Cylindrical pressure vessel having a defined leakage path

Cylindrical pressure vessel, specifically for applications in hydraulics, made of a fiber-reinforced synthetic material based on resin-impregnated fibers with an internal body and an external body enclosing the same, with the cylindrical section of the pressure vessel being closed by means of end caps at its two face sides and with the internal body and the external body being kept separate from each other in order to avoid a transfer of shear forces, characterized in that at least one end cap is connected only with the external body and contacts, with an overlap section intruding into the internal body, the inside surface of the internal body, with a seal being arranged in the overlap section of the end cap that contacts the interior circumferential surface of the internal body, and with at least one recess serving as a defined leakage path in case of an expansion of the external body relative to the internal body being arranged, on that side of the seal that faces away from the interior chamber of the cylindrical pressure vessel, in the interior circumferential surface of the internal body that encloses the overlap section of the end cap.