JP2021123925A - Pipe structure and method of renewing pipe - Google Patents

Abstract

To efficiently renew a drain vertical pipe.SOLUTION: A pipe structure for connecting a first collective joint and a second collective joint 1B on a lower floor side located below the first collective joint, includes: a first vertical pipe member 91 extending downward from the first collective joint; a second vertical pipe member 92 extending upward from the second collective joint 1B; and a renewal joint 20 having a lower end of the first vertical pipe member 91 and an upper end of the second vertical pipe member 92 disposed therein, and connecting the first vertical pipe member 91 and the second vertical pipe member 92. The renewal joint 20 is fitted to the first vertical pipe member 91 and the second vertical pipe member 92 respectively from the outside and can slidably move in a vertical direction. The second vertical pipe member 92 is provided with a protrusion 92t that supports the renewal joint 20 from below.SELECTED DRAWING: Figure 2

Description

The present invention relates to a piping structure and a method for updating piping.

In the drainage system of a multi-story building such as an apartment house, the drainage discharged from the sanitary equipment on each floor is collected from the sanitary equipment on each floor through a horizontal branch pipe into a drainage vertical pipe provided in the pipe shaft. It is designed to drain water into a water channel (see, for example, Patent Document 1). In this way, in the drainage system, joints such as collective joints and leg joints are used to connect the drainage vertical pipes located above and below each other, and the horizontal branch pipes and the drainage vertical pipes on each floor.

Japanese Unexamined Patent Publication No. 2011-006893

By the way, in the drainage system as described above, a renewal joint may be used in order to easily renew the drainage vertical pipe. The drainage vertical pipe is inserted inside the renewal joint, and the drainage vertical pipe can be slid up and down along the drainage vertical pipe. The drainage pipe includes a first pipe extending downward from the first joint and a second pipe extending upward from the second joint located below the first joint. The lower end of the first standing pipe and the upper end of the second standing pipe are connected inside the renewal joint. The renewal joint normally covers the connection portion between the first standing pipe and the second standing pipe. When renewing the drainage vertical pipe, the renewal joint is slid in the vertical direction to expose the connection portion between the first vertical pipe and the second vertical pipe.

By the way, when the renewal joint as described above is used, since the renewal joint can slide and move in the vertical direction, positioning in the vertical direction is difficult, and the renewal work may take time and effort.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a pipe structure and a pipe renewal method capable of efficiently renewing a drainage vertical pipe.

In order to solve the above problems, the present invention proposes the following means.
The piping structure according to the present invention is a piping structure that connects a first joint and a second joint located below the first joint, and is a first that extends downward from the first joint. The standing pipe, the second standing pipe extending upward from the second joint, the lower end of the first standing pipe, and the upper end of the second standing pipe are arranged inside, and the first standing pipe is arranged. A renewal joint for connecting the standing pipe and the second standing pipe is provided, and the renewing joint is fitted into each of the first standing pipe and the second standing pipe from the outside and in the vertical direction. The second vertical pipe is provided with a protrusion that supports the renewal joint from below.

According to such a configuration, the first joint and the second joint are renewed to connect the first standing pipe, the second standing pipe, and the first standing pipe and the second standing pipe. It is connected by a joint. The vertical position of the renewal joint is defined by the protrusion provided on the second vertical pipe. When renewing the first standing pipe and the second standing pipe, the first standing pipe and the second standing pipe can be easily removed by sliding the renewal joint upward. The renewal joint can be easily positioned in the vertical direction by abutting it on the protrusion. Therefore, the drainage pipe can be efficiently renewed.

Further, a plurality of the protrusions may be provided at intervals in the circumferential direction of the second standing pipe.

In this case, by supporting the renewal joint from below on the plurality of protrusions, the renewal joint can be easily positioned along the central axis of the second standing pipe.

Further, the packing arranged between the outer surface of the second standing pipe and the inner surface of the renewal joint is arranged between the protrusion of the second standing pipe and the lower end surface of the renewal joint. A flange assembled with the packing and a bolt for joining the renewal joint and the flange are further provided so that the protrusion is displaced in the circumferential direction with respect to the bolt. May be good.

