JP2010169185A - Vacuum heat insulation pipe for low-temperature liquefied gas - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multiple vacuum heat insulation pipe, capable of restraining evaporated gas from being generated in a transfer pipe, when replenishing low temperature liquefied gas such as liquid hydrogen to a storage tank or the like, via the transfer pipe, and capable of attaining a high transfer efficiency. <P>SOLUTION: This multiple vacuum heat insulation pipe for passing the liquefied gas restrains a heat input from an outside, by providing a vacuum space 23 in an inside of the outermost layer tube 7, and restrains the liquefied gas from being evaporated in a liquid passing initial period, since the innermost layer tube 1 is formed of a fiber reinforced resin to reduce a heat capacity. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vacuum heat insulation pipe used for transporting a low-temperature liquefied gas, and more particularly to a vacuum heat insulation pipe used as a transfer pipe connecting a supply pipe for a liquefied gas.

Since hydrogen gas produces only water by combustion, it attracts attention as a fuel that is harmless to the environment. In the future, in order to realize the widespread use of hydrogen vehicles and use as household fuel, it is necessary to develop facilities that support economic infrastructure such as hydrogen stations, as well as development of utilization technologies.
FIG. 7 is a block diagram illustrating an example of a hydrogen supply system.
In order to utilize low-temperature liquefied gas such as hydrogen and natural gas as automobile fuel, it is necessary to provide convenience by providing a supply station for each region of an appropriate size. In order to supply the liquefied gas to the liquefied gas stations distributed in various places, it is unreasonable to construct a system in which a pipeline is directly connected from the liquefied gas production base to the stations in the various places.

On the other hand, it is rational that each supply station has a liquefied gas storage tank and is distributed from a liquefied gas production plant to a storage tank such as a liquefied gas station by a liquefied gas container car or a tank lorry as appropriate. In addition, in order to cover the fuel demand of households etc. with hydrogen, a storage tank is provided in each appropriately segmented area and connected with each household by a hydrogen pipeline, and liquid hydrogen gas is stored in the storage tank, A system that supplies gas to each household using a hydrogen pipeline while gasifying with an evaporator is conceivable.
In a system using a storage tank, when the liquefied gas in the storage tank is insufficient, the liquefied gas is supplied to the storage tank by connecting the supply pipe of the liquefied gas container vehicle or the tank truck to the transfer pipe of the storage tank.

The conventional liquefied gas transfer pipe has a structure restriction for ensuring safety, and the material of the inner pipe that requires pressure resistance performance by touching the liquefied gas is SUS304L, SUS316L or aluminum alloy of stainless steel for liquid hydrogen. limited.
FIG. 8 is a conceptual cross-sectional view showing the structure of a standard transfer pipe. A double structure is formed with a stainless steel inner tube that touches the liquid hydrogen flow and a stainless steel outer tube that touches the outside air, and a support made of heat insulating material is provided at an appropriate interval between the inner tube and the outer tube. The space is kept in a vacuum and is insulated by vacuum so that external heat input is not transferred to liquid hydrogen. The support reduces the contact area with the inner tube and suppresses heat transfer from the outer tube to the inner tube through the support.

When supplying the liquefied gas from the liquefied gas container vehicle to the storage tank, the supply pipe is connected to the transfer pipe and the liquefied gas is sent into the storage tank. However, since the transfer pipe is at a higher temperature than the liquefied gas temperature, the liquefied gas evaporates in the transfer pipe to become a gas until it is cooled to the liquefied gas and the temperature of the transfer pipe drops to the liquefied gas temperature. The gas cannot be transferred effectively.
For this reason, a bypass line is connected via a valve to the root of the transfer pipe to the storage tank, and the evaporative gas generated until it is sufficiently cooled is removed from the liquefied gas container or the evaporative gas treatment device of the storage tank. Through the atmosphere.

  Since the liquefied gas consumed for cooling the transfer pipe reduces the transfer efficiency (filling amount of tank / liquefied gas transfer amount), it is required to reduce this. Such a liquefied gas amount is, for example, when transferring in a short time of about 2 hours, for example, the heat input from the outside of the pipe is relatively small, the heat capacity of the transfer pipe, that is, the specific heat, weight and temperature difference of the pipe. Depends mainly on the product of

  Such waste of liquefied gas is not a problem in pipelines where liquefied gas is constantly flowing, but is a problem when pipes are used intermittently as in storage tanks such as hydrogen stations. . Moreover, since the performance required for piping is different between piping that is always circulated and piping that is used intermittently, there is room for reviewing design conditions that have been applied in the past.

