KR20120004379A - Apparatus for sticking adhesive to mount secondary barrier of lng storage tank and method of the same - Google Patents

Abstract

PURPOSE: An apparatus for applying adhesives for installing a secondary barrier of an LNG(liquefied natural gas) storage tank and a method thereof are provided to apply effective pressure on an adhesive film by multiple pressing plates despite height difference of an exposed part, recessed or protruded structure, and stepped section of the exposed part. CONSTITUTION: An apparatus(100) for applying adhesives for installing a secondary barrier of an LNG(liquefied natural gas) storage tank comprises a frame(10), a drive unit(20), a heating unit(30), a supply unit(40), and a pressing unit(50). The drive unit is mounted in the frame. A lower heat insulation board, a main secondary barrier, an upper heat insulation board are successively stacked on between an inner hull and a primary barrier of an LNG storage tank. The drive unit transfers the frame corresponding to the exposed part of the main secondary barrier exposed between upper heat insulation boards which are adjacent to each other. The heating unit, the supply unit, and the pressing unit are installed in the frame, respectively. The heating unit heats the exposed part of the main secondary barrier. The supply unit supplies an adhesive film to the heated exposed part. The pressing unit presses the adhesive film and attaches the adhesive film on the exposed part.

Description

Adhesive construction device for secondary barrier installation of LNG storage tank and method thereof {APPARATUS FOR STICKING ADHESIVE TO MOUNT SECONDARY BARRIER OF LNG STORAGE TANK AND METHOD OF THE SAME}

The present invention relates to an adhesive construction device for secondary barrier installation of a liquefied natural gas storage tank for constructing a film adhesive and a method thereof.

In general, liquefied natural gas (LNG) is a colorless transparent liquid state in which a volume of 1/600 is reduced by cooling a natural gas containing methane as a main component at -163 degrees Celsius.

A liquefied natural gas carrier for transporting liquefied natural gas or a floating offshore structure for producing and storing liquefied natural gas includes a storage tank capable of storing liquefied natural gas at cryogenic conditions. LNG storage tanks have an insulating and impermeable structure therein.

For example, a liquefied natural gas storage tank may have a primary barrier in direct contact with the liquefied natural gas stored therein, an upper insulation board for thermally supporting the primary barrier, and a liquid natural gas leaked from the primary barrier. And a lower insulating board for insulating and supporting the secondary barrier.

The lower insulation boards have a unit area and are arranged in the hull inner wall in a plurality, thereby forming a gap between adjacent lower insulation boards. For this reason, the secondary barrier is composed of a primary secondary barrier on the plurality of lower insulating boards and an auxiliary secondary barrier connecting neighboring primary secondary barriers.

The upper insulation board is provided with an area smaller than the area of the lower insulation board in each of the primary secondary barriers to form an exposed portion in the primary secondary barrier. The secondary barrier is completed by applying an adhesive to the exposed portion and attaching the secondary secondary barrier.

To this end, a strip bonding apparatus and a strip bonding method are disclosed in which an adhesive is applied to an exposed portion of a secondary barrier and a strip is pressed by pressing a strip on the adhesive.

An object of the present invention is to simplify the structure, to provide an adhesive construction device for installing the secondary barrier of the LNG storage tank and a construction method using the same.

Adhesive construction apparatus for installing a secondary barrier of a liquefied natural gas storage tank according to an embodiment of the present invention, the frame, the lower portion is mounted to the frame and sequentially stacked between the hull inner wall and the primary barrier of the liquefied natural gas storage tank A drive unit for driving the frame in response to an exposed portion of the main secondary barrier which is exposed between the adjacent upper insulating boards and spaced apart from each other among the insulation board, the main secondary barrier and the upper insulation board; A heating part for heating the exposed part of the car barrier, a supply part mounted on the frame to supply an adhesive film to the heated exposure part, and a press part for pressing and applying the adhesive film mounted on the frame to the exposed part. do.

The heating unit may be disposed at the front in the advancing direction of the frame, and the supply unit may be disposed at the rear of the heating unit in the advancing direction of the frame.

The heating unit may include a plate heater corresponding to the exposed part, and a cylinder connected to the plate heater to extend and contract.

The supply part is inserted into the supply roll wound the adhesive film is installed in the frame bar, a movable member for moving in the radial direction from the mounting bar to press the inner surface of the supply roll, and the movable member in the mounting bar It may include an elastic member for elastically supporting the.

