What materials are commonly used for heat exchange tubes? Austenitic stainless steel? Ferritic stainless steel?
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Ferritic stainless steels have a low coefficient of thermal expansion (they expand less when heated compared to austenitic stainless steels)
This mainly depends on whether the medium and material meet the applicable conditions.
This post was last edited by Zhongyuanren on 2016-4-7 07:17. The common material for heat exchange tubes is carbon steel; when dealing with media that have moderate corrosivity, duplex steel is used; titanium tubes are employed for heat exchange with seawater.
All our company’s products are made of 304 stainless steel, but theoretically, ferritic stainless steel seems to be better
Heat exchange tubes generally have high flow velocities and thin walls; stainless steel is more suitable for such applications
I mean that when choosing between austenitic stainless steel and ferritic stainless steel, a detailed analysis is also necessary.
What is the specific analysis method? Can you give an example?
Your material choices are too extreme; given the moderate corrosivity of the medium, using duplex steel would result in high costs. Carbon steel is the commonly used material for heat exchange tubes, as it is less susceptible to corrosion