Dual graphite structured pipe
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United States of America Patent
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May 23, 1989
Issued Date -
N/A
app pub date -
May 23, 1988
filing date -
May 11, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a heavy wall monolithic iron pipe comprising nodular graphite in the outer portion of its wall and flake or quasi-flake graphite in the inner portion of its wall and a method for making said pipe. The central portion of the wall of the pipe may be a combination of nodular graphite and flake or quasi-flake graphite.
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