Abstract: A roll forming apparatus including a plurality of stations each including and an upper roll and a lower roller, wherein a first number of stations are configured to form a pipe blank into a standing seam, and a second number of stations are configured to angle the seam. At least one station includes elongated top and bottom rollers for clinching the pipe blank during the roll forming process. Each elongated top roller is mounted on a pivotable shaft configured to pivot the elongated top rollers away the pipe blank to allow passage of at least one seam formed in the pipe blank.

Abstract: A crimping machine including a first shaft having a first crimping portion and a bead wheel and a second shaft having a tapered portion disposed opposite the bead wheel of the first shaft. The first and second shafts are configured to grip a pipe blank having a transverse channel including a first angle. The first and second shafts are further configured to roll the pipe blank forward while crimping a portion of the pipe blank with the first and second crimping portions and applying pressure on the transverse channel of the pipe blank. The crimping machine further has having a tapered portion disposed opposite at least a portion of the crimping portion and the bead wheel of the first shaft. The bead wheel is configured to push upon the forming shaft to bend the first angle of the transverse channel formed in the pipe blank to a second angle.