What material should be used for pipes in the sulfuric acid production process that handle 98% concentrated sulfuric acid at 90 degrees Celsius?
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Our company intends to replace the heat exchangers in the dry absorption tower and the first and second absorption towers of its sulfuric acid plant with evaporative condensers, as an alternative to circulating water heat exchangers. I need help deciding on the material for the heat exchange pipes in evaporative cooling systems. The pipes in the original system are made of 316L steel with anodic protection; but is it suitable to use 316L for such systems as well? Are there any other issues that need to be considered? Thank you all for helping me~~~:P
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Fluorinated-lined pipes can resist corrosion from sulfuric acid of any concentration at 90 degrees Celsius.
It seems that carbon steel is better for using with concentrated sulfuric acid than stainless steel.
I need heat exchange tubes; those lined with fluorine won’t work
I checked, and carbon steel doesn’t work at high temperatures
High-silicon stainless steel resistant to strong acids – it’s just a bit more expensive
You need to tell us the operating temperature and concentration
Our company has used plate-type fluorinated lining heat exchangers; they have low efficiency, require a much larger area, and are very costly
It’s better to use one lined with fluoroplastic; 316L may also corrode