How is the radius of a long radius elbow often measured?

The radius of a long radius elbow is most commonly measured using the centerline radius. This method involves measuring the distance from the center of the pipe to the center of the elbow's bend, which provides a consistent and standardized way to define the curvature of the elbow. The centerline radius is integral in pipefitting, as it influences how the elbow connects with adjoining pipes and fittings, impacting the flow and pressure of the fluid within the system.

Measuring the radius in this manner allows for accurate calculations when determining how much space the elbow will occupy in a layout and ensures compatibility with other piping components. The centerline radius is particularly important for maintaining smooth fluid dynamics, as elbows with a smoother and longer radius tend to create less turbulence, facilitating better flow characteristics.