The movable member may be formed in a pair disposed on both sides of the mounting bar in the radial direction.

The supply unit may further include a guide installed below the supply roll to guide the adhesive film from the supply roll to the exposed part.

The pressing unit may include a pressure plate that contacts the adhesive film to press the adhesive film, and a cylinder mounted to the frame to be elastically connected to the pressure plate by a ball joint.

The frame may include first direction members disposed along a travel direction of the frame, second direction members disposed along a second direction crossing the travel direction and connecting the first direction members. The bidirectional member may form a guide groove for guiding the driving part in the second direction.

The driving unit includes a plurality of driving rolls which are driven in close contact with the side surface of the upper insulating board by rolling friction, a motor for driving the driving rolls, a width adjusting unit for moving the driving rolls in the first direction, and the frame. It may be mounted to include a support roll rolling on the upper insulation board.

The width adjusting part may be coupled to the guide groove with a guide protrusion, and disposed in pairs in parallel with the first direction member and moved in the second direction, and screwed to the width adjusting member and opposite directions. The lead screw is formed of a screw, and may include a motor for driving the lead screw.

According to an embodiment of the present invention, a method for installing a secondary barrier adhesive for a liquefied natural gas storage tank includes a lower insulation board and a main secondary barrier sequentially stacked between an inner wall and a primary barrier of a liquefied natural gas storage tank. And a heating step of heating the exposed portions of the main secondary barrier exposed between the upper insulating boards and spaced apart from each other, and supplying an adhesive film composed of an adhesive and a protective film to press and attach the heated portions to the exposed heat. And a removing step of removing the protective film from the adhesive film attached thereto.

The heating step may heat the exposed portion within the melting range of the adhesive attached to the exposed portion.

Thus, according to one embodiment of the present invention, by heating the exposed portion of the primary secondary barrier, supplying an adhesive film composed of an adhesive and a protective film, by pressing the adhesive film to the exposed portion to install the secondary secondary barrier There is an effect of simplifying the configuration of the device for constructing the adhesive for.

1 and 2 is a perspective view of the adhesive construction device for the secondary barrier installation of the LNG storage tank according to an embodiment of the present invention.
Figure 3 is a flow chart of the adhesive construction method for the secondary barrier installation of the liquefied natural gas storage tank according to an embodiment of the present invention.
4 is a plan view of a state in which the adhesive is constructed by the adhesive construction device for secondary barrier installation of the LNG storage tank of FIGS.
5 is a cross-sectional view taken along the line VV of the construction state of FIG. 4.
6 is a right side view of FIG. 1.
7 is a plan view of FIG. 1.
8 is a front view of FIG. 1.
9 is a rear view of FIG. 1.
10 is a perspective view of a supply unit for supplying an adhesive film.
FIG. 11 is a cross-sectional view taken along the line VII-VII of FIG. 10.

Hereinafter, an adhesive construction device for installing a secondary barrier of a liquefied natural gas storage tank according to an embodiment of the present invention, and an adhesive construction method using the same will be described.

1 and 2 are perspective views of an adhesive construction device (hereinafter, referred to as "glue construction device") 100 for installing a secondary barrier of a liquefied natural gas storage tank according to an embodiment of the present invention.

1 and 2, the adhesive construction device 100 according to an embodiment may include a frame 10, a driving unit 20, a heating unit 30, and a supply unit to attach an adhesive to an exposed portion of a main secondary barrier. 40 and the pressurizing part 50 are included.

Figure 3 is a flow chart of the adhesive construction method for the secondary barrier installation of the liquefied natural gas storage tank according to an embodiment of the present invention (hereinafter referred to as "glue construction method" for convenience).

Referring to Figure 3, the adhesive construction method according to an embodiment using the adhesive construction device 100 of Figures 1 and 2, the flow chart of Figure 3 to attach the adhesive to the exposed portion of the primary secondary barrier The same steps are included.

For example, the adhesive construction method of the embodiment is a heating step (ST1) for heating the exposed portion of the main secondary barrier with the heating unit 30, the adhesive film (F) supplied to the supply unit 40, the pressing unit 50 Pressing step (ST2) to attach to the exposed portion of the main secondary barrier by pressing with pressure, and removing step of separating and removing the protective film (L2) (see Fig. 6) leaving the adhesive (L1) in the adhesive film (F) ( ST3).

