JP2021021443A - Method of repairing nozzle or pipe - Google Patents

Abstract

To provide a method of repairing a nozzle or pipe that can make repairs reasonably.SOLUTION: The present invention is directed to a nozzle which has one end fitted to seawater piping 100 and comprises a flange 15 at the other end as an object to be repaired, wherein a pair of half-split pipes 31a, 31b are fitted lying over the seawater piping 100 and the flange 15 not in contact with the nozzle to cover the nozzle with the pair of half-split pipes 31a, 31b, and a gap between members is filled with a repair material 51 such that a closed space is formed of the pair of half-split cylinder members 31a, 31b, the seawater piping 100, and the flange 15.SELECTED DRAWING: Figure 2

Description

The present invention relates to a method for repairing a nozzle or pipe that is attached to a pipe or the like and is corroded or damaged.

In power plants, chemical plants, etc., a strainer is installed to remove foreign matter in the fluid flowing through the piping, and the pressure difference (differential pressure) before and after the strainer is detected to control the blockage of the strainer. The differential pressure before and after the strainer is generally detected by attaching a differential pressure detector to a nozzle for detecting the differential pressure provided in the piping on the downstream side and the upstream side of the strainer.

The nozzle for differential pressure detection is corroded by long-term use. If the nozzle directly attached to the pipe is corroded, it cannot be easily replaced and must be repaired. Most of the repairs of such nozzles are by welding the backing plate, but when the piping is lined on the inner surface like a seawater pipe, the repair by welding the backing plate cannot be performed.

As a repair method other than backing plate welding, a repair method using a liquid / putty-like repair material or an adhesive is well known, and some specific methods for repairing pipes using these have been proposed. There is. For example, there is a method in which a half-split tubular clamp material fitted with a half-split ring-shaped sealing material is attached so as to cover a defective portion of a pipe, and the filler is filled while removing air in the internal space formed by them. (See, for example, Patent Document 1).

In addition, as a method of repairing the pipe connection part, a repair tool consisting of an outer wall material and a backup material is wound around the pipe connection part, a certain space is formed around the repair material, and the repair material is filled and cured to form a pipe. There is also a method of preventing fluid leakage from the connection portion (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 7-151292 Japanese Unexamined Patent Publication No. 11-63367

When the root part of the nozzle directly attached to the pipe is corroded, it is necessary to attach a half-split tubular clamp material here in order to repair this part by the method described in Patent Document 1, but the shape Cannot be installed well. Further, when the nozzle directly attached to the pipe is short, the flange at the tip portion becomes an obstacle, and the half-split tubular clamp material cannot be attached well. The method described in Patent Document 2 is also the same.

An object of the present invention is to provide a method for repairing a nozzle or pipe that can be repaired without difficulty.

In the present invention, a nozzle or pipe having one end attached to the first member and the other end having a second member or the other end connected to the second member is the object to be repaired, and a pair of half-split cylinder members are the objects to be repaired. It is attached so as to bridge between the first member and the second member without contacting an object, the object to be repaired is covered with the pair of half-split cylinder members, and the pair of half-split cylinder members and the first member are covered. This is a method for repairing a nozzle or a pipe, which comprises filling a gap between the members with a repair material so that a closed space is formed by the second member and the second member.

In the nozzle or pipe repair method of the present invention, the first member and the second member include a flange, a valve, a pipe, a storage tank or a device, and one end of the pair of half-split cylinder members covering the repair object is The pair of half-split cylinder members are fixed to the first member via a fixture so that the other ends of the pair of half-split cylinder members are in contact with the second member. Then, the gap is a gap between the pair of half-split cylinder members and the first member, a gap between the pair of half-cracked cylinder members and the second member, and a gap between the pair of half-split cylinder members. It is characterized by being.

The nozzle or pipe repair method of the present invention is characterized in that the fixture is a band member that can be attached to and detached from the pair of half-split cylinder members.

In the method for repairing a nozzle or a pipe of the present invention, the half-split cylinder member is a half-split pipe obtained by cutting a pipe having a circular or rectangular cross section in the longitudinal direction so as to pass through the central axis. One end of the repair material is used, and the other end of the half-split pipe is fixed to the first member and the second member by using a fixture.

According to the present invention, it is possible to provide a method for repairing a nozzle or a pipe that can be repaired without difficulty.

