| 摘要 |
<p>Described is a flange (30) for joining portions of pipe (100; 101) , comprising a hollow section designed to enter in a first portion of a pipe, designed to couple with a further and second flange (20) joined to a second portion of the pipe and allowing a flow of a fluid; the flange (30) comprises a face (31) for coupling with a face (21) of a second flange (20) ; the face (31) comprising a first and a second annular recess, the first and second annular recesses (34; 35) being concentric and separated from each other by at least one wall (37) with a discontinuous profile which makes a hydraulic seal, extending towards the outside of the recesses along a direction substantially parallel to the axis (X) of the flange and designed to make contact, in use, with a portion of the face of the second flange. The wall (3) has knurled profile with a plurality of tips designed to enter into contact in use with the face of the second flange. Inside the second annular recess (35) there is a third annular recess (36) having a depth greater than that of the second annular recess (35).</p> |
