KR20070018754A - A system for storage or transport of compressed gas on a floating structure - Google Patents

Abstract

A system comprising an assembly for storing or transporting compressed gas in a floating structure, wherein the assembly (3) is a plurality of separate, parallel transversely closed at both ends and separated or supported by the support structure (5). A pipe 4 that is laid. This pipe 4 is releasably attached to the support structure 5 only at one end, where the pipe is connected to the manifold system (~) to fill or empty the pipe, and the support structure 5 is connected to the storage assembly. The pipe 4 in 3 is aligned so that it is guided in the longitudinal direction without being blocked, so that the pipe in each or group is in its storage assembly through an opening at the end of the assembly opposite the one end. It may be guided or removed from. Also a method of installing pipes in a floating structure with such a storage assembly, wherein each pipe 4 is provided to a production plant and guided from there to the storage assembly, the floating structure being ballasted to a predetermined draft to provide substantial The pipe is guided directly to the correct position of the storage assembly.

Pipes, support structures, floating structures, compressed gas, manifold systems.

Description

FIELD OF STORAGE OR TRANSPORT OF COMPRESSED GAS ON A FLOATING STRUCTURE}

A system comprising an assembly for storing or transporting compressed gas in a floating structure, the system comprising a plurality of separate parallelly placed pipes supported by the support structure and closed at both ends.

The invention also relates to a method for installing a pipe in a floating structure having a state-of-the-art storage system.

At present, the transport of natural gas is carried out using a pipeline of liquefied natural gas (LNG) in addition to the use of pipelines. Recently, there has been a growing interest in the possibilities associated with the transport of compressed natural gas (CNG). Various compressed natural gas delivery systems have been developed with only high pressure or based on a combination of pressure and low temperature.

Examples of the prior art are US patents US 3 863 460, US 4 846 088 and US 6 584 781.

US 3 863 460 discloses a storage assembly comprising a plurality of elongated containers that are rigidly attached, independent of one another and sealed at both ends. The expansion tanks are connected to each other in common with all the containers to receive the expansion medium from each container. Since the devices are provided in common with all containers to discharge and fill each container, the assembly can handle a large amount of liquefied gas, liquid, and the like.

US 4 846 088 discloses a system for transporting compressed gas on the deck of a marine vessel or on water in order to discharge minor gas into the atmosphere and avoid the gradual enrichment of dangerous gases.

US Pat. No. 6,584,781 discloses a method and system for conveying compressed gas on a floating vessel. This system is of the type mentioned above, which comprises a plurality of separate parallelly laid pipes supported by the support structure and closed at both ends. The plurality of pipes are connected by manifolds and the gas storage system is designed to operate in the region of the optimum compression factor for the given gas composition. It is an object to provide an optimal system for the storage and transport of compressed gas. The optimum conditions are described as being obtained by maintaining the pressure and lowering the temperature while minimizing the compression factor.

It is a primary object of the present invention to provide a system for the storage or transportation of compressed gas which gives improved safety and cost efficiency compared to currently known compressed natural gas delivery systems.

It is a further object of the present invention to provide a state-of-the-art system in which the storage assembly is arranged as deck load cargo, so as not to interfere with the structure of the floating structure, especially when the floating structure is a ship.

It is a further object of the present invention to provide a state-of-the-art system which is simple to operate with several valves, can be inspected and repaired, is easy to maintain, allows the drainage of liquid deposits and efficient emptying of the tank, and has a long service life To provide.

It is a further object of the present invention to provide a method for installing a pipe in a floating structure, wherein when arranged in a vessel the pressure gas pipe can be floated directly to or from the rear part of the storage assembly.

In order to achieve the above object, according to the present invention, the pressure gas pipe is detachably attached to the support structure only at one end of the pipe to which the pipe is connected to the manifold system for filling or emptying the pipe, and the support structure is detached from the assembly. Since the pipes are arranged so as not to interfere with the longitudinal guidance of the pipes, the pipes can be introduced into or removed from the operating position of the assembly individually or in groups via an opening at the end of the assembly disposed opposite the one end. A system of the type mentioned at the outset is provided.

