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Formic Acid and Sodium Hydroxide storage tanks




I am looking at utilising some existing 8000gall. bulk tanks for the storage of 88% Formic Acid and 50% Sodium Hydroxide. Would Stainless Steel be suitable for both, or would it be preferred to use a lined tank for the caustic (Maybe even a Glass lined tank)?

Mark Macdonald
User - Warwick, RI, USA
2007



2007

Stainless is fine for caustic. In fact, either mild steel or polyethylene is fine for caustic. Using SS is kind of overkill.

The last thing you want to line a caustic storage tank with is glass. Caustic attacks it.

dave wichern
Dave Wichern
Consultant - The Bronx, New York



Regarding your formic acid, stainless is also OK, provided it is of the 300 series (preferably 316) and the acid is free of chlorides or other halides.
G. Marrufo-Mexico

Guillermo Marrufo
- Monterrey, Mexico
2007


How do you clean the inside of a sodium hydroxide tank. The formations are a white clumpy crystalline formation and the tank is steel. Is there an easier way without putting men inside on ladders with industrial scrapers?

David Bradford Russell
- Raleigh, North Carolina
2007



No good suggestion for you; hope someone else has one. But if people do go into the tank, remember that it's a confined space and safety harnesses may be required, and fresh air.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2007




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