Double-wall welded tube

Details Double-wall welded tube Double-wall welded tube

1985-03-18

1987-06-23

Marcus, Stephen

Pipes and tubular conduits

Distinct layers

Spaced

138151, 29455R, F16L 914

Patent

active

046745424

ABSTRACT:
The double-wall welded tube has two portions of the tube, in the region of which the weld (10) is located, which are each defined by the outer surface of a fold (6, 7) formed by the material constituting, in this region, the double wall of the tube. In this way, the regin in which the weld is effected is perfectly homogeneous and the weld can therefore be of very high quality.

REFERENCES:
patent: 1218895 (1917-03-01), Porter
patent: 2076643 (1937-04-01), Holt et al.
patent: 2203006 (1940-06-01), Young
patent: 2274519 (1945-10-01), Barrett
patent: 3058861 (1962-10-01), Rutter
patent: 3201861 (1965-08-01), Fromson et al.
patent: 3299417 (1967-01-01), Sibthorpe
patent: 3327383 (1967-06-01), Reed
patent: 3404445 (1968-10-01), Crouse
patent: 3434503 (1969-03-01), Knox
patent: 3880194 (1975-04-01), McNeal
patent: 4175882 (1979-11-01), Gilead
patent: 4404992 (1983-09-01), Sasaki et al.
patent: 4428420 (1984-01-01), Blakely

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