What is the take-off of 4" in 45° butt weld ells?

The take-off of a fitting generally refers to the length of pipe that needs to be cut to accommodate the fitting when it is attached. For a 4-inch pipe with a 45-degree weld elbow, the take-off is determined by the angle of the elbow and the diameter of the pipe.

In the case of a 4" 45° butt weld elbow, the take-off is typically around 2 1/2 inches. This length is based on standard calculations that consider the dimensions and angles of the fitting. The 2 1/2-inch measurement allows for metal loss from the welding process and ensures proper alignment when the fitting is utilized in a piping system.

This measurement is essential for ensuring that the pipe lengths, when measured and cut correctly, allow for the effective and efficient installation of the piping system. Getting the take-off correct ensures that there is minimal waste and that the system performs as designed.