In this case, by arranging the packing between the outer surface of the second standing pipe and the inner surface of the renewal joint, water stoppage between the second standing pipe and the renewal joint is ensured. Further, the flange assembled with the packing is joined to the renewal joint by bolts. Since the protrusions are displaced in the circumferential direction with respect to the bolts, it is possible to prevent the protrusions from interfering with the bolts.

Further, a third standing pipe sandwiched between the first standing pipe and the second standing pipe may be arranged inside the renewal joint.

In this case, if the third standing pipe is removed with the renewal joint slid upward, the length of the third standing pipe does not interfere with each other. It can be moved up and down by that amount. This makes it possible to easily remove and attach the first standing pipe and the second standing pipe.

The method for renewing a pipe according to the present invention is a method for renewing a pipe structure, in which the renewal joint is slid upward and the renewal joint is separated from the second standing pipe to separate the renewal joint from the second vertical pipe. A step of arranging the whole of the above in the first standing pipe, a step of removing the first standing pipe and the second standing pipe from between the first joint and the second joint, and the above-mentioned A step of attaching a new first standing pipe, a second standing pipe and a renewal joint between the first joint and the second joint, and supporting the renewal joint on the protrusion. To be equipped.

In this case, since the vertical position of the renewal joint can be easily positioned, the drainage vertical pipe can be efficiently renewed.

According to the present invention, the drainage pipe can be efficiently renewed.

It is a side view of the drainage system provided with the piping structure which concerns on one Embodiment of this invention. It is sectional drawing which shows a part of the vertical pipe provided on each floor of the drainage system shown in FIG. It is a plan sectional view of the 2nd vertical pipe member which constitutes the vertical pipe shown in FIG. It is a side view of the 2nd vertical pipe member shown in FIG. It is sectional drawing of the 2nd vertical pipe member shown in FIG. It is a flowchart which shows the flow of the update method of the pipe which concerns on one Embodiment of this invention. It is sectional drawing which shows the state which the renewal joint was slid upward in the method of renewing a pipe which concerns on one Embodiment of this invention. It is sectional drawing which shows the state which the 2nd vertical pipe member was inserted into the collective joint on the lower floor side. It is sectional drawing which shows the state which attached the lower flange ring to the 2nd vertical pipe member. It is a figure which shows the state which attaches the renewal joint to the 2nd vertical pipe member, and connects the 1st vertical pipe member.

Hereinafter, a piping structure and a piping updating method according to an embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, in a drainage system of a building (not shown) having multiple floors such as a condominium, a collective joint 1 is provided on each floor. The collective joint 1 is a joint configured so as to be inserted into the floor slab S. The collective joint 1 mainly includes an upper member 12 and a lower member 14. The collective joint 1 is made of cast iron, resin, or the like.

The upper member 12 is a pipe member that projects upward from the floor slab S when the collective joint 1 is inserted into the floor slab S. The upper member 12 includes a main pipe 2 extending in the vertical direction and a plurality of (three in the present embodiment) branch pipes 3 connected to the outer peripheral surface of the main pipe 2. The axis of each of the three branch pipes 3 extends in the horizontal direction and intersects the axis of the main pipe 2. A horizontal branch pipe 7 for flowing down the drainage discharged from sanitary equipment or the like on each floor is connected to each branch pipe 3.

The lower member 14 is connected to the upper member 12. Specifically, the lower member 14 is a pipe member that is externally fitted to the lower part of the upper member 12. In a state where the collective joint 1 is inserted into the floor slab S, the upper portion 14a of the lower member 14 is embedded inside the floor slab S, and the lower portion 14b of the lower member 14 projects below the floor slab S. A rectifying blade (not shown) may be provided in the pipe of the upper portion 14a of the lower member 14. For example, when the collective joint 1 is made of cast iron, the upper member 12 and the lower member 14 may be integrally formed.

Such a collective joint 1 is inserted through a through hole H formed in a concrete floor slab S interposed between adjacent floors in the vertical direction. A filler such as mortar M is filled between the side wall of the through hole H and the collective joint 1.

