Pipes and tubular conduits – Longitudinally seamed – Permanent type seam
Patent
1995-05-24
1998-03-24
Scherbel, David
Pipes and tubular conduits
Longitudinally seamed
Permanent type seam
138 38, 138142, 138177, F16L 917
Patent
active
057301891
ABSTRACT:
An externally and internally enhanced welded tube formed from a strip having a thickness b. The tube includes an inner wall enhanced with a first desired pattern having a thickness of a. An outer wail is enhanced with a second desired pattern, the second desired pattern having a thickness c. The weld fusing a portion of adjacent longitudinal edges of the strip wherein a weld bead associated with said weld is recessed within said desired patterns, does not extend beyond said desired patterns, and the length of said portion of said adjacent longitudinal edges that is fused together is from about (b+0.05a+0.05c) to about (b+0.2a+0.2c).
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Dupy Jerome M.
Randlett Myron R.
Hook James F.
Olin Corporation
Rosenblatt Gregory S.
Scherbel David
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