Joining component for receiving and / or guiding a fluid

The invention relates to a joining component for receiving and / or guiding a fluid to a first partial shell having a first outer surface, a first inner side and an opening provided at the first inner side of the first joining surface and a second partial shell having a second outer surface, a second inner side and an comprises the second inner side provided second joint surface. Here, the first and the second partial shell to the first and second joining surface are connected to each other via a connecting seam and form at least two channels for receiving and / or guiding of the fluid. The at least two channels are separated in an inner portion by the joining seam from each other and in the inner portion a extending along the connecting seam cavity is provided. In the first and / or second partial shell has an opening for checking the quality of the weld between the first joining surface and the first outer side and / or the second joining face and the second face at least is arranged. In this case, the cavity is connected to the at least one opening so that the fluid at least partially emerges from the first and second outer side in a loss of quality of the joint.