JP6216690B2 - Manufacturing method of new pipeline and pipe material - Google Patents

Description

  The present invention relates to a method for manufacturing a new pipeline by a pipe-in-pipe method for constructing a new pipeline by inserting a pipe material into an existing pipeline, and a pipe used for constructing a new pipeline.

  Conventionally, when existing pipelines such as water and sewage pipelines and agricultural water pipelines have become obsolete, new pipes are inserted and placed in existing pipelines to form new pipelines (new pipelines). The in-pipe method is known. In this pipe-in-pipe construction method, for example, using a transport carriage described in Patent Document 1, a pipe material for constructing a new pipeline is conveyed into the existing pipeline.

  In addition, as disclosed in Patent Document 1, an entrained steel pipe may be used as a pipe material for constructing a new pipeline. By using such an entrained steel pipe, the outer diameter during transportation can be made smaller than that of a normal steel pipe. Therefore, even if the length dimension is larger than that of a normal steel pipe, it passes through the bent portion of the existing pipe line. It is possible to reduce the number of pipes used for the newly installed pipeline.

Japanese Utility Model Publication No. 03-55338

  However, the transportation method disclosed in Patent Document 1 is poor in transportation efficiency because it transports new pipe materials one by one, and even if a rolled steel pipe is used as a new pipe material, the transportation process becomes a bottleneck, and the construction of a new pipeline Takes time. In addition, it is conceivable to use sophisticated and complicated transportation equipment to improve transportation efficiency, but if such equipment breaks down in the existing pipeline, transportation work may be interrupted. It is difficult to use complicated and complicated equipment.

  The present invention has been made in view of the above-described circumstances, and a manufacturing method of a new pipeline capable of efficiently constructing a new pipeline and a pipe used for constructing the new pipeline by a simple method. provide.

The present invention employs the following means in order to solve the above problems.
That is, the manufacturing method of a new pipeline according to one aspect of the present invention includes a pipe-in-pipe method for inserting a pipe material into an existing pipeline and constructing the new pipeline in the existing pipeline. In the manufacturing method, a part of the circumferential direction is unjoined, and an end portion on one side in the circumferential direction is unwound in the unjoined portion. A tube material preparing step for preparing the tube material composed of the outer tube and the inner tube by inserting the tube inside the outer tube, a tube material inserting step for inserting the tube material inside the existing pipe line, Inside the existing pipe line, a step of taking out the inner pipe from the outer pipe, a joining step of joining an unjoined portion of the inner pipe taken out from the outer pipe, the outer pipe and the inner pipe Butt joints that perform circumferential joining by matching each other so that their axes coincide Characterized in that it comprises a degree, the.

  According to such a method for manufacturing a new pipe, it is possible to insert the inner pipe as an entrainment pipe inside the outer pipe in the existing pipe. Therefore, the outer tube and the inner tube can be simultaneously transported and inserted into the existing pipe line by simply inserting the inner tube inside the outer tube without using a special transport device. Compared with the case where the pipes are individually inserted into the existing pipelines, it is possible to reduce the labor required for transporting the pipe materials. Furthermore, since the entrainment pipe is used as the inner pipe, it is possible to use a pipe material for a newly installed pipe that has multiple inner pipes with the same diameter as the outer pipe inside the outer pipe. In this case, the labor required for transportation can be further reduced.

  In the pipe preparation step, as the outer pipe, a part of the circumferential direction is unjoined, and an edge part on one side in the circumferential direction is wound inside the edge part on the other side in the unjoined part. You may use the entrainment pipe | tube which becomes.

  In this way, the outer tube is also a winding tube, so that the product can be shared with the inner tube. In addition, the joint process for the outer tube and the inner tube can be made common, leading to shortening of the process.

  Further, in the tube material preparation step, using the entrainment tube in which the inner surface of the unjoined portion is an unpainted surface as the outer tube, and using the entrainment tube in which the outer surface is a painted surface as the inner tube, The tube material may be prepared by arranging a strip-shaped member extending in the axial direction of the outer tube on an unpainted surface and placing the inner tube on the strip-shaped member.

  Thus, in the entrainment tube, since it is necessary to finally join the unjoined portion that has been involved, the inner surface of the unjoined portion may be unpainted. Therefore, when the inner tube is inserted into the outer tube, if the painted surface of the inner tube comes into contact with the unpainted surface of the outer tube, the coating of the inner tube may be peeled off. Therefore, by providing a belt-like member on which the inner pipe is placed, there is no direct contact between the unpainted surface of the outer pipe and the painted surface of the inner pipe, thereby suppressing peeling of the inner pipe during transportation. Can do.

