The annular pontoon is divided into several chambers by radial bulkheads.
Single deck pontoon type floating roof.
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.
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.
Single deck floating roof tank 12 figure 1 7.
Single deck pontoon type floating roof 9 figure 1 5.
Double deck floating roof tank 13 figure 1 8.
No hours are included for a dedicated fire.
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.
Types of fixed roof tanks 8 figure 1 4.
In single deck roof which shown above is also called pontoon roof the buoyancy is derived in the pontoon an annular circular pontoon radially divided into liquid tight compartments.
Good access exists to tank for equipment and materials.
Doorsheet is a minimum of 8 high x 8 6 wide.
Fabricate install new single deck annular pontoon floating roof the screening estimates are based upon the following assumptions.
The two preferred configurations for external floating roofs are the double deck and the low single deck with 30 minimum pontoon area.
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 sloped downwardly towards the center of the roof and radially arranged tension members each haviqg one end attached to said single deck portion at a.
The low single deck is the more efficient of the two for 30 to 170 foot diameter tanks.
The allentech hybrid stainless steel aluminum internal floating roof was developed for products which may be corrosive to aluminum in the liquid phase.
This hybrid skin pontoon type ifr is the same basic design as our aluminum skin pontoon ifr except that all submerged or partially submerged components are constructed of stainless steel.
Double deck type floating roof 10 figure 1 6.
Different roof configurations were shown in figure 100 1.
