Patent ID: 6938654

Claim:
A system for the transportation and storage of a product, which system comprises: (a) a tank including cylindrical wall section and two ends, wherein the cylindrical wall section and two ends define a cylindrical tank periphery, and wherein the tank periphery has an interior and an exterior; (b) a valve box including one or more side walls, a bottom wall, and a removable, sealable top cover which can be attached to the one or more side walls to seal the valve box, wherein the valve box side walls are sealably joined to the cylindrical wall; (c) one or more process valves disposed in the valve box, wherein each valve has a first and a second end, wherein each first end is connected to a pipe which passes through a wall of the valve box for introducing product into the tank or withdrawing product from the tank; and (d) a purge valve and pressure measurement means in fluid communication with the valve box; wherein the product in the tank is isolated from the atmosphere surrounding the tank when the valve box is sealed.