 According to the invention, there is also provided a method for installing a pipe on a floating structure with a storage assembly according to the invention, the pipes being carried one by one on a mounting table arranged in an onshore storage plant and adjusted in the vertical and horizontal directions. The mounting table together with the pipe is thus placed in a precisely correct straight position relative to the associated introduction channel of the storage assembly, after which the pipe is pushed or pulled in front of the storage assembly and the mounting position of the assembly.

The invention is described in more detail below with respect to exemplary embodiments with reference to the drawings.

1 to 3 are side, top and end views of a single hull type vessel having a storage assembly according to the invention;

4 is an enlarged view of the front portion of the vessel of FIGS. 1 to 3;

5-7 are side, top, and end views of a multi hull vessel with storage assembly according to the present invention;

8 is a cross-sectional perspective view of an example of a hull design for a vessel of the type according to FIGS. 1 to 3;

9 is a partial cross-sectional perspective view of the rear portion of a multi hull vessel in which the storage assembly is partially shown;

FIG. 10 is an end view similar to FIG. 3 including a pipe support framework adapted to receive a pipe receiving cassette; FIG.

FIG. 11 is an end view similar to FIG. 10 with the storage assembly for the pressure pipe arranged in a closed space;

12 is a partial perspective view of a support bulkhead with support blocks for pressure pipes and holes for receiving lining pipes;

13 is an enlarged partial perspective view of a support bulkhead with support blocks for pressure pipes and holes for receiving support pipes;

14 is an enlarged partial perspective view of a supporting bulkhead;

15 is a partial perspective view of the lining pipe in the enclosing lightweight concrete mass;

16A-B are perspective views of prefabricated concrete components having a substantially triangular cross section to construct a support beam for supporting pipes;

17 is a perspective view of the lightweight concrete component according to FIGS. 16A-B with respect to the end connection element of higher grade concrete;

18A-B are perspective views of prefabricated concrete components having a Y-shaped cross section;

19 is a partial perspective view of the manifold system of the storage assembly, showing three manifold spaces each including a vertically extending group manifold to which the associated pressure pipe is connected to the front end;

FIG. 20 is a view similar to FIG. 19 with the compartment in the manifold space omitted;

21 and 22 are enlarged detail views of FIG. 19 for the top and bottom of the group manifold to which pressure pipes are connected;

FIG. 23 is a further enlarged view of FIG. 21; FIG.

24 illustrates a method for installing a pipe in a storage assembly according to the present invention;

25 illustrates a method that can be used to install and replace pipes in a storage assembly; And

FIG. 26 illustrates a method for installing a pipe manufactured at an onshore facility.

In the following description, a system according to the invention will be described with reference to a single hull and double hull type carrier as shown in Figs. However, the system can also be installed and used in other types of floating systems such as barges and offshore platforms.

1 to 3 show side, top and end views, respectively, of a single hull vessel 1 incorporating a system according to the invention. The concern for ships here is to have large deck areas and large deck lengths. In order to obtain the longest possible straight pipe lengths stacked on the deck of the ship, for example, the ship can have a length of 395 meters and a width of 70 meters. Above the deck 2, the storage assembly 3 is arranged in the form of a laminated pipe 4, which in the illustrated embodiment has a diameter of 48 inches and a length of 350 meters and comprises 546 pipes closed at both ends. have. This gives a gas loading capacity of 200,000 m ³ . Ships must have sufficient stability and drainage to carry very large deck cargo in a safe manner, and it is of interest to load up to 250,000 tonnes on deck for the largest structures.

The storage assembly 3 is placed on the deck 2 to avoid integrating the cargo receiving unit in the ship structure. This is advantageous to keep the complexity at an acceptable level while the ship is being built.

