Method for manufacturing a compound pipe
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United States of America Patent
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-
Dec 3, 1991
Grant Date -
N/A
app pub date -
May 31, 1990
filing date -
Jun 1, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of preparing a compound pipe, the wall of which comprises an inner layer of a first material and an outer layer of a second material. Powders of the two materials are isostatically hot pressed to form a cylindrical tubular blank in which the first material forms an inner layer and the second material forms an outer layer, the blank after heating to a suitable temperature being extruded over a mandrel.
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