Method for making insulated pipe

Details Method for making insulated pipe Method for making insulated pipe

1975-09-12

1986-04-15

Moon, Charlie T.

Metal working

Method of mechanical manufacture

Assembling or joining

29157R, 29235, 53432, 53423, 53455, 138149, B23P 1102

Patent

active

045818045

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.

REFERENCES:
patent: 284050 (1883-08-01), Nichols
patent: 2570259 (1951-10-01), McKinley
patent: 2949953 (1960-08-01), Di Maio et al.
patent: 3012315 (1961-12-01), Stillwagon
patent: 3020192 (1962-02-01), Stephens et al.
patent: 3035331 (1962-05-01), Wieman
patent: 3137148 (1964-06-01), Kayser
patent: 3222777 (1965-12-01), Rutter et al.
patent: 3447230 (1969-06-01), Bargainnier et al.
patent: 3458966 (1969-08-01), Dunbar et al.
patent: 3921273 (1975-11-01), Kondo et al.

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