Process for manufacturing ribbed tubes and ribbed tubes thus man

Details Process for manufacturing ribbed tubes and ribbed tubes thus man Process for manufacturing ribbed tubes and ribbed tubes thus man

1998-07-15

2000-04-25

Hook, James

Pipes and tubular conduits

With flow regulators and/or baffles

Heat transfer

138144, 138142, 138177, 138178, F15D 100

Patent

active

060532092

ABSTRACT:
The invention concerns a process for manufacturing ribbed tubes, wherein a stainless steel tube is provided with ribs by helicoidally winding a copper strip around it, and a ribbed tube thus manufactured. In joining the tube and rib, the unmelted copper strip is set on the tube surface edgewise into a melted area produced by a laser beam exclusively on the tube surface, thereby bonding the strip onto the tube by the solidification of the melted tube material. In this manner ribbed tubes can be provided, featuring an internal tube made of corrosion-resistant stainless steel and a helicoidal rib made of copper for increasing the heat exchange surface of the tube, which is distinguished by high thermal conductivity.

REFERENCES:
patent: 1928639 (1933-10-01), Berg
patent: 3773241 (1973-11-01), Norris
patent: 3909898 (1975-10-01), Hicks
patent: 4353162 (1982-10-01), Van Meteren
patent: 4841617 (1989-06-01), Schmidt et al.
patent: 4969255 (1990-11-01), Schmidt et al.
patent: 5343015 (1994-08-01), Ryan
patent: 5809647 (1998-09-01), Wagner et al.

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