TWI628374B - Pipe structure and boiler system - Google Patents

Abstract

The present invention provides a piping structure 1 having a piping 2 that is fixed to a supporting structure 14 and that connects a first device 11 to a second device that is not supported by an anti-shock device, the support structure 14 having The support steel frame 16 of the first device 11 and the anti-vibration device 17 supporting the support steel frame 16 are supported; and the pipe structure 1 includes a pipe 2 and a deformation absorbing portion 3 provided in the pipe 2.

Description

Piping structure and boiler system

The present invention relates to piping construction and boiler systems. The present application claims priority based on Japanese Patent Application No. 2016-079791, filed on Jan.

A large-scale boiler for a coal-fired boiler for power generation and a heavy-duty oil-fired boiler is generally supported by a supporting steel frame supporting a structure together with an attached machine including a denitration device and an air heater. As a support structure for a boiler, an anti-vibration device which is formed by laminating rubber or the like and supports a steel frame is known. Patent Document 1 describes an anti-shock device that reduces the seismic force acting. In the anti-vibration device, the anti-vibration characteristics are set according to the magnitude of the horizontal reaction force generated by the columns constituting the support steel frame. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. 2015-121045

[Problems to be Solved by the Invention] However, the boiler is connected to, for example, a piping for supplying high-temperature and high-pressure steam to equipment such as a turbine. When the boiler is supported by the support structure having the anti-vibration device, the displacement in the horizontal direction of the support steel frame supported by the anti-vibration device becomes large, so that the piping between the piping on the boiler side and the piping on the turbine side is generated. Large deformation. In order to absorb such a deformation, a structure in which deformation is allowed by using a universal joint or the like is known. However, if the fluid flowing through the pipe is at a high pressure, there is a possibility that liquid leakage occurs. An object of the present invention is to provide a piping structure and a boiler system which can absorb the piping when the relative position between the first device supported by the anti-vibration device and the second device not supported by the anti-vibration device greatly changes. The deformation. [Technical means for solving the problem] According to a first aspect of the present invention, a piping structure includes: a pipe fixed to a support structure having a support steel frame supporting the first device and a shockproof support supporting the support steel frame In the device, the first device is connected to a second device that is not supported by the anti-vibration device, and the pipe structure includes the pipe and a deformation absorbing portion provided in the pipe. According to this configuration, even when the relative position between the first device and the second device largely fluctuates due to an earthquake, the deformation of the pipe structure can be absorbed by the deformation absorbing portion. In the piping structure, the pipe has a first pipe on the first device side and a second pipe on the second device side, and the deformation absorbing portion preferably has a first intersecting pipe from an end portion of the first pipe a second intersecting pipe extending from an end of the second pipe to a direction intersecting the second pipe; and a connecting pipe connecting the end of the first intersecting pipe The end of the second cross pipe is connected to the above. According to this configuration, deformation of the pipe can be absorbed by bending deformation and distortion of each pipe. In the piping structure, an angle formed by the first pipe and the first intersecting pipe, an angle formed by the first intersecting pipe and the connecting pipe, an angle formed by the connecting pipe and the second intersecting pipe, and the above The angle formed by the second intersecting pipe and the second pipe is preferably a right angle. According to this configuration, the deformation absorbing portion can be formed compactly. In the piping structure, an angle formed by the first pipe and the first intersecting pipe, and an angle formed by the second intersecting pipe and the second pipe are obtuse, and the connecting pipe may be along the first pipe And extending in the direction of the second pipe. According to this configuration, the pressure loss of the fluid flowing through the pipe can be reduced. In the piping structure, the pipe and the first intersecting pipe, the first intersecting pipe and the connecting pipe, the connecting pipe and the second intersecting pipe, and the second intersecting pipe are connected to the pipe by an elbow, At least one of the elbows preferably exhibits a lower rigidity than the above-described piping. According to this configuration, the deformation absorbing portion can be formed more compactly. According to a second aspect of the present invention, a boiler system has: a support steel frame that supports a first device; a support structure that has an anti-vibration device that supports the support steel frame; and a second device that is not supported by the anti-vibration device; And the piping structure, wherein the piping includes: an upper and lower pipe extending in a vertical direction; and a horizontal pipe extending in a horizontal direction, wherein the deformation absorbing portion is provided at a connection portion between the upper and lower pipes and the horizontal pipe nearby. In the above boiler system, the gap between the support steel frame and the pipe may be set to about 1.0 to 1.5 times the deformation amount of the pipe estimated based on the analysis. According to this configuration, the deformation of the earthquake can be allowed, and even if the piping is deformed to the maximum extent, the piping can be surely prevented from coming into contact with the support steel frame. In the above boiler system, a buffer device may be provided at least one of a maximum deformation portion of the pipe determined by the analysis and a corresponding portion of the maximum deformation portion of the support steel frame. According to this configuration, even when an accidental earthquake occurs and the pipe is brought into contact with the support steel frame, the damage of the pipe can be prevented. [Effects of the Invention] According to the present invention, even when the relative position between the first device and the second device largely fluctuates due to an earthquake, the deformation of the pipe structure can be absorbed by the deformation absorbing portion.

