A pipeline is 750 m long and is made of steel with a 2-inch diameter schedule 40, and a k of 26 Btu/hr ft F. This pipe carries saturated steam at 300F. In turn, it has insulation of 1/2 inch of expanded perlite, with a k = 0.033 Btu/hr ft F. Heat is lost by radiation and convection to the environment (which is at a temperature of 70F and has a combined heat transfer coefficient of 10.3 Btu/hr F).

A) If the heat coefficient inside the pipe is 34.7 Btu/hr ftF, what will be the uninsulated heat loss [BTU/hr]?

B) If the heat coefficient inside the pipe is 34.7 Btu/hr ftF, what will be the heat loss with insulation [BTU/hr]?

I know that answer A is between 2,653,745 and 2,753,745 and answer B is between 295,000 and 315,000