Patent ID: 7607457

Claim:
An insulation system ( 1 ) for pipes, containers, ventilation ducts and like installation parts which have an outer surface temperature which periodically is below the dew point of the ambient air, said insulation system comprising a thermally insulating layer and ( 5 ), a layer of a vapour barrier ( 2 ) arranged on one side of the thermally insulating layer, and a layer of hygroscopic material ( 3 ), said layers being circumferentially arranged in such a manner that the insulation system ( 1 ), starting from the outside, comprises said vapour barrier ( 2 ), said layer of hygroscopic material ( 3 ), and said thermally insulating layer ( 5 ), the layer of hygroscopic material ( 3 ) being arranged between the layer of the vapour barrier ( 2 ) and the thermally insulating layer ( 5 ), said hygroscopic material ( 3 ) being at least partially connected with the vapour barrier ( 2 ), and the combination of the vapour barrier ( 2 ) and the hygroscopic material ( 3 ) being connected with the thermally insulating layer ( 5 ) in such a manner that the hygroscopic material ( 3 ) partially makes contact with the thermally insulating layer ( 5 ), and with said layer of hygroscopic material ( 3 ) being arranged so as not to make contact with the outer surface of the installation part that receives said insulation system.