Used 30,000 Gal William Grant Carbon Steel Tank. Rated 2.5 psig @ 400 F. Design specific gravity of .774. Flat bottom and cone top. Supported by bottom head. Single row of internal bottom heating coils. 12'0" ID x 36'0" T/T. Estimated weight 19,571 lbs. API-650 coded. Last used to store wax. S/N # 1641. Built 2015.