Glass-lined pipes

Details Glass-lined pipes Glass-lined pipes

1986-07-03

1987-10-27

Kittle, John E.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Making composite or hollow article

65 594, 138141, 138143, 428552, 428 36, 428433, 428408, B22F 704

Patent

active

047028840

ABSTRACT:
A method of producing a glass-lined metal pipe in which an unconsolidated tal or metal alloy powder is loaded into a sealable glass mold comprising a graphite core, a glass sleeve slipped over the graphite core with a sliding fit, a sealable outer glass envelope surrounding the graphite core and glass sleeve forming with them a sealable chamber for the metal or metal alloy powder, wherein the glass is a type which becomes plastic when heated. The air in the mold is removed under vacuum and the mold is sealed and placed into a free flowing refractory powder in a crucible and consolidated by sintering under atmospheric pressure (CAP.RTM. process). Removal of the glass envelope and the graphite core produces a glass-lined pipe in which the glass liner is slightly fused into and is under compressive force from the surrounding metal pipe.

REFERENCES:
patent: 300410 (1884-06-01), Tichenor
patent: 2308473 (1943-01-01), Wadman et al.
patent: 2986847 (1957-09-01), Sato
patent: 3246973 (1966-04-01), Bange et al.
patent: 4311505 (1982-01-01), Yasui et al.

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