I'm currently redesigning my base, when I stumbled on this "bug" https://imgur.com/a/LwMigdN
Nothing major, but a "bug" no less.
This occurs in all directions with varying parts.
That doesn't happen for me. On my screen, the pipe graphics are aligned properly. Another mod may be interfering. The tooltip for the prismelter shows (in blue text at the top) which other mods are affecting the prototype.