FIG. 9 is a graph showing a trial calculation result regarding the amount of heat applied when the transfer pipe from the liquid hydrogen container to the liquid hydrogen storage tank is cooled. Assuming that the inner diameter of the transfer pipe is 28 mm, the length is 20 m, the thickness is 3 mm, the amount of liquid hydrogen to be transferred is 10 m ³ , and the temperature of the pipe is changed from 300K to 20K, the external heat input is 0.5 W / m and 1 W / thermal load when the m, also the heat capacity when the pipe is made of glass fiber reinforced resin density 8900kg / ^{m 3} stainless steel and density 1900 kg / ^{m 3,} the filling time (4 hours 0.5 hours) Is plotted against.

According to the trial calculation results, it can be seen that the heat capacity of the stainless steel pipe is about 5900 kJ, whereas the heat capacity of the resin pipe is about 2800 kJ, which is overwhelmingly smaller. The external heat input increases as the filling time increases, but the influence is small compared to the heat capacity of the pipe, and it is found that the effect is extremely small compared to the heat capacity of the pipe, particularly in the case of short time filling. The heat capacity of the pipe does not change depending on the filling time.
Therefore, if the inner pipe of the transfer pipe is made of resin, the amount of evaporative gas generated when the transfer pipe is cooled can be suppressed.

In particular, since liquid hydrogen and gaseous hydrogen have high permeability, ordinary synthetic resins have insufficient denseness and may leak. For this, there is a method of preventing leakage by stretching an aluminum foil on the surface of a synthetic resin or by sandwiching it in the resin.
In addition, there are some fields where the application of resin piping to low-temperature liquefied gas is not officially approved at present.

  In the specification of Japanese Patent Application No. 2007-179882 filed earlier, the applicant of the present application provides a liquid hydrogen storage tank having a double shell structure having a vacuum layer, and one or both of the inner and outer tanks are provided with a barrier that prevents gas permeation. A technique of forming a fiber-reinforced plastic material having a material is disclosed. Since the fiber reinforced plastic material contains micro voids and micro cracks inside the material, permeation of vaporized gas cannot be prevented. For this reason, an aluminum foil or a stainless steel foil is used as a barrier material to provide a material having sufficient mechanical strength and gas permeation prevention performance.

  Moreover, the fiber reinforced resin which suppressed hydrogen permeation | transmission can also be obtained by using the adhesion clay film disclosed by patent document 1 as a barrier material. The adhesive clay film disclosed in Patent Document 1 is a gas barrier layer formed by densely laminating clay minerals having a plate-like crystal structure oriented in one direction. This gas barrier layer can be formed on the surface or inside of the fiber reinforced resin. The fiber reinforced resin having the hydrogen gas barrier layer is used as a material for a hydrogen tank or a container of a hydrogen storage facility.

Although not directly related to the present invention, Patent Document 2 discloses a joint structure for a vacuum adiabatic double pipe used as a fluid transport pipe for high-temperature gas or low-temperature gas. In conventional flange-type butt joints, heat is transmitted through the flange, so heat insulation performance cannot be secured. However, the vacuum heat insulation type double pipe disclosed in Patent Document 2 surrounds the butt weld of the inner pipe with a vacuum chamber. It is configured to enhance the heat insulation effect.
JP 2006-188645 A No. 7-40791

  Therefore, the problem to be solved by the present invention is to suppress the generation of evaporative gas in the transfer pipe and realize high transfer efficiency when the storage tank or the like is supplemented with low-temperature liquefied gas such as liquid hydrogen via the transfer pipe. It is to provide multiple vacuum insulation piping.

  In order to solve the above-mentioned problems, the liquefied gas vacuum heat insulation pipe of the present invention is a multiple vacuum heat insulation pipe for flowing a liquefied gas, and is provided with a vacuum space inside the outermost pipe, and heat input from the outside. And the innermost layer tube is a fiber reinforced resin tube having a smaller heat capacity than the metal tube, and suppresses evaporation of the liquefied gas at the initial stage of liquid passage.

  In addition, the liquefied gas vacuum insulation pipe of the present invention has a fiber reinforced resin pipe in which the innermost layer is formed of a stainless steel pipe in the connection part with other pipes, and the innermost layer is a fiber reinforced resin pipe in the other parts. In this part, a stainless steel pipe joined to the innermost layer stainless steel pipe is provided immediately outside, and the stainless steel pipe supports the leakage of liquefied gas and supports the fiber reinforced resin pipe not to be greatly deformed. You may do.

