A 15 cm outer diameter steam pipe is covered with 5 cm high-temperature insulation (k = 0.85 W/m°C) and 4 cm of low-temperature insulation (k = 0.72 W/m°C). The steam is at 500°C and the ambient air is at 40°C. Neglecting the thermal resistance of the steam and air sides and the metal wall, calculate:
1. The heat loss from a 1.0 m length of the pipe.
2. The temperature drops across the insulation.