Floating roof seal

A method of forming a seal for use on a floating roof of a floating roof storage tank to close a space defined between such floating roof and a tank wall, comprising:

• providing a single ply unitary length of pliable material, said pliable material having end edges on opposite ends of the material, side edges on opposite sides of the material and a longitudinal centerline;
• folding said pliable material back on itself near the longitudinal centerline;
• superposing the pliable material side edges;
• closing the pliable material end edges;
• attaching only the superposed end edges to a storage tank floating roof to form a closed seal to render the folded material capable of containing a liquid;
• placing fluent material in said closed seal;
• potitioning a separate scuff band to be interposed between the folded pliable material and a storage tank side wall, said scuff band having top and bottom side edges;
• attaching both of said scuff band side edges to a floating roof;
• supporting the fluent filled pliable material by the scuff band;
• and
• maintaining said pliable material unattached to a storage tank side wall adjacent said scuff band bottom edge.

A seal for use between a floating roof and the wall of a storage tank used for storing fluid, the seal comprising:

• a single thickness flat substantially rectangular sheet of elastomeric material bent back on itself about a line parallel with the long side edges of said rectangular sheet so that such long sides are in superpositioned relationship to form a fluid containing pocket, such superpositioned long sides being attached to a storage tank near the top outside perimeter of such storage tank;
• first attaching means attaching said elastomeric material to a storage tank floating roof, said elastomeric material being attached to such storage tank only by said first attaching means;
• a fluid located within said fluid containing pocket;
• and
• a scuffband attached to a floating roof, said scuffband being separate from said pliable material and including a substantially rectangular sheet of elastomeric material with upper and lower edges, said scuffband upper edge being attached to a storage tank by said first attaching means, said scuffband lower edge being attached to such floating roof by a second attaching means with said upper edge being attached near the top outside perimeter of such floating roof and said lower edge being attached near a surface of said fluid, said scuffband being positioned between said fluid containing pocket and a tank wall and supporting said fluid containing elastomeric material, said pliable material being unattached to such floating roof adjacent said scuffband lower side edge.

A seal for use with floating roofs in storage tanks used for storing fluids, the seal comprising:

• a scuffband attached to a floating roof and including at least one elongate sheet of elastomeric coated fabric, said sheet being positioned to form an annular ring about such floating roof, said scuffband including upper and lower side edges with said upper and lower edges each being attached to such floating roof by first and second attaching means, respectively, said lower side edge being located near the level of fluid stored in a storage tank and said upper side edge being located near the top outside perimeter of such floating roof;
• a separate fluid containing element including at least one elongate sheet of pliable elastomeric material, said sheet of pliable elastomeric material being positioned to form an annular ring and including side edges and end edges, said sheet of pliable elastomeric material being folded back on itself such that said side edges are superposed and attached to such floating roof near the top perimeter of such floating roof, said fluid containing element being attached to such floating roof only by said first attaching means and being unattached to such floating roof adjacent said scuffband lower side edge, said fluid containing element being located between such floating roof and said scuffband, said scuffband supporting said fluid containing element;
• and
• a fluid located within said fluid containing element.