MECHANICAL INSTALLATION — FUEL SYSTEM (GASEOUS FUELS)
Figure 12. Typical Pipe Schematic for Propane Vapor Distribution
TABLE 14. PROPANE VAPOR SCHEDULE 40 IRON PIPE SIZING
Pipe Size (in.)
Length | 1/2 | 3/4 |
| 1 | 1 1/4 | 1 1/2 | 2 | 3 |
| 3 1/2 | 4 |
(0.622) | (0.824) |
| (1.049) | (1.38) | (1.61) | (2.067) | (3.068) |
| (3.548) | (4.026) | |
(ft.) |
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| Maximum capacity in thousands of BTU per hour |
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10 | 291 | 608 |
| 1145 | 2352 | 3523 | 6786 | 19119 |
| 27993 | 38997 |
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20 | 200 | 418 |
| 787 | 1616 | 2422 | 4664 | 13141 |
| 19240 | 26802 |
30 | 160 | 336 |
| 632 | 1298 | 1945 | 3745 | 10552 |
| 15450 | 21523 |
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40 | 137 | 287 |
| 541 | 1111 | 1664 | 3205 | 9031 |
| 13223 | 18421 |
50 | 122 | 255 |
| 480 | 984 | 1475 | 2841 | 8004 |
| 11720 | 16326 |
60 | 110 | 231 |
| 434 | 892 | 1337 | 2574 | 7253 |
| 10619 | 14793 |
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80 | 94 | 197 |
| 372 | 763 | 1144 | 2203 | 6207 |
| 9088 | 12661 |
100 | 84 | 175 |
| 330 | 677 | 1014 | 1952 | 5501 |
| 8055 | 11221 |
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125 | 74 | 155 |
| 292 | 600 | 899 | 1730 | 4876 |
| 7139 | 9945 |
150 | 67 | 140 |
| 265 | 543 | 814 | 1568 | 4418 |
| 6468 | 9011 |
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200 | 58 | 120 |
| 227 | 465 | 697 | 1342 | 3781 |
| 5536 | 7712 |
250 | 51 | 107 |
| 201 | 412 | 618 | 1189 | 3351 |
| 4906 | 6835 |
300 | 46 | 97 |
| 182 | 373 | 560 | 1078 | 3036 |
| 4446 | 6193 |
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350 | 42 | 89 |
| 167 | 344 | 515 | 991 | 2793 |
| 4090 | 5698 |
400 | 40 | 83 |
| 156 | 320 | 479 | 922 | 2599 |
| 3805 | 5301 |
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TABLE 15. PROPANE VAPOR | |||||||||||
Tube Size | K&L | 1/4 | 3/8 | 1/2 | 5/8 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | 2 1/2 |
(in.) | ACR | 3/8 | 1/2 | 5/8 | 3/4 | 7/8 | 1 1/8 | 1 3/8 | 1 5/8 | 2 1/8 | 2 5/8 |
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Outside | 0.375 | 0.500 | 0.625 | 0.750 | 0.875 | 1.125 | 1.375 | 1.625 | 2.125 | 2.625 | |
Inside * | 0.305 | 0.402 | 0.527 | 0.652 | 0.745 | 0.995 | 1.245 | 1.481 | 1.959 | 2.435 | |
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Length (ft) |
| Maximum Capacity in Cubic Feet of Gas per Hour |
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10 |
| 45 | 93 | 188 | 329 | 467 | 997 | 1795 | 2830 | 5895 | 10429 |
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20 |
| 31 | 64 | 129 | 226 | 321 | 685 | 1234 | 1945 | 4051 | 7168 |
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30 |
| 25 | 51 | 104 | 182 | 258 | 550 | 991 | 1562 | 3253 | 5756 |
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40 |
| 21 | 44 | 89 | 155 | 220 | 471 | 848 | 1337 | 2784 | 4926 |
50 |
| 19 | 39 | 79 | 138 | 195 | 417 | 752 | 1185 | 2468 | 4366 |
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60 |
| 17 | 35 | 71 | 125 | 177 | 378 | 681 | 1074 | 2236 | 3956 |
70 |
| 16 | 32 | 66 | 115 | 163 | 348 | 626 | 988 | 2057 | 3639 |
80 |
| 15 | 30 | 61 | 107 | 152 | 324 | 583 | 919 | 1914 | 3386 |
90 |
| 14 | 28 | 57 | 100 | 142 | 304 | 546 | 862 | 1796 | 3177 |
100 |
| 13 | 27 | 54 | 95 | 134 | 287 | 517 | 814 | 1696 | 3001 |
125 |
| 11 | 24 | 48 | 84 | 119 | 254 | 458 | 722 | 1503 | 2660 |
150 |
| 10 | 21 | 44 | 76 | 108 | 230 | 415 | 654 | 1362 | 2410 |
175 |
| 10 | 20 | 40 | 70 | 99 | 212 | 382 | 602 | 1253 | 2217 |
200 |
| 8.9 | 18 | 37 | 65 | 92 | 197 | 355 | 560 | 1166 | 2062 |
225 |
| 8.3 | 17 | 35 | 61 | 87 | 185 | 333 | 525 | 1094 | 1935 |
250 |
| 7.9 | 16 | 33 | 58 | 82 | 175 | 315 | 496 | 1033 | 1828 |
275 |
| 7.5 | 15 | 31 | 55 | 78 | 166 | 299 | 471 | 981 | 1736 |
300 |
| 7.1 | 15 | 30 | 52 | 74 | 158 | 285 | 449 | 936 | 1656 |
*Table capacities are based on Type K copper tubing inside diameter (shown), which has the smallest inside diameter of the copper tubing products.
INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07) — PAGE 43
