Pipeline Engineering

Natural Gas Pipeline - Flow Rate

Steel Pipe Dimensions

Select "Custom" for manual pipe OD and wall thickness inputs.
Select "Custom" from "Pipe Nominal Size" above for manual pipe OD and wall thickness inputs.
inch
inch

PE Pipe Dimensions

Select "Custom" for manual pipe OD and wall thickness inputs.
Select "Custom" for manual pipe OD and wall thickness inputs.
inch
inch
 
mile
ft

Gas Properties

°F
psig
 
cP
°F

Pipeline Design Parameters

psig
psig
ft
ft

Gas Flow Rate at Base Conditions, ft³/day (SCFD)

Colebrook0.2534
Modified Colebrook0.2535
AGA NB-130.2536
Weymouth0.2536
Panhandle A0.2536
Panhandle B0.2536
IGT0.2536

Gas Flow Rate - Colebrook

Friction factor calculated for pipe roughness and Reynolds number; most popular equation for general gas transmission pipelines.

Gas Flow Rate - Modified Colebrook

Modified Colebrook equation based on US Bureau of Mines experiments; gives higher pressure drop compared to original Colebrook equation.

Gas Flow Rate - Weymouth

Does not consider pipe roughness; uses an efficiency factor used for high-pressure gas gathering systems; most conservative equation that gives highest pressure drop for given flow rate.

 

Gas Flow Rate - AGA NB-13

Transmission factor calculated for partially turbulent and fully turbulent flow considering roughness, bend index, and Reynolds number.

 

Gas Flow Rate - Panhandle A

Panhandle equations do not consider pipe roughness; instead, an efficiency factor is used; less conservative than Colebrook or AGA.

Gas Flow Rate - Panhandle B

Gas Flow Rate - IGT

The IGT equation proposed by the Institute of Gas Technology is also known as the IGT distribution equation.