Pipe heat dissipation
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I know there is a pipe coming out of a high-temperature oven; the medium flowing through it is hot air at a temperature of 150 degrees Celsius. The outer diameter of the pipe is 426 mm, the wall thickness is 6 mm, and the material used is 304L. The distance between the source and the end of the pipe is about 50 meters, with an ambient temperature of 30 degrees Celsius inside a building. I want to calculate how low the temperature will be after those 50 meters. Since the pipe isn’t insulated, should I first find the heat transfer coefficient of the inner wall of the pipe, and then use that along with other values to determine the overall heat transfer coefficient? Where can I find information on the heat transfer coefficients for the inner and outer walls?
There are two forms of heat transfer here: heat conduction and heat convection. Manual calculation is rather complex; simulation can be used instead, but the convective heat transfer coefficient needs to be calculated manually
That is, how should this overall heat transfer coefficient be determined? How much is appropriate?