Hi there, It is getting cold out and I have a problem. Dining room under construction, so I have an old radiator removed. So I figured get a new valve right? Well the new 1 1/4″ valve fits nicely onto the steam in pipe, but does not fit onto the radiator flange. The problem is I cannot get the rdiator flange off the old radiator. It must weigh 300 lbs and cost hundreds for a new one.Any ideas how I can take this thing off? I put an ice cube into the pipe and torched the outside of the nut that is close to the radiator, the put a 6′ pipe on my wrench for leverage, and boards on the radiator for leverage, still it won’t budge. Puzzled.