[First Embodiment] Hereinafter, a boiler system according to a first embodiment of the present invention will be described in detail with reference to the drawings. As shown in Fig. 1, the boiler system 10 of the present embodiment includes a boiler 11 (first device), a turbine 12 (second device), and a piping structure 1 having a pipe 2 connecting the boiler 11 and the turbine 12. The boiler 11 has a boiler body 13 and a boiler support structure 14 that supports the boiler body 13. The boiler support structure 14 is attached to the foundation 15, and has a support steel frame 16 and a plurality of anti-shock devices 17 supporting the support steel frame 16. The support steel frame 16 is configured by combining a plurality of columns 18 extending in the vertical direction, a plurality of beams 19 extending in the horizontal direction, and a plurality of vertical columns 20. The boiler support structure 14 is erected on the foundation 15 via a column leg 18a which is an end portion of the column 18 constituting the support steel frame 16. The boiler support structure 14 suspends the boiler body 13 from the top of the support steel frame 16 via a plurality of suspension bars 22 fixed to the uppermost beam 19 so as not to restrict thermal expansion during operation. In order to restrict the horizontal displacement of the boiler body 13 in the boiler support structure 14, a bracket 23 that is placed in the horizontal direction is interposed between the boiler body 13 and the column 18 located at the outermost periphery of the support steel frame 16. The boiler support structure 14 is provided with an anti-shock device 17 between the base of each of the legs 18a and the foundation 15. The anti-vibration device 17 is a device that is formed by laminating rubber or the like to separate the foundation 15 from the support steel frame 16, and when the earthquake occurs, the vibration period of the support steel frame 16 is long-cycled, thereby reducing the cause. The inertial force caused by the earthquake reduces the input energy of the earthquake to support the steel frame 16. As the anti-vibration device 17, a device using laminated rubber, a device using a sliding material, a device using rolling support, or the like can be used. The anti-vibration device 17 may also have a damper such as a hydraulic damper. The piping structure 1 has a piping 2 that connects the boiler 11 and the turbine 12 that is not supported by the anti-vibration device 17. The piping 2 extends along the column 18 of the support steel frame 16. The pipe 2 is fixed to the column 18 of the support steel frame 16 by a pipe fixing fixture 24. The piping 2 is circulated, for example, at a high temperature (for example, above about 550 ° C) and at a high pressure (for example, in excess of about 15 MPa). As shown in FIG. 2, the piping structure 1 has the piping 2, and the deformation absorption part 3 provided in the piping 2. The deformation absorbing portion 3 absorbs a portion generated by deformation of the pipe 2 when an earthquake occurs. In the following description, the vertical direction is the Z direction, the horizontal direction orthogonal to one of the Z directions is the X direction, and the horizontal direction orthogonal to the Z direction and the X direction is the Y direction. The pipe 2 has a horizontal pipe 25 extending in the horizontal direction and an upper and lower pipe 26 extending in the vertical direction. The horizontal pipe 25 is disposed at a position close to the anti-vibration device 17 in the vertical direction, and is fixed to the foundation 15 (see FIG. 1 ) or the turbine 12 . The upper and lower pipes 26 are fixed to the support steel frame 16 via the pipe fixing fixtures 24 . The upper and lower pipes 26 and the horizontal pipes 25 are connected to each other under the pipe fixture 24 . The upper and lower pipes 26 are supported by the anti-shock device 17 via the pipe fixture 24 and the support steel frame 16. When an earthquake occurs, the upper and lower pipes 26 move largely