Single deck floating roof tank 12 figure 1 7.
Single deck pontoon floating roof.
No hours are included for a dedicated fire.
The upper surface of the pontoon is slanted down toward the center for drainage purposes and the lower surface.
Good access exists to tank for equipment and materials.
Schematic sketch of the stabilised condensate tank 17.
The two preferred configurations for external floating roofs are the double deck and the low single deck with 30 minimum pontoon area.
Tank is clean gas and lead free and ready for hot work.
Over the years jm dixon associates has undertaken the design of many floating roofs both double and single deck for world renowned clients such as philips 66 exxon mobil and ineos.
Storage tank capacities and levels 15 figure 1 9.
Single deck type.
Fabricate install new single deck annular pontoon floating roof the screening estimates are based upon the following assumptions.
Single deck pontoon type floating roof 9 figure 1 5.
The deck of single deck floating roofs shall be designed to be in contact with the storage liquid during normal operation regardless of the service.
The annular pontoon is divided into several chambers by radial bulkheads.
Different roof configurations were shown in figure 100 1.
The sketches shown.
Doorsheet is a minimum of 8 high x 8 6 wide.
Having thus described my invention what i claim as new and desire to secure by letters patent of the united states is.
Double deck pontoon roofs which are designed with concentric annular pontoons with radial bulkheads in each pontoon section.
Double deck floating roof tank 13 figure 1 8.
Single deck roofs which have distributed buoyancy across the entire roof area through the provision of localized buoyancy chambers which are welded to the top side of the roof center deck.
Main two types of floating roof tanks single deck floating roof in single deck roof which is also called pontoon roof the buoyancy is derived by the pontoons according to api 650 3.
The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks.
Double deck type floating roof 10 figure 1 6.
A single deck type floating roof has an annular pontoon around the edge and a deck of single thickness in the center as seen in the diagram.
A floating roof for liquid storage tanks comprising a stiff annular peripheral pontoon a single deck portion constructed in the form of a flexible diaphragm attached to the said pontoon adjacent the upper edge thereof and.
