KR20170001899U - Hull damage prevention apparatus for ship to ship LNG transferring - Google Patents

Hull damage prevention apparatus for ship to ship LNG transferring Download PDF

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Publication number
KR20170001899U
KR20170001899U KR2020150007599U KR20150007599U KR20170001899U KR 20170001899 U KR20170001899 U KR 20170001899U KR 2020150007599 U KR2020150007599 U KR 2020150007599U KR 20150007599 U KR20150007599 U KR 20150007599U KR 20170001899 U KR20170001899 U KR 20170001899U
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KR
South Korea
Prior art keywords
lng
storage member
hull
pipe
ship
Prior art date
Application number
KR2020150007599U
Other languages
Korean (ko)
Inventor
장인호
김정환
최중효
박창열
오영태
Original Assignee
대우조선해양 주식회사
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.)
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Publication date
Application filed by 대우조선해양 주식회사 filed Critical 대우조선해양 주식회사
Priority to KR2020150007599U priority Critical patent/KR20170001899U/en
Publication of KR20170001899U publication Critical patent/KR20170001899U/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B59/00—Hull protection specially adapted for vessels; Cleaning devices specially adapted for vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/24—Arrangement of ship-based loading or unloading equipment for cargo or passengers of pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B27/00—Arrangement of ship-based loading or unloading equipment for cargo or passengers
    • B63B27/30—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures
    • B63B27/34—Arrangement of ship-based loading or unloading equipment for transfer at sea between ships or between ships and off-shore structures using pipe-lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67D—DISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D9/00—Apparatus or devices for transferring liquids when loading or unloading ships
    • B67D9/02—Apparatus or devices for transferring liquids when loading or unloading ships using articulated pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D1/00—Pipe-line systems
    • F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17D—PIPE-LINE SYSTEMS; PIPE-LINES
    • F17D5/00—Protection or supervision of installations

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The present invention relates to a hull damage prevention system for LNG transport, and more particularly, to a system for preventing leakage of LNG from an offloading LNG piping connection used for ship to ship LNG transferring, And a drip tray at the bottom of each LNG pipe to protect the hull even if the LNG leaks through the LNG pipe.
According to the present invention, there is provided an apparatus for preventing damage to a hull in an LNG transporting from a first position to a second position in the ocean, comprising: an LNG pipe for transferring the LNG from the first position to the second position; A connecting portion connecting between the LNG pipes; A first LNG storage member surrounding the connection portion and storing the LNG leaking from the connection portion; And a first outlet for discharging vaporized gas in the first LNG storage member.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hull damage prevention apparatus for ship-

The present invention relates to a hull damage prevention system for LNG transportation, and more particularly, to a system for preventing leakage of LNG from an offloading LNG piping connection used for ship to ship LNG transferring, And a drip tray at the bottom of each LNG pipe to protect the hull even if the LNG leaks through the LNG pipe.

Generally, LNG is a methane-based natural gas cooled to approximately -163 ° C, reducing its volume by one-sixth, and is suitable for long distance transportation through the sea. In addition to the LNG carriers, there are LNG RVs (Regasification Vessels), which are loaded with LNG and arrive at the land area after landing on land, reloading the stored LNG and unloading it as natural gas. There is a growing demand for floating marine structures such as LNG FPSO (Floating, Production, Storage and Offloading) and LNG FSRU (Floating, Storage and Regasification Unit).

Also, as a technique related to the conventional transfer of the line-by-line LNG, there is a pre-liquefied liquefied gas transfer system and method of Korean Patent Laid-Open No. 10-2011-0097090. This is a line-by-line liquefied gas delivery system for transferring liquefied gas between an anchored first vessel and a second vessel forming an interval, the system comprising: a messenger line being thrown from the first vessel to the second vessel; A support hose installed on the first vessel and connected to one end of the messenger line in an intermediate region to be pulled from the first vessel to the second vessel by the messenger line and to which seawater or fresh water is injected or discharged; And a cryogenic flexible hose supported and moved by the support hose connecting the first vessel and the second vessel to connect the first vessel and the second vessel.

However, when the LNG leaks from the connecting portion of the LNG pipeline in the process of transferring the LNG pipeline to the hull, the conventional techniques cause damage to the hull due to brittle fracture due to the cryogenic LNG (-100 ° C or less) .

Korean Patent Publication No. 10-2011-0097090 (Aug. 31, 2011)

In order to solve these conventional problems, the present invention has been made to solve the above-mentioned problems by installing a storage member for storing LNG leaking from an offloading LNG pipe connection portion used for ship to ship LNG transferring, The purpose is to protect the hull even if the LNG leaks through the LNG piping by providing the trays respectively.

According to an aspect of the present invention, there is provided an apparatus for preventing damage to a hull in an ocean from a first position to a second position, the apparatus comprising: an LNG conveying LNG from the first position to the second position; pipe; A connecting portion connecting between the LNG pipes; A first LNG storage member surrounding the connection portion and storing the LNG leaking from the connection portion; And a first outlet for discharging vaporized gas in the first LNG storage member.

