Differentiate Between Water Tube and Fire Tube Boilers?

Fire Tube Boiler 

Hot flue gases flow inside the tube and water outside the tube. This boiler are generally internally fired. This boiler pressure limited to 20 bar. Fire tube boiler is low rate of steam production . 

Fire tube boiler not suitable for large power plant. Fire tube boiler is high pressure and less risk. Fire tube boiler difficult to construct 

Water Tube Boiler

Water tube boiler is water flow inside the turbine and hot flue gases outside the tube. Water tube boiler are generally externally fired. These boiler pressure limited to 100 bar. Water tube boiler is higher rate of steam production 

Water tube boiler is suitable for large power plant. Water tube boiler is high boiler pressure and high risk. Water tube boiler simple in construction