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.
Double deck external floating roof tank.
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.
The two preferred configurations for external floating roofs are the double deck and the low single deck with 30 minimum pontoon area.
Storage tank capacities and levels 15 figure 1 9.
These are categorized as external floating roofs which are designed to meet requirements of api standards 650 appendix c.
If anyone has other thoughts on maximum fill rate i would apreciate the help.
The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks.
Storagetech storage tank internal floating roofs storagetech has been proudly innovating designing manufactiring and installing external and internal pon.
It consists of an open topped cylindrical steel shell equipped with a roof that floats on the surface of the stored liquid.
I appreciate your advice on the rate of fill.
Double deck floating roof tank 13 figure 1 8.
Impact test exemption curve 23.
Schematic sketch of the stabilised condensate tank 17 figure 1 10.
The principal types of floating roof designs which are installed in tanks which store crude and middle distillate products are summarized below.
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 tank is external double deck floating roof.
The tank is in crude oil service and is 5000 m3 capacity.
Types of floating roofs in storage tanks.
I reviewed api 650 and 2003 and didn t find much specific information pertaining to fill rates.
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.
Sketches are provided in the article depicting the pan type pontoon and double deck arrangement for external floating roof tanks.
