District-heating line

Details District-heating line District-heating line

F - Mech Eng,Light,Heat,Weapons

17

D

189/15

F17D 5/06 (2006.01) F16L 59/14 (2006.01) G01M 3/04 (2006.01) G01M 3/18 (2006.01)

Patent

CA 1143671

Abstract of the Disclosure A district heating line comprising an inner metal tube intended for the transfer of a heating medium and encircled by an insulating layer of foamed plastic. Arranged around the insulating layer is a moisture impenetrable protective tube. To enable an alarm to be given in the event of a fault in the line, elongated blocks are fixedly mounted on the outer cylin- drical surface of the metal tube. The blocks are made of electrically insulating material. They each have at least one radially extending, outwardly opening channel on the outer surface thereof with the channels on adjacent blocks aligned with one another. The channels are dimensioned to accomodate the electrical connector and position it at a fixed distance from the outer cylindrical surface of the inner metal tube. The conductor is secured in the aligned channels at the fixed distance from the outer cylindrical surface of the inner metal tube. A water soluble salt is incorporated in the electrically insulating blocks.

347723

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