in the horizontal direction (at least one of the X direction and the Y direction), but the horizontal pipe 25 hardly moves in the horizontal direction from the upper and lower pipes 26. The deformation absorbing portion 3 of the present embodiment is provided below the pipe fixture 24 of the upper and lower pipes 26. As shown in FIG. 3, the piping structure 1 has a pipe 2 having a cylindrical shape and a deformation absorbing portion 3 provided in the pipe 2. In the present embodiment, the pipe 2 is an upper and lower pipe 26 (see Fig. 2). The pipe 2 has a first pipe 2a on the boiler 11 side and a second pipe 2b on the turbine 12 side. The first pipe 2a and the second pipe 2b are disposed on the same line and extend in the vertical direction. The first pipe 2a is disposed above the second pipe 2b. The deformation absorbing portion 3 is provided between the first pipe 2a and the second pipe 2b. The deformation absorbing portion 3 has a first intersecting pipe 5 extending from an end portion (lower end) of the first pipe 2a in a direction intersecting the first pipe 2a, and a second intersecting pipe 6 from an end portion of the second pipe 2b. (upper end) extends in a direction intersecting the second pipe 2b; and a connecting pipe 7 that connects the end of the first intersecting pipe 5 and the end of the second intersecting pipe 6. The piping 2 and the piping 2 are connected by the elbow 8. The elbow 8 is a curved cylindrical member, and the elbow 8 of the present embodiment can be formed by connecting the pipes at an angle of 90° to each other. In the deformation absorbing portion 3 of the present embodiment, the angle θ1 between the first pipe 2a and the first intersecting pipe 5, the angle θ2 formed by the first intersecting pipe 5 and the connecting pipe 7, the connecting pipe 7 and the second intersecting pipe 6 The angle θ3 formed and the angle θ4 formed by the second intersecting pipe 6 and the second pipe 2b are substantially right angles (90°). The piping 2 and the elbow 8 are made of, for example, a material that can be used at a temperature exceeding 550°. Further, the dimensions of the piping 2 and the elbow 8 are selected to withstand a pressure of, for example, a pressure exceeding 15 MPa. Next, the action of the deformation absorbing portion 3 of the present embodiment will be described. When an earthquake occurs, the support steel frame 16 to which the pipe 2 is fixed moves in the X direction and the Y direction. As shown in Fig. 4, when the support steel frame 16 (see Fig. 2) moves in the X direction, the first pipe 2a moves in the X direction. On the other hand, the second pipe 2b hardly moves. The displacement of the first pipe 2a in the X direction is absorbed by the deformation absorbing portion 3. The displacement of the first pipe 2a in the X direction is absorbed by the first pipe 2a, the second pipe 2b, and the connecting pipe 7, and is deformed by twisting deformation of the first intersecting pipe 5 and the second intersecting pipe 6. As shown in Fig. 5, when the support steel frame 16 (see Fig. 2) moves in the Y direction, the first pipe 2a moves in the Y direction. On the other hand, the second pipe 2b hardly moves. The displacement of the first pipe 2a in the Y direction is absorbed by the deformation absorbing portion 3. The displacement of the first pipe 2a in the Y direction is absorbed by the bending deformation of the first pipe 2a, the second pipe 2b, the first intersecting pipe 5, the second intersecting pipe 6, the connecting pipe 7, and the elbow 8. In other words, the deformation absorbing portion 3 absorbs and shifts in two directions in the horizontal direction at the time of the earthquake by bending deformation and distortion of the pipe 2, bending deformation of the elbow pipe 8, and the like. According to the above-described embodiment, when the deformation absorbing portion 3 is provided in the piping structure 1, even when the relative position between the boiler 11 supported by the anti-vibration device 17 and the turbine 12 