FIG. 4 is a plan view of a state in which adhesive is applied by the adhesive construction device 100 for installing a secondary barrier of the LNG storage tank of FIGS. 1 and 2, and FIG. 5 is along the line V-V in the construction state of FIG. 4. It is sectional drawing cut out (for convenience, the guide 44 of FIG. 6 is removed and shown).

In order to help understand the adhesive construction device 100 and the adhesive construction method according to an embodiment, with reference to Figures 4 and 5, the thermal insulation and impermeable cross-sectional structure provided in the LNG storage tank will be described.

Referring to FIG. 5, the LNG storage tank includes a lower insulation board 64, a primary secondary barrier 62, an upper insulation board 63, and a primary barrier 61 that are sequentially stacked on the hull inner wall 60. ).

The lower insulation board 64 is an insulation board positioned between the main secondary barrier 62 and the hull inner wall 60, and the lower insulation member protective plate fixedly mounted to the hull inner wall 60 by a fixing member (not shown) ( 641 and a lower heat insulating member 642 attached to the lower heat insulating member protection plate 641.

The upper insulation board 63 is an insulation board positioned between the primary barrier 61 and the main secondary barrier 62, and the upper insulation member 632 and the upper insulation member attached to the primary secondary barrier 62. An upper heat insulating member protection plate 631 attached to the 632.

For example, the lower and upper insulating members 642 and 632 are formed of polyurethane foam to impart thermal insulation between the hull inner wall 60 and the liquefied natural gas, and the lower and upper insulating member protective plates 641 and 631 are plyed. It is formed of wood to impart the mechanical rigidity of the lower insulation members 642 and 632.

In addition, the main secondary barrier 62 is formed of a metal composite laminate to form an opaque structure, and the primary barrier 61 is formed of a stainless steel membrane to form an opaque structure. Substantially, the primary barrier 61 is shown to explain the structure of the storage tank although it is not installed in the step of using the adhesive construction device.

Referring to FIG. 4, the lower insulation board 64 has a set area and is spaced apart from the inner hull inner wall 60 at a second interval G2 set in the x and y-axis directions. The range of the second interval G2 is set within the range of absorbing the contraction and expansion of the lower insulation board 64. The primary secondary barrier 62 is attached to the upper surface of the lower insulation board 64 to form a secondary barrier together with an auxiliary secondary barrier (not shown), to the liquid natural gas leaked from the primary barrier 61. As a secondary safety device, it forms a secondary impermeable structure.

The upper insulation board 63 is set to a smaller area than the lower insulation board 64 and the main secondary barrier 62, and is spaced at a first interval G1 and attached to the upper surface of the main secondary barrier 62. . Accordingly, the main secondary barrier 62 forms a surface (hereinafter referred to as an “exposure portion 621”) exposed along the outer periphery of the upper insulation board 63 in the vicinity spaced at the second interval G2. . The primary barrier 61 is attached to the upper surface of the upper insulation board 63 to directly contact the stored liquefied natural gas, and forms a primary impermeable structure.

Since the first gap G1 of the upper insulation board 63 is formed to be wider than the second gap G2 of the main secondary barrier 62, the exposed portion 621 of the main secondary barrier 62 is formed of a first, The area corresponding to the difference between the second intervals G1 and G2 is set.

The adhesive construction apparatus 100 of one embodiment is configured to apply the adhesive L1 to the exposed portion 621 of the primary secondary barrier 62, and the adhesive construction method attaches the adhesive L1 to the exposed portion 621. To be done.

1 and 2, in the adhesive construction apparatus 100, the frame 10 is configured to mount the driving unit 20, the heating unit 30, the supply unit 40, and the pressing unit 50. . The driver 20 is configured to drive the frame 10 in response to the exposed portion 621 of the main secondary barrier 62 spaced apart from the second interval G2.

The heating portion 30 is configured to heat the exposed portion 621 of the main secondary barrier 62. The supply part 40 is comprised so that the adhesive film F may be supplied to the exposed part 621 (refer FIG. 4, FIG. 5). The pressing part 50 presses the adhesive film F supplied to the exposed part 621, and attaches it (refer FIG. 6).

The protective film L2 can also be removed manually from the adhesive film F attached.

