Unfortunately I'm going to have to reject these under the grounds that they don't quite live up to the standards of the section. The use of two colors makes them look particularly flat, rather than tube shaped, and the heavy black outlines (while consistent with smw) make them look not particularly transparent. This, alongside the fact a similar graphic that is more "complete" in the section exists is enough to not accept it.
I suggest taking a look at some glass tubes, and maybe try and emulating that look a bit? See how a white outline and some more colors look, and take a look at some cylinders/real pipes. I feel like that would help a lot, even when trying to emulate SMW as close as possible.