Method of forming stub ends

Details Method of forming stub ends Method of forming stub ends

1987-12-22

1989-08-15

Shaw, Clifford C.

Electric heating

Metal heating

For deposition welding

219 7611, 219 7614, 219137R, B23K 904

Patent

active

048576930

ABSTRACT:
A method of forming stub ends used for joining pipes together by depositing successive layers of weld metal on the outer circumference of a rotating length of pipe. Initial layers having a common forward edge but of decreasing width are deposited to provide metal for the machining of a radius joining the flange to the pipe. Thereafter, successive layers of weld metal of substantially the same width and the same common forward edge are deposited to form the flange. The method is preferably practiced by inert gas shielded pinch arc welding to provide an integral flanged stub end made up completely of weld metal. The resulting structure is substantially uniform and homogeneous with a desirable grain structure, and is pore and defect free. The method further provides economical manufacture of flanged stub ends with relatively little waste of materials.

REFERENCES:
patent: 2491878 (1949-12-01), Spagnola
patent: 2813190 (1957-11-01), Felmley
patent: 3139511 (1964-06-01), Kudelko
patent: 3316381 (1967-04-01), Gibson
patent: 3428774 (1969-02-01), Faust et al.
patent: 4409466 (1983-10-01), Commeau
Cary, Howard B. Modern Welding Technology. Englewood Cliffs, New Jersey: Prentice-Hall Inc., 1979, pp. 11-12, 715.

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