Hi everyone,
I am in the process of purchasing brewery equipment, and am receiving some contradictory information between suppliers regarding the desired surface finish on the interior of vessels.
I am particularly interested in what your thoughts are regarding fermenter vessels, because here a smoother internal finish would aid most with CIP.
This is my current situation: One of our suppliers differentiates themselves by claiming all their equipment has internal mirror finish polishing. Other suppliers offer standard 2B finish with pickling and passivation, and when I asked whether they also do mirror finish 8K I received the following advice:
I went back to the mirror-finish supplier, and shared the above with him, and this was his response:
So now I am confused: is mirror finish the way to go, or is it rather not advised? I’ve read it will help with cleaning, but the words of the first supplier above made me a little concerned. Does it really prevent a good passivation layer?
I am in the process of purchasing brewery equipment, and am receiving some contradictory information between suppliers regarding the desired surface finish on the interior of vessels.
I am particularly interested in what your thoughts are regarding fermenter vessels, because here a smoother internal finish would aid most with CIP.
This is my current situation: One of our suppliers differentiates themselves by claiming all their equipment has internal mirror finish polishing. Other suppliers offer standard 2B finish with pickling and passivation, and when I asked whether they also do mirror finish 8K I received the following advice:
“We advise to keep the acid water and passivation as it will do on 2B original plate and will also form a protective layer on the plate. The mirror type is very shiny and it is not good for the welders, and also could not do acid wash and passivation. But we can offer for free if you like.”
“Most other suppliers want to save costs, so they do passivation inside the tanks directly, and save polishing cost. And most other suppliers don't have the ability to do mirror polish inside. After passivation, the bad surface/welding pores and cracks will be covered but they are still there, you just cannot see them.
After you receive the mirror polish tanks ,you have to do passivation simply again before you start to use them. Mirror Polish doesn't matter with the welding quality and does not affect the welding quality. On the contrary, it will test the welding quality. If the welding quality is not good, the welding pores and cracks will appear after polish.”
After you receive the mirror polish tanks ,you have to do passivation simply again before you start to use them. Mirror Polish doesn't matter with the welding quality and does not affect the welding quality. On the contrary, it will test the welding quality. If the welding quality is not good, the welding pores and cracks will appear after polish.”
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