Radius Bend in Skin Edge

  What diameter pipe would give you the radius you need? Just guessing 1 1/2" or 2" (there isn't much in the photo to get a reference from). Thinking out loud, wouldn't black iron pipe be better?  Seems that p.v.c. would tend to flex too much. With skin laid flat on table let the area to get the radius hang off the edge of the table, clamp the pipe down on both ends and start dolling a little at a time down the entire length of the pipe. Back and forth in small increments until you get what's needed. Many ways to skin a cat (sorry vikx) but it's the way I'd go. Oh, and use a rubber mallet.