Abstract: The present invention relates to a fitting device (10) for a tube-shaped workpiece (27) for use in internal combustion engine facilities. The fitting device (10) has a basic body (16) for the reception of the tube-shaped workpiece (27), the basic body (16) being positioned in the opening of the laminar component (15) and at least a part of the basic body (16) essentially being movable in a plane which is oriented parallel to the plane of the opening. Furthermore, the fitting device (10) has a frame element which holds the basic body (16) and is supported on the opening edge of the laminar component (15). The fitting device (10) is arranged in such a way that it covers the opening of the laminar component (15) after reception of the tube-shaped workpiece (27).