| 摘要 |
The present invention relates to a device for the heat insulation of at least one underwater pipe ( 1 ) intended to be laid on the sea bed at great depth, comprising an insulating coating surrounding the latter and a protective envelope ( 3 ), characterized in that said insulating coating comprises a virtually incompressible liquid/solid phase change material ( 4 ) with a melting temperature T<SUB>0 </SUB>higher than that T<SUB>2 </SUB>of the medium surrounding the pipe in operation and less than that T<SUB>1 </SUB>of the effluents circulating in the pipe, and said material ( 4 ) preferably being impregnated in an absorbent matrix ( 2 ) surrounding the pipe ( 1 ), preferably nearest its outer surface, which protective envelope ( 3 ) is resistant and deformable and ensures a containment against and about said insulating coating.
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