Summary for nitric acid storage tank Discussion
nitric acid storage tank material is the key issue in this thread, but the answers stress that the right choice depends on concentration, temperature, and how long the acid will sit before use. Sunil Trivedi asked what material of construction is suitable for bulk acid storage for CIP use in milk products and whether SS316 is advisable. Jose Morales said more information is needed before giving a firm answer, and he would not recommend stainless steel because localized corrosion can occur at small imperfections where acid contacts the tank; he said he would be more comfortable with a polymer-based storage tank and noted that he uses those successfully. Padmanava Jethy added that in jewellery work, nitric acid is stored in glass bottles for gold refining, though he was referring to relatively low-strength lab acid. The thread does not give a definitive yes for SS316.
Q. we need to do CIP for milk products and want to use acid for rinsing.
to store the bulk acid we need to clarify the moc of storage tank
Sunil Trivedi
– Ahmedabad, Gujarat, India
December 28, 2011
January 23, 2012
Sunil,
We need a lot more information to answer this question. For example, at what temperature will you store it? at what concentration? how long do you plan on storing it before you use it and make a new batch?
I wouldn’t recommend it, just because there is a risk of localized corrosion if there are small imperfections in the tank interface with the acid. I would be more comfortable with a polymer based storage tank. I use those myself and they’ve worked great for me. Good luck.
Jose Morales
– Berkeley, California, USA
I belong to jewellery industry. We use nitric and store in glass bottles. It is used for gold refining. You can contact a refiner and see how it is stored. I am talking about not much powerful concentration used in labs.
Padmanava Jethy
– Cuttack Odisha, India
March 23, 2012