The pipe of the storage assembly is supported by a support structure 5 which can be constructed in a variety of ways and can be made of a steel framework, for example as proposed in FIG. 3. Various advantageous embodiments of the support structure will be further described later. In the support structure according to the invention, the pipe 4 is detachably attached to the ship only at the front end of the support structure, ie only at the front end of the ship. The pipe is here connected to a manifold system 6 for filling or emptying the pipe. Since the support structure 5 is configured so as not to disturb the longitudinal guidance of the pipe 4 in the storage assembly, the pipes are introduced individually or in groups into the operating position of the assembly through the opening at the rear end of the assembly, ie at the stern of the ship. Can be removed or removed.

Because the pipe is attached to the support structure only at the front end and is slidably supported by the support structure from another point of view, the pipe can freely expand and contract in the longitudinal direction, causing pressure and temperature changes to occur during operation of the system. In this case, it may expand and contract in the radial direction.

The manifold system 6 proposed in FIGS. 1 and 2 is shown in FIG. 4 in a slightly enlarged size, but still schematically. This system will be further described with reference to FIGS. 19 to 23.

As shown in Figs. 1 and 4, the ship 1 has a bottom open receiving space 7 for a so-called Submerged Turret Loading (STL) buoy (not shown) at the bottom. Thus, in operation, the vessel can accommodate STL buoys that can be coupled to the manifold system so that pipes in the storage assembly can be filled or discharged through the buoys.

Figures 5 to 7 show side, top and end views, respectively, of a double hull vessel 10 in the form of a catamaran vessel comprising a system according to the invention. Such vessels may generally have a length of 190 m and a width of 40 m and a displacement of approximately 37000 tons. This gives a compressed gas loading capacity of approximately 18000 m 3. In the case of the ship according to FIGS. 1 to 3 the speed is generally approximately 15 knots, whereas the speed of this vessel can be approximately 25 knots.

As in the case of the ship 1, on the deck 11 of the ship 10, it extends from the front end to the rear end of the ship in the form of a stack of pipes 4, with the front end being the manifold system 6. The storage assembly 3 is arranged to be coupled to the. The pipe is supported by a support structure, which can be of a design similar to the one considered in the ship according to FIGS. 1 to 3 (see FIGS. 8, 12 and 15).

As for the pipe 4, they are closed at both ends, for example by means of a hemispherical end piece as described above. The end pieces may suitably have attachment collars for mounting the towing / handling equipment. The front end of the pipe is coupled to a suitable valve, which in turn is coupled to a manifold system, the rear end of the pipe having a safety valve for emergency ejection and a suitable opening for access for inspection. Such ejection may optionally be carried out at the front end of the pipe equipment. The pipe itself can be made of steel or a suitable composite material or a combination of these materials. When the pipe is empty, the pipe will have substantially neutral buoyancy in water.

As shown in FIGS. 3 and 7, the hull 8 of the vessel 1 has a sidewall forming hull portion 9, while the double hull 12 of the vessel 10 has a sidewall forming hull portion ( 13). The support structure 5 for the pipes in each storage assembly 3 is configured to form a structurally rigid block connected to the deck and sidewall portions of the ship's hull and to contribute to its overall stiffness and strength.

8 shows a cross-sectional perspective view of a portion of the vessel 1 according to FIGS. 1 to 3, showing an example of a hull design. As shown, the hull 8 has a double bottom portion 14 and a double wall hull side portion whose upper portion constitutes the side wall member 9. The side wall member is formed with a plurality of ballast tanks 15 which enable the submersion of the ship so that the pipe 4 at a selected height of the support structure can be floated for the purpose of assembly or disassembly of the pipe. . In the embodiment of FIG. 8, the pipe 4 is supported by a support structure 5 different from the support structure 5 on the ship according to FIGS. 1 to 3. In this embodiment the pipe receiving openings are arranged in a hexagonal pattern as described later in connection with FIGS. 12-15.

FIG. 9 shows a partial cross-sectional perspective view of the rear portion of a double hull vessel 20, in which a pipe 4 disposed on a deck 21 of the vessel in a support structure 16 similar to that shown in FIG. 8. A storage assembly 3 comprising an arrangement is shown in part. The side wall member 13 of the ship has a ballast tank 22 in a manner similar to FIG. 8.

