We need to pump acetic acid into our process, but when I got the cost estimate for a mass flow meter, it was extremely high. It was so high because of the Hastelloy C needed for glacial acetic acid. So, what concentation can I feed without using an exotic stainless steel? 25% is not considered corrosive, but this dilute is inconvenient.
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What concentration of acetic acid?
- Thread starter Nitzey
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chemebabak
Chemical
Nitzey,
Do you need to use a mass flow meter? There are other types of flow meters that are not as expensive, such as orifice plates and electromagnetic flow meters. Are you using Hastelloy C for the pump and piping? If you are using 316SS then you could most likely use that for the meter. However, you should consult with a metallurgist. Consider posting a link to this thread in the Metallurgy area. ( )
Do you need to use a mass flow meter? There are other types of flow meters that are not as expensive, such as orifice plates and electromagnetic flow meters. Are you using Hastelloy C for the pump and piping? If you are using 316SS then you could most likely use that for the meter. However, you should consult with a metallurgist. Consider posting a link to this thread in the Metallurgy area. ( )
chemebabak
Chemical
By the way, Cole Palmer ( ) gives an "Excellent" rating for Glacial AA and 316SS:
The following is copied from
The following is copied from
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- #4
Thanks for the replies. A mass meter is preferred here since the flow is very low and we are feeding it into an emulsion. pH shock is to be avoided for emulsions and I want to keep the flow as steady and as accurate as possible. I have checked with well known suppliers of glacial acetic acid and they recommend 316L and even 304 stainless steel as compatible materials. However, I am not going to argue with the mass flow meter people(MicroMotion) as I trust them too.
I will try to post a link in the metallurgy section.
I will try to post a link in the metallurgy section.
moltenmetal
Chemical
Temperature is what matters. Look up the NACE reference. For cold glacial (but not SO cold that it actually freezes- be careful of that, hence the name), 316SS is OK. Warm it up a bit and you'll be in trouble quickly.
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