Prefabricated thermally insulated pipeline section

Details Prefabricated thermally insulated pipeline section Prefabricated thermally insulated pipeline section

1984-12-13

1987-02-03

Marcus, Stephen

Pipes and tubular conduits

Combined

With end structure

138149, F16L 922

Patent

active

046403124

ABSTRACT:
Prefabricated insulated pipeline section having a one-piece cast cured and dried insulative liner formed of lightweight aggregate in a foamed portland cement paste binder bonded to the inner surface of a tubular outer casing. The liner composition may be cast, in place between the liner and the pipe, and wet cured at elevated temperature. Bonding between the pipe and the liner composition is avoided by employing a cement cure retarder on the outer surface of the pipe or by mechanically debonding the pipe from the liner during curing. After curing, the pipe is withdrawn to expose the inner surface of the liner to permit rapid drying at elevated temperature. The prefabricated insulated sections permit simplified pipeline construction at reduced cost as compared with traditional methods of applying half shells of insulation to the pipeline on site.

REFERENCES:
patent: 1525087 (1925-02-01), Murray
patent: 2664112 (1953-12-01), Isenberg
patent: 2707493 (1955-05-01), Bonvillian et al.
patent: 3933182 (1976-01-01), Costes
patent: 4014369 (1977-03-01), Kobres, Jr.
"Shaw Develops a New Thermal Coating for Pipe", Canadian Petroleum, Oct. 1981, Alister Thomas.

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