  The liquefied gas vacuum insulation pipe of the present invention has a small heat capacity of the tube because the innermost layer tube in contact with the liquefied gas is formed of fiber reinforced resin, and suppresses external heat input by providing a vacuum space inside the outermost layer tube. Therefore, the amount of heat that the liquefied gas must remove from the heat in order to cool the piping at the beginning of the liquid flow to the liquefied gas temperature is small, and evaporation of the liquefied gas can be suppressed.

  In addition, in the case where a stainless steel pipe joined to the innermost layer stainless steel pipe is provided just outside the fiber reinforced resin pipe portion, the inner pipe in contact with the liquefied gas is a fiber reinforced resin pipe having a small heat capacity. In addition to suppressing evaporation, the stainless steel pipe prevents leakage of liquefied gas, so that safety as a transfer pipe can be secured, and the stainless steel pipe is also used when the fiber reinforced resin pipe is deformed by fluid pressure. It becomes possible to prevent the fiber-reinforced resin tube from being greatly deformed by being supported.

  The liquefied gas vacuum insulation pipe of the present invention is an evaporation that occurs while the transfer pipe cools to the liquefied gas temperature when the low temperature liquefied gas storage tank or the like such as liquid hydrogen is supplemented via the transfer pipe. The amount of gas can be suppressed and high transfer efficiency of liquefied gas can be realized.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same constituent elements are denoted by the same reference numerals, and the description thereof is omitted.
FIG. 1 is a cross-sectional view showing the main part of the liquefied gas vacuum heat insulation pipe of this embodiment.

  The liquefied gas vacuum heat insulation pipe of this embodiment is arranged outside the inner pipe 3 made of stainless steel at the end of the pipe, the inner pipe 1 made of fiber reinforced resin and the inner pipe 1 made of fiber reinforced resin in the inner part of the pipe. A stainless steel middle pipe 5 and an outermost stainless steel outer pipe 7 are used as main elements to transfer liquid hydrogen LH2 from a container car or a tank truck to a storage tank.

  In this embodiment, it is preferable to use, for example, a carbon fiber reinforced resin or a glass fiber reinforced resin of an epoxy resin as the fiber reinforced resin of the inner tube 1. Moreover, since it contacts directly with hydrogen, it is preferable to provide a barrier material on the surface or inside of the fiber reinforced resin constituting the inner tube 1 so that hydrogen does not leak.

  By using an aluminum foil or a stainless steel foil as a barrier material, it is possible to impart permeation prevention performance to the fiber reinforced resin. Also, an adhesive clay film formed by densely laminating clay minerals having a plate-like crystal structure disclosed in Patent Document 1 in one direction is formed on the surface or inside of a fiber reinforced resin. Thus, leakage of hydrogen can be blocked.

  Further, since the inner tube 3 and the inner tube 5 may come into contact with the liquefied gas, the stainless steel of the inner tube 3 and the inner tube 5 is considered to be resistant to low temperature brittleness when applied to, for example, liquid hydrogen, It is preferable to use SUS314L and SUS316L.

  The liquefied gas vacuum heat insulation pipe of this embodiment is triple with the inner pipe 1, the middle pipe 5 and the outer pipe 7 except for the end portion, and a space formed between the outer pipe 7 and the middle pipe 5 is the first. A vacuum heat insulating layer 23, a space formed between the middle tube 5 and the inner tube 1 is a pipe that forms the second vacuum heat insulating layer 25. For example, as an ordinary vacuum heat insulating pipe, the outer diameter of the inner pipes 1 and 3 can be 27.2 mm, the outer diameter of the middle pipe 5 can be 42.7 mm, and the outer diameter of the outer pipe 7 can be 89.1 mm.

  At the end of the liquefied gas vacuum insulation pipe, there is a male die 17 of a bayonet fitting that matches the female die 27 of the bayonet fitting provided at the tip of a supply pipe for supplying liquid hydrogen (LH2) from a container car or a tank truck. Is formed.

The inner pipe 3 in contact with the liquid hydrogen at the end of the pipe is made of stainless steel in order to form a bayonet joint compactly. However, the inner pipe 1 that is joined to the inner pipe 3 at the pipe end portion by the dissimilar joint 9 inside the pipe and occupies most of the pipe is made of fiber reinforced resin in order to reduce the heat capacity.
The end of the middle pipe 5 is joined to the inner pipe 3 at the pipe end via a flange 15.

