Double Deck External Floating Roof Tank

If anyone has other thoughts on maximum fill rate i would apreciate the help.

Double deck external floating roof tank.

Larry post a reply. Schematic sketch of the stabilised condensate tank 17 figure 1 10. Double deck floating roof tank 13 figure 1 8. Storage tank capacities and levels 15 figure 1 9.

In my humble opinion the double deck arrangement would be a more robust design but may cost extra and a detailed techno economic evaluation would be needed to arrive at the optimum option. Impact test exemption curve 23. Sketches are provided in the article depicting the pan type pontoon and double deck arrangement for external floating roof tanks. Double deck type floating roof 10 figure 1 6.

Types of floating roofs in storage tanks. Floating roof tanks are commonly protected against lightning ignition by bonding the floating roof to the seal shoes at no less than 3m 10ft intervals use of insulating sections in the hanging linkages covering sharp points on hangers with insulating materials and installation of electrical bond straps across each pinned hanger joint. Single deck floating roof tank 12 figure 1 7. In the same sealing condition compared with external floating roof tank internal floating roof tank can further reduce the volatilization loss as a result of that compared with double deck floating roof on external floating roof tank shaded by fixed roof and the gas phase layer between fixed roof and internal floating plate have a more.

The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks. I reviewed api 650 and 2003 and didn t find much specific information pertaining to fill rates. I appreciate your advice on the rate of fill. External floating roof tank double deck type an external floating roof tank is a storage tank commonly used to store large quantities of petroleum products such as crude oil or condensate.

The tank is in crude oil service and is 5000 m3 capacity. These are categorized as external floating roofs which are designed to meet requirements of api standards 650 appendix c. The tank is external double deck floating roof. It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.