Pipe connection in grasshopper

Dear community.

I would like to connect several pipes with one cylinder. The inspiration of the connection of the single tubes with the cylinder should look like on the photo.

Here is a picture of my modell:

The cut of a single tube with the brep was created using the split function, then the cut tube was multiplied using the Polar Array function. Unfortunately the cut tube is an open polysurface after the bake function in Rhino and I can’t 3D print the model this way. Can anyone please give me a tip on how to convert the cut tube back to a brep and then reassemble it with the cylinder?
19082020_forum.gh (48.8 KB)

19082020_forum_re.gh (50.1 KB)

many thanks for your quick reply