not supported by the anti-vibration device 17 greatly changes due to the earthquake, It is also possible to absorb the deformation of the pipe 2 and allow the deformation amount of the pipe 2. In addition, the deformation absorbing portion 3 is configured to have the following piping structure, and the deformation of the pipe 2 is caused by the bending deformation and the distortion of the respective pipes: the first intersecting pipe 5, the first pipe An end portion of 2a extends in a direction intersecting the first pipe 2a; a second intersecting pipe 6 extends from an end portion of the second pipe 2b in a direction intersecting the second pipe 2b; and a connecting pipe 7 which is connected first The end of the intersecting pipe 5 and the end of the second intersecting pipe 6 are provided. Moreover, the angle θ1 formed by the first pipe 2a and the first intersecting pipe 5, the angle θ2 formed by the first intersecting pipe 5 and the connecting pipe 7, and the angle θ3 formed by the connecting pipe 7 and the second intersecting pipe 6 are formed. The angle θ4 formed by the second intersecting pipe 6 and the second pipe 2b is set to be substantially a right angle, and the deformation absorbing portion 3 can be formed compactly. Moreover, the piping structure 1 of this embodiment is comprised only by the piping 2 and the elbow 8. Thereby, leakage of steam can be prevented as compared with a structure that absorbs deformation using a universal joint or the like. [Second Embodiment] Hereinafter, a piping structure 1 according to a second embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, the differences from the first embodiment will be mainly described, and the description of the same portions will be omitted. As shown in Fig. 6, the deformation absorbing portion 3 of the present embodiment is provided in the vicinity of the connection portion of the horizontal pipe 25 and the upper and lower pipes 26. The first pipe 2a and the second pipe 2b of the present embodiment extend in the horizontal direction. In other words, the deformation absorbing portion 3 may be provided not only to the upper and lower pipes 26 but also to the connection portion with the upper and lower pipes 26, and may be provided in the horizontal pipe 25. As shown in Fig. 7, when the support steel frame 16 (see Fig. 2) moves in the X direction, the first pipe 2a moves in the X direction. On the other hand, the second pipe 2b hardly moves. The displacement of the first pipe 2a in the X direction is absorbed by the deformation absorbing portion 3. The displacement of the first pipe 2a in the X direction is caused by the axial deformation of the first pipe 2a and the second pipe 2b, and the bending of the first intersecting pipe 5, the second intersecting pipe 6, the connecting pipe 7, and the elbow 8 absorb. The movement of the support steel frame 16 (refer to Fig. 2) in the Y direction is absorbed by the same action as that shown in Fig. 5. According to the above-described embodiment, when the deformation absorbing portion 3 is provided in the pipe 2 extending in the horizontal direction, when the relative position between the boiler 11 and the turbine 12 largely fluctuates due to an earthquake, the pipe 2 can be absorbed. The deformation is made and the amount of deformation of the pipe 2 is allowed. [Third Embodiment] Hereinafter, a piping structure 1 according to a third embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, the differences from the first embodiment will be mainly described, and the description of the same portions will be omitted. As shown in Fig. 8, the deformation absorbing portion 3C of the present embodiment has an angle θ1 between the first pipe 2a and the first intersecting pipe 5, an angle θ2 between the first intersecting pipe 5 and the connecting pipe 7, and a connecting pipe 7 and The angle θ3 formed by the second intersecting pipe 6 and the angle θ4 formed by the second intersecting pipe 6 and the second pipe 2b are respectively obtuse angles (for example, about 