Centrifuge Material

[pvcguy]

We are required to purchase a replacement PVC slurry centrifuge for our process due to deterioration and cracking found in our present 304 SS equipment. Our supplier is recommending that the new equipment be of 2205 or Inconel material. Has anyone had extended life using any of these materials in this service opposed to 316L. We have switched a lot of material to 316L from 304 over the past 20 years but do have centrifuges of 316L material operating for awhile with good success. Any experience with this would be appreciated.

 

[unclesyd]

I wouldn't trust 316 S/S not to crack in your service. As stated on or the other materials would work but I haven't run across any centrifuges fabricated from either materials. You will find Hastalloy C, at a price, of the shelf. With the current price of Nickel as it is anything is that you could use is going to be extremely high.
We use both 304L and Titanium on our centrifuges due to corrosion by HNO3. Titanium has gotten fairly reasonable compared to several years ago. You might look at it.

What type of centrifuge are you looking for?

 

[LanaCarrie]

Alfa Laval does make disc stack centrifuges from 2205. We use their centrifuges (different application - sand/water/oil slurry) and have not had cracking problems in the past. Ours are older models however and are made from 329 Duplex - 2205 is an improvement on that (especially if you do any weld repairs or build-up of erroded areas)