Patent ID: 7000953

Claim:
A pipe screw-connection for connecting a pipeline having a connection end with a deformed annular bead, comprising 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, the connection stub having 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, it being possible for the pipeline to be clamped in, by way of the annular bead, with a form fit between the connection stub and a supporting ring which is being seated on the pipeline between the annular bead and the screw-connection part, wherein the supporting ring, together with the screw-connection part, forms a conical abutment surface which is at an angle (β) of approximately 45° relative to the screw-connection longitudinal axis, such that the pipeline is clamped in radially in this region, and wherein the supporting ring, together with the annular bead, forms an abutment surface which is at an angle (α) considerably greater than 45° relative to the screw-connection axis, such that, when the screw-connection is tightened, this region is essentially free of radial force components, so that the supporting ring is pressed radially only by means of and in the area of the conical abutment surface with the screw-connection coupling part, which results in the pipeline being clamped radially precisely only in a non-deformed pipe region, which is spaced apart from the annular bead.