Polyethylene - PE Pipes - Pressure Drops

Water flow in SDR pressure rated pipes - pressure loss and velocity tables - imperial and SI units

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

Nominal Pipe Size: 1/2"

  • Inside Diameter: 0.0158 m (0.62 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
3.0E-50.030.480.1530.535503620.1570.36
4.0E-50.040.630.20.6757855900.260.59
5.0E-50.050.790.260.8486298800.380.88
6.0E-50.060.950.311.01183412070.521.21
7.0E-50.071.110.361.171530215600.681.56
8.0E-50.081.270.411.341946019840.861.99
9.0E-50.091.430.461.512329823761.032.4
1.0E-40.11.590.511.672876329331.272.9
1.1E-40.111.740.561.843380934471.493.5
1.2E-40.121.90.612.03905239821.734.0
1.3E-40.132.10.662.24444345321.964.5
1.4E-40.142.20.712.35154352562.35.3
1.5E-40.152.40.772.55732158452.55.9
1.6E-40.162.50.822.76521866502.96.7
1.7E-40.172.70.872.87125072653.17.3
1.8E-40.182.90.923.07987981453.58.2
1.9E-40.193.00.973.28900190753.99.1
2.0E-40.23.21.023.39532997214.29.7
3.0E-40.34.81.535.0199697203638.820

Nominal Pipe Size: 3/4"

  • Inside Diameter: 0.021 m (0.82 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
4.0E-50.040.630.1150.3815221550.0670.155
5.0E-50.050.790.1440.4722292270.0990.23
6.0E-50.060.950.1730.5730673130.1360.31
7.0E-50.071.110.20.6639804060.1760.41
8.0E-50.081.270.230.7649455040.220.5
9.0E-50.091.430.260.8560996220.270.62
1.0E-40.11.590.290.9573317480.320.75
1.1E-40.111.740.321.0486318800.380.88
1.2E-40.121.90.351.14998610180.441.02
1.3E-40.132.10.381.231172011950.521.2
1.4E-40.142.20.41.331320413460.581.35
1.5E-40.152.40.431.421471115000.651.5
1.6E-40.162.50.461.521673817070.741.71
1.7E-40.172.70.491.611832318680.811.87
1.8E-40.182.90.521.72054220950.912.1
1.9E-40.193.00.551.82288823341.012.3
2.0E-40.23.20.581.892456825051.092.5
3.0E-40.34.80.872.84992950912.25.1
4.0E-40.46.31.153.88559387283.88.7
5.0E-40.57.91.444.7123833126275.512.6
6.0E-40.69.51.735.7171186174567.617.5

Nominal Pipe Size: 1"

  • Inside Diameter: 0.027 m (1.05 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
7.0E-50.071.110.1220.412161240.0540.124
8.0E-50.081.270.140.4615161550.0670.155
9.0E-50.091.430.1570.5218731910.0830.191
1.0E-40.11.590.1750.5722562300.10.23
1.1E-40.111.740.1920.6326612710.1180.27
1.2E-40.121.90.210.6930863150.1360.31
1.3E-40.132.10.230.7435263600.1560.36
1.4E-40.142.20.240.839794060.1760.41
1.5E-40.152.40.260.8645684660.20.47
1.6E-40.162.50.280.9250535150.220.52
1.7E-40.172.70.30.9755415650.240.57
1.8E-40.182.90.311.0362126330.270.63
1.9E-40.193.00.331.0967186850.30.69
2.0E-40.23.20.351.1574447590.330.76
3.0E-40.34.80.521.721522615530.671.55
4.0E-40.46.30.72.32526425761.122.6
5.0E-40.57.90.872.93806638821.683.9
6.0E-40.69.51.053.45278553822.35.4
7.0E-40.711.11.224.06908370443.17.1
8.0E-40.812.71.44.68662188333.88.8
9.0E-40.914.31.575.2109630111794.811.2
0.00101.015.91.755.7129706132265.713.2
0.00111.117.41.926.3156944160046.916.0
0.00121.219.02.16.9178656182187.918.2

Nominal Pipe Size: 1 1/4"