120°). The elbow 8 has a shape corresponding to the angle. The connection pipe 7 extends in the direction along the first pipe 2a and the second pipe 2b. That is, the first pipe 2a, the second pipe 2b, and the connecting pipe 7 are parallel to each other. According to the above embodiment, the pressure loss of the steam flowing through the pipe 2 can be reduced. Further, in the above embodiment, the configuration in which the respective pipes 2 are connected via the elbow pipe 8 is not limited thereto. In other words, the elbow 8 may not be used, and the piping 2 and the deformation absorbing portion 3 may have no joint structure. Thereby, the respective pipes 2 can be connected more smoothly, and the pressure loss of the steam can be further reduced. [Fourth embodiment] Hereinafter, a pipe structure 1 according to a fourth embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, the differences from the first embodiment will be mainly described, and the description of the same portions will be omitted. As shown in Fig. 9, the length L2 of the first intersecting pipe 5, the second intersecting pipe 6, and the connecting pipe 7 of the deformation absorbing portion 3D of the present embodiment is shorter than the first cross of the deforming absorbing portion 3 of the first embodiment. The length L1 of the pipe 5, the second intersecting pipe 6, and the connecting pipe 7 (see Fig. 3). The elbow pipe 8 of the present embodiment is formed such that the display rigidity is lower than that of the first intersecting pipe 5, the second intersecting pipe 6, and the connecting pipe 7. The elbow pipe 8 of the present embodiment is thinner than the first intersecting pipe 5, the second intersecting pipe 6, and the connecting pipe 7. The elbow 8 of the present embodiment is less rigid than the elbow 8 of the first embodiment. According to the above-described embodiment, the displacement amount D (see also FIG. 5) which is the same as that of the deformation absorbing portion 3 of the first embodiment can be secured, and the deformation absorbing portion can be formed in a smaller size. Further, the method of reducing the rigidity of the elbow 8 is not limited thereto. For example, the material of the elbow 8 can be changed to a more flexible material. Further, it is also possible to reduce only the diameter of the portion of the elbow 8. Furthermore, the elastoplastic property is also included, and it is also possible to exhibit a property of lower rigidity than the elbow 8 of the first embodiment. Further, the size of the deformation absorbing portion 3, that is, the lengths of the first intersecting pipe 5, the second intersecting pipe 6, and the connecting pipe 7, can be based on the amount of deformation of the pipe 2 estimated based on seismic response analysis or the like, or the scale of the boiler system 10, and the like. And change it as appropriate. In other words, as the length of the pipe 2 constituting the deformation absorbing portion 3 is increased, the twist deformation and the bending deformation can be increased, so that the allowable deformation amount can be increased. Further, a plurality of deformation absorbing portions 3 may be provided in the piping structure 1. Further, the direction in which the deformation absorbing portion 3 protrudes with respect to the pipe 2 may be either direction. The deformation absorbing portion 3 shown in Fig. 2 protrudes in the direction along the surface of the support steel frame 16, but the deformation absorbing portion 3 may be protruded toward the inner side of the support steel frame 16, for example. Further, two deformation absorbing portions 3 may be provided so that the protruding directions of the respective deformation absorbing portions 3 are opposite. In other words, the intersecting pipes 5 and 6 of one of the two deformation absorbing portions 3 may protrude in one direction substantially orthogonal to the pipe 2, and the other deformation of the two deformation absorbing portions 3 may be absorbed. The intersecting pipes 5 