Abstract: An internal floating roof for use in large volatile or hazardous liquid storage tanks constructed of a plurality of open-top panel systems including C-shaped beams each having a vertical sidewall and flanges extending inward along the top and bottom of the beams with a bottom flange extending the vertical wall downward beyond the bottom. The panel systems are secured together using top and bottom brackets to construct a rigid, non-flexing roof structure to contain the hazardous gases and vapors beneath the floating roof without creating alternative escape pathways along the respective joints or seams between the panel systems. An additional seal in the form of a weld or resilient sealing member may be used along the joint between adjacent beams to further secure against leaking.

Abstract: An internal floating roof for use in large volatile or hazardous liquid storage tanks constructed of a plurality of open-top panel systems including C-shaped beams each having a vertical sidewall and flanges extending inward along the top and bottom of the beams with a bottom flange extending the vertical wall downward beyond the bottom. The panel systems are secured together using top and bottom brackets to construct a rigid, non-flexing roof structure to contain the hazardous gases and vapors beneath the floating roof without creating alternative escape pathways along the respective joints or seams between the panel systems. An additional seal in the form of a weld or resilient sealing member may be used along the joint between adjacent beams to further secure against leaking.

Abstract: A rim seal system between the outer periphery of an internal floating roof and the bulk liquid tank wall including a laterally deployed first resilient or flexible seal member and a second laterally deployed rigid seal member interposed between the distal end of the first seal member and the tank wall where the rigid seal member provides protection from abrasion of the resilient or flexible seal member by frictional contact with the tank wall. An outwardly expanding hanger assembly mounted above the seal system maintains the rigid seal member in contact with the tank wall.

Abstract: A rim seal system between the outer periphery of an internal floating roof and the bulk liquid tank wall including a laterally deployed first resilient or flexible seal member and a second laterally deployed rigid seal member interposed between the distal end of the first seal member and the tank wall where the rigid seal member provides protection from abrasion of the resilient or flexible seal member by frictional contact with the tank wall. An outwardly expanding hanger assembly mounted above the seal system maintains the rigid seal member in contact with the tank wall.

Abstract: An internal floating roof for use in large volatile or hazardous liquid storage tanks constructed of a plurality of open-top panel systems including C-shaped sidewalls having flanges extending inward along the top and bottom of the sidewall and another flange extending downward from the bottom. The panel systems are secured together using top and bottom bracket means to construct a rigid, non-flexing roof structure to contain the hazardous gases and vapors beneath the floating roof.

Abstract: A full contact floating roof for a storage vessel includes a plurality of panels wherein each panel includes a core disposed between upper and lower skins. A plurality of closures are provided wherein each closure is secured to perimeter edges of a panel by welding the closure to at least one of the upper and lower skins. A plurality of fasteners connect adjacent closures thereby forming the floating roof.