Patent ID: 11885574
Assignee: SPX FLOW TECHNOLOGY DANMARK A/S
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  B | IPC B  F

Claim 12:
13. A method of manufacturing a hygienic food product to food product axial tubular heat exchanger that comprises metal tube plates at each opposite end of an elongated heat exchanger housing and tightly spaced axial metal tubes extending between the tube plates, each of the tubes having a corresponding pair of ends, the method comprising:
securing and hermetically sealing the metal tube plates at the opposite ends of the elongated heat exchanger housing, wherein an inwardly facing side of each of the metal tube plates smoothly transitions to an inner surface of the elongated heat exchanger housing;
inserting the ends of the tubes through corresponding holes in the tube plates;
creating a first welded joint at an inner face of the tube plate, the first welded joint on the inner face of the tube plate being welded from an inside of each respective metal tube and extending in a complete circumference of each tube at an intersection of the inner face of the tube plate and the respective tube; and
creating a second welding joint that is separate from the first welding joint at an outer face of the tube plate, each weld extending along the complete circumference of each respective tube by welding the tubes to the tube plates on the side of the tube plates that faces the interior of the elongated cylindrical housing for providing a smooth transition between the outer surface of a tube and the inwardly facing side of the tube plate.