Overflow drainage system for floating roof storage tank
AssigneeSaudi Arabian Oil Company
InventorMohammed A. Ben Afeef
Life of this patent
Estimating the term…
Abstract
A drain cover assembly for sealing a drain pipe that extends vertically from the top surface of the deck of a floating roof on a liquid storage tank includes a circular cover and at least two buoyant members, or pontoons, secured to the underside of the cover for imparting a buoyant force to raise the cover upon the accumulation of excess water on the deck. The pontoons are spaced apart from each other to allow water to pass between them and into the drainpipe.
Claims16
An automatic drain assembly for a floating roof covering a liquid product stored in tank, the roof including a deck and a drain pipe extending vertically from the top surface of the deck and providing a conduit for water to be drained from the deck, the drain assembly comprising:
- a drain pipe sealing cover, at least two buoyant members secured in spaced apart relation to the underside of the cover for imparting a buoyant force to lift the cover to thereby allow water to flow into the drain pipe.
A drain cover assembly for a drain pipe that extends vertically from a floating roof of a liquid storage tank in order to permit the removal of excess water from the roof, the cover assembly comprising:
- a cover plate having a circular rim adapted to cover the top of the drain pipe;
- and
- at least two pontoons secured to the underside of the rim for imparting a buoyant force to the cover plate, the pontoons being spaced apart to allow water to flow through to the drain pipe.
Dependencies are inferred from the claim text.