and 6 of the portion 3 protrude in a direction different from the direction in which the pipe 2 is substantially orthogonal. [Fifth Embodiment] Hereinafter, a piping structure 1 according to a fifth embodiment of the present invention will be described in detail with reference to the drawings. In the piping structure 1 of the boiler system 10 of the present embodiment, the gap C between the support steel frame 16 and the pipe 2 is set to be about 1.0 to 1.5 times the deformation amount D2 of the pipe 2 estimated based on the seismic response analysis or the like. As shown in Fig. 10, the deformation of the pipe 2 is estimated by a seismic response analysis or the like as indicated by a broken line. The pipe fixing fixture 24 of the present embodiment is formed so that the gap C between the pipe 2 and the supporting steel frame 16 (column 18) is about 1.0 to 1.5 times the deformation amount D2 of the pipe 2 estimated by seismic response analysis or the like. According to the above embodiment, the deformation of the pipe 2 in the horizontal direction due to the earthquake can be allowed, and when the pipe 2 is deformed to the maximum in the X direction of Fig. 10, the contact between the pipe 2 and the support steel frame 16 can be surely avoided. [Sixth embodiment] Hereinafter, a pipe structure 1 according to a sixth embodiment of the present invention will be described in detail with reference to the drawings. In the present embodiment, the differences from the fifth embodiment will be mainly described, and the description of the same portions will be omitted. As shown in Fig. 11, the boiler system 10 of the present embodiment is provided with a buffer device 28 on a column 18 supporting the steel frame 16. The cushioning device 28 is formed, for example, by a square-shaped rubber or the like. The buffer device 28 is provided at a corresponding portion of the largest deformation portion M of the pipe 2 determined by seismic response analysis or the like. According to the above embodiment, even when an accidental earthquake occurs and the pipe 2 comes into contact with the support steel frame 16, the damage of the pipe 2 can be prevented. Further, by using the high-attenuation rubber having the damping mechanism as the buffering means 28, the energy at the time of contact can be more absorbed. Further, the shock absorber 28 may be provided on the side of the pipe 2 (the largest deformation portion M of the pipe 2). Further, as shown in the first example of Fig. 12, a viscous attenuating mechanism such as a hydraulic damper 29 may be provided in parallel as the damper device 28. Also shown in Fig. 12 is a cushioning device 28 formed of rubber or the like. However, if there is a margin in the gap C between the pipe 2 and the supporting steel frame 16, the cushioning device 28 may be omitted. Further, as shown in the second example of FIG. 13, a hysteresis damping mechanism such as a steel damper 30 (such as a honeycomb damper) may be provided as the damper device 28. At this time, it is preferable to provide the load transmitting member 31 that transmits the load to the steel damper 30 on the side of the pipe 2 . The details of the embodiments of the present invention have been described above, but various modifications can be added without departing from the spirit of the invention. For example, in the above embodiment, the pipe 2 extending between the boiler and the turbine is provided with the deformation absorbing portion 3, but the invention is not limited thereto. In other words, the piping structure of the present invention may be a pipe that connects a first device supported by a support structure having an anti-vibration device and a second device that is not supported by the anti-vibration device. [Industrial Applicability] According to the present invention, even when the relative position between the first device and the second device largely fluctuates due to an earthquake, the deformation of the pipe structure can be absorbed by the deformation absorbing portion.