FIG. 2 is a cross-sectional view showing a portion of the dissimilar joint.
The dissimilar joint 9 joins dissimilar pipes of the stainless steel inner pipe 3 and the fiber reinforced resin inner pipe 1 through a stainless steel joint part 29. The joint component 29 and the stainless steel inner pipe 3 are joined by welding, and the fiber reinforced resin inner pipe 1 is joined by screws 31. An adhesive is applied to the threaded portion to strengthen the connection. The screw 31 is preferably a taper screw.

  Further, the male / female of the taper screw 31 is determined by the contracted state when it is lowered to the temperature of the liquefied gas. Stainless steel shrinks about 0.27% when cooled from room temperature to the boiling point of hydrogen, 20K, so it is an epoxy resin-based glass fiber reinforced resin that shrinks about 0.4% at the same temperature change. In some cases, it is preferable that the joint component 29 joined to the stainless steel inner pipe 3 is a male and the fiber reinforced resin inner pipe 1 is a female. By selecting the male / female of the taper screw 31 in this manner, the taper screw 31 is tightened more strongly because the female side tends to contract from the male side when cooled.

FIG. 3 is a cross-sectional view showing a dissimilar joint having a male / female relationship different from that in FIG.
Since the epoxy resin-based carbon fiber reinforced resin expands by about 0.4% when cooled from room temperature to 20K, conversely, in the case of glass fiber, the joint component 29 'is a female and the fiber reinforced resin inner tube 1 is expanded. By reversing the direction of the taper screw 31 'with' as a male, it is strongly tightened during cooling.

FIG. 4 is a drawing showing a cross section of an inner tube in which thermal deformation is reduced using a composite material.
A glass fiber reinforced resin (GFRP) 33 having a property of shrinking at a low temperature on the outer side of the inner tube 1 and a carbon fiber reinforced resin (CFRP) 35 having a property of expanding at a low temperature on the inside have a composite structure. Distortion can be reduced. When cooled from room temperature to 20K, the carbon fiber reinforced resin expands by 0.4% and the glass fiber reinforced resin contracts by 0.4%, so that the composite hardly deforms even when it comes into contact with liquid hydrogen.

In addition, since this composite material does not shear and break, it is necessary to reinforce the joint surface between the inner surface of the carbon fiber reinforced resin and the outer surface of the glass fiber reinforced resin with a resin or the like. Further, at the production stage of the composite material, carbon fibers and glass fibers may be overlapped and impregnated with an epoxy resin to be solidified.
Since stainless steel shrinks by about 0.27% at the same temperature change from room temperature to 20K, the taper screw of the dissimilar joint 9 is in a low temperature state by screwing the composite material as a male and the stainless steel part as a female. It will tighten well.

Returning to FIG. 1 again, the support 11 is formed of a heat insulating synthetic resin and is provided at an appropriate interval between the middle tube 5 and the inner tube 1. 2 It has the function of ensuring the space of the heat insulation layer 25.
The space of the second heat insulating layer 25 can block heat input from the outside by being vacuumed to be in a vacuum state. In addition, by inserting the activated carbon sheet 10 into the space, the adsorption function of the activated carbon sheet 10 can be utilized instead of vacuum suction or in combination with vacuum suction. The activated carbon sheet 10 has an extremely high adsorption capacity and adsorbs and fixes the residual molecules in the space, so that the degree of vacuum in the second heat insulation layer 25 is improved and the heat insulation function is improved.

FIG. 5 is a conceptual diagram illustrating the relationship between the middle tube 5 and the inner tube 1.
When the liquefied gas or vaporized gas inside the inner tube 1 exerts an excessive pressure, the inner tube 1 made of synthetic resin loses the pressure and moves outward with the support 11 as a fulcrum as shown by a dotted line in FIG. Even if it bends, it does not lead to an accident in which the inner tube 1 leaks against the stainless steel middle tube 5 and the inner fluid leaks or the tube is damaged.
In addition, the liquefied gas vacuum insulation pipe of the present embodiment is configured so that the stainless steel middle pipe 5 surrounds the flow path of the liquefied gas over the entire portion of the inner pipe 1 made of synthetic resin. The same safety as that of the liquefied gas vacuum insulation pipe whose inner pipe is made of stainless steel can be ensured.

