Abstract: A procedure and an apparatus for forming a rectangular collar at the end of a pipe (34) by shaping it includes a forming element (1) which is moved in the axial direction of the pipe towards the pipe and rotated along the interior surface of the pipe end about the longitudinal axis of the pipe. The forming cone (1) is moved in the axial direction of the pipe towards the pipe so that, as it moves towards the pipe, the forming element (1) is automatically turned from an initial position to a final position by the thrust producing the movement, simultaneously forming the pipe end so as to produce a collar substantially rectangular with respect to the direction of the longitudinal axis of the pipe.

Abstract: A procedure and an apparatus for forming a rectangular collar at the end of a pipe (16) shape the pipe using a forming element (8) which is moved in the axial direction of the pipe (16) towards the pipe (16) and rotated along the edge surface of the pipe end about the longitudinal axis of the pipe. In the procedure, a conical collar is first produced, whereupon the forming element (8) is moved in the axial direction of the pipe away from the pipe (16) and turned to a position where its forming face is substantially perpendicular to the longitudinal axis of the pipe, whereupon a rectangular collar is formed.