An apparatus comprising: (a) a base structure; (b) a seamer head frame mounted to and horizontally movable relative to the base structure; (c) a seamer head carrier mounted to and vertically movable relative to the seamer head frame; (d) a seamer head mounted to the seamer head carrier; (e) rotation means, for providing relative rotation about a rotational axis of the seamer head as between a tubular member and the seamer head; and (f) axial movement means, for providing relative axial movement as between the tubular member and the seamer head; said apparatus being characterised in that it further comprises alignment means for aligning the rotational axis (X-1) of the seamer head with the centerline of the tubular member disposed within a spindle bore of the seamer head parallel to the rotational axis, said alignment means comprising: (g) positioning means to adjust the spatial position of the seamer head in a direction transverse to the rotational axis, said positioning means comprising: (g.1) horizontal positioning means, for adjusting the horizontal position of the seamer head frame relative to the base structure; and (g.2) vertical positioning means, for adjusting the vertical position of the seamer head carrier relative to the seamer head frame; (h) centerline sensor means (120H, 120V, 130) to sense the spatial position of the tubular member's centerline where the tubular member passes through the spindle bore; and (i) control means, said control means being adapted: (i.1) to receive centerline position data from the centerline sensor means; (i.2) to determine the spatial position of the tubular member's centerline based on received centerline position data; (i.3) to compare the spatial position of the tubular member's centerline relative to the seamer head's rotational axis; and (i.4) to actuate the positioning means as necessary to move the seamer head in a direction transverse to the seamer head's rotational axis so as to bring the rotational axis into substantial concentricity with the tubular member's centerline at the location of the seamer head. (a) a base structure; (b) a seamer head frame mounted to and horizontally movable relative to the base structure; (c) a seamer head carrier mounted to and vertically movable relative to the seamer head frame; (d) a seamer head mounted to the seamer head carrier; (e) rotation means, for providing relative rotation about a rotational axis of the seamer head as between a tubular member and the seamer head; and (f) axial movement means, for providing relative axial movement as between the tubular member and the seamer head; (g) positioning means to adjust the spatial position of the seamer head in a direction transverse to the rotational axis, said positioning means comprising: (g.1) horizontal positioning means, for adjusting the horizontal position of the seamer head frame relative to the base structure; and (g.2) vertical positioning means, for adjusting the vertical position of the seamer head carrier relative to the seamer head frame; (g.1) horizontal positioning means, for adjusting the horizontal position of the seamer head frame relative to the base structure; and (g.2) vertical positioning means, for adjusting the vertical position of the seamer head carrier relative to the seamer head frame; (h) centerline sensor means (120H, 120V, 130) to sense the spatial position of the tubular member's centerline where the tubular member passes through the spindle bore; and (i) control means, said control means being adapted: (i.1) to receive centerline position data from the centerline sensor means; (i.2) to determine the spatial position of the tubular member's centerline based on received centerline position data; (i.3) to compare the spatial position of the tubular member's centerline relative to the seamer head's rotational axis; and (i.4) to actuate the positioning means as necessary to move the seamer head in a direction transverse to the seamer head's rotational axis so as to bring the rotational axis into substantial concentricity with the tubular member's centerline at the location of the seamer head. (i.1) to receive centerline position data from the centerline sensor means; (i.2) to determine the spatial position of the tubular member's centerline based on received centerline position data; (i.3) to compare the spatial position of the tubular member's centerline relative to the seamer head's rotational axis; and (i.4) to actuate the positioning means as necessary to move the seamer head in a direction transverse to the seamer head's rotational axis so as to bring the rotational axis into substantial concentricity with the tubular member's centerline at the location of the seamer head.