As mentioned above, the support structure for the pipe can be constructed in a number of ways. In the embodiments of FIGS. 1-4 and 5-7 the support structure is arranged at appropriate intervals along the length of the pipe and forms a shell or opening for accommodating the weight and support of the individual pipe. It includes a number of transversely extending frameworks or racks (not shown further in these figures) that include the support elements. As shown in Figures 3 and 7, the support element in this manner forms the shell / opening in a rectangular pattern.

10 and 11 show a cross-sectional view of a vessel 1 with a storage assembly, wherein the support structure is provided with transversely extending frameworks forming a pipe receiving opening in a rectangular pattern as described above. Can be configured. In this embodiment, however, the framework is divided into a number of sections arranged next to each other and divided by a vertical dividing element 23 so that each section is adapted to receive a cassette 24 releasably mounted within the support structure. It contains a lot of space. In the final construction the cassette will constitute the support as described above. Each cassette contains a plurality of pipes (10 pipes in the example shown) disposed adjacent to each other on a suitable support in each cassette. Thus, a group of pipes can be introduced into the storage assembly at the same time or removed from the storage assembly at the same time. By cassette arrangement, individual pipes in the cassette can be connected to the small cassette manifold before being coupled to the main manifold through a single valve. The advantage of this is that it is possible to significantly reduce the number of valves normally operated in the loading operation, while at the same time simplifying the floating of the pipes into and out of the storage assembly, as further explained later. Is the point.

In the embodiment of FIG. 10, as in the embodiment described above, the storage assembly is shown to open upward to the atmosphere. If there is a possibility of leakage from the pressure gas pipe, the leaking gas will escape to the surrounding atmosphere. For safety reasons, this may be undesirable in some cases. In such cases, it would be advantageous to dry the entire storage assembly to an enclosed space.

Such an embodiment is shown in FIG. 11, in which the storage assembly is arranged in a closed space 25 closed upwardly by the roof forming plate element 26.

The closed space 25 may suitably be equipped with one or more sensors 27 for detection of possible gas leakage from the pipe. In addition, the space can be insulated from the surroundings and can be provided with means for cooling the space inside.

It should be noted that in some applications of the system according to the invention it may be of interest to transport the gas partially in liquid state. This is due to the fact that certain gases, in particular weight components such as butane, can condense into liquids.

In the closed form embodiment according to FIG. 11, a gate device (not shown) may be arranged at the rear end of the pipe which can be opened by installation and / or replacement of individual pipes or groups of pipes. In place of the gate arrangement, alternative means may be arranged for this purpose. In embodiments where the storage assembly is not closed, a protective wall will generally be arranged at the rear end of the pipe for protection against waves and or other weather effects. Such a protective wall will also have a gate device suitable for the above-mentioned purposes.

12-18 show a variant embodiment of a support structure for a pressure gas pipe in a storage assembly according to the invention. The illustrated embodiments are of two fundamentally different types, more specifically, structures having a separate support arrangement for pipes (FIGS. 12-14) and structures having a continuum support arrangement for pipes (FIGS. 15-18). have.

FIG. 12 shows a perspective view of a supporting bulkhead 30 segment having openings 31 for receiving and supporting individual pipes 4. In a manner similar to FIGS. 8 and 9, the openings 31 in the bulkhead 30 are arranged in a hexagonal pattern and slightly within the storage assembly than the embodiment of FIG. 3 where the pipe receiving openings are formed in a rectangular pattern. Provides a packing of the stronger pipe 4. The support bulkheads 30 are arranged at appropriate intervals along the length of the pipe 4 and provide separate support of the pipe.

The bulkhead is dried in the sandwich structure which consists of the porous steel plate 34 with the intermediate mass 33 made of concrete, as shown in FIG. In each opening 31, a support pipe 34 forming an opening is disposed. The lower part of each support pipe is shown with three support pads or blocks 35 made of low friction material for the slidable support of the pipe 4. The support block is arranged in the block guide 36. Two or more support blocks may be used.