Referring to FIG. 3, in the adhesive construction method using the adhesive construction apparatus 100, the heating step ST1 is a main secondary barrier to the heating unit 30 provided in the frame 10 driven by the driving unit 20. The exposed portion 621 of 62 is heated.

In the pressing step ST2, the adhesive film F supplied to the supply part 40 is pressed by the pressing part 50 and attached to the exposed part 621 of the heated primary secondary barrier 62. At this time, the heating of the exposed portion 621 is the melting of the adhesive (L1) to be attached It can proceed within the range.

The removal step ST3 can remove the protective film L2 manually from the adhesive film F attached.

That is, the adhesive L1 attached to the exposed portion 621 by the heating and pressing steps ST1 and ST2 is not cured, but after the auxiliary secondary barrier (not shown) is attached to the exposed portion 621, the secondary secondary barrier is applied. It may be cured by heat transferred through.

The secondary secondary barrier attachment step ST4 may be performed as a separate device after the adhesive construction device 100 and the construction method of one embodiment. By attaching the secondary secondary barrier to the exposed portion, the impermeable structure of the secondary barrier is completed.

The adhesive construction apparatus 100 and a construction method thereof according to an embodiment have been described above, and the adhesive construction apparatus 100 implementing the adhesive construction method will be described in more detail below. In order to avoid overlapping base materials, the adhesive construction method concerned is demonstrated together, demonstrating the adhesive construction apparatus 100. FIG.

5 is a cross-sectional view taken along the line VV in the construction state of FIG. 4, FIG. 6 is a right side view of FIG. 1, FIG. 7 is a plan view of FIG. 1, FIG. 8 is a front view of FIG. 1, and FIG. 9 is 1 is a rear view.

1, 2, and 5 to 9, the frame 10 includes first direction members 11 disposed along a travel direction (x-axis direction) of the adhesive construction device 100, and a travel direction. The second direction members 12 are disposed in a second direction (y-axis direction) intersecting the second direction members 12 to connect the first direction members 11.

The first and second directional members 11 and 12 may include the hull inner wall 60, the primary and secondary barriers 61 and 62, the upper and lower insulating boards 63 and 64, and the first and second spacings ( According to the size of G1, G2) it can be made an appropriate number. The second direction member 12 includes a guide groove 121 for guiding the driving unit 20 in the second direction.

When the first direction members 11 are arranged in plurality in a height direction (z-axis direction) as in an exemplary embodiment, the frame 10 may have a third direction connecting the first direction members 11. It may further comprise a member (13).

The driving unit 20 includes a plurality of driving rolls 21, a motor 23 driving the driving rolls 21, and a driving roll 21 driven in close contact with the side surfaces of the upper insulation board 63 by rolling friction. Width 22 for moving in the direction (y-axis direction), and supporting rolls 24 (for convenience, shown only in FIG. 4) mounted to the frame 10 and rolling on the upper insulation board 63. .

As shown in FIG. 5, the driving roll 21 is driven in close contact with the rolling friction on the side surface of the upper insulating member protection plate 631 of the upper insulating board 63. The width adjusting part 22 includes the width adjusting member 221, the lead screw 222, and the motor 223, and is adjusted according to the first interval G1.

The width adjusting members 221 are arranged in pairs in parallel with the first direction member 11 to guide the grooves in the guide groove 121 of the second direction member 12 so as to move in the second direction (y-axis direction). 122, see FIG. 6).

The lead screw 222 is screwed to the width adjusting member 221 to move the width adjusting member 221 in the y-axis direction. In this case, the pair of width adjusting members 221 disposed side by side may be formed of screws in opposite directions to move in opposite directions in the y-axis direction.

The motor 223 is fixed to the frame 10 and is connected to the lead screw 222 so as to transmit power. For example, the motor 223 and the lead screw 222 may be connected to the belt and the pulley.

The motor 23 is installed below the width adjusting member 221 and is connected to the driving roll 21 to drive the driving roll 21. When the driving roll 21 is aligned with the side surface of the upper insulation member protection plate 631 to provide driving force, the support roll 24 supports the load of the adhesive construction device 100 on the upper insulation member protection plate 631. Move the frame 10.

The heating part 30 is disposed in front in the advancing direction (x-axis direction) of the adhesive construction device 100 to heat the exposed part 621. The heating part 30 includes a plate heater 31 corresponding to the exposed part 621, and a cylinder 32 connected to the plate heater 31 to extend and contract.

