| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a flexible conduit to be manufactured at a low cost and have a high heat insulation value. SOLUTION: The flexible conduit comprises a corrugated inside metallic pipe 1; a corrugated outside metallic pipe 2 situated on the inside metallic pipe with a distance therebetween, and a spacer part mounted on the inside metallic pipe 1. The spacer part consists of two strands made of fiber-reinforced plastic having winding directions opposite to each other, a heat insulation material, and a pressure lower than an atmosphere pressure in an annular gap between the pipes 1 and 2. Second space parts 8 and 9 formed at least in one lot and of two strands mounted in winding directions opposite to each other are arranged on first spacer parts 4 and 5 consisting of two strands mounted in winding directions opposite to each other.</p> |