FIG. 14 shows a perspective view similar to FIG. 12, wherein the support blocks in each opening are replaced with a single low friction sliding element 37 of the lower part of the support pipe 34.

The support pipe with the accompanying sliding component may extend to extend outward of the support bulkhead 30 at each side. At the end of the extended support pipe opposite the stern of the ship, the support pipe may be formed with a conical introduction portion to facilitate the introduction of the pressure gas pipe when installing the pressure gas pipe in the storage assembly.

FIG. 15 shows a perspective view of a segment of the support structure 40 in the form of a solid that substantially fills the intermediate space between the pipes in the assembly and provides a continuum support of the pipe along its entire length.

The support structure 40 consists of a mass 41 comprising parallel passages or holes 42 extending longitudinally for receiving and supporting individual pipes 4. Each hole is supported by a thin-walled lining pipe 43 that is secured to a mass enclosing over its entire length and has an inner diameter that is slightly larger than the outer diameter of the pipe 4, so that the pipe 4 is lined with a lining pipe. It is freely slidable within 43 and may be expanded radially when pressure and temperature changes occur. The lining pipe may be made of a thin walled steel pipe, a composite material or another material, in which the lower part of the interior of the pipe may be provided with a suitable low friction coating.

Also in this embodiment, the pipe receiving holes 42 are shown to be arranged in a hexagonal pattern for strong packing of the pressure gas pipe.

The compact mass 41 in the support structure is preferably made of non-combustible earth (lipid material), such as a suitable concrete material, preferably lightweight concrete. The mass can be cast in situ or it is possible to receive the pressure gas pipe in an assembled state. It can be formed from prefabricated elements (preferably made of lightweight concrete) that are shaped to form the subject passage / hole for the purpose.

Examples of such prefabricated elements are shown in FIGS. 16-18. Thus, FIGS. 16A-B show two components 44, 45, both of which have approximately triangular cross-sections, where component 44 of FIG. 16A is shown. ) Has one planar side and two curved sides while component 45 in FIG. 16B has three curved sides. A number of these elements can be assembled in the unit 46 to provide a longitudinally extending passageway for receiving the pipes, as shown in FIG. 17. The unit 46 has a curved side for the formation of additional pipe receiving passages / holes when assembled with similar elements. As shown, components 44 and 45 may have longitudinal holes 47 for weight reduction or for mounting of service equipment (eg cooling elements or leak detectors).

17 shows the coupling elements 48, 49 for interconnecting the ends of adjacent units 46 to dry the support structure having a length corresponding to the length of the current storage assembly. Alternatively, the units can be secured to each other by gluing or other form of mechanical coupling.

18A shows another embodiment of a prefabricated component 50 that is substantially Y-shaped in cross section. As shown in FIG. 18B, these two components can be assembled with the two components 44 according to FIG. 16A to form a unit 51 corresponding to the unit 46 in FIG. 17. .

These prefabricated components also have other cross-sectional shapes, such as double triangular shapes, Z shapes, and the like.

In the above embodiment the pressure gas pipe is continuously supported by a thin walled lining pipe surrounded by a matrix such as lightweight concrete and has several essential advantages which will be described below.

Compact mass surrounding the lining pipe in the storage assembly is used to meet the fire integrity required to protect cargo, ie compressed gas in the pipe, against external fires.

Only a slight gap between the lining pipe and the pressure gas pipe needs to be filled with inert gas.

Since all the pipes are included in the lining pipe which can be closed at both ends, it is possible to simply and continuously monitor the leakage from the individual pipes by using gas or pressure sensors.

If larger cracks occur in the pressure pipe, the gas flow will hit the lining pipe wall, and the gas flow is guided through the blowout opening at the rear end of the lining pipe.

The mass between the lining pipes has a good energy absorption capacity, which is to protect the pressure pipes in the event of collisions or explosions.

All local, static and dynamic stresses from the support are substantially assessed. As a result of the sliding support, the bending stress caused by the overall bending of the ship's hull is lowered.

