Pipe heater manufacturing method and pipe heater

Details Pipe heater manufacturing method and pipe heater Pipe heater manufacturing method and pipe heater

2006-05-09

2006-05-09

Campbell, Thor S. (Department: 3742)

Electric resistance heating devices

Heating devices

Continuous flow type fluid heater

C392S465000, C392S466000

Reexamination Certificate

active

07043151

ABSTRACT:
The pipe heater manufacturing process comprises a vacuum making process A for introducing a stainless steel pipe into a furnace and evacuating the inside of the furnace, for example, to a pressure of 0.5 Torr, a pipe end sealing process B for brazing and sealing plugs3to both ends of the pipe under vacuum and brazing, a process C for forming a lower insulating layer by repeating several times the steps of screen printing an insulating glass material and baking it in a state in which the two ends of the pipe are sealed, and similar formation process D of a heat generating layer and formation process E of an upper insulating layer. With this method, baking in an oxygen-free state inside the pipe makes it possible to obtain the oxidation-free clean state without high-temperature corrosion on the inside of the pipe having the fluid to be heated flowing therein and to manufacture a pipe heater in which a heating response was improved by forming thin heating layer and insulating layer.

REFERENCES:
patent: 5027425 (1991-06-01), Slomka
patent: 5557704 (1996-09-01), Dennis et al.
patent: 6376816 (2002-04-01), Cooper et al.
patent: 2002-83672 (2002-03-01), None
patent: 2002-313542 (2002-10-01), None

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