It is a flowchart which shows the repair procedure of the nozzle of 1st Embodiment of this invention. It is a figure for demonstrating the nozzle repair method of 1st Embodiment of this invention. It is a figure for demonstrating the repair object to which the nozzle repair method of 1st Embodiment of this invention is applied. It is a block diagram of the repair tool used for repairing the nozzle of 1st Embodiment of this invention. It is a block diagram of another repair tool used for repairing a nozzle of 1st Embodiment of this invention. It is a figure for demonstrating the repair method of the pipe of the 2nd Embodiment of this invention.

FIG. 1 is a flowchart showing a nozzle repair procedure according to the first embodiment of the present invention. FIG. 2 is a diagram for explaining a nozzle repair method according to the first embodiment of the present invention. FIG. 3 is a diagram for explaining a repair target to which the nozzle repair method of the first embodiment of the present invention is applied. FIG. 4 is a block diagram of a repair tool used for repairing a nozzle according to the first embodiment of the present invention, and FIG. 5 is a block diagram of another repair tool used for repairing a nozzle according to the first embodiment of the present invention. is there.

Regarding the nozzle repair method of the first embodiment of the present invention, the nozzle 10 directly welded to the seawater pipe 100 shown in FIG. 3 will be described as a repair target. The nozzle 10 is for detecting the differential pressure of a seawater strainer (not shown) provided in the seawater pipe 100, and is made of a short metal pipe having a diameter of about 15 mm. One end 11 (base end) of the nozzle 10 is directly welded to the seawater pipe 100, and the other end (tip) has a flange 15 for connecting the valve 20.

A valve 20 with a flange supported and fixed to the pedestal 110 is connected to the flange 15. A conduit 25 connected to a differential pressure detector (not shown) is connected to the tip of the valve 20. In the present embodiment, the method of repairing the nozzle 10 will be described assuming that the base end portion 11 which is the connection portion with the seawater pipe 100 is corroded. The seawater pipe 100 has a lining coating on the inner surface thereof, and cannot be repaired by welding a backing plate.

The nozzle repair tool shown below is used for repairing the nozzle 10 (see FIG. 4). The nozzle repair tool includes a pair of half-split pipes 31 (31a, 31b), a fixture 41 for fixing the half-split pipe 31 to the seawater pipe 100, and a repair material 51 for filling the gap.

The pair of half-split pipes 31 (31a, 31b) is a metal member that covers the nozzle 10, and includes a half-split pipe 31a and a half-split pipe 31b having the same shape and structure. The half-split pipes 31a and 31b shown here are one aspect of the half-split tubular member of the present invention, and can be obtained by cutting a cylindrical pipe in the longitudinal direction (axial direction) so as to pass through the central axis. Hereinafter, the half-split pipe 31a will be mainly described, and the half-split pipe 31b will be omitted by adding a subscript b to the same configuration as the half-split pipe 31a.

The radius of the inner surface of the half-split pipe 31a is substantially the same as the radius of the flange 15, and the half-split pipe 31a and the half-split pipe 31b can cover the outer periphery of the flange 15 without gaps. The length of the half-split pipe 31a in the longitudinal direction (axial direction) is the length at which the base end 33a comes into contact with the seawater pipe 100 when the tip end 34a is put on the flange 15. The base end 33a of the half-split pipe 31a is shaped so as to follow the outer wall surface 102 of the seawater pipe 100.

A metal band fixing plate 35a for attaching a band, which is a fixture 41, is welded to the vicinity of the base end 33a of the half-split pipe 31a. The band fixing plate 35a is provided with two insertion holes 36a for inserting bolts. The band fixing plate 35a is attached at a position slightly closer to the tip 34a side from the base end 33a of the half-split pipe 31a so that the head of the attached bolt 61 (see FIG. 2) does not come into contact with the outer wall surface 102 of the seawater pipe 100. Has been done.

The fixture 41 is for fixing the half-split pipe 31 to the seawater pipe 100, and is composed of a pair of metal band members 42 (42a, 42b). The band member 42a and the band member 42b basically have the same shape and structure. Hereinafter, the band member 42a will be mainly described, and the description of the band member 42b will be omitted by adding a subscript b to the same configuration as the band member 42a.

The band member 42a has an arc-shaped band body 43a having a radius substantially the same as that of the seawater pipe 100. The band main body 43a has a length of about half of the outer circumference of the seawater pipe 100, and includes a fixing plate 44a at the tip and a connecting portion 46a at the rear end.

