This is a ½ EMT pipe hanger.  My wife needed something that would hold a ½ EMT pipe for a trellis in her green house, so I designed this.  If you print it flat it won't need any supports, and it should be fairly strong.  I'm using it for a string trellis, but it could also be used in a closet if you needed it.  

It's made to slide the pipe through, and then there is a screw hole in the top to secure the pipe so it won't slide around.  

This will get the pipe about 5.25 inches off the wall.  

try it out and let me know how it goes.  If you need an edit I'll see what I can do.