  Moreover, in the said pipe material preparation process, you may prepare what provided the buffer member between the said outer tube and the said inner tube as said pipe material.

  By providing such a buffer member, the outer tube and the inner tube are not directly in contact with each other, and by providing the buffer member without a gap between the outer tube and the inner tube, the outer tube at the time of transporting the pipe material And the relative displacement between the inner tube and the inner tube can be restricted. Therefore, transportation can be facilitated and damage to the outer tube and the inner tube can be suppressed.

  Moreover, in the said pipe material preparation process, you may prepare as the said pipe material that the dimension of the axial direction of the said inner pipe is smaller than the dimension of the axial direction of the said outer pipe.

  In this way, the inner tube is accommodated in the outer tube by making the axial dimension of the inner tube smaller than that of the outer tube. For this reason, even if there is a step or the like in the existing pipe line, it is possible to prevent the inner pipe from being caught by such a step during the transportation of the pipe material and hindering the transportation work.

  A pipe material according to one aspect of the present invention is a pipe material used in a pipe-in-pipe method that is inserted into an existing pipe line and constructs a new pipe line in the existing pipe line, and part of the circumferential direction is not yet formed. An inner tube that is a joining tube and is an entrained tube in which an edge portion on one side in the circumferential direction is wound inside an end edge portion on the other side in an unjoined portion, and an outer tube that houses the inner tube inside And.

  Thus, since the pipe material has a configuration in which the inner pipe is inserted inside the outer pipe, the outer pipe and the inner pipe can be simultaneously transported and inserted into the existing pipeline without using a special transport device or the like. Therefore, compared with the case where the outer pipe and the inner pipe are individually inserted into the existing pipe line, the labor required for transporting the pipe material can be reduced. Furthermore, since the entrainment tube is used as the inner tube, it is possible to insert multiple inner tubes having the same diameter as the outer tube inside the outer tube. Can be reduced.

  The outer tube is a winding tube in which a part in the circumferential direction is unjoined, and an end edge part on one side in the circumferential direction is wound inside the end edge part on the other side in the unjoined part. May be.

  In this way, by using the outer tube as the entrainment tube, the product can be shared with the inner tube. Moreover, the process of joining the unjoined portions of the outer pipe and the inner pipe can be made common, and the production efficiency of the newly installed pipe can be further improved.

  Further, in the above pipe material, the inner surface of the unjoined portion of the outer pipe is a non-painted surface, the outer surface of the inner pipe is a painted surface, and the pipe material is the non-painted surface. It may be further provided with a belt-like member that is arranged on the surface and extends in the axial direction of the outer tube, and on which the inner tube is placed.

  By providing a belt-like member for placing the inner pipe in this way, the non-coated surface of the inner surface of the outer pipe and the painted surface of the inner pipe are not in direct contact, and the peeling of the inner pipe paint during transportation is suppressed. can do.

  Moreover, said pipe | tube material may further be provided with the buffer member provided between the said outer tube | pipe and the said inner tube | pipe.

  By providing such a buffer member, the outer tube and the inner tube are not in direct contact with each other. In addition, by providing a buffer member between the outer tube and the inner tube without a gap, the relative displacement between the outer tube and the inner tube during the transportation of the tube material can be restricted, and the outer tube and Damage to the inner tube can be suppressed.

  In addition, the pipe material may have a smaller dimension in the axial direction of the inner pipe than a dimension in the axial direction of the outer pipe.

  Thus, the inner tube is accommodated in the outer tube because the inner tube has a smaller dimension in the axial direction than the outer tube. For this reason, even if there is a step or the like in the existing pipe line, it is possible to prevent the inner pipe from being caught by such a step during transportation and hindering the transportation work.

  According to the manufacturing method of the new pipe line of claim 1, the new pipe line can be efficiently constructed by a simple method by using the pipe material in which the inner pipe is inserted inside the outer pipe.

  In addition, according to the method for manufacturing a new pipeline of claim 2, it is possible to construct the new pipeline more efficiently.

  Moreover, according to the manufacturing method of the new pipeline of Claim 3, the coating repair etc. become unnecessary by suppressing peeling of the coating of an inner pipe, and it can construct a new pipeline more efficiently.

