Oil Storage Tank Conversion

Typically, an oil storage tank consists of an open-topped cylindrical steel shell equipped with a roof floating on the surface of the stored oil, rising and falling with the level of the oil stored.

The floating comprises deck fittings and rim seal system.The floating roof decks are constructed of welded steel plates that are of three types – pan, pontoon, and double deck. Although numerous pan-type decks are currently in use, the present trend involves using pontoon and double-deck type floating roofs.

Optimum supply various versions of floating decks that are tailored to emphasize particular features, including but not limited to, oil contact, load-carrying capacity, roof stability, or pontoon arrangement.

The oil surface is covered by the floating deck, except in the small annular space between the deck and the shell. The deck may contact the oil or float directly above the pontoons.

Oil storage tanks are also equipped with a rim seal system attached to the roof perimeter. The rim seal system slides against the tank wall on lowering and raising the roof. The floating deck is also equipped with fittings that penetrate the deck and perform the requisite functions.

The external floating roof design is such that it reduces evaporative losses from the rim seal system, deck fittings, and any exposed liquid on the tank walls.