Dual graphite structured pipe

Details Dual graphite structured pipe Dual graphite structured pipe

1988-05-23

1989-05-23

Yee, Deborah

Pipes and tubular conduits

Distinct layers

138177, 138143, 428682, 148909, 148910, 148321, 148323, F16L 914

Patent

active

048320846

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.

REFERENCES:
patent: 1614863 (1927-01-01), Beatty
patent: 1678931 (1928-07-01), Blumberg et al.
patent: 1954892 (1933-01-01), Russell et al.
patent: 3349831 (1967-10-01), Moore et al.
patent: 3415307 (1968-12-01), Schuh et al.
patent: 3703922 (1972-11-01), Dunks et al.
patent: 4058153 (1977-11-01), Pierrel
patent: 4412578 (1983-11-01), Doliwa et al.
patent: 4579164 (1986-04-01), Hartley et al.

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