What material is used for the centrifugal pump for acetic acid medium?
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For a centrifugal pump, acetic acid is not used as the medium. Which material is better for the impeller, shaft, etc. Can I use 316L?
The material selection of the pump, the content of the medium (acetic acid), the temperature of the medium, whether it contains solid particles and other substances, etc., all need to be considered. The medium is acetic acid. If the temperature is not too high, it is ok to use 316L. However, the material strength of 316L is low. If the shaft uses 316L, you should pay attention to the requirement for a thicker shaft diameter (generally, the shaft is matched with 304).
316L? The material that does not corrode in acetic acid is zirconium
316L is a bit reluctant, it is best to use Hastelloy alloy.
304 is enough. Our company has always used 304.
As the acetic acid pressure and temperature increase, 316L, Hastelloy and zirconium materials can be used respectively.
Some time ago I visited a manufacturer that produces products for the acetic acid process using zirconium and Hastelloy.
If it is only used in acetic acid below 150 degrees, 316L is fine. However, if there are other media in acetic acid, such as HI, or the pump is a high-speed pump, hastelloy alloy is generally used.
My reply seems like an advertisement: )) When the temperature exceeds 120 degrees, it is best to use Hastelloy 276, and when the temperature exceeds 180 degrees, it is best to use zirconium. Titanium can also be used, but without iodine. Design patent issues and specific process flow issues. I know that Sichuan Riji Seal has a mechanical seal specifically for acetic acid.
Where is your pump used in the acetic acid process? The places used are different and the materials are also different.