Gas Pipe Sizing Calculator
Size natural gas and propane piping per code
Appliance Load (BTU/hr)
Sizing Results
Total Load
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Demand (CFH)
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Required Pipe Size
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Pipe Capacity
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Utilization
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Branch Sizing
| Appliance | BTU/hr | CFH | Min Size |
|---|
Gas Pipe Capacity Reference (CFH)
Natural gas, 0.5" WC pressure drop, 0.60 specific gravity
| Pipe Size | 10 ft | 20 ft | 30 ft | 50 ft | 100 ft |
|---|---|---|---|---|---|
| 1/2" | 175 | 120 | 97 | 75 | 52 |
| 3/4" | 360 | 250 | 200 | 155 | 108 |
| 1" | 680 | 465 | 375 | 290 | 200 |
| 1-1/4" | 1400 | 950 | 770 | 590 | 410 |
| 1-1/2" | 2100 | 1430 | 1150 | 890 | 620 |
| 2" | 3950 | 2700 | 2150 | 1680 | 1170 |