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Loose metal sealing flange

2014 
The utility model relates to a loose metal sealing flange. The loose metal sealing flange comprises a first metal pipeline, a loose flange, a lap joint flange edge, a metal sealing ring, an inner welding flange and a second metal pipeline, wherein the outer wall of the first metal pipeline is sleeved with the loose flange, an annular end of the first metal pipeline is connected with a concave platform on one side of the lap joint flange edge, a lap joint flange edge body is arranged in a concave platform of the loose flange, the metal sealing ring is located between the lap joint flange edge and the inner welding flange, the outer wall of the second metal pipeline is sleeved with the inner welding flange, an annular end of the second metal pipeline is connected with a concave platform of the inner welding flange, the lap joint flange edge adopts a circular ring structure, a concave ring part, a blade and a positioning part are sequentially arranged on the other side of the lap joint flange edge in the radial direction, the blade is located between the concave ring part and the positioning part, the concave ring part is arranged in a position close to the center of the circular ring structure, and the positioning part is arranged in a position far away from the center of the circular ring structure.
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