Q1: A 0.20-m diameter, thin-walled steel pipe is used to transport saturated steam at a temperature of 486K in a room for which the air temperature is 25°C and convection heat transfer coefficient at the outer surface of the pipe is 20 W/m.ok. Assume an emissivity of 0.8 for both steel and insulation surface, and the steam-side convection can be neglected, i.e. the inner and outer surfaces of the steel pipe are at the same temperature as saturated steam. Also, surrounding temperature may be assumed the same as air temperature. a) What is the heat loss per unit length from the pipe in W/m.