There are thousands of boilers in commerical use ranging from 30 psig up to 1200 psig, from saturated steam to superheated.
I have seen, and heard, that the majority of commercial boilers are between 100-300 psig, saturated, which would put the temperature (using the steam tables) in the range of 337 degF to 421 degF.
But it really does depend on the application
Cooking food would be around 75 psig (320 degF)
Cleaning clothes could be as high as 125 psig (352 degF)
Running a turbine (900 degF at 900 psig)
Paper mills, power plants, saw mills, buildings, etc all can use a wide range even at the same facility.
Dirk |