  Moreover, according to the manufacturing method of the newly established pipeline of claim 4, the reliability of the newly established pipeline can be enhanced by suppressing the damage of the outer tube and the inner tube.

  Moreover, according to the manufacturing method of the newly installed pipe line of Claim 5, a pipe material can be conveyed further easily.

  Further, by using the pipe material of claim 6, since this pipe material is an inner pipe inserted inside the outer pipe, a new pipe line can be efficiently constructed by a simple method.

  Further, by using the pipe material according to claim 7, it is possible to construct a new pipeline more efficiently.

  Further, by using the pipe material according to claim 8, by suppressing the peeling of the coating of the inner pipe during the transportation of the pipe material, it is not necessary to repair the coating, and a new pipeline can be constructed more efficiently.

  In addition, by using the pipe material according to the ninth aspect, it is possible to suppress the damage of the outer pipe and the inner pipe at the time of transporting the pipe material, thereby improving the reliability of the newly installed pipeline.

  Further, by using the pipe material according to claim 10, the pipe material can be transported more easily.

It is sectional drawing which shows the mode of the inside of an existing pipeline when a new pipeline is constructed with the manufacturing method of a new pipeline concerning an embodiment of the present invention, and (a) shows conveyance of a pipe, (B) shows a state where a new pipeline is being constructed. It is a cross-sectional view which shows the pipe material used with the manufacturing method of the newly installed pipeline which concerns on embodiment of this invention. It is a longitudinal cross-sectional view which shows the pipe material used with the manufacturing method of the newly installed pipeline which concerns on embodiment of this invention. It is a flowchart which shows the process of the manufacturing method of the new pipeline which concerns on embodiment of this invention.

Hereinafter, the manufacturing method of the newly installed pipeline 200 of this embodiment is demonstrated.
As shown in FIG. 1, in the manufacturing method of the new pipeline 200, the new pipeline 200 is constructed in the existing pipeline 100 by inserting the pipe material 1 as the material of the new pipeline 200 into the existing pipeline 100. This is a method of constructing a new pipeline 200 by a so-called pipe-in-pipe method.
The existing pipe line 100 is buried in the underground U and extends in the horizontal direction (horizontal direction). When implementing the pipe-in-pipe construction method, a new pipeline 200 is constructed from a vertical shaft that communicates with the existing pipeline 100 and extends from the existing pipeline 100 toward the ground surface SF and opens to the surface SF. The pipe material 1 is inserted into the existing pipe line 100.

Here, the pipe material 1 used for the manufacturing method of the newly installed pipe line 200 is demonstrated.
As shown in FIG. 2, the tube material 1 is disposed on the outer tube 2, the inner tube 12 inserted inside the outer tube 2 and disposed inside the outer tube 2, and the inner surface of the lower portion of the outer tube 2. A belt-like member 20 on which the inner tube 12 can be placed, and a buffer member 21 provided between the outer tube 2 and the inner tube 12.
The outer pipe 2 is a steel pipe centered on the axis O1, and a part in the circumferential direction is unjoined over the entire area of the axis O1, and an end edge 3 on one side in the circumferential direction is the other side of the unjoined portion 2a. This is a winding tube that is wound inside the side edge 4 on the side.

  The outer surface 5 of the outer tube 2 is painted and becomes a painted surface 6. On the other hand, in the circumferential region where the unjoined portion 2a is entangled, that is, in the circumferential region where the one end edge 3 and the other end edge 4 overlap, the one end The inner surface 7 of the edge 3 and the edge 4 on the other side is not coated, and is a non-coated surface 8. In the region other than the region in the circumferential direction where the unjoined portion 2 a is entangled, the inner surface 7 is painted in the same manner as the outer surface 5.

  In the present embodiment, the region of the non-coating surface 8b of the other end edge 4 is formed wider than the region of the non-coating surface 8a of the end edge 3 on one side, and the end edge 4 of the other side is formed. The unpainted surface 8b extends from the tip end portion of the one end edge portion 3 to a position separated in the circumferential direction.

  In the unjoined portion 2a of the outer pipe 2, the end edge 3 on one side and the end edge 4 on the other side in the circumferential direction are fixed by, for example, spot welding or the like, so that the state of the entrainment pipe is Maintained.

When the unjoined portion 2 a is joined, the outer pipe 2 has a pipe shape having an outer diameter equivalent to the inner diameter of the existing pipe line 100.
For joining, for example, arc welding or friction stir welding is used.

