What is the formula to determine the take-off for a short radius 90° butt weld ell?

To determine the take-off for a short radius 90° butt weld elbow, the formula used is 1.0 times the pipe size. This means that for any given nominal pipe size, the length of the take-off can be directly equated to the size of the pipe itself.

For example, if you are working with a 2-inch pipe, the take-off length for the short radius elbow would be 2 inches. This straightforward approach allows pipefitters to ensure accurate measurements and fittings in their installations, maintaining efficiency and precision in their work.

The other options involve multipliers that are either too high or too low for the short radius configuration. Using these would result in inappropriate measurements, affecting the integrity of the assembly and potentially leading to issues in fit and function.