Calculate the overall heat transfer coefficient of steel pipes based on the inner surface. The diameter in the pipe is 12.7 cm, and a thickness of 2.4 cm. The coefficient of moving heat convection in the pipe is 375 w / (m² ° C), convective heat transfer coefficient outside the pipe is 30 w / (m² ° C), the steel pipe thermal conductivity is 15 w / (m ° C). If the pipe is used to drain steam at a temperature of 120 ° C and the temperature of the environment is 25 ° C, determine the heat transfer rate from the pipe per meter. Q = Answer Watt / M

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