The handbook of Technical irrigaTion informaTion - Hunter Industries

Handbook of Technical Irrigation InformationFriction Factor Short Cuts for Class 200 PVC*Maximum GPM for Various Friction FactorsFriction Factor 0.25 0.50 0.75 1 1.25 1.50 1.75 2Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" CL 315 PVC 1.1 1.6 2.0 2.3 2.6 2.8 3.1 3.3¾" CL 200 PVC 2.1 3.1 3.9 4.5 5.1 5.7 6.1 6.61" CL 200 PVC 4.1 6.0 7.4 8.7 9.8 10.8 11.7 12.61¼" CL 200 PVC 7.6 11.0 13.7 16.0 18.1 19.9 21.7 23.31½" CL 200 PVC 10.8 15.7 19.6 22.9 25.8 28.5 30.9 33.22" CL 200 PVC 19.4 28.2 35.1 41.0 46.3 51.1 55.5 59.72½" CL 200 PVC 32.1 46.6 58.0 67.8 76.4 84.3 91.7 98.53" CL 200 PVC 53.7 78.1 97.2 113.6 128.1 141.4 153.7 165.1Friction Factor 2.25 2.50 2.75 3 3.25 3.50 3.75 4Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" CL 315 PVC 3.5 3.7 3.9 4.1 4.3 4.5 4.7 4.8¾" CL 200 PVC 7.0 7.5 7.8 8.2 8.6 8.9 9.3 9.61" CL 200 PVC 13.4 14.2 15.0 15.7 16.4 17.0 17.7 18.31¼" CL 200 PVC 24.8 26.3 27.6 29.0 30.3 31.5 32.7 33.81½" CL 200 PVC 35.4 37.5 39.5 41.4 43.2 45.0 46.7 48.32" CL 200 PVC 63.6 67.3 70.9 74.3 77.5 80.7 83.8 86.72½" CL 200 PVC 105.0 111.1 117.0 122.6 128.1 133.3 138.3 143.23" CL 200 PVC 176.0 186.3 196.1 205.6 214.6 223.4 231.9 240.1Friction Factor 4.25 4.50 4.75 5 5.25 5.50 5.75 6Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" CL 315 PVC 5.0 5.1 5.3 5.5 5.6 5.7 5.9 6.0¾" CL 200 PVC 9.9 10.2 10.5 10.8 11.1 11.4 11.7 12.01" CL 200 PVC 18.9 19.5 20.1 20.7 21.2 21.8 22.3 22.81¼" CL 200 PVC 35.0 36.1 37.1 38.2 39.2 40.2 41.2 42.11½" CL 200 PVC 49.9 51.5 53.0 54.5 56.0 57.4 58.8 60.22" CL 200 PVC 89.6 92.4 95.2 97.9 100.5 103.0 105.5 108.02½" CL 200 PVC 148.0 152.7 157.2 161.6 165.9 170.1 174.3 178.33" CL 200 PVC 248.1 255.9 263.4 270.8 278.1 285.1 292.1 298.9Friction Factor 6.25 6.50 6.75 7 7.25 7.50 7.75 8Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" CL 315 PVC 6.1 6.3 6.4 6.5 6.7 6.8 6.9 7.0¾" CL 200 PVC 12.2 12.5 12.7 13.0 13.2 13.5 13.7 14.01" CL 200 PVC 23.3 23.8 24.3 24.8 25.3 25.7 26.2 26.61¼" CL 200 PVC 43.1 44.0 44.9 45.8 46.7 47.5 48.4 49.21½" CL 200 PVC 61.5 62.8 64.1 65.4 66.6 67.9 69.1 70.32" CL 200 PVC 110.4 112.7 115.1 117.4 119.6 121.8 124.0 126.12½" CL 200 PVC 182.3 186.2 190.0 193.8 197.5 201.1 204.7 208.33" CL 200 PVC 305.5 312.1 318.5 324.8 331.0 337.1 343.2 349.1*Note: ½" pipe is Class 315 PVC because wall thickness must be at least 0.060" and Class 200 has a SDR of 21 which would result in a wall thickness in ½"pipe of less than 0.060".52