Steam at T1 = 320C flows in a cast iron pipe (k=80W/mK) whose inner and outer diameters are D=5cm and D2=5.5cm, respectively. The pipe is covered with 3cm thick glass wool insulation with k=0.05W/mK. Heat is lost to the surroundings at T2 = 5C by natural convection and radiation, with a combined heat transfer coefficient of h-18W/mK. Taking the heat transfer coefficient inside the pipe to be h=60W/mK, determine the rate of heat loss from the steam per unit length of the pipe. Copyright McGraw-Hill Education. All rights reserved. No reproduction or distribution without the prior written consent of McGraw-Hill Education. Insulation Steam Tool h T3 12 h To02 13 T3 Tool wwwwwwwwwwwwwww.To2 T T R R R Ro