  • Inside Diameter: 0.035 m (1.38 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
1.3E-40.132.10.1350.4410411060.0460.106
1.4E-40.142.20.1460.4811781200.0520.12
1.5E-40.152.40.1560.5113171340.0580.134
1.6E-40.162.50.1660.5514591490.0640.149
1.7E-40.172.70.1770.5816471680.0730.168
1.8E-40.182.90.1870.6117971830.0790.183
1.9E-40.193.00.1970.6520022040.0880.2
2.0E-40.23.20.210.6821572200.0950.22
3.0E-40.34.80.311.0244374520.1960.45
4.0E-40.46.30.421.3673957540.330.75
5.0E-40.57.90.521.71078511000.481.1
6.0E-40.69.50.622.01497515270.661.53
7.0E-40.711.10.732.41962820010.872.0
8.0E-40.812.70.832.72465125141.092.5
9.0E-40.914.30.943.13119931811.383.2
0.00101.015.91.043.43697637701.633.8
0.00111.117.41.143.84474145621.984.6
0.00121.219.01.254.15102752032.35.2
0.00131.3211.354.45988661072.66.1
0.00141.4221.464.86945470823.17.1
0.00151.5241.565.17626377773.47.8
0.00161.6251.665.58677188483.88.9
0.00171.7271.775.89795699894.310.0
0.00181.8291.876.1109819111984.911.2
0.00191.9301.976.5116799119105.211.9
0.00202.0322.16.8129417131975.713.2

Nominal Pipe Size: 1 1/2"

  • Inside Diameter: 0.041 m (1.61 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
2.0E-40.23.20.1510.510341050.0460.106
3.0E-40.34.80.230.7520742120.0920.21
4.0E-40.46.30.30.9934643530.1530.35
5.0E-40.57.90.381.2450645160.220.52
6.0E-40.69.50.451.4970407180.310.72
7.0E-40.711.10.531.7492409420.410.94
8.0E-40.812.70.611.991162211850.511.19
9.0E-40.914.30.682.21470915000.651.5
0.00101.015.90.762.51746117810.771.78
0.00111.117.40.832.72112821540.932.2
0.00121.219.00.913.02413824611.072.5
0.00131.3210.983.22832928891.252.9
0.00141.4221.063.53148632111.393.2
0.00151.5241.143.73614536861.63.7
0.00161.6251.214.04112441931.824.2
0.00171.7271.294.24440745281.964.5
0.00181.8291.364.54978550772.25.1
0.00191.9301.444.75547056562.55.7
0.00202.0321.515.06146362672.76.3
0.00303.0482.37.5125720128205.612.8

Nominal Pipe Size: 2"

  • Inside Diameter: 0.053 m (2.1 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
4.0E-40.46.30.1810.5910221040.0450.104
5.0E-40.57.90.230.7415001530.0660.153
6.0E-40.69.50.270.8920902130.0920.21
7.0E-40.711.10.321.0427502800.1220.28
8.0E-40.812.70.361.1934673540.1530.35
9.0E-40.914.30.411.3442324320.1870.43
0.00101.015.90.451.4950315130.220.51
0.00111.117.40.51.6460876210.270.62
0.00121.219.00.541.7869667100.310.71
0.00131.3210.591.9381758340.360.83
0.00141.4220.632.194819670.420.97
0.00151.5240.682.21044910650.461.07
0.00161.6250.732.41188812120.531.21
0.00171.7270.772.51342113690.591.37
0.00181.8290.822.71441914700.641.47
0.00191.9300.862.81606616380.711.64
0.00202.0320.913.01780218150.791.82
0.00303.0481.364.53657137291.623.7
0.00404.0631.815.96191963142.76.3
0.00505.0792.37.49191193724.19.4
0.00606.0952.78.9132351134965.813.5
0.00707.01113.210.4170663174037.517.4

Nominal Pipe Size: 2 1/2"

  • Inside Diameter: 0.063 m (2.5 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
7.0E-40.711.10.220.7411991220.0530.122
8.0E-40.812.70.260.8415131540.0670.154
9.0E-40.914.30.290.9518491890.0820.189
0.00101.015.90.321.0522012240.0970.22
0.00111.117.40.351.1626642720.1180.27
0.00121.219.00.381.2630533110.1350.31
0.00131.3210.421.3735833650.1580.37
0.00141.4220.451.4739954070.1770.41
0.00151.5240.481.5845864680.20.47
0.00161.6250.511.6852185320.230.53
0.00171.7270.551.7956555770.250.58
0.00181.8290.581.8963406470.280.65
0.00191.9300.612.070647200.310.72
0.00202.0320.642.178277980.350.8
0.00303.0480.963.21614416460.711.65
0.00404.0631.284.22739627941.212.8
0.00505.0791.65.34076841571.84.2
0.00606.0951.926.35577156872.55.7
0.00707.01112.27.47591077413.47.7
0.00808.01272.68.49392995784.29.6
0.00909.01432.99.5118879121225.312.1
0.0110.01593.210.5138611141346.114.1
0.01111.01743.511.6167719171027.417.1
0.01212.01903.812.6199600203538.820

Nominal Pipe Size: 3"

