CAD 3D drawing is not other 3D software. There is no such thing as bending. You must draw a curve. According to the size, there are several drawing methods, one is to sweep the curve trajectory, and the other is to cut an elbow from the ring in the 3D drawing through shell extraction and different angles, and then assemble it with a straight elbow. These two are the most commonly used.

The pipeline scanned by simulation curve and fitting curve can be deformed again: