US3902239A - Method for constructing a floating roof tank - Google Patents

Method for constructing a floating roof tank Download PDF

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Publication number
US3902239A
US3902239A US522016A US52201674A US3902239A US 3902239 A US3902239 A US 3902239A US 522016 A US522016 A US 522016A US 52201674 A US52201674 A US 52201674A US 3902239 A US3902239 A US 3902239A
Authority
US
United States
Prior art keywords
tank
floating roof
pontoons
roof
side wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US522016A
Other languages
English (en)
Inventor
Takao Hirota
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Kanetsu KK
Original Assignee
Toyo Kanetsu KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Kanetsu KK filed Critical Toyo Kanetsu KK
Application granted granted Critical
Publication of US3902239A publication Critical patent/US3902239A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • B65D88/36—Large containers having floating covers, e.g. floating roofs or blankets with relatively movable sections
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/4984—Retaining clearance for motion between assembled parts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49877—Assembling or joining of flexible wall, expansible chamber devices [e.g., bellows]

Definitions

  • ABSTRACT A method for constructing a floating roof tank without [30] Foreign Application Priority Data using a high scaffold within the tank, wherein, when a N 15 1973 J 48 128632 side wall of the tank is built up to a certain level, a apan number of short angle supports are errected on a bottom plate of the tank for forming a floating roof [52] US. Cl 29/454, 29/421 thereon by assembling and Welding a deck plate and a 5] I t Cl B23 19/04 number of pontoons.
  • the float- [56] References Clted ing roof is maintained at the lifted level to make a UNITED STATES PATENTS working space thereunder for carrying out the neces- 2,304,354 12/1942 Harvey 1 13/120 R sary w0rks 2,511,873 6/1950 Perkins 113/120 R X 3,057,054 10/1962 Barnes 29/429 8 Claims, 2 Drawing Figures METHOD FOR CONSTRUCTING A FLOATING ROOF TANK BACKGROUND OF THE INVENTION
  • This invention relates to a method for constructing a floating roof tank. More particularly, the invention concerns a method for constructing a floating roof tank, which can contribute to facilitate the construction work and at the same time to reduce the amount or number of scaffolding materials and working equipments to a considerable degree as compared with the conventional methods.
  • the method comprises the steps of erecting a number of short angle supports on a bottom plate of a tank when a side wall of said tank is built up to a given level; forming a floating roof and on the errected angle supports by securely welding a deck and a number of pontoons to each other; securing inflatable sealing means around the outer periphery of the connected pontoons; feeding compressed air to said sealing means for hermetically sealing a gap between said side wall of said tank and said pontoons; blowing air into a closed space beneath said floating roof to float the same horizontally up to a predetermined level with aid of pulling means to make a working space beneath said roof; and fixing said roof at the elevated level on a number of support columns of a predetermined length.
  • FIG. 1 is a diagrammatic sectional view generally showing a floating roof tank under construction according to the method of the invention.
  • FIG. 2 is a fragmentary sectional view showing on an enlarged scale one portion of the tank of FIG. 1.
  • FIGS. 1 and 2 when the side wall of a tank 1 is built up to a suitable level as shown at 2, for example, to the level of the second row, a number of low working supports 4 is erected on a bottom plate 3 of the tank with use of short angle or round steels having a length of, for example, 500 mm. Thereafter, a floating roof 7 is formed by assembling a deck plate 6 and a number of pontoons 5 with use of a crane or other suitable lifting means. The deck plate 6 and pontoons are welded hermetically to each other, and a sealing means 8 having a rubber scarf band is fixed around the outer periphery of the welded pontoons 5.
  • the air sealing means 8 is connected by means of an air feed pipe 14 to an air compressor 9 which is located outside the tank 1.
  • a blower 9 is fixedly mounted on the deck 6 and has at its output end opened into the deck 6.
  • a number of apertured connecting pieces 13 are fixed securely on the pontoons 5 at a suitable distance from adjacent ones.
  • a corresponding number of similar apertured connecting pieces 13 are securely fixed on the inner surface of the side wall 2 in vertical alignment or to form pairs with the apertured pieces 13 on the pontoons 5.
  • a wire rope or chain 10 is threaded through the apertures 12, 12' of the upper and lower connecting pieces I3, 13.
  • the wire rope 10 is fixed by a shackle l5 and is provided with a universal puller (hoisting chain block) 11 to wind up the ropes or chains 10 as will be explained hereinlater.
  • a number of openings are bored through the pontoons and the deck plate for inserting therethrough support guide pipes or sleeves 17 each with a pin hole 19.
  • the support guide pipes 17 are fixed in the respective openings, each slidably receiving therethrough a support column 18 with a pin hole 19.
  • the support guide pipes 17 are fixed on the support columns by inserting and fixing pins in the pin holes 19 and 16 of the support columns 18 and the support guide pipes 17. After fixing the support guide pipes 17, the amount of air from the blower 9 is gradually reduced.
  • the blower 9 is switched off after confirming that the lower ends of the respective support columns are lowered to the level of the bottom plate 3. In this manner, a working space is made under the roof 7 to carry out the necessary work.
  • the construction of the floating roof tank may be completed without using a high scaffold so that it becomes possible to reduce the costs which would otherwise be incurred in connection with procuration, transportation and errection or disassembling of the scaffold materials.
  • a high scaffold For example, for the construction of a 160,000 KI tank, it has thus far been required to errect a scaffold having a height of about 1800 mm, using about 110 tons of scaffold materials including channel and angle steels.
  • the removal of such a scaffold after completion of the work usually takes at least three days by eight workmen.
  • the method according to the invention does not necessiate the errection of a high scaffold, and the deck support can be formed with use of only 9 tons of 500 mm long angle steels and removed in only two hours by two workmen.
  • the construction work can be carried out on low deck supports in a far safer manner as compared with the conventional methods.
  • the cost and time of the construction can be reduced to a considerable degree since the necessary construction work can be carried out with use of a reduced amount of materials and few equipments. including a compressor, blower and pulling wire ropes or chains.
  • leveling of the floating roof is carried out by means of the hoisting blocks so that any types of floating roof tank, such as a center pontoon typc tank, a buoy roof type tank. a tank having double deck roof and so on. can be constructed by the present invention.
  • a method for constructing a floating roof tank comprising the steps of:
  • each of said pulling means has a universal puller at a suitable position within the length thereof.
  • said inflatable sealing means is a scarf band securely connected to the outer periphery of said pontoons.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Tents Or Canopies (AREA)
US522016A 1973-11-15 1974-11-08 Method for constructing a floating roof tank Expired - Lifetime US3902239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12863273A JPS532485B2 (de) 1973-11-15 1973-11-15

