[Paul F]

60 amp is enough capacity (if that's the maximum output) for light-weight steel such as muffler pipe. Questionable for pipe-to-flange weld. You will be very disappointed.

As already said, get a Lincoln or Miller 220V input, 150amp (minimum output) MIG welder. MIG is easy to use, but for that type of project, a novice will have trouble making a good-looking weld. MIG is great for general-purpose welding.

For maximum control, appearance and flexibility, get
TIG. It is very expensive and more difficult to learn. But once you know how, you will really like it. TIG is much more versatile, being able to do excellent steel, stainless, and aluminum projects