![Pipe Sizing - Natural Gas](/images/new-backgrounds/43631/4363167x1.webp)
Fuel Piping
Pipe Sizing - Natural Gas
1.Refer to Table 1 for pipe length and diame- ter requirements. Based on rated ELITE input (divide by 1,000 to obtain cubic feet per hour).
-Table 1 is based on Natural Gas with a specific gravity of 0.60 and a pressure drop through the gas piping of 0.30”w.c..
-For additional gas piping sizing infor- mation, refer to ANSI Z223.1. For Canadian installations refer to B149.1 or B149.2.
Natural Gas Supply Pressure Requirements
1.Pressure required at the gas valve inlet supply pressure port:
-Maximum 13”w.c. at flow or no flow conditions to the burner.
Pipe Sizing - Propane Gas
1.Contact the local propane gas supplier for recommended sizing of piping, tanks and 100% lockup gas regulator.
Propane Gas Supply Pressure Requirements
1.Adjust the propane supply regulator pro- vided by the gas supplier for 13”w.c. max- imum pressure
2.Pressure required at the gas valve inlet sup- ply pressure port:
-Maximum 13”w.c. at flow or no flow conditions to the burner
-Minimum 5”w.c. during flow condi- tions to the burner. Must be verified during start up.
- Minimum 5”w.c. during flow condi- tions to the burner. Must be verified during start up.
2.Install 100% lockup gas pressure regulator in the gas supply line if inlet pressure can exceed 13”w.c at any time. Adjust the lock- up pressure regulator for 13”w.c maximum.
Table 1: Gas piping sizing - Natural Gas
| Length of Pipe |
| Capacity of Pipe in Cubic Feet of Gas Per Hour |
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| in Feet | (based on 0.60 specific gravity, 0.30" w.c. pressure drop) |
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| SCH 40 |
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| 1/2" |
| 3/4" |
| 1" |
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| 10 | 132 |
| 278 |
| 520 | 1050 | 1600 |
| |
| 20 | 92 |
| 190 |
| 350 | 730 | 1100 |
| |
| 30 | 73 |
| 152 |
| 285 | 590 | 860 |
| |
| 40 | 63 |
| 130 |
| 245 | 500 | 760 |
| |
| 50 | 56 |
| 115 |
| 215 | 440 | 670 |
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| 75 | 45 |
| 93 |
| 175 | 360 | 545 |
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| 100 | 38 |
| 79 |
| 150 | 305 | 460 |
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| 150 | 31 |
| 64 |
| 120 | 250 | 380 |
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| 29 |
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