Between the collective joints 1 on the floors located above and below each other, there is a vertical pipe 9 that forms a drainage vertical pipe in the pipe shaft and allows the drainage that has flowed down the lateral branch pipe 7 to flow down to the bottom of the drainage system. It is connected. The lower part of the standing pipe 9 (for example, the standing pipe 9A on the upper floor side) is connected to the upper part of the upper member 12 of the collective joint 1 on each floor, and another standing pipe 9 (for example, the lower floor) is connected to the lower part of the lower member 14. The upper part of the side standing pipe 9B) is connected.

In this way, on each floor of the building, a standing pipe 9, an upper floor collective joint (first joint) 1A provided on the upper side of the standing pipe 9, and a lower side of the standing pipe 9 are provided. A lower floor collective joint (second joint) 1B and a horizontal branch pipe 7 connected to the lower floor collective joint 1B are provided. On each floor, the collective joint 1A on the upper floor side and the collective joint 1B on the lower floor side located below the collective joint 1A on the upper floor side are connected by a vertical pipe 9.

As shown in FIGS. 1 and 2, the standing pipes 9 on each floor include a first standing pipe member (first standing pipe) 91, a second standing pipe member (second standing pipe) 92, and a second standing pipe member. The vertical pipe member (third vertical pipe) 93 of 3 and the renewal joint 20 are provided. The first standing pipe member 91, the second standing pipe member 92, the third standing pipe member 93, and the renewal joint 20 are each made of, for example, a steel pipe, a resin pipe, or the like.

The upper end of the first vertical pipe member 91 is flanged to the lower part of the lower member 14 of the collective joint 1A on the upper floor side. The first vertical pipe member 91 extends downward from the collective joint 1A on the upper floor side.
The lower end of the second vertical pipe member 92 is fitted inside the upper part of the upper member 12 of the collective joint 1B on the lower floor side. The second vertical pipe member 92 extends upward from the collective joint 1B on the lower floor side.

As shown in FIGS. 2 to 5, the second standing pipe member 92 is provided with a protrusion 92t. The protrusion 92t projects from the outer surface of the second standing pipe member 92 to the outside in the radial direction of the second standing pipe member 92. A plurality of protrusions 92t are provided at intervals in the circumferential direction of the second vertical pipe member 92. In the present embodiment, a total of three protrusions 92t are provided at equal intervals in the circumferential direction. However, the form of the protrusion 92t is not limited to this form. These plurality of protrusions 92t are formed at the same position in the vertical direction. The plurality of protrusions 92t support the renewal joint 20 described later from below.

As shown in FIG. 2, the third standing pipe member 93 is sandwiched between the first standing pipe member 91 and the second standing pipe member 92. Here, the vertical pipe length of the third standing pipe member 93 is smaller than the pipe lengths of the first standing pipe member 91 and the second standing pipe member 92. In the illustrated example, the pipe length of the third standing pipe member 93 is larger than the pipe length of the portion of the second standing pipe member 92 located below the protrusion 92t. Further, the outer diameters of the first standing pipe member 91, the second standing pipe member 92, and the third standing pipe member 93 have the same dimensions.

The renewal joint 20 has a cylindrical shape extending in the vertical direction, and is provided outside the first vertical pipe member 91, the second vertical pipe member 92, and the third vertical pipe member 93 in the radial direction. In the renewal joint 20, the lower end of the first standing pipe member 91, the entire third standing pipe member 93, and the upper end of the second standing pipe member 92 are arranged inside.

The renewal joint 20 connects the first vertical pipe member 91 and the second vertical pipe member 92. The renewal joint 20 is fitted into each of the first vertical pipe member 91 and the second vertical pipe member 92 from the outside. The renewal joint 20 has an inner diameter larger than the outer diameter of the first standing pipe member 91, the second standing pipe member 92, and the third standing pipe member 93 by a predetermined dimension. As a result, the renewal joint 20 can slide and move in the vertical direction with respect to the first standing pipe member 91, the second standing pipe member 92, and the third standing pipe member 93.