The fixing plate 44a is a plate material substantially the same as the band fixing plate 35a attached to the half-split pipe 31a, and includes a bolt insertion hole 45a. The connecting portion 46a is a plate material provided so as to be orthogonal to the band main body 42a, and reinforcing plates are attached to both sides. The connecting portion 46a is provided with a bolt insertion hole 48a.

The mounting angle of the band fixing plate 35 with respect to the half-split pipe 31 and the mounting angle of the fixing plate 44 with respect to the band body 43 are such that the half-split pipe 31 and the band member 42 are connected and the nozzle 10 is covered with the half-split pipe 31. When the band member 42 is put on the seawater pipe 100, the tip 34 of the half-split pipe 31 is set to be in contact with the flange 15. As a result, when the band member 42 is put on the seawater pipe 100, the nozzle 10 can be covered without difficulty.

The repair material 51 is formed when the half-split pipe 31 and the band member 42 are connected and the band member 42 is put on the seawater pipe 100 so as to cover the nozzle 10 with the half-split pipe 31. It fills the gap between the pipe 31b, the gap between the half-split pipe 31 and the flange 15, and the gap between the half-split pipe 31 and the seawater pipe outer wall surface 102. Specifically, the repair material 51 includes gaps between both end faces of the half-split pipe 31a in the circumferential direction and both end faces of the half-split pipe 31b in the circumferential direction, gaps between the tips 34a and 34b of the half-split pipe 31 and the flange 15. Further, the gap between the base ends 33a and 33b of the half-split pipe 31 and the seawater pipe outer wall surface 102 is filled. As such a repair material 51, a curing material (agent), a sealing material (agent), a sealing material (agent), a sealant, or the like that cures over time after application can be used.

The repair procedure of the nozzle 10 of the first embodiment of the present invention will be described. In the present embodiment, the seawater pipe 100 corresponds to the first member of the present invention, and the flange 15 corresponds to the second member of the present invention. As shown in FIGS. 1 and 2, as the first step (step S1), the repair material 51 is applied around the contact portion between the head of the bolt 21 connecting the flange 15 and the valve 20 and the flange 15. This is to prevent the seawater from leaking to the outside through the bolt holes of the flange 15 when the nozzle 10 is corroded and the seawater leaks.

Next, the pair of half-split pipes 31 and the pair of band members 42 are connected (step S2). Specifically, the band fixing plate 35a provided at the base end 33a of the half-split pipe 31a and the fixing plate 44a provided at the tip of the band member 42a are overlapped and formed into two bolt insertion holes 36a and 45a. The bolt 61 is inserted and tightened with the nut 62 to connect the half-split pipe 31a and the band member 42a. The same applies to the other half-split pipe 31b and the band member 42b. The order of step S1 and step S2 may be interchanged, and step S1 may be performed after step S3.

Next, the band member 42 connected to the half-split pipe 31 is put on the seawater pipe 100 so as to sandwich the nozzle 10 from above and below, so that the tips 34a and 34b of the half-split pipes 31a and 31b are in contact with the flange 15. The upper and lower half-split pipes 31a and 31b are aligned so that the base ends 33a and 33b are in contact with the outer wall surface 102 of the seawater pipe. In this state, marking is performed at a position where the base ends 33a and 33b of the half-split pipes 31a and 31b are in contact with the seawater pipe outer wall surface 102 (step S3).

After the marking is performed, the band member 42 connected to the half-split pipe 31 is removed, and the repair material 51 is applied to the marked portion of the seawater pipe outer wall surface 102 and its periphery. Further, the repair material 51 is also applied to the outer peripheral surface of the flange 15 (step S4). The repair material 51 applied to the outer peripheral surface of the flange 15 functions as a filler for filling the gap and also as an adhesive for adhering the half-split pipe 31 to the flange 15.

In step S4, the repair material 51 is applied to the marking portion after the band member 42 connected to the half-split pipe 31 is fixed to the seawater pipe 100, and then the base end 33 of the half-split pipe 31 and the outside of the seawater pipe. This is because it is difficult to apply the repair material 51 to the gap with the wall surface 102. Even after the band member 42 connected to the half-split pipe 31 is fixed to the seawater pipe 100, the repair material 51 is applied so as to fill the gap between the base end 33 of the half-split pipe 31 and the seawater pipe outer wall surface 102. This step may be omitted if it can be done. The same applies to the repair material 51 applied to the outer peripheral surface of the flange 15.

