Method of producing insulated pipeline components

Details Method of producing insulated pipeline components Method of producing insulated pipeline components

B - Operations, Transporting

29

C

18/642, 154/53.0

B29C 63/18 (2006.01) B29C 63/20 (2006.01) F16L 59/04 (2006.01) F16L 59/22 (2006.01)

Patent

CA 1192716

CANADIAN PATENT APPLICATION OF OLLE KRISTENSSON AND BO ROLF GUNNAR NYSTR?M FOR A METHOD OF PRODUCING INSULATED PIPELINE COMPONENTS Abstract of the Disclosure Insulated pipeline components are produced by posi- tioning a steel pipe in the cavity of a casting mold with the pipe ends protruding therefrom. The dimensions of the cavity are greater than those of the inner pipe, and in the space between the inner pipe and the contact surfaces of the mold cavity a plastic powder is positioned which is molten by heating of the mold. The mold is then rotated in a manner well known in rotational molding technique, and after the mold has cooled the component is removed and expandable plastic material is supplied to the space between the inner pipe and the jacket and is foamed in known manner. A component produced by the method according to the invention has an exactly centered inner pipe, lacks conventional joints and can be produced at rela- tively low cost in a manner complying with industrial safety requirements.

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