Calcium Silicate has replaced asbestos as the preferred insulation for steam lines in power plants. Consider a 40 cm O.D., 4 cm wall thickness steel steam line insulated with a 12 cm thickness of calcium silicate. The insulation is protected from damage by an aluminum sheet lagging that is 2.5 mm thick. The steam temperature is 565oC and ambient air temperature in the power plant is 26oC. The inside convective resistance is negligible, the outside convective heat transfer coefficient can be taken as 11 W/m^2 K, and the emittance of the aluminum is 0.1. Calculate the rate of heat loss per meter. Thermal conductivity of the pipe wall and Calsilite calcium silicate insulation blocks are 40 W/(m K) and 0.092 W/(m K) respectively.