A lot has been written about the hazardous nature of asbestos fiber and its use. In fact in most of the western countries asbestos is a Tabu word.  

The facts speaks quiet contrary.  

            "EPA does not believe that installed A.C. pressure pipes should be  replaced or its used should be discontinued." (US federal register July 22nd. 1989 page  29497). 

           Asbestos Removal is Unwarranted: