Methods and apparatuses for additively manufactured tubular passages, additively manufactured manifolds, and additively manufactured heaters are provided.

The fluid connector assembly includes a connector body with an intermediate portion that extends between opposite end portions and has a first bore. The connector body has an elongated wall that projects outwardly from the intermediate portion and that surrounds a second bore which opens to the first bore. A flat tube, which is made of a second material that is different than the first material and has at least one fluid passage, is in fluid communication with the second bore of the connector body. The flat tube has generally flat side walls and is lockingly retained with the connector body by male and female locking structures that cooperate with one another.

Methods and apparatuses for additively manufactured tubular passages, additively manufactured manifolds, and additively manufactured heaters are provided.

A casing for gas including a first channel section through which gas flows and a second channel section intersecting with the first channel section, the first channel section having an intersecting part that intersects with the second channel section, the intersecting part being formed to have a rounded quadrangular cross section and having a flat part, the second channel section intersecting with the first channel section to open at the flat part.

A flow substrate comprising a substrate body formed from a solid block of a first material, the substrate body having a first surface and a second surface opposing the first surface, a plurality of pairs of component conduit ports defined in the first surface of the substrate body, a plurality of fluid pathways extending between each respective pair of component conduit ports and in fluid communication with each component conduit port of the respective pair of component conduit ports, each respective fluid pathway being formed in the second surface of the substrate body; and at least one cap formed from a second material, the at least one cap having a first cap surface that is constructed to seal at least one fluid pathway, and a second cap surface opposing the first surface, wherein the substrate body includes an opening configured to couple with the at least one cap.