  The inner pipe 12 is a steel pipe centering on the axis O2 like the outer pipe 2, and is a winding pipe. Further, the outer surface 15 is a painted surface 16, and the inner surface 17 is an unpainted surface 18 in a circumferential region where the unwrapped portion 12 a is wound. In the region other than the region in the circumferential direction in which the unjoined portion 12 a is wound, the inner surface 17 is painted in the same manner as the outer surface 15.

In the inner pipe 12, when the unjoined portion 12 a is joined by arc welding, friction stir welding, or the like, the inner pipe 12 has the same size as the inner diameter of the existing pipe line 100 and has the same diameter as the outer pipe 2.
On the other hand, in a state in which the unbonded portion 12a is not bonded and the end edge 13 on one side is wound around the end edge 14 on the other side, the inner tube 12 is more entangled than the outer tube 2, that is, The length dimension of the circumferential direction in which the edge part 14 of the other side is wound is large.

  In the inner tube 12 and the outer tube 2, the inner tube 12 is inserted and disposed inside the outer tube 2 with the unjoined portions 2 a and 12 a positioned at the lower portion. Thereby, the pipe material 1 of the double pipe structure is formed in a state where the unjoined portions 2a and 12a are overlapped.

  Further, as shown in FIG. 3, the dimension of the inner tube 12 in the axis O2 direction is smaller than the dimension of the outer tube 2 in the axis O1 direction, and the inner tube 12 is inserted inside the outer tube 2. In this state, the inner tube 12 does not protrude from the outer tube 2 in the direction of the axis O1 (O2) and is accommodated inside the outer tube 2.

  The band-shaped member 20 is, for example, a band steel that is disposed on the non-painted surface 8 of the outer tube 2, that is, the end edge 3 on one side in the circumferential direction and extends along the axis O <b> 1 of the outer tube 2. In the present embodiment, the belt-like members 20 are arranged at equal intervals in the circumferential direction and are spaced apart from each other, and extend over the entire area of the outer tube 2 in the axis O1 direction. An unjoined portion 12 a of the inner tube 12, that is, an end edge 14 on the other side in the circumferential direction is placed on the belt-like member 20.

Further, as shown in FIG. 3, the buffer member 21 is inserted and installed so as to fill the gap between the outer tube 2 and the inner tube 12 at the positions of both end portions in the direction of the axis O <b> 2 of the inner tube 12. For example, a member made of resin or the like.
In the present embodiment, the buffer member 21 includes an upper portion of the outer tube 2 and the inner tube 12 and two middle positions in the height direction (vertical direction) of the outer tube 2 and the inner tube 12. The outer pipe 2 and the inner pipe 12 are spaced apart from each other in a total of three locations.
The size of the buffer member 21 can be adjusted as appropriate according to the size of the gap between the outer tube 2 and the inner tube 12.

Next, with reference to FIG. 4, the procedure of the manufacturing method of the newly installed pipe line 200 is demonstrated.
First, the pipe material preparation step S1 is executed. That is, the belt-like member 20 is disposed on the inner surface of the unjoined portion 2a of the outer tube 2, and the inner tube 12 is slid on the belt-like member 20 so that the inner tube 12 is positioned on one side in the direction of the axis O1 of the outer tube 2. To the inside of the outer tube 2. Thereafter, the buffer member 21 is pushed between the outer tube 2 and the inner tube 12 from both sides of the axis O <b> 1 of the outer tube 2. In this way, the tube material 1 is prepared.

  Next, the pipe material insertion step S2 is executed. That is, as shown to Fig.1 (a), the pipe material 1 prepared by pipe material preparation process S1 is inserted in the inside of the existing pipe line 100 through a shaft. The pipe material 1 can travel in the existing pipe line 100 by a transport carriage 110 that supports the outer pipe 2 from below. The transport cart 110 may travel by using a wire and a winch (not shown), or the transport cart 110 itself may include a power source.

  Thereafter, an extraction step S3 is performed. That is, as shown in FIG. 1B, after the pipe material 1 is arranged at a predetermined position in the existing pipe line 100, the inner pipe 12 is slid on the belt-like member 20 from the outer pipe 2. Take out.

  Next, joining process S4 is performed. That is, the unjoined portion 2a of the outer tube 2 is joined, and the unjoined portion 12a of the inner tube 12 is joined, so that each of the outer tube 2 and the inner tube 12 is formed into a tube shape.

