Plastic container for fluids and method for producing a plastic container

A plastic container for liquids, the plastic container being realized as a blow-molded body by blow molding from a tubular preform in a blow mold and having a container socket connected to a container fitting in a fitting connecting area of a container wall, the container socket being provided with a container opening and being connected to a connecting flange of the container fitting via a welded joint,

• wherein
• the container wall has an inner layer made of a first plastic material and an outer layer made of a second plastic material, and the container socket has a longitudinal cross section widening toward the container opening in such a manner that an end face of the container socket is formed at least in part by an inner layer segment disposed opposite the outer layer, and a welding contact surface of the container socket is formed by the inner layer segment
• wherein
• the container socket is cone-shaped in such a manner that the welding contact surface is formed by a wall surface of an inner cone, the inner cone being provided with the inner layer and being welded to an outer cone formed on a connecting piece of the container fitting.