The middle tube 5 is provided with a bellows 13 for relaxing thermal stress at an appropriate position.
Since stainless steel and fiber reinforced resin have different coefficients of thermal expansion, a large thermal stress is generated between the inner tube 1 fixed at both ends of the middle tube 5 and it is necessary to absorb this thermal stress. is there. The bellows 13 can effectively absorb the stress generated between the middle tube 5 and the inner tube 1.

  A space formed between the outer tube 7 and the middle tube 5 or the inner tube 3 is vacuum-sucked to form a first heat insulating layer 23 that blocks external heat input. In combination with vacuum suction, the activated carbon sheet 21 is inserted into the space, the extremely high adsorption function of the activated carbon sheet 21 is utilized, the degree of vacuum of the first heat insulating layer 23 is increased, and the heat insulating function is improved. Can be made.

  The liquefied gas vacuum insulation pipe of this embodiment is installed in the storage tank, and when the liquid hydrogen in the storage tank is insufficient, the bayonet joint 27 at the tip of the supply pipe of the liquefied gas container vehicle and the vacuum insulation pipe on the storage tank side. The bayonet joint 17 at the tip is joined, the valve of the bypass line is opened, and liquid hydrogen is supplied.

At first, since the temperature of the vacuum heat insulation pipe is high, the liquid hydrogen evaporates in the vacuum heat insulation pipe to become hydrogen gas, and is diffused to the atmosphere through the bypass line.
Eventually, when the vacuum insulation pipe is sufficiently cooled by liquid hydrogen and approaches the boiling point (20K) of liquid hydrogen, the valve connected to the bypass line is shut off, and then the entire amount of liquid hydrogen is transferred to the storage tank.

The liquid hydrogen gasified during this cooling period is a component that cannot be recovered and reduces the transfer efficiency.
In the liquefied gas vacuum heat insulation pipe of this embodiment, since the inner pipe 1 to be cooled is formed of fiber reinforced resin, the heat capacity is small and the amount of evaporative gas required for cooling is small compared to the stainless steel pipe. For example, when a stainless steel pipe having a length of 20 m and a heat capacity of about 5900 kJ, the heat capacity of the resin pipe is about 2800 kJ, and the hydrogen gas to be evaporated is ½ or less compared to the case of the stainless steel pipe.

  Thus, in the liquefied gas vacuum insulation pipe of this embodiment, since the inner pipe is made of resin and the middle pipe is made of stainless steel, the evaporation gas generated to cool the pipe in the initial stage of liquefied gas supply The amount can be suppressed, and safety equivalent to that of the liquefied gas vacuum heat insulating pipe provided with the stainless steel inner pipe can be ensured.

  FIG. 6: is sectional drawing which shows the principal part of the liquefied gas vacuum heat insulation piping which concerns on the 2nd Embodiment of this invention. The liquefied gas vacuum insulation pipe of this embodiment is used for a transfer pipe used when receiving a liquefied gas in a storage tank. In piping which uses such a way, it is necessary to cool from room temperature to the boiling point of the liquefied gas every time it is used, and the liquefied gas is wasted.

The liquefied gas vacuum heat insulation pipe of this embodiment is a double pipe, and an inner pipe integrated with a bayonet joint male part 17 adapted to a female part 27 of a bayonet joint provided at the tip of a supply pipe of a container car. The portion 37 is made of stainless steel, but the portion of the inner pipe 1 joined by the inner pipe 37 and the dissimilar joint 9 employs a fiber reinforced resin pipe with a gas barrier in order to reduce the heat capacity. As the outer tube 39, a stainless steel tube or a fiber reinforced resin tube is used.
A support 11 is provided between the inner tube 1 and the outer tube 39 to secure a space, and this space is vacuum-sucked to form a vacuum heat insulating layer 41. The activated carbon sheet 19 is inserted into the vacuum heat insulating layer 41 to increase the degree of vacuum and improve the heat insulating effect.

  The pressure resistance of the fiber reinforced resin at cryogenic temperature is sufficient for handling liquid hydrogen, and since the leakage of hydrogen can be prevented by providing a gas barrier, the liquefied gas vacuum insulation pipe of this embodiment is used only when liquid hydrogen is supplemented. It can be applied to the piping used.

  INDUSTRIAL APPLICABILITY The present invention can be used for a transfer pipe used for liquefied gas supplementation of a storage tank in a liquefied gas supply station such as liquid hydrogen.