Again, the band member 42 connected to the half-split pipe 31 is put on the seawater pipe 100 so that the tips 34a and 34b of the half-split pipes 31a and 31b are in contact with the flange 15 and the bases of the half-split pipes 31a and 31b. The ends 33a and 33b are attached so as to be in contact with the outer wall surface 102 of the seawater pipe (step S5).

In this state, the connecting portions 46a and 46b of the upper and lower band members 42a and 42b are connected by connecting bolts, and the pair of band members 42 to which the half-split pipe 31 is connected are fixed to the seawater pipe 100 (step S6). In this state, if the half-split pipe 31a and the half-split pipe 31b are in contact with each other with almost no gap and the tip 34 of the half-split pipe 31 covers the flange 15 with almost no gap, the repair material 51 is applied so as to fill the gaps in various places. Apply (step S7). The repair material 51 is applied so as to be liquid-tight so that the liquid does not leak to the outside through the gap between the members.

On the other hand, when the pair of band members 42 to which the half-split pipe 31 is connected are fixed to the seawater pipe 100, between the half-split pipe 31a and the half-split pipe 31b, or between the tip 34 of the half-split pipe 31 and the outer peripheral surface of the flange 15. If there is a large gap between the two, it is better to close the gap with a wire or the like. The act of closing the gap using a wire or the like may be performed prior to connecting the upper and lower band members 42a and 42b with the connecting bolt.

The action in the method of repairing the nozzle 10 according to the first embodiment of the present invention is completed in steps S1 to S7. After that, when the repair material 51 applied in step S7 is cured, the repair of the nozzle 10 is completed.

Next, another repair tool used for repairing the nozzle 10 will be described with reference to FIG. The repair tool shown in FIG. 5 differs from the repair tool shown in FIG. 4 only in the half-split pipes 32 (32a, 32b). Here, the half-split pipe 32 corresponds to the half-split cylinder member of the present invention. In the repair tool shown in FIG. 5, the same components as those of the repair tool shown in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted.

The half-split pipe 32 shown in FIG. 5 is different from the half-split pipe 31 shown in FIG. 4 in that flanges 38 (38a, 38b) are provided on both side surfaces. Since the flange 38 is provided with bolt insertion holes 39 (39a, 39b), the half-split pipe 32a and the half-split pipe 32b can be connected using this. Such flanged half-split pipes 32 can be stably connected to each other.

The method of using the half-split pipe 32 is basically the same as that of the half-split pipe 31 of the first embodiment. In step S5, the band member 42 connected to the half-split pipe 32 is attached to the seawater pipe 100, and in step S6, the connecting portions 46a and 46b of the upper and lower band members 42a and 42b are connected by connecting bolts, and the half-split pipe 32 is connected. The pair of band members 42 are fixed to the seawater pipe 100.

The connection between the flange 38a of the half-split pipe 32a and the flange 38b of the half-split pipe 32b may be performed after step S5 and prior to step S6, or after step S6 and before step S7. For the connection between the flange 38a of the half-split pipe 32a and the flange 38b of the half-split pipe 32b, a gasket is interposed between the flange 38a and the flange 38b, or a repair material 51 is applied so that seawater does not leak from this portion. To do so.

Since both ends of the half-split pipe 31 of the first embodiment are attached so as to be in contact with the seawater pipe outer wall surface 102 and the flange 15, they can be stably fixed without wobbling. On the other hand, the connection between the half-split pipe 31a and the half-split pipe 31b is performed by using the repair material 51. Therefore, when the length of the half-split pipe 31 in the longitudinal direction (axial direction) is long, the half-split pipe 31 is twisted and deformed such as bending, and the half-split pipe 31a and the half-split pipe 31b are connected to each other for repair. An unreasonable force is applied to the material 51, which may cause cracks in the repair material 51. It is preferable to appropriately select and use the flangeless half-split pipe 31 and the flanged half-split pipe 32 according to the length in the longitudinal direction (axial direction) of the object to be repaired and the surrounding conditions.

FIG. 6 is a diagram for explaining a method of repairing the pipe 12 according to the second embodiment of the present invention. The pipe 12 shown in FIG. 6 is a pipe that connects the two left and right devices 120 and 150, and the pipe 12 is the object to be repaired. One end 13 of the pipe 12 is directly attached to a rectangular parallelepiped protrusion 124 provided on the side surface 122 of the storage tank 120, and the other end is directly attached to the device 150. The size and shape of the cross section of the protrusion 124 and the device 150 are the same. In the present embodiment, the protrusion 124 corresponds to the first member of the present invention, and the device 150 corresponds to the second member of the present invention.

