Natural Gas Pipe Sizing Chart 5 PSI
Safety note: gas piping is not a guesswork project. This chart is for planning context only. Final natural gas pipe sizing must follow local code, the appliance manual, supply pressure, allowable pressure drop, regulator requirements, and inspection rules. Use a licensed gas fitter or qualified professional for real installations.
How To Read A 5 PSI Gas Pipe Chart
Natural gas pipe capacity depends on inlet pressure, outlet pressure, pipe length, pipe material, fittings, elevation, gas specific gravity, and acceptable pressure drop. Many charts express flow as cubic feet per hour, where 1 CFH is often estimated as about 1,000 BTU/hr for natural gas. Actual gas heating value can vary.
Natural Gas Capacity Chart For 100 Feet Of Steel Pipe
| Upstream PSI | Downstream PSI | 1/2 in | 3/4 in | 1 in | 1-1/4 in | 1-1/2 in | 2 in | 3 in | 4 in |
|---|---|---|---|---|---|---|---|---|---|
| 10 | 9.5 | 355 | 745 | 1,400 | 2,880 | 4,310 | 8,305 | 23,400 | 47,730 |
| 10 | 9.0 | 515 | 1,080 | 2,030 | 4,160 | 6,240 | 12,020 | 33,860 | 69,060 |
| 8 | 7.6 | 300 | 630 | 1,190 | 2,440 | 3,650 | 7,040 | 19,830 | 40,440 |
| 8 | 7.2 | 440 | 910 | 1,720 | 3,530 | 5,290 | 10,190 | 28,710 | 58,560 |
| 6 | 5.7 | 245 | 515 | 970 | 1,990 | 2,990 | 5,730 | 16,160 | 32,950 |
| 6 | 5.4 | 355 | 745 | 1,400 | 2,880 | 4,310 | 8,310 | 23,415 | 47,760 |
| 5 | 4.7 | 240 | 500 | 940 | 1,935 | 2,900 | 5,580 | 15,730 | 32,080 |
| 5 | 4.5 | 315 | 660 | 1,240 | 2,540 | 3,810 | 7,340 | 20,680 | 42,170 |
Units: values are commonly treated as approximate thousands of BTU/hr when using 1 CFH = about 1,000 BTU/hr. Verify the original chart basis before designing from these values.
Gas Pipe Sizing Checklist
- Add equivalent length for elbows, tees, valves, and fittings.
- Confirm the appliance input rating and required inlet pressure.
- Confirm regulator requirements for elevated pressure systems.
- Use the correct pipe material and approved joining method.
- Leak-test and inspect according to local code.
- Do not use online charts as final engineering or permit documents.
Source Notes
Safety framing and sizing concepts were cross-checked against fuel-gas pipe sizing references including Engineering ToolBox natural gas pipe sizing, gas pipe BTU supply charts, and code appendix guidance. Local code and licensed professional judgment control actual installations.
