The handbook of Technical irrigaTion informaTion - Hunter Industries

Tables – Friction Factor ShortcutsFriction Factor Short Cuts for Polyethylene (PE) – SDR-7 (IPS) Pressure Rated TubeMaximum GPM for Various Friction FactorsFriction Factor 8.25 8.50 8.75 9 9.25 9.50 9.75 10Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" SDR-Poly 4.6 4.7 4.8 4.8 4.9 5.0 5.0 5.1¾" SDR-Poly 9.6 9.8 10.0 10.1 10.3 10.4 10.6 10.71" SDR-Poly 18.2 18.5 18.8 19.1 19.3 19.6 19.9 20.21¼" SDR-Poly 37.4 38.0 38.6 39.2 39.8 40.3 40.9 41.51½" SDR-Poly 56.0 57.0 57.9 58.7 59.6 60.5 61.3 62.22" SDR-Poly 108.1 109.8 111.5 113.3 114.9 116.6 118.3 119.92½" SDR-Poly 172.4 175.2 177.9 180.7 183.4 186.0 188.6 191.23" SDR-Poly 305.0 310.0 314.9 319.7 324.4 329.1 333.8 338.4Friction Factor 10.25 10.50 10.75 11 11.25 11.50 11.75 12Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" SDR-Poly 5.2 5.2 5.3 5.4 5.4 5.5 5.6 5.6¾" SDR-Poly 10.8 11.0 11.1 11.3 11.4 11.5 11.7 11.81" SDR-Poly 20.4 20.7 21.0 21.2 21.5 21.8 22.0 22.31¼" SDR-Poly 42.0 42.6 43.1 43.7 44.2 44.7 45.2 45.81½" SDR-Poly 63.0 63.8 64.7 65.5 66.3 67.1 67.8 68.62" SDR-Poly 121.5 123.1 124.7 126.2 127.8 129.3 130.8 132.32½" SDR-Poly 193.8 196.3 198.8 201.3 203.8 206.2 208.6 211.03" SDR-Poly 342.9 347.4 351.9 356.3 360.6 364.9 369.2 373.4Friction Factor 12.25 12.50 12.75 13 13.25 13.50 13.75 14Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" SDR-Poly 5.7 5.8 5.8 5.9 5.9 6.0 6.1 9.5¾" SDR-Poly 11.9 12.1 12.2 12.3 12.5 12.6 12.7 18.91" SDR-Poly 22.5 22.8 23.0 23.2 23.5 23.7 24.0 36.51¼" SDR-Poly 46.3 46.8 47.3 47.8 48.3 48.8 49.3 70.11½" SDR-Poly 69.4 70.1 70.9 71.6 72.4 73.1 73.8 100.12" SDR-Poly 133.8 135.2 136.7 138.1 139.6 141.0 142.4 180.02½" SDR-Poly 213.4 215.7 218.0 220.3 222.6 224.9 227.1 297.43" SDR-Poly 377.6 381.7 385.8 389.9 393.9 397.9 401.9 497.7Friction Factor 14.25 14.50 14.75 15 15.25 15.50 15.75 16Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM Max. GPM½" SDR-Poly 6.2 6.2 6.3 6.4 6.4 6.5 6.5 6.6¾" SDR-Poly 13.0 13.1 13.2 13.3 13.4 13.6 13.7 13.81" SDR-Poly 24.4 24.7 24.9 25.1 25.3 25.6 25.8 26.01¼" SDR-Poly 50.2 50.7 51.2 51.6 52.1 52.5 53.0 53.51½" SDR-Poly 75.3 76.0 76.7 77.4 78.1 78.8 79.5 80.12" SDR-Poly 145.2 146.5 147.9 149.2 150.6 151.9 153.2 154.52½" SDR-Poly 231.5 233.7 235.9 238.0 240.2 242.3 244.4 246.53" SDR-Poly 409.7 413.6 417.4 421.2 425.0 428.7 432.5 436.257