The rigidity and strength of the steel lining pipe and the storage assembly constituting the concrete are integrated in the hull, so that the steel weight of the hull can be reduced.

19 to 23 are detailed views of the manifold system 6 aligned to the front end of the storage assembly 3, as described above with respect to FIGS. 1 to 4.

Indeed, the manifold system comprises at least one closed manifold space, at the rear end, which is formed by an end wall to which the adjacent end of the pressure pipe is releasably attached. In the embodiment shown in FIGS. 19 and 20, the starting point is taken in a storage assembly comprising five levels of pressure pipe 4, where the pipes are also arranged in a hexagonal pattern as shown in FIG. 20. . In a partial perspective cross-sectional view of FIG. 19, three closed manifold spaces 55 (front walls are omitted in the drawing) are shown, each of which is a vertically extending pipe-shaped container forming a group of manifolds ( And a group of pipes 4 located above each other are connected to the accessory group manifold 56 via a pipe length 57 fitted with a valve. This manifold container is held in place by a support bracket 58 fixed to the wall of the manifold space, in other words placed on the support structure 70.

As shown, each pipe 4 has an internal drain pipe 59 at its front end and in the pipe length 57 described above connected to the group manifold 56 via a ball valve 60. Pass through. The drain pipe may empty liquid (concentrated gas) collected from the pipe, and a suitable front trim of the vessel is provided in connection with the drainage operation, so that the liquid is collected at the front end of the pressure pipe.

A drain pipe 61 is provided for emptying the liquid collected at the lower end of the manifold container 56.

The upper end of each manifold container 56 is further provided with an outlet pipe 62 shown shown connected to three branch pipes 63, 64, 65 via respective ball valves 66, 67, 68. Typically, two of these pipes are used to fill or empty the pipe 4 in the storage assembly, while the third pipe gives blow group the possibility of blowout.

21 to 23 are enlarged and explained in more detail. With particular reference to FIG. 23, the illustrated pressure pipe 4 is releasably attached to the rear wall 69 of the local manifold space by means of a plurality of screw bolts 71, which screw bolts connect the wall 69. Supported and screwed to an adjacent, hemispherical part of the pipe 4. The drain pipe 59 is shown to be secured to the pipe by a plurality of screw bolts 72, which are supported through a ring flange on the drain pipe and screwed to the end of the pipe 4.

24 to 26 show an advantageous method for installing a pipe on a floating structure with a storage assembly constructed as described above, wherein the floating structure is a vessel here.

FIG. 24 is provided with individual pipes of considerable length in the production plant in the form of a vessel 75 in which the pipes are laid, from which they are guided by water surrounding the vessel 76 and float directly to the storage assembly in the vessel, the vessel Is shown ballasted to a predetermined draft so that a significant amount of pipe can be directly floated to a gathered position in the storage assembly. For example, pipes are provided by continuously welding together lengths of pipes suitable for ships on which the pipes, which can be flat bottoms, are placed. However, pipes can also be provided in considerable length in land-based plants and can be transported in front of the ship.

25 shows a method that can be used by installing and replacing pipes. The figure shows how each pipe, or cassette of the pipes, can be floated into or out of the storage assembly by a towboad / tug 77, and the vessel 76 can also be balled in this case to some draft. It is last.

In FIG. 26 a pressure pipe 4 is produced for this purpose in a land base plant and is conveyed directly to the storage assembly 3 by a mounting device. The mounting apparatus comprises a mounting table 78 on which a pressure pipe 4 is arranged at the stern extension of the vessel 1. The mounting table 78 has at least a length corresponding to the length of the pressure pipe, and according to the total length of the roller or sliding surface 79 is installed, the pressure pipe guides into the storage assembly 3 in the axial direction. Can be. The mounting table 78 further comprises a hydraulic or mechanical device 80 such that the longitudinal axis of the pressure pipe 4, which is guided to the lead-in channel 81 in the storage assembly 3, is piped. Exactly corresponds to the position axis of the storage assembly being guided. The device is further shown with a suitable transfer component or bridge 82 lying between the mounting table 78 and the assembled position in the storage assembly. In the figure it is shown that can be adjusted to the member number 83. Moreover, the figure shows a suitable wharf arrangement 84 and a prestressed or rigid mooring arrangement 85 that allows for changes in tides and movement of the vessel 1 according to the ballast of the vessel.