  And matching process S5 is performed. That is, the outer tube 2 and the inner tube 12 are abutted so that the respective axes O1 and O2 coincide with each other, and circumferential joining is performed.

  And the pipe material 1 of such a double pipe structure is sequentially inserted in the existing pipe line 100 from the shaft 105, and about each pipe material 1, said pipe material insertion process S2, extraction process S3, joining process S4, butting process While repeating S5, the pipe material 1 is faced | matched and circumferential direction joining is performed, and the newly installed pipeline 200 is constructed | assembled.

  According to such a manufacturing method of the new pipe 200, when the new pipe 200 is built in the existing pipe 100, the inner pipe is placed in the pipe material 1 that is the material of the new pipe 200, that is, the outer pipe 2. It is possible to insert the one inserted 12 into the existing pipe line 100. Therefore, the outer tube 2 and the inner tube 12 can be simultaneously transported and inserted into the existing conduit 100 without using a special transport device or the like. Therefore, compared with the case where the outer pipe 2 and the inner pipe 12 are individually inserted into the existing pipe line 100, the labor required for transporting the pipe material 1 can be reduced.

  Furthermore, since the entrainment tube is used for the inner tube 12, it is possible to insert the inner tube 12 having the same diameter as that of the outer tube 2 inside the outer tube 2. In such a case, the labor required for transportation can be further reduced.

  And in this embodiment, since the entrainment pipe | tube is used also for the outer tube | pipe 2, the common use of the product of the outer tube | pipe 2 and the inner tube | pipe 12 can be aimed at. Moreover, the operation | work in joining process S4 which joins the unjoined parts 2a and 12a of each of the outer tube 2 and the inner tube 12 can be made common. The production efficiency of the new pipeline 200 can be further improved.

  Moreover, by providing the strip-shaped member 20 on the tube material 1, the non-painted surface 8 of the inner surface 7 of the outer tube 2 and the painted surface 16 of the inner tube 12 are not in direct contact. The peeling of the paint can be suppressed. Therefore, painting repair or the like is not required, and the new pipeline 200 can be constructed more efficiently.

  Furthermore, by providing the buffer member 21 on the tube material 1, it is possible to suppress the outer tube 2 and the inner tube 12 from coming into direct contact. Further, by providing the buffer member 21 between the outer tube 2 and the inner tube 12 without any gap, the relative displacement between the outer tube 2 and the inner tube 12 during the transportation of the tube material 1 can be restricted, and the transportation is easy. In addition, the outer tube 2 and the inner tube 12 can be prevented from being damaged. Therefore, the reliability as a product of the newly installed pipeline 200 can be improved.

  Furthermore, the inner tube 12 is accommodated in the outer tube 2 because the size of the inner tube 12 in the direction of the axis O2 is smaller than the size of the outer tube 2 in the direction of the axis O1. For this reason, even if there is a step or the like in the existing pipe line 100, it is possible to prevent the inner pipe 12 from being caught by such a step when the pipe material 1 is transported and hindering the transport work of the pipe material 1 from occurring. it can. Therefore, the tube material 1 can be transported more easily.

  According to the manufacturing method of the new pipe line 200 of the present embodiment, the new pipe line 200 can be efficiently constructed by a simple method by using the pipe material 1 in which the inner pipe 12 is inserted inside the outer pipe 2.

As mentioned above, although embodiment of the manufacturing method of the newly established pipe line of this invention was described, this invention is not limited to the structure shown by the above-mentioned embodiment, It changes within the range which does not deviate from the meaning of this invention. Can do.
For example, the outer tube 2 does not necessarily have to be an entrainment tube, and may be a normal steel tube. Moreover, the outer tube 2 and the inner tube 12 are not limited to those made of steel.

  Moreover, the strip | belt-shaped member 20 does not need to be a strip steel. That is, it may be made of a material such as resin instead of steel, and the material is not limited. Moreover, the strip | belt-shaped member 20 does not need to extend over the whole region of the direction of the axis O1, and a plurality may be provided at intervals in the direction of the axis O1.

  Moreover, in the pipe material 1, it is not restricted to the case where the number of the inner pipes 12 is one, and the inner pipes 12 that are further entrained pipes may be further provided inside the inner pipe 12. In this case, it is possible to transport more materials (the outer pipe 2 and the inner pipe 12) of the new pipe line 200 at the same time by one transport, and transport all materials necessary for the construction of the new pipe line 200. Can be shortened, that is, the time required for the tube material insertion step S2. However, when the inner pipes 12 are multiplexed in this way, the take-out process S3 takes time, so the number of the inner pipes 12 is determined in consideration of the man-hours in the pipe material insertion process S2 and the take-out process S3. Is preferred. Therefore, in the case where only one inner tube 12 is provided inside the outer tube 2 as in the above-described embodiment, the extraction step S3 does not take time compared to the case where multiple inner tubes 12 are provided. Therefore, it can be said that there is a merit in this respect.

