Black pipe works great also. The EMT is an off the shelf solution as it comes in ten foot sticks, has threads on both ends,and each stick comes with a coupling that is much smaller than a normal one
1/2" (sometimes 3/4") black pipe is pretty standard. However, we often use 1" sq tube (.065) in 10' sections, with a splice of 1/2" black pipe. The splice is spot welded into one end of the square tube, with 12" or so protruding. Then we sleeve that into the next piece, and just wrap a piece of gaff around the joint. No chance of snagging and tearing your pipe pocket, and we've not had a problem feeding them back out.