| 摘要 |
A one-piece flange ring for mounting in an open pipe includes a flange, an outer and an inner leg projecting from the flange, and an outer and an inner annularly projecting land for engaging the inner wall of the pipe. The outer leg is closer to the inner wall of the pipe than the inner leg when installed in the pipe. The outer and the inner leg are substantially parallel to one another and a capable of being fixed under stress with respect to the flange by the inner wall of the pipe when the legs are driven into the open pipe. The outer and the inner pipe engaging lands have an outer diameter greater than the inner diameter of the pipe before installation in the pipe, and they are flexed under stress toward the center of the pipe when the flange ring is installed in the pipe. The outer and the inner pipe engaging lands have an outer diameter equal to the inner diameter of the pipe after installation in the pipe. The outer and the inner pipe engaging lands are bent diagonally toward the flange. The flange includes two parallel faces, an outer face and an inner face. The outer face projects substantially perpendiculary from the outer leg. The inner face projects substantially perpendiculary from the inner leg.
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