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Why are only the tubes in the tubular methanol reactor made of duplex steel?

2017-10-17View Original

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RT, in a tubular methanol reactor, why is only the tubes made of duplex steel, with a duplex steel layer welded on the surface of the tube sheet, while the end caps on the tube side and other components are made of materials such as chromium-molybdenum steel? Anyone who knows the answer, please let me know. Thank you
Reply #22017-10-21
Duplex steel is corrosion-resistant, highly ductile, and has high heat transfer efficiency, while molybdenum alloy steel can withstand high temperatures and pressures.
Reply #32017-10-22
This post was last edited by Small and on 2017-10-22 at 19:02. The conditions in the tube section are different from those in the header; there is catalyst in the tube section, while boiler water is present inside the tubes
Reply #42017-10-26
The tube bundle is severely deformed; since nothing good can be used, I might as well go home for the New Year right away

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