| 摘要 |
The pipe (2) is inserted in the through-hole of the flange (1) and the pipe-flange seal is assured by a fixing ring nut (6) screwed into the upper portion (5) of the hole. The hole, in the part opposite the threaded area (5), has an area (4) with a diameter equal to that of the pipe (2) and a truncated-cone coupling area (4) between the two areas (5) and (7). A ring (8) of elastomeric material is inserted inside the truncated-cone portion (7) and an annular projection (9) on the pipe (2) acts thereon, pushed by the screwing action of the ring nut (6).
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