Navien CH-180 Installation Manual page 31

Gas Pipe Sizing Chart:
Referenced from Uniform Plumbing Code 1997
Maximum Natural Gas Delivery Capacity
3
in Cubic Feet (ft ) per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
10' 20' 30'
249
363 200
3/4"
684 470 377
1"
1,404 965 775
1 1/4"
2,103 1,445 1,161
1 1/2"
4,050 2,784 2,235
2"
6,455 4,437 3,563
2 1/2"
11,412 7,843 6,299
3"
16,709 11,484 9,222
3 1/2"
23,277 15,998 12,847
4"
Contact your gas supplier for BTU/ft
Maximum Liquefied Propane Delivery Capacity
in Thousands of BTU/Hour(0.5" WC Pressure Drop)
Pipe
Size
10' 20' 30'
3/4" 567 393 315
1" 1,071 732 590
1 1/4" 2,205 1,496 775
1 1/2" 3,307 2,299 1,161
2" 6,221 4,331 2,235
**For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Maximum Natural Gas Delivery Capacity with Corrugated Stainless Steel Pipe
3
in Cubic Feet (ft ) per Hour (0.60 Specific Gravity, 0.5" WC Pressure Drop)
Pipe
Size
10' 20' 30'
3/4" 206 147 121
1" 383 269 218
1 1/4" 614 418 334
1 1/2" 1,261 888 723
2" 2,934 2,078 1,698
Maximum Liquefied Propane Delivery Capacity with Corrugated Stainless Steel Pipe
in Thousands of BTU/Hour(0.5" WC Pressure Drop)
Pipe
Size
10' 20'
30'
3/4" 325 232 191
1" 605 425 344
1 1/4" 971 661 528
1 1/2" 1,993 1,404 1,143
2" 4,638 3,285 2,684
** For reference only. Please consult gas pipe manufacturer for actual pipe capacities.
Length in Feet
40' 50' 60'
171 152 138
323
286 259
663 588
532
993 880 798
1,913 1,696 1,536
3,049 2,703 2,449
5,391 4,778 4,329
7,893 6,995 6,338
10,995 9,745 8,830
3
rating. Use 1000 BTU/ft
Length in Feet
40' 50' 60' 70'
267 237 217 196
504 448 409 378
663 588 532 490
993 880 798 734
1,913 1,696 1,536 1,413
Length in Feet
40' 50' 60' 70'
105 94 86 80
188 168 153 141
284 251 227 209
625 559 509 471
1,472 1,317 1,203 1,114
Length in Feet
40' 50' 60' 70'
166 149 136 126
297 265 241 222
449 397 359 330
988 884 805 745
2,327 2,082 1,902 1,761
70' 80' 90'
127 118 111
239 222 208
490 456 428
734
683 641
1,413 1,315 1,234
1,165
2,253 2,096 1,966 1,857
3,983 3,705 3,476 3,284
5,831 5,425 5,090 4,808
8,123 7,557 7,091 6,698
3
for implied calculation.
80' 90' 100' 125'
185 173 162 146
346 322 307 275
456 428 404 358
683 641 605 536
1,315 1,234 1,165 1,033
80' 90' 100'
75 71 67
132 125 118
194 181 171
440 415 393
1,042 983 933
80' 90' 100'
118 112 106
208 197 186
307 286 270
696 656 621
1,647 1,554 1,475
100' 125'
104 93
197 174
404 358
605 536
1,033
1,646
2,910
4,261
5,936
150' 200'
132 112
252 213
511 440
787 675
1,496 1,260
150' 200'
55 48
94 82
137 116
320 277
762 661
150' 200'
87 76
143 129
217 183
506 438
1,205 1,045
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