An upper flange portion 20a and a lower flange portion 20b are integrally provided at the upper and lower ends of the renewal joint 20. The upper flange portion 20a and the lower flange portion 20b project radially outward from the outer surface of the renewal joint 20. Bolt insertion holes 20h and 20g are formed in the upper flange portion 20a and the lower flange portion 20b, respectively, at a plurality of locations (for example, three locations) at intervals in the circumferential direction.

A lower flange ring (flange) 23 is provided below the renewal joint 20. The lower flange ring 23 is arranged between the protrusion 92t of the second vertical pipe member 92 and the lower end surface of the renewal joint 20. The lower flange ring 23 has an annular shape, and a second vertical pipe member 92 is inserted inside the lower flange ring 23. The lower flange ring 23 is placed on the protrusion 92t of the second vertical pipe member 92.

The lower flange ring 23 is provided with bolt insertion portions 23b protruding outward in the radial direction at a plurality of locations (for example, three locations) spaced apart from each other in the circumferential direction. The bolt insertion portion 23b is formed with a bolt insertion hole 23h through which a bolt B, which will be described later, can be inserted. As shown in FIG. 3, the bolt insertion portion 23b is arranged at a different position in the circumferential direction with respect to the protrusion 92t formed on the second standing pipe member 92 when the standing pipe 9 is viewed from the vertical direction. .. As a result, the protrusion 92t is displaced in the circumferential direction with respect to the bolt B.

As shown in FIG. 2, the packing 26 is housed in a groove formed in the inner peripheral portion of the upper surface of the lower flange ring 23. The lower portion of the packing 26 is housed in the groove and is assembled to the lower flange ring 23. The upper portion of the packing 26 projects upward from the upper surface of the lower flange ring 23.

The lower flange portion 20b of the renewal joint 20 is placed on such a lower flange ring 23. The upper portion of the packing 26 of the lower flange ring 23 is housed in a groove formed in the inner peripheral portion of the lower surface of the lower flange portion 20b. In this way, the packing 26 is arranged between the outer surface of the second vertical pipe member 92 and the inner surface of the renewal joint 20. The packing 26 is in close contact with the outer surface of the second standing pipe member 92. The lower flange ring 23 and the lower flange portion 20b of the renewal joint 20 are joined by a bolt insertion hole 20g and a bolt B inserted through the 23h.

An upper flange ring 24 is provided on the renewal joint 20. The upper flange ring 24 has an annular shape, and the first standing pipe member 91 is inserted inside the ring. The upper flange ring 24 is formed with bolt insertion holes 24h at a plurality of locations (for example, three locations) spaced apart from each other in the circumferential direction.

An upper packing 27 is assembled to the upper flange ring 24. The upper packing 27 is housed in a groove formed in the inner peripheral portion of the lower surface of the upper flange ring 24. The upper portion of the upper packing 27 is assembled to the upper flange ring 24 by being accommodated in the groove. The lower portion of the upper packing 27 projects downward from the lower surface of the upper flange ring 24.

Such an upper flange ring 24 is placed on the upper flange portion 20a of the renewal joint 20. The lower portion of the upper packing 27 is housed in a groove formed in the inner peripheral portion of the upper surface of the upper flange portion 20a. The upper packing 27 is in close contact with the outer surface of the first standing pipe member 91. The upper flange ring 24 and the upper flange portion 20a of the renewal joint 20 are joined by a bolt insertion hole 20h and a bolt B inserted through the 24h.

Here, the water stoppage in the lower flange ring 23 and the upper flange ring 24 is the joint between the first standing pipe member 91 and the third standing pipe member 93, and the third standing pipe member 93 and the second standing pipe member 93. It depends on the distance from the seam with 92 to the lower flange ring 23 and the upper flange ring 24. Therefore, it is preferable to set the positions of the lower flange ring 23 and the upper flange ring 24 with respect to each of these seams so that sufficient water stopping property can be ensured. That is, it is preferable to secure the length of the renewal joint 20 provided with the lower flange ring 23 and the upper flange ring 24 in the vertical direction so that sufficient water stopping property can be secured.

