Chemical conversion plug to achieve gas tightness

Details Chemical conversion plug to achieve gas tightness Chemical conversion plug to achieve gas tightness

1993-05-03

1993-12-21

Heinrich, Samuel M.

Metal fusion bonding

Process

Plural joints

228176, 228119, 29890031, B23K 3102, B23K10114

Patent

active

052715507

ABSTRACT:
A method and apparatus for sealing the gap between adjacent boiler tubes of a panel wall thereby making the panel wall air-tight. First and second sealing members are secured to opposite sides of adjacent boiler tubes thereby defining a gap therebetween. This gap is then filled with a metal salt solution which is dried in place so as to leave a residue behind. Subsequently, this residue is further heated which converts it to a metal oxide that forms an air-tight ceramic plug. This plug possesses properties which make it resistant to deterioration once the panel wall goes into service.

REFERENCES:
patent: 4924481 (1990-05-01), Vaughn

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