Why is SA789 used for the tubes in methanol reactors?
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Why is SA789, which corresponds to the national standard S31803 duplex stainless steel, used for the tubes in methanol reactors?
The operating environment of methanol reactors typically features high temperatures, high pressures, and corrosive media; therefore, the piping materials are required to have high corrosion resistance and heat resistance. SA789/S31803 is a duplex stainless steel that exhibits excellent corrosion resistance and durability, while also maintaining good strength and toughness under high temperatures and pressures. Therefore, using SA789/S31803 as the tubing for methanol reactors can effectively improve the reactor’s service life and stability, while reducing the costs associated with equipment maintenance and replacement. .
As specified, the pipes are made of duplex steel SAF 2205 and UNS31803, which corresponds to ASTM standard 789, while the shells are made of chromium-molybdenum steel. In accordance with the domestic NBT12001 requirements.
I’m very interested in this operating condition; could you talk about it in more detail?