Abstract: A pipe coupling for connecting two pipes, wherein the pipe coupling comprises at least one injection outlet for injecting lubricant. The invention further relates to a method, which is designed to be connected to a further pipe by way of such a pipe coupling, to a pipe union, to a method for injecting lubricant, and to a method for producing a pipe coupling.

Abstract: A method for producing a multilayer pipe with an outer layer which forms a pipe outer contour, an inner layer which forms a pipe inner contour, and at least one intermediate layer by means of a centrifugal casting process. A mixture of resin and microfibers is supplied to a rotating die in order to form the inner layer, and a specified separation of the resin and the microfibers is produced by controlling the die rotational speed during a specified time such that the content of the microfibers in a boundary layer, which starts from the pipe inner contour, is lower than the content in a stability layer facing the intermediate layer. The invention likewise relates to a corresponding multilayer pipe.