An on-off valve for controlling the LNG transport to the LNG pipe; An engaging portion for engaging the LNG pipe with the opening / closing valve; A second storage member surrounding the coupling portion and storing the LNG leaking from the coupling portion; And a second discharge port for discharging vaporized gas in the second storage member.

The first and second storage members are preferably made of silicone rubber capable of withstanding LNG at extremely low temperatures.

It is preferable that the first storage member and the second storage member are provided so that there is no part to be opened except for the discharge port so that the leaked LNG is not dispersed, and the first discharge port and the second discharge port are provided so as to discharge only gas .

The first storage member and the second storage member may be removably coupled to the LNG pipe.

It is preferable that a drip tray is installed along the LNG pipe in order to prevent damage to the hull when the LNG leaks from the first storage member or the second storage member and the drip tray is installed for each of the LNG pipes Do.

The present invention has the effect of protecting the hull even if the LNG leaks by installing a storage member for storing the LNG leaking from the offloading LNG pipe connection used in the ship to ship LNG transferring.

In addition, by providing a drip tray at the bottom of each LNG pipe, a single drip tray fixed to the hull is installed to prevent cracking due to fatigue at the welded portion where the drip tray and the hull are connected, And the number of times is reduced.

1 is a view schematically showing the delivery of a line-by-line LNG according to the present invention.
2 is a view showing a hull damage preventing device in an lNG piping according to the present invention.
3 is a cross-sectional view taken along the line AA 'of the hull damage preventing device provided at the coupling portion of the LNG piping and the open / close valve according to the present invention.
4 is a cross-sectional view of the BB 'of the hull damage prevention device provided at the LNG piping connection portion according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In describing the present invention, a detailed description of the related known structure or function is omitted or simplified in order to clarify the gist of the present invention.

The hull damage preventing apparatus in the LNG transport according to the present invention will be described with reference to Figs. 1 to 4. Fig.

FIG. 1 is a view schematically showing the delivery of a line-by-line LNG according to the present invention, FIG. 2 is a view showing an apparatus for preventing hull damage in an LNG piping according to the present invention, FIG. 3 is a cross- 4 is a sectional view taken along the line BB 'of the hull damage preventing apparatus provided at the LNG piping connection portion according to the present invention.

The hull damage prevention apparatus in the LNG transfer between the first position 100 and the second position 200 in the ocean according to the present invention comprises an LNG pipe (not shown) for transferring the LNG from the first position 100 to the second position 200 A first LNG storage member 175 surrounding the connection portion 170 and storing LNG leaking from the connection portion 170; a first LNG storage member 175 surrounding the connection portion 170; And a first outlet 178 for discharging vaporized gas inside the first LNG storage member 175.

Here, the first position 100 can be moored in a floating state on the sea surface, and is a marine floating structure for producing, storing and unloading a fluid such as crude oil, natural gas, etc., for example, a floating LNGM facility (FLNG) (Floating Production Storage Offloading), FSRU (Floating Storage and Regulation Unit), and the second location 200 may be an LNG carrier carrying an LNG.

As shown in FIG. 1, as shown in FIG. 1, the transfer of the LNG line is carried out between the first vessel 100 and the second vessel 200, respectively, during the LNG transporting process. The LNG pipe 150 connected to the manifold and the LNG supply pipe 250 are connected to each other by a flexible pipe 260 to transfer the LNG between the first and second ships 100 and 200.

The connection part 170 connecting between the LNG pipe 150 and the LNG pipe 150 may be welded or flanged to be fixed and there is a possibility that the LNG leaks from the connection part 170 when the LNG is off loaded. Since leakage of cryogenic LNG may cause serious damage to the hull or the like, a device for protecting the hull from LNG leaking from the connection portion 170 should be provided.

According to the present invention, a first LNG storage member 175 may be provided to store LNG leaking from the connection portion 170 connecting between the LNG pipes 150. The leaked LNG is stored in the first LNG storage member 175 in such a manner that the leaked LNG is not dispersed by the first discharge port 178. Thus, 178. < / RTI >

In the present invention, the LNG pipe 150 may be provided with an on-off valve 160 for controlling the transfer of LNG, and the LNG is leaked to the coupling part 161 for coupling the LNG pipe 150 and the on- The second storage member 165 that surrounds the coupling portion 161 and stores the leaked LNG may be provided and the second storage member 165 may be provided with the second storage member 165, And may include an outlet 168. The coupling portion 161 is connected to the LNG pipe at both ends of the opening and closing valve 160 and the second storage member 165 may surround the entire opening and closing valve 160.

