hello. i have steam pipe lines in my apartment. i have insulated the MS pipes with glass wool. I am thinking that if i use any gas insulation (say Chlorine gas insulation) i will be able to save energy as gases have very low thermal conductivity. Is it safe to use chlorine insulation.? What will it averagely cost for insulating 1 meter of pipe.? What if there is a pitting in pipe and chlorine gas enters the steam flow? Is using gas insulation advisable.?