Abstract: A tube body for a heat exchanger may include an outer structure composed of a band material. The outer structure may include two mutually opposite wide sides and two mutually opposite narrow sides delimiting an outer structure interior space. The tube body may further include an inner structure integrally arranged on the outer structure and composed of the band material. The inner structure may be arranged in the outer structure interior space and divide the outer structure interior space into at least two fluid ducts fluidically separated from one another through which a fluid is flowable. The band material may have a material thickness and, at least in certain portions, a material thickness of a portion of the band material defining the inner structure may be less than a material thickness of a portion of the band material defining the outer structure.

Abstract: A tube body for a heat exchanger may include an outer structure composed of a band material. The outer structure may include two mutually opposite wide sides and two mutually opposite narrow sides delimiting an outer structure interior space. The tube body may further include an inner structure integrally arranged on the outer structure and composed of the band material. The inner structure may be arranged in the outer structure interior space and divide the outer structure interior space into at least two fluid ducts fluidically separated from one another through which a fluid is flowable. The band material may have a material thickness and, at least in certain portions, a material thickness of a portion of the band material defining the inner structure may be less than a material thickness of a portion of the band material defining the outer structure.

Abstract: A method of forming a heat exchanger tube by folding a strip of heat conductive material into a “B” shaped double nosed tube. The strip is progressively plastically deformed to form a pair of corrugations, wherein each of the corrugations includes a series of alternating crests and web segments. An internal nose is defined by an outward extension of the outer most crest followed by an inward curve. The corrugations are then folded inward toward a surface of the strip forming a pair of folded corrugations defining a central wall along the first fold. The folded corrugations are then folded inward toward the same surface of the strip such that the central walls are tightly abutted against each other, and the internal noses are abutted up against a respective portion of the surface along the second fold, thereby forming the double nosed folded tube.