Natural Gas Pipe Capacity Calculator
Formula for Calculating Flow Rate in Low-Pressure Natural Gas Pipelines
Application: Primarily used for selecting low-pressure natural gas pipelines, this tool helps determine the appropriate type and capacity of gas pipelines within residential and commercial buildings. Below is the formula for calculating the hourly natural gas flow rate in low-pressure (pressure below 1 psi) natural gas pipelines:
Formula Breakdown:
The larger the pipe diameter, the higher the flow rate.
The longer the pipe, the weaker the gas supply at the end.
The lighter the gas, the easier it flows.
Natural Gas Pipe Capacity Calculator
Enter values and calculate.
Natural Gas Pipe Size Conversion Chart (1/2“ to 4”)
| Nominal Size | Outside Diameter (OD) | Inside Diameter (ID) |
| 1/2″ | 0.840 in | 0.622 in |
| 3/4″ | 1.050 in | 0.824 in |
| 1″ | 1.315 in | 1.049 in |
| 1-1/4″ | 1.660 in | 1.380 in |
| 1-1/2″ | 1.900 in | 1.610 in |
| 2″ | 2.375 in | 2.067 in |
| 2-1/2″ | 2.875 in | 2.469 in |
| 3″ | 3.500 in | 3.068 in |
| 4″ | 4.500 in | 4.026 in |
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