You can also just use the follow me tool, at the start of the path draw circle perpendicular to the path. Make it simple say like 6 sides and 25 mm dia ( at normal viewing distance tha should noy show, slect the total path, then select the area of the circle and tha will extrude along the total path length. You can select that pipe and move a copy the 27 mm you want. Alternatively position path first and then do the follow me operation. Remember the comment about the primitive geo sticking together unless it is isolated.