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 aluminium sheet lagging that is 2.5 mm thick. The steam temperature is 565 C and ambient air temperature in the power plant is 26 C. The inside convective resistance is negligible, the outside convective heat transfer coefficient can be taken as 11 W/m2K, and the remittance of the aluminium 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.