How much is the take-off for a 16" pipe in a 90° butt weld ell?

The take-off for a 16" pipe in a 90° butt weld elbow is 16 inches because the take-off refers to the amount of length that the fitting adds to the overall piping system. In the case of a 90° elbow fitting, the take-off is typically equivalent to the nominal diameter of the pipe itself.

Therefore, when dealing with a 16" pipe, the standard take-off measurement for a butt weld ell is the same as the nominal size of the pipe, which is 16 inches. This ensures that when planning and executing the layout of the piping system, you accurately account for the necessary length that the fitting represents, enabling proper fit and functionality in the assembly of the system.