| 摘要 |
The pipeline for the conveying of hot or cold fluids comprises metallic and rigid tubes (2) which are assembled directly end to end, a covering (5) of heat-insulating material in the form of sleeves (6) which are made on the basis of a cement filled with thermically insulating inorganic particles, with said covering (5) being disposed inside said tubes (2) and being in direct contact with the fluid conveyed by the pipeline. The thickness of the covering (5) made of heat-insulating material is determined in such a way that the expansion or contraction of the tubes (2) upon the feeding of hot or cold fluid into the pipeline remains compatible with the mechanical resistance of the tubes and that the outer diameter of the sleeves (6) is slightly smaller than the interior diameter of the tubes (2), with the annular space between said tubes (2) and said sleeves (6) being filled by a sealing material (8) which is injected under pressure and is more elastic than the material of the sleeves. Application especially for conveying hot water, crude oil and cooled or liquefied gas at low temperatures. |
