Gas Pipes Capacity

Overview

Engineering reference data for Gas Pipes Capacity in piping systems.

Key Formulas

Continuity

$A_1 v_1 = A_2 v_2$

Mass conservation in pipe flow.

Pressure Drop

$\Delta P = f \frac{L}{D} \frac{\rho v^2}{2}$

Darcy-Weisbach equation.

Pipe Area

$A = \frac{\pi D^2}{4}$

Cross-sectional area of a pipe.

Variables

Symbol	Description	Unit
$D$	Pipe diameter	m
$v$	Flow velocity	m/s
$\Delta P$	Pressure drop	Pa
$f$	Friction factor	—

Gas Carrying Capacity Table

Sizing Notes

• The table applies to low-pressure gas systems with *specific gravity 0.6 (natural gas).
• Pressure drop is assumed as 0.3 inches of water column over the entire pipe length.
• Pipe lengths and capacities are based on standard steel or copper tubing.
• For multi-apartment buildings, use the "Sizing Low Pressure Gas Service Pipes" guideline to determine the required pipe size for connecting multiple units through a common service pipe.
• Capacities decrease significantly with longer pipe runs due to friction losses.

Interactive Charts

References

• Original Source