Enhance bezier shape to have thickness to make a pipe.

I am trying to make a smoothly curving pipe, and the bezier shape is 90% what I want. If it had a thickness setting so that it would be dope.

My workaround makes what I want but it very tedious:
Use the bezier shape to make the outside of the pipe exactly what I want,
then duplicate the shape, reduce it's radius, flip the normals, merge the 2 shapes,
then at one end, I select the corresponding edge from the internal and external shapes, and "Bridge Edges", repeat till the end is closed,
then repeat for the other end.

AND if at any time after merging the objects, I adjust one of the bezier settings (like grabbing and moving a handle), then both objects radii are reset to the same thing and I have to undo al the way back to before merging.