The plate heater 31 may uniformly heat the plane of the exposed portion 621 by radiation, convection or conduction. The cylinder 32 is installed in the z-axis direction in the extension portion 14 extending further to the front of the frame 10 to extend and contract, thereby adjusting the distance between the plate heater 31 and the exposed portion 621.

By the operation of the plate heater 31, the exposed portion 621 of the main secondary barrier 62 is heated, and after heating, the adhesive film F which contacts the exposed portion 621 by the latent heat of the exposed portion 621. The adhesive L1 is heated within the melting range, and the exposed portion 621 is cured so that it remains attached to the exposed portion 621.

The supply part 40 is arrange | positioned behind the heating part 30 in the advancing direction (x-axis direction) of the adhesive construction apparatus 100, and supplies the adhesive film F to the heated exposure part 621. FIG.

FIG. 10: is a perspective view of the supply part 40 which supplies the adhesive film F, and FIG. 11 is sectional drawing cut along the XX 'line | wire of FIG. The supply part 40 includes a mounting bar 41, a movable member 42 and an elastic member 43.

The mounting bar 41 is rotatably installed in the frame 10 and is inserted into the supply roll R1 wound around the adhesive film F to mount the supply roll R1. The mounting bar 41 releases and supplies the adhesive film F, maintaining the tension set to the adhesive film F by the mounting friction with the frame 10. The set tension maintenance of the adhesive film F makes the thickness of the adhesive L1 adhered to the exposed portion 621 uniform.

The movable member 42 is moved in the radial direction from the mounting bar 41 to press the inner surface of the supply roll R1 to enable integral rotation of the supply roll R1 and the mounting bar 41. The elastic member 43 elastically supports the movable member 42 at the mounting bar 41.

The movable member 42 is composed of a pair disposed on both sides of the mounting bar 41 in the radial direction, by placing the mounting bar 41 in the center of the supply roll (R1), the mounting bar 41 and the supply roll (R1) Enables smooth rotation of

Referring back to FIGS. 1, 2 and 5 to 9, the supply part 40 is installed below the supply roll R1 to supply the adhesive film F to the main secondary barrier 62 on the supply roll R1. It may further include a guide 44 to guide the exposed portion 621 of the.

The guide 44 is formed in a convex curved surface toward the advancing direction of the adhesive construction device 100 to stably guide the adhesive film F, and guides it in contact with the protective film L2 of the adhesive film F. At this time, the adhesive L1 maintains the attachable state toward the exposed portion 621 (see FIG. 6).

The pressing unit 50 contacts the adhesive film F to the pressing plate 51 for pressing the adhesive film F, and is connected to the pressing plate 51 by the ball joint 52 so as to stretch and act on the frame 10. And a cylinder 53 to be mounted.

The pressing plate 51 is formed in a large area and touches the protective film L2 to press the adhesive film F to attach the adhesive film F to the exposed portion 621 of the main secondary barrier 62. By pressing the pressing plate 51, the adhesive L1 forms a more uniform thickness on the exposed portion 621.

The cylinder 53 is extended to pressurize the pressure plate 51. The ball joint 52 allows the pressure plate 51 to respond to the unevenness of the exposed portion 621 even when the cylinder 53 is lowered.

In addition, the pressing plate 51 is provided in plural in the width direction of the adhesive film F, so that the height difference of the exposed portion 621, the concave or convex structure, and the stepped region of the exposed portion 621 due to the second gap G2. Even in the adhesive film F can be effectively pressed.

The protective film L2 can be manually removed from the adhesive film F attached.

The adhesive construction device and the adhesive construction method for installing the secondary barrier of the LNG storage tank according to an embodiment of the present invention has been described above, but the spirit of the present invention is not limited to the embodiments presented herein. However, one of ordinary skill in the art who understands the spirit of the present invention can easily suggest another embodiment within the scope of the same spirit by adding, changing, deleting, and adding components, but this is also within the spirit of the present invention. something to do.

