It has to be bent to the same radius as a long radius 3" sch 40 90's and 45". I have found a couple places that said they could bend my angles, but couldn't do mutiple bends on the same spool. We haven't seen an actual built unit yet to see how it's been done in the past so we don't know what our options can be. Some of the spools have multiple bends in them according to the drawings like they were mandrel bent. The place I've found said that they would put waves on the inside bend radius and reduce the wall thickness on the outside of the bend by up to .156.