The method of repairing the pipe 12 of the second embodiment is basically the same as the method of repairing the nozzle 10 of the first embodiment, using a pair of half-split cylinder members 40 (40a, 40b) and a repair agent 51. Do. The pair of half-split tubular members 40 (40a, 40b) correspond to the pair of half-split pipes 31 (31a, 31b) of the first embodiment, and the repair agent 51 is the same as that described in the first embodiment. Can be used. In the present embodiment, the half-split cylinder member 40 corresponds to the half-split cylinder member of the present invention.

The cross section of the pair of half-split cylinder members 40 is U-shaped corresponding to the cross section of the protrusion 124 and the device 150, and the protrusion 124 and the device 150 are in a state where the half-split cylinder member 40a and the half-split cylinder member 40b are butted against each other. The cross section of the can be covered with almost no gap. In the present embodiment, since the square pipe having substantially the same internal dimensions as the protrusion 124 and the cross section of the device 150 is not commercially available, the plate material is bent or a plurality of plate materials are welded to form a pair of half-split cylinder members 40. It has gained.

In the present embodiment, since the pair of half-split cylinder members 40 can be attached so as to bridge the protrusion 124 and the device 150, the band member 42 used in the first embodiment is not required. However, as in the first embodiment, the pair of half-split cylinder members 40 may be fixed to the storage tank 120 via the band member 42.

The repair procedure of the pipe 12 will be described. The repair agent 51 is applied to the back surfaces of both ends of the pair of half-split cylinder members 40a and 40b, and is attached so as to span the protrusions 124 and the device 150 from the left and right. Attaching the pair of half-split cylinder members 40a and 40b so as to cover the protrusions 124 and the device 150 from the left and right makes it difficult for the pair of half-split cylinder members 40a and 40b to fall off as compared with the case where the pair of half-split cylinder members 40a and 40b are covered from the vertical direction. Because. If necessary, the pair of half-split cylinder members 40a and 40b are fixed to the protrusion 124 and the device 150 using a wire or the like.

Next, as in the repair of the nozzle 10 of the first embodiment, the gap between the half-split cylinder member 40 and the protrusion 124, the gap between the half-split cylinder member 40 and the device 150, the half-split cylinder member 40a and the half-split cylinder member Apply so as to fill the gap with 40a with the repair agent 51.

As described above using the nozzle repair method of the first embodiment and the pipe repair method of the second embodiment, the nozzle or pipe repair method of the present invention covers the nozzle and pipe to be repaired. A pair of half-split cylinder members are hung on the first member such as a pipe, a protrusion, etc., and the second member such as a flange, a device, etc., to which both ends of the object to be repaired are connected, and the gap between the members is filled with a repair agent. A closed space is formed with, and nozzles and pipes, which are the objects to be repaired, are placed in this closed space. Therefore, even a nozzle or pipe having a complicated shape such as a nozzle directly attached to a pipe, a storage tank, or a device, or a short pipe with a flange can be repaired without difficulty.

In such a repair method, even if the nozzle or pipe is corroded and a liquid such as seawater leaks from the nozzle or pipe, the leaked liquid stays in the closed space and does not leak to the outside. If the amount of liquid leaked increases and the pressure in the closed space becomes the same as the pressure in the first or second member of the pipe, device, etc., or if the closed space is filled with liquid, the nozzle or pipe The leakage of liquid from the air stops naturally.

The nozzle or pipe repair method of the present invention can be easily repaired on-site because it is not necessary to remove the object to be repaired when performing the repair. Further, although the repair tool used for repair is made of metal, it does not require welding, so that it can be applied to a wide range of repair objects.

When a pair of half-cracked cylinder members are directly attached to the nozzle or pipe to be repaired and the repair agent is applied, an unreasonable load or an unexpected load is applied to the nozzle or pipe and the nozzle or pipe starts from the corroded part. It may be damaged or cracked. On the other hand, in this repair method, since the pair of half-cracked cylinder members and the repair agent do not come into direct contact with the nozzle and pipe to be repaired, no load or load is applied to the nozzle or pipe, and there is a risk of breakage or cracking. There is no.

Further, this repair method can be said to be a preferable repair method from the viewpoint of protecting the corroded nozzle or pipe because the pair of half-split cylinder members function as a cover for the nozzle or pipe and further as a reinforcing material for the nozzle or pipe. ..

