US3587911A - Floating deck for storage tank - Google Patents

Floating deck for storage tank Download PDF

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Publication number
US3587911A
US3587911A US811878A US3587911DA US3587911A US 3587911 A US3587911 A US 3587911A US 811878 A US811878 A US 811878A US 3587911D A US3587911D A US 3587911DA US 3587911 A US3587911 A US 3587911A
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United States
Prior art keywords
deck
floats
floating
floating deck
tank
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Expired - Lifetime
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US811878A
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English (en)
Inventor
Lou C Creith
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Olin Corp
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Olin Corp
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Publication date
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Publication of US3587911A publication Critical patent/US3587911A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/34—Large containers having floating covers, e.g. floating roofs or blankets

Definitions

  • a floating deck for use in liquid storage tanks is provided in which a plurality of individually buoyant floats filled with a polymeric material are used to keep the deck afloat.
  • Floating decks of many types and forms have been proposed and used in tanks designed for the storage of various liquids.
  • a deck may form the roof of the particular storage tank, or may be a separate member within a tank having a fixed roof.
  • the deck floats substantially horizontally on or slightly above the surface of the liquid stored and moves upwardly and downwardly with the surface as the volume of the liquid stored varies.
  • protection is afforded to the liquid stored from the environment above the deck; additionally, evaporation from the area below the deck is retarded.
  • One form of a deck which has been proposed utilizes a plurality of individually, air-filled buoyant floats to keep the deck afloat. This suffers from the disadvantage that the air-filled buoyant floats are susceptible to collapse at low temperatures. Also, by their nature optimum buoyance requires a great many of these floats.
  • a further object of the present invention is to provide an improved floating deck which overcomes the prior disadvantages, some of which are referred to hereinabove.
  • a still further object of the present invention is to provide a floating deck with improved buoyancy characteristics which is relatively easy to fabricate and relatively easy to install and which provides the numerous advantages referred to in the ensuing specification.
  • the floating deck of the present invention comprises:
  • a polymeric foam preferably a rigid polyurethane foam
  • said floats having sufficient buoyance to cause said framework and said material to float above the level of the liquid stored.
  • the present invention also comprises as an additional improvement the provision of a corrugated material as the rigid material impervious to the liquid stored, preferably corrugated metal. This provides numerous advantages in any floating deck, some of which will be seen hereinafter.
  • FIG. I is a perspective view of one form of tank in which a deck according to the instant invention may be employed, with a portion of the tank wall shown broken away to expose the deck in the interior thereof;
  • FIG. 2 is a perspective view of the deck of the present invention removed from the tank with a portion of the upper corrugated surface broken away in order to expose the lower surface more clearly;
  • HO. 3 is a sectional view through lines 3-3 of FIG. 2;
  • FIG. 4 is a sectional view through lines 4-4 of FIG. 2.
  • FIG. 1 illustrates by way of example a floating deck 10 in use in a cylindrical storage tank 11 having a fixed roof l2 and a center pole 13.
  • the floating deck of the present invention may be used in larger storage tanks requiring a plurality of poles 13.
  • the tank 11 contains liquid 14 which may be of any type normally stored in this type of storage tank.
  • Column negotiating device 15 is shown schematically and may be of conventional construction or may be of the type shown in US. Pat. No. 3,409,165. Naturally, other conventional appurtenances may be provided, not shown in the attached drawings, such as a tank manhole, antistatic cables, gauging funnel, tank inlet pipe, antirotational cables, overflow and air vents.
  • the floating deck 10 effectively covers the surface of the liquid 14 by a substantially horizontal framework supporting a number of buoyant floats 20 and rigid sheets 21.
  • the framework 16 has an annular peripheral ring 22 which is spaced from the tank wall.
  • the framework also has a grid of beams 23. It should be noted that in view of the strength provided by the floats of the present invention, it is not necessary to provide crossbeams in order to give the floating deck structural strength. Naturally, in very large tanks, crossbeams or cross girders or partial crossbeams may be provided if desired in order to obtain still further strength.
  • the peripheral ring 22 conforms in configuration to the perimeter of the tank 11 but is spaced laterally inwardly from the tank walls. Within ring 22 are a plurality of spaced coplanar beams 23.
  • the shape of the beams 23 are not critical and may be either of an L-shape, T-shape, I-shape or C-shape or any other convenient shaped cross section.
