Method of manufacturing internally grooved tubes for heat exchan

Details Method of manufacturing internally grooved tubes for heat exchan Method of manufacturing internally grooved tubes for heat exchan

1996-03-20

1997-05-13

Heinrich, Samuel M.

Metal fusion bonding

Process

With shaping

2281736, 29890045, 138 38, B21C 3715

Patent

active

056284470

ABSTRACT:
In a method for producing internally grooved tubes for heat exchangers, a smooth metal tape is drawn from a circular supply, a rolling mill provides it with a number of grooves that are parallel to each other and run at an angle of 15.degree. to 45.degree. with respect to the lengthwise direction of the tape, the tape is continuously formed into a tube with a lengthwise slot, and the slot is welded. At least two groups of parallel grooves are rolled into the surface of the metal tape so that the grooves form a herringbone pattern.

REFERENCES:
patent: 3906605 (1975-09-01), McLain
patent: 3921883 (1975-11-01), McLain
patent: 5184674 (1993-02-01), Keyes
patent: 5219374 (1993-06-01), Keyes
patent: 5343699 (1994-09-01), McAlister
patent: 5494209 (1996-02-01), Randlett et al.

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