Pipe flange forming method

摘要

A method for forming a flange at an open end of a pipe comprises increasing the diameter of the open end of the pipe to form a radially-enlarged pipe wall. Radially-symmetric portions of the radially-enlarged pipe wall are then removed so as to form at least two opposing projecting portions, which are then bent outwardly so as to be at least substantially orthogonal to the pipe, thereby forming the flange on the pipe.