  • the beams 23 transverse the entire area enclosed by ring 22 and are interconnected to ring 22 at intersecting points 24 by any suitable means such as bolts or rivets.
  • the beams 23 and ring 22 should naturally be formed of a metal such as aluminum.
  • a suitable flexible but resilient sealing means 25 is attached about the periphery of a ring 22 as by nut 26 and bolt 27.
  • sheets 21 are supported by the framework in a substantially horizontal plane.
  • the sheets 21 should be of a rigid material substantially impervious to the liquid stored, such as aluminum sheet.
  • the sheets 21 cover the entire area enclosed by ring 22. If desired, the sheets 21 need not cover the floats.
  • the floats are covered themselves and are impervious to the liquid stored. Hence, one may readily provide one row of floats and one row of sheets in an alternating manner. In the preferred embodiment, however, the sheets completely cover the entire area enclosed by ring 22 for simplicity ofconstruction and for additional strength.
  • Sheets 21 are attached to ring 22 by any convenient method, such as nut 28 and bolt 29. ln addition, a sealing means 30 is preferably provided at the juncture of sheets 21 and ring 22, such as a closed cell, flexible sponge.
  • the material used for sheets'2l may be flat or corrugated. It is preferred in accordance with the present invention to utilize a corrugated sheet as shown in the drawings. This provides the advantage of additional strength and also improves the efficiency of any floating deck. Hence, a corrugated surface which completely covers both the liquid and the floats would readily provide for water drains, shown schematically in H0. 3 at 31, in case of a roof leak since drains could be readily provided at the end of each line of corrugations and the surface may readily be drained.
  • the float 20 is designed to be individually buoyant and has a bottom portion 40 adapted to extend into the liquid, side portions or sidewalls 41 extending upwardly from bottom portion 40 and integral therewith, and integral flanges 42 extending laterally from the upper edges of the sides 41.
  • a cover portion 43 is affixed to flanges 42 enclosing a space within said float 20.
  • the float 20 is filled with a polymeric foam 44 contained within said space. In the preferred embodiment the space is filled with rigid polyurethane foam.
  • a specific illustration of materials which may be used is to provide a rigid polyurethane foam weighing approximately 3 pounds per cubic foot inside a float with a rectangular cross section approximately 4 inches X1 8 inches and 8 inches long. A plurality of these floats on the underside surface of the deck would provide the necessary strength to support personnel walking on top of the deck.
  • This foam material has been found to be satisfactory at a temperature of 65 F. and the deck may readily be walked on while floating on gasoline or other similar materials.
  • the bottom 40 of float 20 extends downwardly into the liquid stored with cover 43 and flanges 42 being attached to beams 23 and sheets 21 by any desired means, such as bolts 45 and nuts 46.
  • any desired means such as bolts 45 and nuts 46.
  • the method of attachment of the floats may be modified to suit the particular deck construction.
  • the floating deck of the present invention provides numerous advantages.
  • the structural strength of the filled floats of the present invention it is possible to eliminate many of the crossbeams heretofore required.
  • the floating deck of the present invention is readily fabricated at a reasonable cost.
  • the increased buoyance of the filled floats of the present invention provides an additional added advantage and readily enables the floating deck of the present invention to be walked on by personnel.
  • corrugated surface of the deck provides an added advantage against leakage as indicated hereinabove and allows dispersal of fluid in case of accidental submersion of part of the deck.
  • adjustable legs 50 These are provided to prevent the deck from reaching the bottom of the tank when the tank is empty.
  • a preferred construction for adjustable legs 50 comprises annular sleeve connected to beams 23 by any desired means.
  • Rod or pipe 52 of greater length than sleeve 51 fits inside sleeve 51 and extends downwardly towards the bottom of the tank.
  • Pipe 52 is provided with a plurality of pinholes for adjusting the height of leg portion 53. Two such pinholes are shown in the drawings, pinhole 54 for low position and pinhole 55 for high position. Thus, if the low position is desired, pin 56 may be inserted in pinhole 54 as shown, with sleeve 51preventing movement of pipe 52.
  • pin 56 is removed from pinhole 54 while the deck is in a higher position, pipe 52 is moved so that pipe pinhole 55 lines up with sleeve pinhole 57 and pin 56 is inserted through pinholes 55' and 57.
  • Flange 58 prevents relative movement of pipe 52.
  • more than two such pinholes may be provided.
  • a floating deck for use in a storage tank containing a liquid comprising:
  • said floats having sufficient 'buoyancy to cause said framework and said material to float above the level of the liquid stored.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Revetment (AREA)
US811878A 1969-04-01 1969-04-01 Floating deck for storage tank Expired - Lifetime US3587911A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US81187869A 1969-04-01 1969-04-01

