A stainless-steel pipe (thermal conductivity 17 W/[m °C]) is being used to
convey heated oil ( Fig. E4.9 ). The inside surface temperature is 130°C. The
pipe is 2 cm thick with an inside diameter of 8 cm.The pipe is insulated with
0.04 m thick insulation (thermal conductivity 0.035 W/[m °C]). The outer
insulation temperature is 25°C. Calculate the temperature of the interface
between steel and insulation, assume steady-state conditions.