Coupling system between flange and bellows in a metallic expansion joint with corrugated bellows

摘要

A coupling system between flange and bellows in a metallic expansion joint with corrugated bellows, provides for coupling a recess (9, 15, 21, 29) formed in the inner wall of a flange (5) with a projection (11, 17, 23, 31) formed in the end portion of the bellows (1) to be joined, said coupling being sealed by one or more gaskets (13, 27) located upwards of or at said coupling. In case a more tight condition and a stronger mechanical resistance to axial strains are desired, an elastic ring (19, 25, 33) is provided acting inside said projection (17, 23, 31).