Publications (1)

Publication Number Publication Date
US3587911A true US3587911A (en) 1971-06-28

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ID=25207843

Family Applications (1)

Application Number Title Priority Date Filing Date
US811878A Expired - Lifetime US3587911A (en) 1969-04-01 1969-04-01 Floating deck for storage tank

Country Status (5)

Country Link
US (1) US3587911A (enrdf_load_stackoverflow)
BR (1) BR7017457D0 (enrdf_load_stackoverflow)
DE (1) DE2015354C3 (enrdf_load_stackoverflow)
FR (1) FR2042239A5 (enrdf_load_stackoverflow)
GB (1) GB1238432A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861555A (en) * 1972-12-22 1975-01-21 Ardell H Nelson Floating cover for a tank
US3972444A (en) * 1975-04-10 1976-08-03 Pittsburgh Des Moines Steel Company Floating roof having uniformly distributed buoyancy means
USRE29270E (en) * 1972-12-22 1977-06-21 Floating cover for a tank
US5230436A (en) * 1992-05-29 1993-07-27 Texaco Inc. Liquid storage tank with floating roof structure
US5305905A (en) * 1993-03-08 1994-04-26 Amerada Hess Corporation Vapor tight floating roof support leg for liquid storage tank
US5353941A (en) * 1993-05-26 1994-10-11 Chicago Bridge & Iron Technical Services Company Adjustable floating roof supports for reduced vapor loss
US6290083B1 (en) * 1997-02-25 2001-09-18 Petroleo Brasileiro S.A. Heating system for tanks for assembly for supporting the floating roofs of tanks for storing liquids
RU2305654C2 (ru) * 2005-11-02 2007-09-10 Анатолий Анатольевич Андреев Резервуар с плавающим покрытием для технологических операций с нефтью или нефтепродуктами
RU2374159C1 (ru) * 2008-06-09 2009-11-27 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Способ предохранения нефти и нефтепродуктов от испарения при хранении в резервуарах
US20100140182A1 (en) * 2008-12-04 2010-06-10 Chapman John R Apparatus and method for separating and isolating components of a biological fluid
US20130284741A1 (en) * 2011-01-14 2013-10-31 Nippon Steel & Sumitomo Metal Corporation Floating body
US11161685B2 (en) 2018-07-19 2021-11-02 Reg MacLeod Light footing shoring of a floating roof inside a tank during tank inspection and maintenance
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems
CN116280734A (zh) * 2021-12-20 2023-06-23 中国石油化工股份有限公司 浮盘及储罐

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3724704A (en) * 1971-04-13 1973-04-03 Pittsburgh Des Moines Steel Floating roof having uniformly distributed buoyancy means
DE3141797A1 (de) * 1981-10-21 1983-04-28 G + H Montage Gmbh, 6700 Ludwigshafen Tank, insbesondere rohoeltank, mit einem schwimmdach
GB2152996B (en) * 1984-01-14 1988-01-06 Motherwell Bridge Fabricators Floating roofs
DE3636866A1 (de) * 1986-10-30 1988-05-11 Fritz Reinke Abdeckung fuer mit fluessigkeit gefuellte becken
NL9000684A (nl) * 1990-03-22 1991-10-16 Alexander Faber Pieter Hugo Al Drijvend tankdak van kunststofmateriaal.
WO2007065198A1 (en) * 2005-12-08 2007-06-14 Paul Dalley Mineral tank floating cover and method of vapour recovery
CN108671586B (zh) * 2018-04-25 2021-03-16 榆林学院 一种焦油氨水澄清储罐及焦油氨水澄清系统
EP4477578A1 (en) * 2023-06-15 2024-12-18 EPT - Environmental Protection Technology for Storage Tanks GmbH Floating roof for liquid storage tanks with inclined surface

