Multi-wound stainless steel pipe

Details Multi-wound stainless steel pipe Multi-wound stainless steel pipe

1999-06-21

2000-10-24

Hook, James

Pipes and tubular conduits

Distinct layers

Bonded to each other

138143, 138171, F16L 9147

Patent

active

061351601

ABSTRACT:
A multi-wound stainless steel pipe produced by plastic-deforming a hoop material made of a stainless steel sheet applied with a Cu-brazing material on the surface thereof to a multi-wound pipe and after melting the brazing material between the walls of the multi-wound pipe, cooling the molten brazing material, wherein the Cu-brazing material between the walls and the Cu-brazing material at the surfaces of the inside surface and the outside surface of the pipe are diffused into the base material at a depth of from 0.5 .mu.m to 15 .mu.m and bonded thereto. The multi-wound stainless steel pipe is excellent in the pressure resisting strength and working strength and has a high quality.

REFERENCES:
patent: 3610290 (1971-10-01), Anderson et al.
patent: 3775194 (1973-11-01), Dromsky
patent: 4784311 (1988-11-01), Sugao
patent: 4867269 (1989-09-01), Lalikos et al.
patent: 5265793 (1993-11-01), Usui et al
patent: 5297410 (1994-03-01), Goff
patent: 5447179 (1995-09-01), Gibbs et al.
patent: 5458156 (1995-10-01), Okubo et al.
patent: 5553640 (1996-09-01), Ferenczy et al.
patent: 5958602 (1999-09-01), Usui

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