DOUBLE DECK FLOATING ROOF OF VERTICAL STEEL TANK FOR OIL AND PETROLEUM PRODUCTS Russian patent published in 2017 - IPC B65D88/34 B65D88/00 

FIELD: oil and gas industry.

SUBSTANCE: double deck floating roof of an oil tank includes concentrically arranged roof segments comprising interconnected compartments, where the compartments being arranged so that the smaller of the tangential surfaces of a compartment of the first segment fits with at least a portion of its surface to at least a portion of the surface of the greater tangential surface of a compartment of the second segment. The roof comprises a radial framework ring that is connected to one pair of compartments of adjacent roof segments fitting to each other with at least parts of their tangential surfaces, further joining them together; wherein the radial framework ring has such a length that it essentially joins the central part of the roof and the side plate. At least a portion of the at least one radial framework ring is in the form of a truss including vertical rods joined together, horizontal rods and cross rods. The roof also comprises of at least one annular framework ring that extends along the axial lines of the upper and lower portions of the compartments of the at least one annular segment. The annular framework ring has such a length that essentially connects all the compartments of one annular segment.

EFFECT: increase of strength, spatial rigidity and flotation ability of a double deck floating roof with a decrease in the material intensity of its production.

11 cl, 3 dwg