10 Frame 11, 12, 13: First, Second, Third Directional Members
20: drive unit 21: drive roll
22: width adjustment unit 23, 223: motor
24: support roll 30: heating part
31: plate heater 32, 53: cylinder
40: supply part 41: mounting bar
42: movable member 43: elastic member
44: guide R1: feed roll
50 pressurizing unit 51 pressurizing plate
52: ball joint 60: hull inner wall
61: primary barrier 62: primary secondary barrier
63, 64: upper and lower insulation board 100: adhesive construction device
121: guide groove 122: guide protrusion
221: width adjusting member 222: lead screw
621: exposed part 631, 641: upper and lower insulation member protective plate
632, 642: upper and lower insulation member F: adhesive film
G1, G2: first and second gap L1: adhesive
L2: Protective Film

Claims (12)

frame;
Mounted on the frame, the lower insulation board, which is sequentially stacked between the hull inner wall and the primary barrier of the liquefied natural gas storage tank is exposed between the adjacent upper insulation board of the primary secondary barrier and the upper insulation board spaced apart from each other A driving unit for driving the frame corresponding to the exposed portion of the main secondary barrier;
A heating unit mounted to the frame to heat an exposed portion of the main secondary barrier;
A supply unit mounted to the frame to supply an adhesive film to the heated exposure unit; And
A pressing unit attached to the frame to press the adhesive film supplied to the exposed unit by pressing
Adhesive construction device for the secondary barrier installation of the LNG storage tank comprising a.
The method of claim 1,
The heating unit includes:
Disposed in the forward direction of the frame,
Wherein the supply unit includes:
It is arranged behind the heating unit in the advancing direction of the frame
Adhesive construction device for secondary barrier installation of LNG storage tank.
The method of claim 2,
The heating unit includes:
A plate heater corresponding to the exposed portion, and
A cylinder connected to the plate heater and stretched
Adhesive construction device for the secondary barrier installation of the LNG storage tank comprising a.
The method of claim 1,
Wherein the supply unit includes:
A mounting bar inserted into a supply roll wound around the adhesive film and installed on the frame;
A movable member which is moved in the radial direction from the mounting bar to press the inner surface of the supply roll, and
An elastic member for elastically supporting the movable member in the mounting bar
Adhesive construction device for the secondary barrier installation of the LNG storage tank comprising a.
The method of claim 4, wherein
The movable member,
Consists of a pair disposed on both sides in the radial direction of the mounting bar
Adhesive construction device for secondary barrier installation of LNG storage tank.
The method of claim 4, wherein
Wherein the supply unit includes:
A guide installed below the supply roll to guide the adhesive film from the supply roll to the exposed portion;
Adhesive construction device for the secondary barrier installation of the LNG storage tank further comprising.
The method of claim 1,
The pressing portion
A pressure plate which contacts the adhesive film to press the adhesive film;
A cylinder mounted to the frame to be elastically actuated by being connected to a ball joint to the pressing plate
Adhesive construction device for the secondary barrier installation of the LNG storage tank comprising a.
The method of claim 1,
The frame includes:
First directional members disposed along a traveling direction of the frame,
A second direction member disposed along a second direction crossing the traveling direction and connecting the first direction members,
The second direction member is
Forming a guide groove for guiding the driving part in the second direction
Adhesive construction device for secondary barrier installation of LNG storage tank.
The method of claim 8,
The driving unit,
A plurality of drive rolls are driven in close contact with the surface friction of the upper insulation board,
A motor for driving the driving roll;
A width adjusting part for moving the driving roll in the first direction, and
Roll mounted support roll mounted on the frame on the upper insulation board
Adhesive construction device for the secondary barrier installation of the LNG storage tank comprising a.
10. The method of claim 9,
The width adjusting unit,
A width adjusting member coupled to the guide groove with a guide protrusion and arranged in pairs in parallel with the first direction member to move in the second direction,
A lead screw screwed to the width adjusting member and formed of a screw in opposite directions;
A motor for driving the lead screw
Adhesive construction device for the secondary barrier installation of the LNG storage tank comprising a.
The main secondary barrier is exposed between the lower insulation board, the main secondary barrier, and the upper insulation board neighboring one of the upper insulation board and sequentially spaced apart between the hull inner wall and the primary barrier of the LNG storage tank. A heating step of heating the exposed portion of the;
A pressurizing step of supplying an adhesive film composed of an adhesive and a protective film to press and attach the heated portion to the exposed portion; And
A removal step of removing the protective film from the adhesive film attached
Adhesive construction method for the secondary barrier installation of the LNG storage tank comprising a.
The method of claim 11,
The heating step
Heating the exposed portion within the melting range of the adhesive attached to the exposed portion
Adhesive construction method for installation of secondary barrier in LNG storage tank.

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