Pipes and tubular conduits – Distinct layers – Bonded to each other
Patent
1993-06-28
1995-09-05
Bryant, III, James E.
Pipes and tubular conduits
Distinct layers
Bonded to each other
138140, 138141, 138172, 228127, F16L 914
Patent
active
054471796
ABSTRACT:
A seamless double-walled metal tube which has an outer wall composed of steel having a face-centered cubic grain structure, an inner wall concentrically disposed within the outer wall, the inner wall composed of a steel having a face-centered cubic grain structure, the inner wall having an outerwardly oriented surface directed toward an inwardly oriented surface of the outer wall. The seamless double-wall metal tube also has an intermediate bonding metal region interposed between and metallurgically bonded to the inner wall and the outer wall. The intermediate bonding region is composed of a metal capable of metallurgically bonding with the inner wall and the outer wall. The seamless double-walled metal tube can be produced by instantaneously elevating the temperature of the surface of the steel employed in an unsealed double-walled metal tube to a brazing temperature while maintaining the tube material in a humidified gaseous atmosphere; maintaining the surface temperature of the steel tube for an interval sufficient to permit fusion between the metal capable of metallurgically bonding with the steel in the inner and the outer wall; after metal fusion has been achieved, allowing the resulting fused metal material to cool to a first lowered temperature at a rate which retards the formation of fine-grained steel crystals in the metal; and after reaching a metallurgical transformation point, rapidly cooling the fused tube to a temperature below which the metal capable of metallurgical bonding is not reactive with oxygen.
REFERENCES:
patent: 1431368 (1922-12-01), Bundy
patent: 1531730 (1925-03-01), Bundy
patent: 1537404 (1925-05-01), Bundy
patent: 1650321 (1927-11-01), Bundy
patent: 1685269 (1928-09-01), Bundy
patent: 1688178 (1928-10-01), Drevitson
patent: 1763755 (1930-06-01), Bundy
patent: 1827381 (1931-10-01), Bundy
patent: 1863874 (1932-06-01), Quarnstrom
patent: 1875885 (1932-09-01), Quarnstrom
patent: 1892607 (1932-12-01), Bundy
patent: 1895133 (1933-01-01), Quarnstrom
patent: 1896371 (1933-02-01), Quarnstrom
patent: 1909501 (1933-06-01), Quarnstrom
patent: 2014982 (1935-09-01), Quarnstrom
patent: 2014983 (1935-09-01), Quarnstrom
patent: 2018089 (1935-10-01), Quarnstrom
patent: 2092018 (1937-09-01), Quarnstrom
patent: 2197191 (1940-04-01), Nichols et al.
patent: 2373116 (1945-04-01), Hobrock
patent: 2380107 (1945-07-01), Hobrock
patent: 2720022 (1955-10-01), Snively
patent: 2772121 (1956-11-01), Meissner
patent: 2996799 (1961-08-01), Gaul
patent: 3007810 (1961-11-01), Hobrock
patent: 3076260 (1963-02-01), Roehl
patent: 3077661 (1963-02-01), Fromson
patent: 3220107 (1965-11-01), Clark
patent: 3350771 (1967-11-01), Durst
patent: 3355795 (1967-12-01), Clark
patent: 3382052 (1968-05-01), Clarke
patent: 3389455 (1968-06-01), Clarke
patent: 3400449 (1968-09-01), Maguire et al.
patent: 3417453 (1968-12-01), Clarke
patent: 3434200 (1969-03-01), Russell
patent: 3457626 (1969-07-01), Coad
patent: 3566741 (1971-03-01), Sliney
patent: 3610290 (1971-10-01), Anderson et al.
patent: 3798011 (1974-03-01), Sharp
patent: 4016008 (1977-04-01), Jones et al.
patent: 4505232 (1985-03-01), Usami et al.
patent: 4593446 (1986-06-01), Hayner
patent: 4943489 (1990-07-01), Kuhara et al.
patent: 5042710 (1991-08-01), Siemers et al.
patent: 5145103 (1992-09-01), Johnson
patent: 5222652 (1993-06-01), Gibbs et al.
patent: 5265793 (1993-11-01), Usui et al.
patent: 5297410 (1994-03-01), Goff
patent: 5297587 (1994-03-01), Johnson
Metals Handbook 9th Ed vol. 6, pp. 1006-1013.
Nicht rostende staehle, 2nd edition of the Deutsche verein fur Eisen huetten leute, publ. in 1989 (p. 21, FIG. 207).
Din-Pocket book 155, Published by Boyd Verlag in 1981; Stahlundeisen Goethen Orment p. 236.
German Patent Office-Published for Opposition Jun. 13, 1991, DE 40-10 178C1.
The Making Shaping and Treating of Steel, 8th Ed McGannon, Harold E. Ed, US Steel Corp. pp. 1111-1130.
Metals Handbook Ninth Ed., vol. 3, pp. 16, 17 "Pipe, tubes and Tubing", copyright 1980.
Gibbs Glen
Johnson Arnold T.
Bryant III James E.
ITT Corporation
Lewis J. Gordon
Seitter Robert P.
LandOfFree
Non-corrosive double-walled steel tube characterized in that the does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Non-corrosive double-walled steel tube characterized in that the, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-corrosive double-walled steel tube characterized in that the will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-467257