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3861555A (en) * 1972-12-22 1975-01-21 Ardell H Nelson Floating cover for a tank
USRE29270E (en) * 1972-12-22 1977-06-21 Floating cover for a tank
US3972444A (en) * 1975-04-10 1976-08-03 Pittsburgh Des Moines Steel Company Floating roof having uniformly distributed buoyancy means
US5230436A (en) * 1992-05-29 1993-07-27 Texaco Inc. Liquid storage tank with floating roof structure
US5305905A (en) * 1993-03-08 1994-04-26 Amerada Hess Corporation Vapor tight floating roof support leg for liquid storage tank
US5353941A (en) * 1993-05-26 1994-10-11 Chicago Bridge & Iron Technical Services Company Adjustable floating roof supports for reduced vapor loss
US6290083B1 (en) * 1997-02-25 2001-09-18 Petroleo Brasileiro S.A. Heating system for tanks for assembly for supporting the floating roofs of tanks for storing liquids
RU2305654C2 (ru) * 2005-11-02 2007-09-10 Анатолий Анатольевич Андреев Резервуар с плавающим покрытием для технологических операций с нефтью или нефтепродуктами
RU2374159C1 (ru) * 2008-06-09 2009-11-27 Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт имени Г.В. Плеханова (технический университет)" Способ предохранения нефти и нефтепродуктов от испарения при хранении в резервуарах
US8177072B2 (en) 2008-12-04 2012-05-15 Thermogenesis Corp. Apparatus and method for separating and isolating components of a biological fluid
US20100140182A1 (en) * 2008-12-04 2010-06-10 Chapman John R Apparatus and method for separating and isolating components of a biological fluid
US20120122649A1 (en) * 2008-12-04 2012-05-17 Chapman John R Apparatus and method for separating and isolating components of a biological fluid
US20120193274A1 (en) * 2008-12-04 2012-08-02 Chapman John R Apparatus and method for separating and isolating components of a biological fluid
US8506823B2 (en) * 2008-12-04 2013-08-13 Thermogenesis Corp. Apparatus and method for separating and isolating components of a biological fluid
US8511480B2 (en) * 2008-12-04 2013-08-20 Thermogenesis Corp. Apparatus and method for separating and isolating components of a biological fluid
US8511479B2 (en) * 2008-12-04 2013-08-20 Thermogenesis Corp. Apparatus and method for separating and isolating components of a biological fluid
US9375661B2 (en) 2008-12-04 2016-06-28 Cesca Therapeutics, Inc. Apparatus and method for separating and isolating components of a biological fluid
US20130284741A1 (en) * 2011-01-14 2013-10-31 Nippon Steel & Sumitomo Metal Corporation Floating body
US11548725B2 (en) 2013-03-15 2023-01-10 Industrial & Environmental Concepts, Inc. Cover systems, tank covering methods, and pipe retention systems
US11161685B2 (en) 2018-07-19 2021-11-02 Reg MacLeod Light footing shoring of a floating roof inside a tank during tank inspection and maintenance
CN116280734A (zh) * 2021-12-20 2023-06-23 中国石油化工股份有限公司 浮盘及储罐

Also Published As

Publication number Publication date
DE2015354C3 (de) 1975-12-04
DE2015354A1 (de) 1970-10-29
GB1238432A (enrdf_load_stackoverflow) 1971-07-07
FR2042239A5 (enrdf_load_stackoverflow) 1971-02-05
BR7017457D0 (pt) 1973-03-08
DE2015354B2 (de) 1975-04-24

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