1‧‧‧Pipe construction

2‧‧‧Pipe

2a‧‧‧First piping

2b‧‧‧Second piping

3, 3C, 3D‧‧‧ deformation absorption department

5‧‧‧First cross piping

6‧‧‧Second cross piping

7‧‧‧Connecting piping

8‧‧‧ elbow

10‧‧‧Boiler system

11‧‧‧Boiler (first equipment)

12‧‧‧ Turbine (second equipment)

13‧‧‧Boiler body

14‧‧‧Boiler Support Structure

15‧‧‧ Foundation

16‧‧‧Support steel frame

17‧‧‧Anti-shock device

18‧‧‧ column

18a‧‧‧ column foot

19‧‧ ‧ beams

20‧‧‧ vertical pillar

22‧‧‧ hanging stick

23‧‧‧ bracket

24‧‧‧Pipe fittings

25‧‧‧Horizontal piping

26‧‧‧Up and down piping

28‧‧‧buffering device

29‧‧‧Hydraulic damper

30‧‧‧Steel dampers

31‧‧‧Load transfer member

C‧‧‧ gap

D‧‧‧ shift amount

L1, L2‧‧‧ length

M‧‧‧Maximum deformation department

X‧‧‧ direction

Y‧‧‧ direction

Z‧‧‧ direction

Fig. 1 is a schematic configuration diagram of a boiler system according to a first embodiment of the present invention. Fig. 2 is a perspective view of a boiler according to a first embodiment of the present invention. Fig. 3 is a perspective view showing a piping structure according to a first embodiment of the present invention. Fig. 4 is a side view showing the action of the piping structure according to the first embodiment of the present invention, showing a state in which the support steel frame is moved in the X direction. Fig. 5 is a side view showing the action of the piping structure according to the first embodiment of the present invention, showing a state in which the support steel frame is moved in the Y direction. Figure 6 is a perspective view of a boiler according to a second embodiment of the present invention. Fig. 7 is a plan view showing the action of the piping structure according to the second embodiment of the present invention, showing a state in which the support steel frame is moved in the X direction. Fig. 8 is a front view showing a piping structure according to a third embodiment of the present invention. Fig. 9 is a front view showing a piping structure according to a fourth embodiment of the present invention. Fig. 10 is a schematic side view showing a piping structure according to a fifth embodiment of the present invention. Fig. 11 is a schematic side view showing a piping structure according to a sixth embodiment of the present invention. Fig. 12 is a schematic side view showing a piping structure according to a first modification of the sixth embodiment of the present invention. Fig. 13 is a schematic side view showing a piping structure according to a second modification of the sixth embodiment of the present invention.

Claims (6)

A piping structure including a piping fixed to a supporting structure and connecting a first device to a second device not supported by the anti-vibration device, the supporting structure including a supporting steel frame supporting the first device And the above-described anti-vibration device supporting the steel frame; the pipe structure further comprising: a deformation absorbing portion provided in the pipe to absorb deformation generated by the pipe; the pipe comprising: the first pipe on the first device side And the second pipe on the second device side; the deformation absorbing portion includes: a first intersecting pipe extending from an end portion of the first pipe to a direction intersecting the first pipe; and a second intersecting pipe An end of the second pipe extends in a direction intersecting the second pipe, and a connecting pipe that connects an end of the first intersecting pipe and an end of the second intersecting pipe; the pipe and the first cross pipe The first intersecting pipe and the connecting pipe, the connecting pipe, the second intersecting pipe, and the second intersecting pipe; Are connected via piping elbow, the elbow of the above-mentioned at least one of the first cross pipe than the second cross pipe and the connection with a thin wall. The piping structure of claim 1, wherein the first pipe and the first cross pipe are formed a corner formed by the first intersecting pipe and the connecting pipe, an angle formed by the connecting pipe and the second intersecting pipe, and an angle formed by the second intersecting pipe and the second pipe are respectively right angles . The piping structure of claim 1, wherein an angle formed by the first pipe and the first intersecting pipe, and an angle formed by the second intersecting pipe and the second pipe are obtuse angles, and the connecting pipe is along the above-mentioned A pipe and the second pipe extend in the direction of the second pipe. A boiler system comprising: a support steel frame supporting a first device; a support structure including an anti-vibration device supporting the support steel frame; a second device not supported by the anti-vibration device; and claims 1 to 3 The piping structure according to any one of the present invention includes a pipe, the pipe includes an upper pipe extending in a vertical direction, and a horizontal pipe extending in a horizontal direction; and the deformation absorbing portion is provided in a vicinity of a connection portion between the upper pipe and the horizontal pipe . The boiler system according to claim 4, wherein a gap between the support steel frame and the pipe is set to be 1.0 to 1.5 times the deformation amount of the pipe calculated based on the analysis. The boiler system according to claim 5, wherein a buffer device is provided at least one of a maximum deformation portion of the pipe determined by the analysis and a corresponding portion of the maximum deformation portion of the support steel frame.