  • Inside Diameter: 0.078 m (3.1 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
0.00121.219.00.250.8211301150.050.115
0.00131.3210.270.8912791300.0570.131
0.00141.4220.290.9614831510.0660.151
0.00151.5240.311.0316401670.0720.167
0.00161.6250.331.118651900.0820.19
0.00171.7270.361.1721062150.0930.21
0.00181.8290.381.2422702310.10.23
0.00191.9300.41.325292580.1120.26
0.00202.0320.421.3728032860.1240.29
0.00303.0480.632.158025920.260.59
0.00404.0630.842.794179600.420.96
0.00505.0791.053.41401414290.621.43
0.00606.0951.264.12018020580.892.1
0.00707.01111.464.82609326611.152.7
0.00808.01271.675.53408134751.513.5
0.00909.01431.886.24086441671.814.2
0.0110.01592.16.95044951442.25.1
0.01111.01742.37.66104362252.76.2
0.01212.01902.58.27264674083.27.4
0.01313.02062.78.98052282113.68.2
0.01414.02222.99.69338695234.19.5
0.01515.02383.110.3107204109324.710.9
0.01616.02543.311.0121974124385.412.5
0.01717.02693.611.7137697140416.114.1
0.01818.02853.812.4145293148156.414.8
0.01919.03014.013.0161885165077.216.5
0.02203174.213.7179373182917.918.3

Nominal Pipe Size: 4"

  • Inside Diameter: 0.102 m (4.0 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
0.00303.0480.371.215831610.070.162
0.00404.0630.491.6126972750.1190.28
0.00505.0790.612.040314110.1780.41
0.00606.0950.732.455415650.240.57
0.00707.01110.862.871837320.320.73
0.00808.01270.983.293819570.410.96
0.00909.01431.13.61127911500.51.15
0.0110.01591.224.01392514200.621.42
0.01111.01741.354.41685017180.741.72
0.01212.01901.474.81899719370.841.94
0.01313.02061.595.22229522730.992.3
0.01414.02221.715.62585726371.142.6
0.01515.02381.846.02968330271.313.0
0.01616.02541.966.43189632521.413.3
0.01717.02692.16.83600836721.593.7
0.01818.02852.27.24036941161.784.1
0.01919.03012.37.64497945861.994.6
0.02203172.48.04983850822.25.1
0.03304763.712.0105539107624.710.8
0.04406344.916.1175898179367.818.0

Nominal Pipe Size: 6"

  • Inside Diameter: 0.154 m (6.1 inches)
Flow Velocity Pressure Drop
(m3/s) (liter/s) (US gpm) (m/s) (ft/s) (Pa/100m) (mmH2O/100m) (psi/100ft) (ftH2O/100ft)
0.00707.01110.381.2310071030.0450.103
0.00808.01270.431.4112561280.0550.128
0.00909.01430.481.5915891620.070.162
0.0110.01590.541.7618681910.0830.191
0.01111.01740.591.9422612310.10.23
0.01212.01900.642.126912740.1190.27
0.01313.02060.72.330003060.1330.31
0.01414.02220.752.534793550.1540.36
0.01515.02380.812.639944070.1770.41
0.01616.02540.862.845444630.20.46
0.01717.02690.913.048604960.210.5
0.01818.02850.973.254485560.240.56
0.01919.03011.023.360716190.270.62
0.02203171.073.567266860.30.69
0.03304761.615.31429414580.631.46
0.04406342.17.02391624391.062.4
0.05507932.78.83503335721.553.6
0.06609513.210.65044851442.25.1
0.077011103.812.36866570023.07.0
0.088012684.314.18370685353.78.5
0.099014274.815.9105940108034.710.8
0.110015855.417.6130790133375.813.4
0.1111017445.919.4158256161377.016.2
0.1212019026.421188338192058.319.2
  • 1 psi (lb/in2) = 6,894.8 Pa (N/m2) = 6.895x10-3 N/mm2 = 6.895x10-2 bar = 27.71 in H2O at 62oF (16.7oC) = 703.1 mm H2O at 62oF (16.7oC) = 2.0416 in mercury at 62oF (16.7oC) = 51.8 mm mercury at 62oF (16.7oC) = 703.6 kg/m2 = 0.06895 atm = 2.307 Ft. H2O = 16 ounces
  • 1 ft/s = 0.3048 m/s
  • 1 gal (US)/min =6.30888x10-5 m3/s = 0.0227 m3/h = 0.06309 dm3(litre)/s = 2.228x10-3 ft3/s = 0.1337 ft3/min = 0.8327 Imperial gal (UK)/min

Related Topics

Related Documents

Tag Search

  • en: pe peh polyethylene pipe pressure loss psi

Search the Engineering ToolBox

- "Search is the most efficient way to navigate the Engineering ToolBox!"

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your SketchUp model with the Engineering ToolBox - SketchUp Extension/Plugin - enabled for use with the amazing, fun and free SketchUp Make and SketchUp Pro. Add the Engineering ToolBox extension to your SketchUp from the Sketchup Extension Warehouse!

Translate the Engineering ToolBox!
About the Engineering ToolBox!

close