Most of these feel like just cluttered snapshots in industrial hallways, I have to say.
The B&W pipe ones stand out as being massively better IMO than the others. Interesting lines, repetition of elements, no weird clutter of plastic buckets and stuff, and the lighting models the shapes nicely, giving 3d feel. There's very little I would even change about that one, other than maybe cropping the white blur in the upper left.