Do you know what will be the range of normal operation of Waste Heat Boiler?? does anyone have the doent?

There are all kinds of waste heat boilers. Are you asking about the range of the input waste heat or the steam output. Many on the exhaust of gas turbines or IC engines can produce steam in the 500 to 650 degree range and just about any pressure with in reason to match those temperatures. If the waste heat is from some process then the range can be all over the place.