The nozzle or pipe repair method according to the present invention is not limited to the above embodiment, and can be changed and used without changing the gist. In the first embodiment, the nozzle attached to the seawater pipe and in the second embodiment, the pipe attached to the protrusion of the storage tank is the object to be repaired, but the object to be repaired is not limited to the above embodiment. .. The object to be repaired in the nozzle or pipe repair method according to the present invention may be a nozzle or pipe having one end attached to the first member and the other end having a second member or the other end connected to the second member. The first member and the second member include flanges, valves, pipes, storage tanks or devices.

In the first embodiment, in addition to the half-split pipe as a repair tool, a half-split pipe with a flange is shown, but the half-split pipe with a flange can also be applied to the half-split pipe of the second embodiment. ..

In the above embodiment, as the half-split cylinder member, a half-split pipe having a semicircular cross section and a half-split pipe with a flange are shown in the first embodiment, and a half-split cylinder member having a U-shaped cross section is shown in the second embodiment. In the present invention, the cross-sectional shape of the half-split cylinder member is not limited to a semicircle or a U-shape. The cross-sectional shape of the half-split cylinder member may be any one corresponding to the cross-sectional shape of the first member and the second member over which the half-split cylinder member is bridged, and the cross-sectional shapes of the first member and the second member are elongated holes, six. It may be square or the like. Further, the cross-sectional shapes of both ends of the half-split cylinder member may be different.

The pair of half-split pipes of the first embodiment has the same two half-split pipes, and the pair of half-split pipe members of the second embodiment also have the same two half-split pipe members. In the nozzle or pipe repair method of the present invention, the pair of half-split cylinder members is basically composed of the same two half-split cylinder members, but the two half-split cylinder members are the first member and / Alternatively, the sizes and shapes of the two half-split cylinder members may be different as long as the second member can be covered without a gap.

The manufacturing procedure of the pair of half-split cylinder members is not particularly limited. Therefore, the half-split pipe of the first embodiment may be a plate material that can be bent so as to have a semicircular cross section. On the other hand, in the case of a pair of half-split pipes, it can be easily manufactured by using a commercially available cylindrical pipe (piping) as the original material. Even if the cross-sectional shape of the first member and the second member to which the pair of half-split cylinder members are attached is rectangular as in the second embodiment, if a commercially available square pipe can be used, it can be easily used. A half-split tubular member (half-split pipe) can be obtained.

Although preferred embodiments have been described with reference to the drawings, those skilled in the art will readily assume various changes and modifications within the obvious scope of this specification. Therefore, such changes and amendments are construed as being within the scope of the invention as defined by the claims.

10 Nozzle 11 Base end, Connection part 12 Pipe 15 Flange 20 Valve 31, 31a, 31b Half-split pipe 32, 32a, 32b Half-split pipe 33, 33a, 33b Base end 34, 34a, 34b Tip 40, 40a, 40b Half Cracked cylinder members 42, 42a, 42b Band members 43a, 43b Band body 51 Repair material 100 Seawater piping 120 Storage tank 150 Equipment

Claims (4)

A nozzle or pipe having one end attached to the first member and the other end having a second member or the other end connecting to the second member is to be repaired.
A pair of half-cracked cylinder members are attached so as to bridge the first member and the second member without contacting the repair target, and the repair target is covered with the pair of half-cracked cylinder members.
A method for repairing a nozzle or pipe, which comprises filling a gap between members with a repair material so that a closed space is formed by the pair of half-split cylinder members, the first member, and the second member. The first member and the second member include flanges, valves, pipes, storage tanks or devices.
The pair of half-split cylinder members are provided so that one end of the pair of half-split cylinder members covering the object to be repaired is in contact with the first member and the other end of the pair of half-split cylinder members is in contact with the second member. It is fixed to the first member or the second member via a fixture, and
The gap is a gap between the pair of half-split cylinder members and the first member, a gap between the pair of half-split cylinder members and the second member, and a gap between the pair of half-split cylinder members. The method for repairing a nozzle or pipe according to claim 1. The method for repairing a nozzle or pipe according to claim 2, wherein the fixture is a band member that can be attached to and detached from the pair of half-split cylinder members. The half-split cylinder member is a half-split pipe obtained by cutting a pipe having a circular or rectangular cross section in the longitudinal direction so as to pass through the central axis.
Any of claims 1 to 3, wherein one end of the half-split pipe is fixed to the first member and the second member by using the repair material and the other end of the half-split pipe using a fixture. The method for repairing a nozzle or pipe according to item 1.

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