The end to center of a 90-degree short radius elbow measures what size?

The measurement from the end to the center of a 90-degree short radius elbow is defined by the relationship of the elbow's radius to the nominal pipe size (NPS). For a 90-degree short radius elbow, this distance is equal to the nominal pipe size, or 1 times NPS. This means that for any given pipe size, the centerline radius of the elbow is designed to be precisely the same as the nominal diameter of the pipe.

In practical terms, this sizing is crucial for ensuring proper flow and fit in piping systems. The short radius elbow is favored in situations where space is limited, as it allows for a tighter bend compared to a long radius elbow. Understanding this measurement helps in both the selection and installation of piping components, ensuring that they conform to industry standards and function correctly in the system.

The other options, while they define additional sizes for different configurations like long radius elbows or other fittings, do not apply specifically to the short radius design, making them unsuitable in this context.