DESCRIPTION OF SYMBOLS 1 ... Tube material 2 ... Outer tube 2a ... Unjoined part 3 ... One edge part 4 ... The other edge part 5 ... Outer surface 6 ... Painted surface 7 ... Inner surface 8 ... Unpainted surface 12 ... Inner tube 12a ... Unjoined portion 13 ... end edge 14 on one side ... edge 15 on the other side ... outer surface 16 ... painted surface 17 ... inner surface 18 ... unpainted surface 20 ... strip-shaped member 21 ... buffer member 100 ... existing pipe line 105 ... Shaft 110 ... Conveyor carriage 200 ... New pipeline U ... Ground SF ... Ground surface O1 ... Axis line O2 ... Axis line S1 ... Pipe material preparation step S2 ... Pipe material insertion step S3 ... Take out step S4 ... Join step S5 ... Matching step

Claims (10)

A method of manufacturing a new pipeline by a pipe-in-pipe method of inserting a pipe material into an existing pipeline and constructing a new pipeline in the existing pipeline,
An inner tube, which is a winding tube in which a part in the circumferential direction is unjoined and an end edge on one side in the circumferential direction is wound inside an end edge on the other side in the unjoined portion, A tube material preparation step of preparing the tube material composed of the outer tube and the inner tube by being inserted inside;
A pipe material insertion step of inserting the pipe material inside the existing pipe line;
Inside the existing pipeline, taking out the inner tube from the outer tube,
A joining step of joining the unjoined portion of the inner pipe taken out from the outer pipe;
A butting process in which the outer tube and the inner tube are butted so that the respective axes coincide with each other, and circumferential joining is performed,
A method for manufacturing a new pipeline characterized by comprising:   In the pipe preparation step, as the outer pipe, a part in the circumferential direction is unjoined, and an end edge on one side in the circumferential direction is wound inside the end edge on the other side in the unjoined part. The method for manufacturing a new pipeline according to claim 1, wherein an entraining pipe is used. In the tube material preparation step, using the entrainment tube in which the inner surface of the unjoined portion is an unpainted surface as the outer tube,
Using the entrainment tube whose outer surface is a painted surface as the inner tube,
3. The new installation according to claim 2, wherein a strip-shaped member extending in the axial direction of the outer tube is disposed on the unpainted surface, and the tubular material is prepared by placing the inner tube on the strip-shaped member. A method of manufacturing a pipeline.   In the said pipe material preparation process, what provided the buffer member between the said outer pipe and the said inner pipe is prepared as said pipe material, The newly installed pipe as described in any one of Claim 1 to 3 characterized by the above-mentioned. Road manufacturing method.   5. The tube material preparing step includes preparing the tube material having a smaller dimension in the axial direction of the inner tube than in the axial direction of the outer tube. The manufacturing method of the new installation pipe | line as described in any one of these. A pipe material that is inserted into an existing pipeline and is used for a pipe-in-pipe construction method for constructing a new pipeline in the existing pipeline,
An inner pipe that is a part of the circumferential direction that is unjoined, and an end part on one side of the circumferential direction in the unjoined part is wound inside the end part on the other side;
An outer tube containing the inner tube inside;
A pipe material characterized by comprising:   The outer tube is a winding tube in which a part in the circumferential direction is unjoined, and an end edge part on one side in the circumferential direction is wound inside an end edge part on the other side in the unjoined part. The tube material according to claim 6, wherein the tube material is characterized in that: The outer tube has an unpainted surface on the inner surface of the unbonded portion,
The inner tube has a painted surface on the outer surface,
The pipe member according to claim 7, further comprising a belt-like member that is disposed on the non-painted surface and extends in an axial direction of the outer tube and on which the inner tube is placed.   The pipe member according to any one of claims 6 to 8, further comprising a buffer member provided between the outer tube and the inner tube.   The pipe material according to any one of claims 6 to 9, wherein a dimension in the axial direction of the inner pipe is smaller than a dimension in the axial direction of the outer pipe.

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