Pipes. Beams. Ductwork. These things are generally hidden in our homes behind walls, in ceilings, and within soffits. Sometimes, however, it pays to leave some of these tubes, conduits, and structural elements exposed to serve as edgy decorative statements. Done right, this approach can lend an industrial flair to any space, but the key here is “done right.” If you don’t take special care in showing off what's usually concealed, you’ll end up with spaces that look unfinished rather than…