Hi,
I am reviewing the vendor proposal for a non-metallic chemical storage tank for storing diluted KOH. The vendor has provided only 200 mm top freeboard above the working liquid level. It seems low to me. The tank has nitrogen blanketing to prevent any oxygen/CO2 ingress. Is there a minimum head space requirement for proper N2 padding?
The slosh wave height due to seismic factors is not significant. So that's not a factor in determining the freeboard height.
Thanks