Publications (1)

Publication Number Publication Date
US3902239A true US3902239A (en) 1975-09-02

Family

ID=14989598

Family Applications (1)

Application Number Title Priority Date Filing Date
US522016A Expired - Lifetime US3902239A (en) 1973-11-15 1974-11-08 Method for constructing a floating roof tank

Country Status (3)

Country Link
US (1) US3902239A (de)
JP (1) JPS532485B2 (de)
GB (1) GB1489564A (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529134B2 (en) * 2001-03-21 2003-03-04 Hmt, Inc. Remote adjustment device and method
WO2004067408A1 (en) * 2003-01-31 2004-08-12 Kai Chye Stephen Seow Panels for floating covers, floating covers and methods for making them
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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5292912A (en) * 1976-02-02 1977-08-04 Koyo Kensetsu Kougiyou Kk Airrlifting method of foating roof tanks

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2304354A (en) * 1940-02-01 1942-12-08 Stacey Brothers Gas Constructi Method of increasing the height of storage tanks
US2511873A (en) * 1950-06-20 Method of constructing lift-type
US3057054A (en) * 1959-01-19 1962-10-09 Herschel E Barnes Method for erecting steel tanks and similar enclosed structures
US3106772A (en) * 1959-08-20 1963-10-15 Gordon B Holcombe Method of erecting buildings, tanks, domes or similar structures
US3315343A (en) * 1964-04-13 1967-04-25 Bendix Corp Method of constructing a building

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2511873A (en) * 1950-06-20 Method of constructing lift-type
US2304354A (en) * 1940-02-01 1942-12-08 Stacey Brothers Gas Constructi Method of increasing the height of storage tanks
US3057054A (en) * 1959-01-19 1962-10-09 Herschel E Barnes Method for erecting steel tanks and similar enclosed structures
US3106772A (en) * 1959-08-20 1963-10-15 Gordon B Holcombe Method of erecting buildings, tanks, domes or similar structures
US3315343A (en) * 1964-04-13 1967-04-25 Bendix Corp Method of constructing a building

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6529134B2 (en) * 2001-03-21 2003-03-04 Hmt, Inc. Remote adjustment device and method
WO2004067408A1 (en) * 2003-01-31 2004-08-12 Kai Chye Stephen Seow Panels for floating covers, floating covers and methods for making them
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

Also Published As

Publication number Publication date
JPS5078913A (de) 1975-06-27
GB1489564A (en) 1977-10-19
JPS532485B2 (de) 1978-01-28

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