Abstract: The invention refers to a multiple layer extruded sprinkler tube (10), formed by an internal, an intermediate and an external layer (12, 14 and 16) made of a polypropylene basis, in which at least the external layer (16) has a fire arresting additive and the intermediate layer (14) includes glass particles with a weight proportion of 10% to 50%.

Abstract: An extruded, injection-molded or blow-molded plastic member for pipelines used for transporting liquid, pasty, and gaseous media has a tubular body with an outer layer, an intermediate layer, and an inner layer, wherein the inner layer is in contact with a medium to be transported. The inner layer and the outer layer are made of a basic material and the intermediate layer is made of a basic material and an additional material. The basic material of the inner layer and of the intermediate layer is a polymer material having amorphous areas. Additives against aggressive media are embedded in the amorphous areas of the polymer material of at least one of the inner layer and the intermediate layer. The additional material in the intermediate layer is a barrier material embedded in the amorphous areas of the polymer material of the intermediate layer for reducing additive migration.

Abstract: An extruded, injection-molded or blow-molded plastic member for pipelines used for transporting liquid, pasty, and gaseous media has a tubular body with an outer layer, an intermediate layer, and an inner layer, wherein the inner layer is in contact with a medium to be transported. The inner layer and the outer layer are made of a basic material and the intermediate layer is made of a basic material and an additional material. The basic material of the inner layer and of the intermediate layer is a polymer material having amorphous areas. Additives against aggressive media are embedded in the amorphous areas of the polymer material of at least one of the inner layer and the intermediate layer. The additional material in the intermediate layer is a barrier material embedded in the amorphous areas of the polymer material of the intermediate layer for reducing additive migration.