Prefabricated thermally insulated pipeline section and...

Details Prefabricated thermally insulated pipeline section and... Prefabricated thermally insulated pipeline section and...

F - Mech Eng,Light,Heat,Weapons

16

L

26/155, 189/26

F16L 3/22 (2006.01) B28B 19/00 (2006.01) F16L 9/18 (2006.01) F16L 59/14 (2006.01)

Patent

CA 1200216

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 After curing, the pipe is withdrawn to expose the inner surface of the liner to permit rapid drying at elevated temperature.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.

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