Thermal Solutions EVO-500 Installation, Operating And Service Instructions page 23

TABLE 4: MAXIMUM GAS CAPACITY OF SCHEDULE 40 PIPE.
(Based on Gas Pressure less than 2 psi, pressure drop of 0.3 in w.c. and 0.6 specific gravity.)
Pipe Length in
3/4
Equivalent Feet
10 273
20 188
30 151
40 129
50 114
60 104
70 95
80 89
90 83
100 79
125 70
150 63
175 58
200 54
Pipe Size (in.)
1 1-1/4 1-1/2
Capacity in Cubic Feet of Gas Per Hour
514 1060 1580
353 726 1090
284 583 873
243 499 747
215 442 662
195 400 600
179 368 552
167 343 514
157 322 482
148 304 455
131 269 403
119 244 366
109 224 336
102 209 313
23
2 2-1/2
3050 4860
2090 3340
1680 2680
1440 2290
1280 2030
1160 1840
1060 1690
989 1580
928 1480
877 1400
777 1240
704 1120
648 1030
602 960
TABLE 5 – SPECIFIC GRAVITY
CORRECTION FACTORS
Specific Correction
Gravity Factor
0.50 1.10
1.04
0.55
1.00
0.60
0.96
0.65
0.93
0.70
0.90
0.75
0.80
0.87
0.85
0.84
0.90
0.82
1.00
0.78
3 4
8580 17500
5900 12000
4740 9660
4050 8270
3590 7330
3260 6640
3000 6110
2790 5680
2610 5330
2470 5040
2190 4460
1980 4050
1820 3720
1700 3460
Specific Correction
Gravity Factor
1.10 0.74
1.20 0.71
1.30 0.68
1.40 0.66
1.50 0.63
1.60 0.61
1.70 0.59
1.80 0.58
1.90 0.56
2.00 0.55