Abstract: A connecting arrangement for connecting a pipeline to a connection piece of fuel or hydraulic systems is disclosed having a connecting element in the form of a union nut. A sealing head includes a sealing surface and a pressure surface and is provided at the end side of the pipeline. The union nut serves to press the sealing head by the sealing surface in a pressure-tight manner against a sealing seat formed in the connection piece. Leakage paths are provided at the rear side of the sealing head outside the sealing surface and the sealing seat. The leakage paths function as predetermined leakages and ensure that sealing outside the actual sealing region of the connecting arrangement is prevented.