
0.0019 1.9 30 1.59 5.2 80942 8254 3.6 8.3
0.0020 2.0 32 1.67 5.5 89687 9145 4.0 9.2
0.0030 3.0 48 2.5 8.2 193723 19754 8.6 19.8

Nominal Pipe Size: 1 1/2"

  • Inside Diameter: 0.045 m (1.77 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 1 1/2"
FlowVelocityPressure Drop
(m3/s)(liter/s)(US gpm)(m/s)(ft/s)(Pa/100m)(mmH2O/100m)(psi/100ft)(ftH2O/100ft)
3.0E-4 0.3 4.8 0.189 0.62 1381 141 0.061 0.141
4.0E-4 0.4 6.3 0.25 0.83 2315 236 0.102 0.24
5.0E-4 0.5 7.9 0.31 1.03 3508 358 0.155 0.36
6.0E-4 0.6 9.5 0.38 1.24 4736 483 0.21 0.48
7.0E-4 0.7 11.1 0.44 1.44 6446 657 0.28 0.66
8.0E-4 0.8 12.7 0.5 1.65 8139 830 0.36 0.83
9.0E-4 0.9 14.3 0.57 1.86 9946 1014 0.44 1.02
0.0010 1.0 15.9 0.63 2.1 12279 1252 0.54 1.25
0.0011 1.1 17.4 0.69 2.3 14326 1461 0.63 1.46
0.0012 1.2 19.0 0.75 2.5 17050 1739 0.75 1.74
0.0013 1.3 21 0.82 2.7 20010 2040 0.88 2.0
0.0014 1.4 22 0.88 2.9 22347 2279 0.99 2.3
0.0015 1.5 24 0.94 3.1 25653 2616 1.13 2.6
0.0016 1.6 25 1.01 3.3 29188 2976 1.29 3.0
0.0017 1.7 27 1.07 3.5 32950 3360 1.46 3.4
0.0018 1.8 29 1.13 3.7 35520 3622 1.57 3.6
0.0019 1.9 30 1.19 3.9 39576 4036 1.75 4.0
0.0020 2.0 32 1.26 4.1 43852 4472 1.94 4.5
0.0030 3.0 48 1.89 6.2 94720 9659 4.2 9.7
0.0040 4.0 63 2.5 8.3 161375 16455 7.1 16.5

Nominal Pipe Size: 2"

  • Inside Diameter: 0.057 m (2.2 inches)

For full table with Pressure Drops - rotate the screen!

Pressfit Piping - Pressure Drop due to Friction Loss vs. Water Flow - 2"
FlowVelocityPressure Drop
(m3/s)(liter/s)(US gpm)(m/s)(ft/s)(Pa/100m)(mmH2O/100m)(psi/100ft)(ftH2O/100ft)
5.0E-4 0.5 7.9 0.196 0.64 1110 113 0.049 0.113
6.0E-4 0.6 9.5 0.24 0.77 1549 158 0.068 0.158
7.0E-4 0.7 11.1 0.27 0.9 2043 208 0.09 0.21
8.0E-4 0.8 12.7 0.31 1.03 2582 263 0.114 0.26
9.0E-4 0.9 14.3 0.35 1.16 3159 322 0.14 0.32
0.0010 1.0 15.9 0.39 1.29 3766 384 0.166 0.38
0.0011 1.1 17.4 0.43 1.41 4556 465 0.2 0.47
0.0012 1.2 19.0 0.47 1.54 5422 553 0.24 0.55
0.0013 1.3 21 0.51 1.67 6137 626 0.27 0.63
0.0014 1.4 22 0.55 1.8 7117 726 0.31 0.73
0.0015 1.5 24 0.59 1.93 8170 833 0.36 0.83
0.0016 1.6 25 0.63 2.1 8951 913 0.4 0.91
0.0017 1.7 27 0.67 2.2 10105 1030 0.45 1.03
0.0018 1.8 29 0.71 2.3 11329 1155 0.5 1.16
0.0019 1.9 30 0.74 2.4 12623 1287 0.56 1.29
0.0020 2.0 32 0.78 2.6 13449 1371 0.59 1.37
0.0030 3.0 48 1.18 3.9 29049 2962 1.28 3.0
0.0040 4.0 63 1.57 5.1 49491 5047 2.2 5.1
0.0050 5.0 79 1.96 6.4 77329 7885 3.4 7.9
0.0060 6.0 95 2.4 7.7 106513 10861 4.7 10.9
0.0070 7.0 111 2.7 9.0 144976 14783 6.4 14.8
0.0080 8.0 127 3.1 10.3 189356 19309 8.4 19.3

A diagram based the tables above: "Pressfit Pipes - Pressure Loss Diagram".

 

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