Instead of wrapping a thick layer of duck tape, cut 2 inch of that rubber tube that comes with the intake pipe. You know the tube that you connect to the intake pipe to the engine. When I got mine it was like 12 inches long. After you cut a small portion off, split it down the middle. Then just push it down on the a/c pipe. It will naturally contour to it. Then if you want duck tape it down, for me I use small zip ties on both side. Here's a picture of what Im talking about.
As you can see I replace the intake pipe back to stock cause I was getting tired of it. There was alot of rubbing on it but it didnt damage either parts.