Line made up of two parts. The first one is a pressing line starting with a strip to make the right or left part of the elbow. The strip is inserted in the press where a suitable mobile die cuts the piece before forming. Transfer with 3 arms to pass from the cut to the forming and then trimming (with scrap) and then unloading/stacking. Unloading stacking with automatic descent and automatic displacement of the package. The second part is a seam folding machine for the two parts (right-left) of the elbow. With hydraulic sequencing the seaming of the two pieces is carried out prepared in the adjacent press. This solution as regards to the solution of horizontal seaming of 56201D allows the saving of about 7% of material, and not having seaming on the bottom of the elbow.