It is sectional drawing which shows the principal part of the liquefied gas vacuum heat insulation piping which concerns on the 1st Embodiment of this invention. It is sectional drawing which shows the part of the dissimilar joint in 1st Embodiment. It is sectional drawing which shows the part about the other example of the dissimilar coupling of 1st Embodiment. It is sectional drawing which shows another example of the inner tube | pipe of 1st Embodiment. It is a conceptual diagram explaining the effect | action of this invention. It is sectional drawing which shows the principal part of the liquefied gas vacuum heat insulation piping which concerns on the 2nd Embodiment of this invention. It is a block diagram which shows the filling system of liquid hydrogen. It is a conceptual diagram which shows the structure of the conventional transfer piping. It is a graph which shows the trial calculation result regarding the heat capacity in a transfer piping, and external heat input.

1 Inner pipe (FRP)
3 Inner tube (stainless steel)
5 Middle pipe 7 Outer pipe 9 Dissimilar joint 11 Support 13 Bellows 15 Flange 17 Bionette joint (male)
19, 21 Activated carbon sheet 23 1st heat insulation layer 25 2nd heat insulation layer 27 Bionette joint (female)
29 Joint parts 31 Adhesive material 33 Glass fiber reinforced resin part 35 Carbon fiber reinforced resin part 37 Inner pipe 39 Outer pipe 41 Heat insulation layer

Claims (11)

  A multiple vacuum insulation pipe that intermittently flows liquefied gas, and has a vacuum space inside the outermost layer pipe to suppress heat input from the outside, and the innermost layer pipe is a fiber reinforced resin pipe at the beginning of liquid flow A liquefied gas vacuum insulation pipe characterized by suppressing evaporation of the liquefied gas.   In the multiple vacuum heat insulating pipe, the innermost layer is formed of a first stainless steel pipe at a connection portion with another pipe, and the innermost layer is a fiber reinforced resin pipe other than the connection portion, and the fiber reinforced resin pipe A second stainless steel pipe is provided immediately outside the second stainless steel pipe, and the second stainless steel pipe is joined to the first stainless steel pipe, and the second stainless steel pipe prevents leakage of the liquefied gas and The liquefied gas vacuum heat insulating pipe according to claim 1, wherein the fiber reinforced resin pipe is supported.   The liquefied gas vacuum insulation pipe according to claim 2, wherein the second stainless steel pipe provided just outside the fiber reinforced resin pipe includes a bellows for relaxing thermal stress.   4. The liquefied gas vacuum insulation pipe according to claim 2, wherein the first stainless steel pipe and the innermost fiber reinforced resin pipe are joined by taper screw joining via an adhesive. 5.   In the taper screw joining, when the shrinkage amount of the fiber reinforced resin tube is larger than the shrinkage amount of the first stainless steel tube when the temperature decreases from room temperature to the temperature at which the liquefied gas flows, the first stainless steel tube side is externally threaded. If the fiber reinforced resin tube has a female thread, and the contraction amount of the fiber reinforced resin tube is smaller than the contraction amount of the first stainless steel tube, the first stainless steel tube side is used as a female screw and the fiber reinforced resin tube is a male screw. The liquefied gas vacuum insulation pipe according to claim 4, wherein   The fiber reinforced resin pipe is formed of glass fiber reinforced resin, and the taper screw at the joint between the fiber reinforced resin pipe and the first stainless steel pipe has a female thread as the fiber reinforced resin pipe and a male thread as the first stainless steel pipe. The liquefied gas vacuum insulation pipe according to claim 4, wherein   The fiber reinforced resin pipe is formed of a carbon fiber reinforced resin, and the taper screw at the joint between the fiber reinforced resin pipe and the first stainless steel pipe has a male thread for the fiber reinforced resin pipe and a female thread for the first stainless steel pipe. The liquefied gas vacuum insulation pipe according to claim 4, wherein   The liquefied gas vacuum insulation pipe according to any one of claims 1 to 7, wherein an aluminum foil is attached to an outer periphery of the fiber reinforced resin pipe.   8. The gas barrier material according to claim 1, wherein a gas barrier material in which a clay mineral having a plate-like crystal structure is oriented in one direction and is densely laminated is provided inside or on the surface of the fiber reinforced resin tube. The liquefied gas vacuum heat insulation piping of any one of Claims 1.   The liquefied gas vacuum insulation pipe according to any one of claims 1 to 9, wherein an activated carbon sheet is disposed in an outer space of the innermost layer pipe to secure a vacuum in the space.   5. The tube according to claim 1, wherein the innermost fiber-reinforced resin tube is a tube in which a carbon fiber-reinforced resin is disposed inside and a glass fiber-reinforced resin is disposed outside. Liquefied gas vacuum insulation piping.