Water vapor contains small amounts of hydrogen sulfide and ammonia; what material should be used for the textbook?
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This post was last edited by lime1907 on 2016-11-21 at 12:24. Hello everyone! Question: I need to design a shell-and-tube heat exchanger for the condensation of steam at 121°C. The steam contains trace amounts of H2S and NH3 gases, with the steam making up 99.9999% of the mixture. What materials would be suitable for the heat exchange tubes and the shell?
Heat exchange tube 10# will do. Water chamber carbon steel. Does 99.9999% water vapor still contain trace amounts of H2S and NH3? That’s no different from having none.
With 1PPm hydrogen sulfide, there’s no need to consider any corrosion issues; ordinary carbon steel heat exchange tubes will suffice. If the shell side is filled with water, carbon steel is still appropriate
CS steel plate, NACE, corrosion allowance of 3mm