Heat Loss from Steam Pipeline. A steel pipeline, 2-in. schedule 40 pipe, contains saturated steam at 121.1°C. The line is insulated with 25.4 mm of asbestos. Assuming that the inside surface...

Extracted text: Heat Loss from Steam Pipeline. A steel pipeline, 2-in. schedule 40 pipe, contains saturated steam at 121.1°C. The line is insulated with 25.4 mm of asbestos. Assuming that the inside surface temperature of the metal wall is at 121.1°C and the outer surface of the insulation is at 26.7°C, calculate the heat loss for 30.5 m of pipe. Also, calculate the kg of steam condensed per hour in the pipe due to the heat loss. The average k for steel from Appendix A.3 is 45 W/m - K and by linear interpolation for an average temperature of (121.1 + 26.7)/2 or 73.9°C, the k for asbestos is 0.182. Ans. 5384 W, 8.81 kg steam/h