Abstract: The invention provides for a metallic cutting ring for a screw connection for sealingly connecting a tube to an attachment part, which metallic cutting ring has a tube abutment section and a cutting section which adjoins the tube abutment section in the axial direction. The cutting section having a stop which points radially outward from the outer periphery of the cutting ring and has a stop face, which runs transversely with respect to the cutting ring longitudinal axil, for the attachment part. The stop for the attachment part has an annular peripheral stop edge which projects beyond the stop face.

Abstract: The present invention relates to a device for the deformation of workpieces, in particular for the plastic shaping of pipe ends, with a shaping unit actuated by the pressure of a fluid and with a prestressing unit arranged on a common longitudinal axis and actuated by the pressure of a fluid and also with clamping elements of conical design which can be clamped by means of the prestressing unit, in each case at least one separate pressure space being designed in the shaping unit and in the prestressing unit, which space can be pressurized independently of the pressure space of the other unit in each case. In this connection, the shaping unit and the prestressing unit are interconnected but completely closed off in relation to one another.

Abstract: A pipe screw-connection for connecting a pipeline having a connection end with a deformed annular bead, including a connection stub and a screw-connection coupling part, which can be screw-connected to the connection stub in order to retain the pipeline in a sealed manner is provided. The connection stub has an accommodating opening with a radial step surface for axially supporting an end surface of the pipeline and with an inner cone which widens outward away from the step surface. The pipeline can be clamped in, by way of the annular bead, with a form fit between the connection stub and a supporting ring, which is seated on the pipeline between the annular bead and the screw-connection part. The supporting ring, with the annular bead, forms an abutment surface which is at an angle (?) considerably greater than 45° to the screw-connection axis.