Consider a horizontally oriented steel pipe (2-nom sch 40 pipe with k = 25 btu/hr) that is lagged with fiberglass insulation (k = 0.02 btu/hr. ft ◦r) that is 1.0 inch thick. the pipe conveys the steam that maintains inside surface temperature at 250 ◦ f. air outside the insulation is at 80 ◦ f. determine the heat loss through the pipe and the insulation. use churchill- chu equation to calculate nu number