Conduit for conveying a fluid, the temperature of which is different from the surrounding temperature

Conduit for conveyance of a fluid, in particular a fluid whose temperature is substantially different from the surrounding or ambient temperature, including a circulation pipe for the said fluid, sheath means of insulating material surrounding and engaging said pipe and an outer rigid covering surrounding and protecting said sheath means, characterized in that the said sheath means of insulating material is interrupted at substantially regular intervals and said sheath means forming at each interval at least one fluid-tight lap joint having a coaxial structure and a variable lap surface, that the said circulation pipe is interrupted and terminates at the region of each interval in two spaced ends defining between themselves a gap in said circulation pipe, and that said pipe communicates, through the medium of said gap, with a fluid-tight, substantially annular cylindrical space outside the said pipe, a stationary coaxial sleeve surrounding and spaced from said pipe and surrounded by said lap joint of said sheath means, said sleeve extending across and beyond said gap over a certain length and two corrugated waved compensators, a pair of connecting members respectively fixedly connecting said compensators to said pipe at the region of said two ends thereof, fixing means fixing said compensators at portions thereof respectively distant from said pipe ends to said stationary sleeve, said sleeve and compensators defining between themselves said substantially annular cylindrical space with which said pipe communicates through said gap thereof, and attaching means attaching said sleeve to said outer rigid covering for maintaining said sleeve stationary.