Depending on temperature, chemically, probably yes.
Given the greater density, the structure of the tank and its support require attention before any yes or no answer can be given.
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"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Depends in the time of residence , I mean how many hour and under what conditions the CAUSTIC SODA has been stored. If your plant is a big one, go and consult your safety engineer. You can consult also an ASME consultant.
If you have more questions, your safety engineer can ask somebody else like OSHA or a third party lab.
PROCESS:
You can performance some simulation on CHEMCAD (third party company) or in COMSOL software to simulate and predict some leaks or some mechanical failures in welding is so important to know the limits and charges (hydraulic charge), stresses and if the tank is always static or dynamic. If tank has LEGS you have to calculate some stress and limits on service time MAY BE you have to performance SOME UT or RT on T welding joints, valves , flanges and blind flanges and tubings.
ECONOMY AND COMMERCIAL:
If your plan is to put CAUSTIC SODA for a long time, you should study the option of build a new one, why? because of the ROI.
Carbon Steel Tanks and Caustic Soda
Re: Suitability of tank for 49% Caustic Soda