The first storage member 175 and the second storage member 165 have a closed structure as a whole and the portion excluding the portion for storing the LNG need not strictly be kept airtight and the LNG pipe 150 Or LNG piping 150 or the coupling portion 161 of the LNG piping 150 and the opening and closing valve 160 from the LNG piping 150 to the first storage member 175 can be detachably coupled. For example, a fastening member (not shown) such as a bolt on the top of the first storage member 175 and the second storage member 165.

The first storage member 175 and the second storage member 165 may be made of a material resistant to cryogenic temperatures such as stainless steel, aluminum or an alloy thereof, and elastic silicone rubber such as a Teflon sheet. The silicone rubber may be suitably applied to relax or shrink the LNG piping 150.

The first outlet 178 and the second outlet 168 are connected to the first storage member 175 and the second storage member 165 in order to discharge the gas generated by the vaporization of the LNG in the first storage member 175 and the second storage member 165, Shaped pipe, and the like, and may be formed as a straight discharge pipe in order to block the introduction of foreign matter from above as in the present embodiment.

The first storage member 175 and the second storage member 165 may be provided as a primary prevention measure for preventing the leakage of the LNG. In addition, the first storage member 175 and the second storage member 165 may be provided as a secondary prevention measure, Drip trays may be installed along the path where the LNG piping is installed to prevent damage to the hull when the LNG leaks from the storage member 165.

Conventionally, a single drip tray having one side fixed to the hull is installed under a plurality of LNG pipes used for off-loading. However, hogging and sagging are repeated due to the marine environment conditions, There is a problem that cracks due to fatigue occur in the welded portion to be connected.

In the present invention, a single drip tray is not provided for a plurality of LNG pipes in order to prevent a cracking problem due to fatigue damage, and to reduce material and time, but each drip tray 120 Can be provided.

As a result, the drip tray 120 can prevent a crack due to fatigue damage by reducing the area of the welded portion connected to the hull 110 much more than in the prior art.

The hull damage prevention device in the LNG transfer between the first position and the second position in the ocean according to the present invention constructed as described above is capable of preventing leakage of the offloaded LNG piping connection used in the ship to ship LNG transferring It is possible to protect the hull even if the LNG leaks through the LNG piping by installing a storage member for storing the LNG and providing a drip tray at the bottom for each LNG piping.

In addition, when the pressurized LNG leaks in an arbitrary direction, it is possible to prevent damage to the surrounding hull or equipment to prevent damage thereof, and to maintain safety. Also, The safety can be maintained and the joints can be easily separated, which makes it easy to inspect, repair and replace valves, flanges, etc., which may leak liquefied gas.

Although the present invention has been described with reference to the drawings, it is to be understood that the invention is not limited to the embodiments and drawings described above, It will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

100: first position 110: hull
120: drip tray 130: welded portion
150: LNG piping 160: opening / closing valve
165: second storage member 168: first outlet
170: connection portion 175: first storage member
178: second outlet 200: second position
250: LNG supply pipe 260: Flexible piping

Claims (6)

CLAIMS 1. An apparatus for hull damage prevention in LNG transport between a first location and a second location in the ocean,
An LNG piping for transporting the LNG from the first location to the second location;
A connecting portion connecting between the LNG pipes;
A first LNG storage member surrounding the connection portion and storing the LNG leaking from the connection portion; And
And a first outlet for discharging vaporized gas inside the first LNG storage member. The method according to claim 1,
An on-off valve for controlling the LNG transport to the LNG pipe;
An engaging portion for engaging the LNG pipe with the opening / closing valve;
A second storage member surrounding the coupling portion and storing the LNG leaking from the coupling portion; And
And a second outlet for discharging the vaporized gas inside the second storage member. The method of claim 2,
Wherein the first and second storage members are silicone rubber materials capable of withstanding cryogenic LNG. The method of claim 2,
The first storage member and the second storage member may include a first storage member,
So that the leaked LNG is not dispersed.
Wherein the first outlet and the second outlet are provided so as to discharge only gas. The method of claim 2,
The first storage member and the second storage member may include a first storage member,
And is detachably coupled to the LNG piping. The method of claim 2,
A drip tray is installed along the LNG pipe to prevent damage to the hull when the LNG leaks from the first storage member or the second storage member,
Wherein the drip tray is installed for each of the LNG pipelines.
KR2020150007599U 2015-11-23 2015-11-23 Hull damage prevention apparatus for ship to ship LNG transferring KR20170001899U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020150007599U KR20170001899U (en) 2015-11-23 2015-11-23 Hull damage prevention apparatus for ship to ship LNG transferring

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Application Number Priority Date Filing Date Title
KR2020150007599U KR20170001899U (en) 2015-11-23 2015-11-23 Hull damage prevention apparatus for ship to ship LNG transferring

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KR20170001899U true KR20170001899U (en) 2017-05-31

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110097090A (en) 2010-02-24 2011-08-31 삼성중공업 주식회사 System and method for ship-to-ship transferring liquefied gas

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110097090A (en) 2010-02-24 2011-08-31 삼성중공업 주식회사 System and method for ship-to-ship transferring liquefied gas

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