MOISTURE-PROOF EXTERNAL SHELL FOR LONG-MEASURING LENGTHY OBJECTS, MOSTLY CABLES AND PIPES (VERSIONS) Russian patent published in 2012 - IPC F16L58/10 

FIELD: construction.

SUBSTANCE: moisture-proof external shell for long-measuring lengthy objects, preferably cables and pipes, consisting of a polymer material, differing by the fact that the specified shell is made by extrusion in the form of the main polymer layer with additives providing for specific surface electric resistance in the range from 10⁶ to 10⁹ Ohm, jointly with a conducting structure of cellular shape adjacent to the surface in contact with it and electrically continuous along the entire length with an area of an elementary cell limited with conducting elements of not more than 4 cm² or a linear shape with the minimum distance between any two adjacent conducting linear elements of not more than 2 cm.

EFFECT: prevention of electrostatic charges accumulation in conditions, when discharges of electrostatic charges carry risks for electronic equipment or may serve as a reason for explosion of explosive gaseous products when installing objects in explosive areas.

21 cl, 2 dwg, 2 tbl