Bag with welded rigid plastic part

The invention relates to a bag for receiving, providing and manufacturing of dialysis solution. In particular, the invention relates to a bag with a sealing Umfassungslinie and a part connected to the foil material rigid hard plastic part. The hard plastic part is separately connected from the sealing Umfassungslinie with the film material and provides an engagement surface for attachment of the bag, without having to act directly on the mechanically sealing Umfassungslinie.