Method of forming an insulating pipe

Details Method of forming an insulating pipe Method of forming an insulating pipe

1981-04-03

1983-05-24

Anderson, Philip E.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

29460, 156294, 156330, 264 455, 264 465, 264 469, 264DIG13, B29D 2704

Patent

active

043849059

ABSTRACT:
The thermally insulated conduit includes an internal pipe, an external pipe, and an insulating foam which fills the interspace formed between these pipes. An electric grid, consisting of a wire heater, extends through the tubular space and is attached to the outer periphery of the internal pipe. The insulating foam used is made from a base of epoxy resins which are polymerized and hardened by an exothermic chemical reaction. The electric grid is used to heat the fluid contained in the internal pipe when the conduit is operated.

REFERENCES:
patent: 2857931 (1958-10-01), Lawton
patent: 3289704 (1966-12-01), Nicosia
patent: 3380258 (1968-04-01), Young
patent: 3480493 (1969-11-01), Bauer et al.
patent: 3491171 (1970-01-01), French
patent: 3685546 (1972-08-01), Sigmund
patent: 3935632 (1976-02-01), Maxson
patent: 3949461 (1976-04-01), Thastrup
patent: 4009732 (1977-03-01), Martin et al.
patent: 4049480 (1977-09-01), Kutschke
patent: 4073841 (1978-02-01), Dultgen et al.

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