Purging; Gas Line Leak Testing - State Water Heaters GPG/GPV-540A Instruction Manual

TABLE 11. MAXIMUM CAPACITY OF PIPE IN
CUBIC FEET OF GAS PER HOUR
NOMINAL IRON PIPE SIZE (INCHES)
LENGTH
IN FEET
1/2 3/4 1
10 175 360 680
20 120 250 465
30 97 200 375
40 82 170 320
50 73 151 285
60 66 138 260
70 61 125 240
80 57 118 220
90 53 110 205
100 50 103 195
125 44 93 175
150 40 84 160
175 37 77 145
200 35 72 135
TABLE 11A.
LENGTH
NOMINAL IRON PIPE SIZES, MILLIMETERS
IN
1/2 3/4 1
METERS
3.0 51 105 199
6.1 35 73 142
9.1 28 59 110
12.2 24 50 94
15.2 21 44 83
18.3 19 40 76
21.3 18 37 70
24.4 17 35 64
27.4 16 32 60
30.5 15 30 57
38.1 13 27 51
45.7 12 25 47
53.3 11 23 42
61.0 10 21 40
1 1/4 1 1/2 2 2 1/2 3
950
770
660 990
580 900
530 810
490 750
460 690
430 650
400 620
360 550
325 500 950
300 460 850
280 430 800
1 1/4 1 1/2" 2 2 1/2 3
410 615 1160 1845 3221
278 428 805 1277 2255
225 346 644 1031 1830
193 290 556 878 1552
170 264 492 776 1391
155 237 445 703 1259
143 220 410 659 1142
135 202 381 600 1083
126 190 357 571 1010
117 182 337 542 952
105 161 299 483 864
95 146 278 439 776
88 135 249 401 717
82 126 234 375 688
GAS METER SIZE – NATURAL GASES ONLY
GAS PIPING AND SEDIMENT TRAP INSTALLATION
4

GAS LINE LEAK TESTING

4
6735
4626
3748
3192
2840
2577
2372
2196
2108
1962
1757
1610
1464
1347

PURGING

27
FIGURE 23.
Fire and Explosion Hazard
Use joint compound or Teflon tape
compatible with propane gas.
Leak test before placing the water
heater in operation.
Disconnect gas piping and main gas
shutoff valve before leak testing.
Install sediment trap in accordance
with NFPA 54.