Claims (26)

The assembly 3 comprises a plurality of separate, parallelly laid pipes 4, which are compressed by a floating structure 1; 10, supported by a support structure 5: 40 and closed at both ends. A system comprising an assembly for storing or transporting a gas, the system comprising: The pipe 4 is releasably attached to only one end of the support structure 5; 40, at which end the pipe is connected to a manifold system 6 for filling or emptying the pipe, 5; 40 are arranged so that the pipe 4 in the assembly 3 is guided in a longitudinally unobstructed manner such that each or group of pipes is positioned opposite one end from its operating position of the assembly 3. A system comprising an assembly for storing or conveying compressed gas in a floating structure (1; 10), characterized in that it is guided or removed through an opening at the end of the assembly. 2. The support structure (40) according to claim 1, wherein the support structure (40) is solid and substantially fills the intermediate space between the pipes (4) in the assembly, the pipes being disposed in individual holes (42) in the support structure and along their total length. And an assembly for storing or transporting the compressed gas in the floating structure (1; 10), characterized in that it is continuously supported by the support structure (40). 3. The hole 42 in the support structure 40 is covered with a thin-walled lining pipe 43 over its entire length, the pipe being attached to the support structure and having an outer diameter of the pipe 4. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10) characterized by having a slightly larger inner diameter. 4. A system according to claim 2 or 3, wherein the support structure (40) is an incompressible earth soil. The system comprises an assembly for storing or transporting compressed gas in the floating structure (1; 10). 5. The system according to claim 4, wherein the support structure (40) comprises cast lightweight concrete. 5. An assembly for storing or transporting compressed gas in a floating structure (1; 10) according to claim 4, characterized in that the support structure (40) consists of prefabricated lightweight concrete components (44, 45). Including system. The steel frame according to claim 1, wherein the support structure 5 comprises a plurality of racks spaced along the length of the pipe 4 and comprises support components extending horizontally and vertically across the pipe. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10), including a work, wherein they form a cell for receiving and supporting each pipe (4). 2. The support structure according to claim 1, wherein the support structure comprises a plurality of bulkheads (30) spaced along and extending across the length of the pipe (4), said bulkhead receiving individual pipes (4). And an assembly for storing or transporting the compressed gas in a floating structure (1; 10), characterized in that it has an opening (31) for supporting and supporting it. 10. The gas compressed in the floating structure (1; 10) according to claim 8, wherein each bulkhead (30) consists of a sandwich structure consisting of a perforated steel plate (32) with intermediate concrete (33). A system comprising an assembly for storing or transporting. 10. The pipe according to claim 7, wherein each pipe 4 in the assembled state is surrounded by a thin-walled lining pipe 43 of inner diameter slightly larger than the outer diameter of the pipe 4. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10) characterized by the above-mentioned. 11. A pipe group of the same horizontal level in the support structure (5) is arranged in each cassette (24) releasably mounted in the storage assembly (3). And an assembly for storing or transporting the compressed gas in the floating structure (1; 10). 12. The support structure (40) according to any one of the preceding claims, wherein the support structure (40) forms a structurally rigid block disposed in a deck on the floating structure (1; 10), which constitutes a joining portion of the floating structure and the total thereof. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10) characterized by contributing to stiffness and strength. 13. The ship structure according to claim 12, wherein the floating structure is a long hull type 1 of a single hull type, wherein the storage assembly 3 is arranged in the deck 2 of the ship between the side wall formations 9 of the hull 8, The pipe 4 in the block extends parallel to the longitudinal axis of the ship 1 from the front part of the ship to the rear end for storing or transporting the compressed gas in the floating structure 1; 10. A system comprising an assembly. 