Tube connection device

The arrangement (1) has a connection fitting (2) encompassing a pipeline (4) in a region of a flange (5) e.g. e-flange or f-flange, and including a front side press surface (11) that contacts a rear side surface (14) of the flange. A sealing surface (15) is pressed by axial movement of the fitting in contact with a contact surface (13) of a connection element (8). The fitting comprises a stop element (12) contacting the contact surface and limiting or interrupting the axial movement of the fitting. The stop element rests at the contact surface in case of the axial movement of the fitting.