Insulated plastic pipe product and method
AssigneeAmeron, Inc.
InventorHugh T. McLaughlin
Life of this patent
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Abstract
An insulated pipe for conducting high and low temperature fluids includes a rigid carrier pipe, a layer of volumetrically compressible insulating material around the O.D. of the carrier pipe, and a protective outer pipe around the insulating layer. The method of making the pipe product includes placing a closed flexible bag around the carrier pipe and the insulating layer, and then drawing a vacuum on the interior of the bag to compress the insulating layer. The outer pipe is slid lengthwise over the compressed insulating layer, and the vacuum is then removed to allow the insulation to partially expand and fill the annulus between the carrier pipe and the outer pipe.
Claims7
An insulated pipe construction comprising a rigid carrier pipe, a rigid tubular outer shell disposed concentrically around and spaced from the carrier pipe, a partially compressed, volumetrically deformable insulation layer in the space between the carrier pipe and the outer shell, and a flexible, imperforate tube normally having an inside diameter greater than that of the outer shell encasing the insulation layer and embedded between the outer shell and the partially compressed insulation layer.
Dependencies are inferred from the claim text.