13. The floating structure according to claim 12, wherein the floating structure is an elongate multi hull vessel (10), wherein the storage assembly (3) is arranged on a common deck (11) between the side wall formations (13) of the hull (12) and in the block. The pipe 4 is provided with an assembly for storing or transporting compressed gas in the floating structure 1; 10, which extends parallel to the longitudinal axis of the ship 10 from the front to the rear end of the ship. Including system. 15. The method according to claim 13 or 14, wherein at least the side wall formations (9; 13) of the hull comprise ballast tanks (15; 22) capable of sinking the vessel (1; 10) into water. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10), characterized in that at the level the pipe (4) is made to float to mount or not to mount the pipe. The rear end wall 69 according to claim 13, wherein the manifold system 6 is located at the front end of the vessel 1; 10 and the adjacent end of the pipe 4 is releasably attached. And an assembly for storing or transporting the compressed gas in the floating structure (1; 10), characterized in that it is disposed in at least one closed manifold space (55). 17. The vertical group of pipes (4) is connected to the fitting and the vertically extending group of manifolds (56) is provided with blowouts (62) which are possible in the periphery in the upward direction. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10). 18. The gas compressed in the floating structure (1; 10) according to any one of claims 13 to 17, characterized in that the pipe (4) has at least one end a safety valve for emergency blowout and a pipe arrangement. A system comprising an assembly for storing or transporting. 19. The storage assembly (3) according to any one of claims 13 to 18, characterized in that the storage assembly (3) is made in a closed space (25) which is thermally insulated from the periphery and has a device for cooling the interior of the space. A system comprising an assembly for storing or transporting compressed gas in a floating structure (1; 10). 20. The floating space according to claim 19, characterized in that the closed space (25) at the rear end of the pipe (4) has a gate device which can be opened upon installation and / or replacement of each of the pipes (4) or a group of pipes. A system comprising an assembly for storing or transporting compressed gas in a structure (1; 10). 21. The pipe 4 according to claim 16, wherein at the front end of the pipe 4 the pipe 4 has an internal drain pipe 59 which flows out of the manifold space 55. And an assembly for storing or conveying the compressed gas in the floating structure (1; 10), characterized in that it is arranged for emptying the liquid that can be collected from the pipe (4) in combination with a suitable front trim of the. In a method for installing a pipe in a floating structure having a storage assembly according to claim 1, wherein the pipe 4 has approximately neutral buoyancy in water, Individual pipes 4 are provided with corresponding lengths in the production plant 75, guided from there into the water surrounding the floating structure 76 and floated into the storage assembly so that the floating structure is ballasted to a predetermined draft A method for installing a pipe in a floating structure with a storage assembly according to claim 1, characterized in that the pipe floats directly to the collected position in the storage assembly 3. 23. The installation of a pipe in a floating structure with a storage assembly according to claim 1, characterized in that the pipes 4 are provided together in series in a pipe length suitable for the vessel 75 on which the pipe is placed. Way. Storage according to claim 22 or 23, characterized in that a plurality of pipes (4) are arranged in the cassette (24) floating in place at a predetermined level in the storage assembly (3). A method for installing pipes in a floating structure having an assembly. 23. The apparatus of claim 22, wherein when replacing the pipes in the storage assembly, the floating structure 76 is ballasted to a predetermined draft and the corresponding pipes are pulled out of the storage assembly by the tugboat device. A method for installing pipes in a floating structure having a storage assembly according to the invention. A method for installing a pipe in a floating structure with a storage assembly according to claim 1, The pipes 4 are transported one by one on a mounting table 78 located in the ground storage plant and adjusted in the vertical and horizontal directions so that the mounting table with the pipes has a corresponding lead-in channel 81 in the storage assembly 3. A pipe in a floating structure with a storage assembly according to claim 1, characterized in that it is located in a precisely assembled linear position with respect to it, and then the pipe 4 is pushed into or pulled into the storage assembly and proceeds to its mounting position in the assembly. How to install it.

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