Water Handling Equipment Guide - National Wildfire Coordinating ...

APPENDIXES
A—Nozzle Flow Rates
Flow discharge of smooth bore nozzles in gallons per minute (gal/min)
Nozzle flow (gal/min) @ ea. tip orifice size*
Head Head Velocity of 8 x 4 a 2 s w 1
(psi) (ft) discharge inch inch inch inch inch inch inch inch
(ft/sec)
10 23.1 38.6 1.5 3.3 5.9 13 24 37 53 95
15 34.6 47.3 1.8 4.1 7.3 16 29 45 65 116
20 46.2 54.6 2.1 4.7 8.4 19 34 52 75 134
25 57.7 61.0 2.3 5.3 9.4 21 38 59 84 150
30 69.3 66.9 2.6 5.8 10 23 41 64 92 164
35 80.3 72.2 2.8 6.2 11 25 44 69 100 177
40 92.4 77.2 3.0 6.7 12 27 47 74 107 190
45 103.9 81.8 3.1 7.1 13 28 50 79 113 201
50 115.5 86.3 3.3 7.5 13 30 53 83 119 212
55 127.0 90.4 3.5 7.8 14 31 56 87 125 222
60 138.6 94.5 3.6 8.2 15 33 58 91 131 232
65 150.1 98.3 3.8 8.5 15 34 60 94 136 242
70 161.7 102 3.9 8.8 16 35 63 98 141 251
75 173.2 106 4.1 9.1 16 37 65 101 146 260
80 184.8 109 4.2 9.4 17 38 67 105 151 268
85 196.3 113 4.3 9.7 17 39 69 108 156 277
90 207.9 116 4.4 10 18 40 71 111 160 285
95 219.4 119 4.6 10 18 41 73 114 164 292
100 230.9 122 4.7 11 19 42 75 117 169 300
105 242.4 125 4.8 11 19 43 77 120 173 307
110 254.0 128 4.9 11 20 44 79 123 177 315
115 265.5 131 5.0 11 20 45 80 126 181 322
120 277.1 134 5.1 12 21 46 82 128 185 329
125 288.6 136 5.2 12 21 47 84 131 189 335
130 300.2 139 5.3 12 21 48 86 134 192 342
135 311.7 142 5.4 12 22 49 87 136 196 349
140 323.3 144 5.5 12 22 50 89 139 200 355
145 334.8 147 5.6 13 23 51 90 141 203 361
150 346.4 150 5.7 13 23 52 92 144 207 367
175 404.1 161 6.2 14 25 56 99 155 223 397
200 461.9 173 6.6 15 27 60 106 166 239 424
250 577.4 193 7.4 17 30 67 119 185 267 474
300 692.8 211 8.1 18 32 73 130 203 292 520
* Based on gal/min= 30d 2 (NP) 1/2
Where: d = nozzle diameter, inches
NP = nozzle pressure head, psi
179