Next, a method of updating the piping in the drainage system as described above will be described.
As shown in FIG. 6, in order to update the standing pipe 9 on each floor, the updating joint slide step S1, the standing pipe removing step S2, and the new standing pipe attaching step S3 are sequentially executed.

In the renewal joint slide step S1, the bolt B is removed, and the lower flange ring 23 and the upper flange ring 24 are separated from the lower flange portion 20b and the upper flange portion 20a of the renewal joint 20. After that, as shown in FIG. 7, the renewal joint 20 is slid upward (however, in FIG. 7, the lower flange ring 23 and the upper flange ring 24 are omitted from the viewpoint of easy viewing of the drawing. There is). The renewal joint 20 is slid so that at least the lower end thereof is located at the same height as or higher than the upper end of the third vertical pipe member 93. As a result, the renewal joint 20 is separated from the second vertical pipe member 92, and the entire renewal joint 20 is arranged in the first vertical pipe member 91.

In the vertical pipe removing step S2, first, the third vertical pipe member 93 is laterally removed from between the collective joint 1A on the upper floor side and the collective joint 1B on the lower floor side. After that, the second vertical pipe member 92 is pulled upward from the upper member 12 of the collective joint 1B on the lower floor side to be removed. Further, the upper end of the first vertical pipe member 91 is separated from the lower member 14 of the collective joint 1A on the upper floor side (disengaged from the flange connection) and removed. In this way, the first vertical pipe member 91 and the second vertical pipe member 92 are removed from between the collective joint 1A on the upper floor side and the collective joint 1B on the lower floor side. The order of removal of the first standing pipe member 91 and the second standing pipe member 92 is not limited to the above order as long as the third standing pipe member 93 is removed.

In the new vertical pipe attachment step S3, a new first vertical pipe member 91 and a second vertical pipe member 92 are attached between the collective joint 1A on the upper floor side and the collective joint 1B on the lower floor side. To this end, first, as shown in FIG. 8, a new second vertical pipe member 92 is inserted upward into the upper member 12 of the collective joint 1B on the lower floor side and attached. Next, as shown in FIG. 9, the lower flange ring 23 is attached to the second vertical pipe member 92. The lower flange ring 23 is placed on a plurality of protrusions 92t of the second standing pipe member 92. Next, the packing 26 is attached to the upper part of the second vertical pipe member 92.

Next, as shown in FIG. 10, the renewal joint 20 is placed on the lower flange ring 23 on the protrusion 92t of the second vertical pipe member 92. The upper portion of the second vertical pipe member 92 is passed through the inside of the renewal joint 20. Further, the upper portion of the packing 26 is fitted into the groove of the lower flange portion 20b of the second vertical pipe member 92. Subsequently, the third vertical pipe member 93 is inserted inside the renewal joint 20 and placed on the second vertical pipe member 92. Further, the lower flange portion 20b and the lower flange ring 23 are joined by a bolt B.

Next, the upper flange ring 24 and the upper packing 27 are attached to the lower outer surface of the first standing pipe member 91. Subsequently, as shown in FIG. 2, the lower end of the first vertical pipe member 91 is inserted into the inside of the renewal joint 20 from above. Further, the lower end of the first vertical pipe member 91 is connected to the lower member 14 of the collective joint 1A on the upper floor side. Further, the upper flange portion 20a of the renewal joint 20 and the upper flange ring 24 are joined by bolts B.
In this way, between the collective joint 1A on the upper floor side and the collective joint 1B on the lower floor side, a new first vertical pipe member 91, a second vertical pipe member 92, and a third vertical pipe member Install 93. In this way, the renewal of the standing pipe 9 is completed.

In the present embodiment, the renewal joint 20 is attached to the second vertical pipe member 92 in the new vertical pipe attaching step S3, and then attached to the first vertical pipe member 91. However, the renewal joint 20 may be attached to the first vertical pipe member 91 and then attached to the second vertical pipe member 92.
Further, even when a standing pipe 9 is newly installed at the time of new construction, the work may be performed in the same manner as in the above-mentioned new standing pipe attaching step S3. That is, as a pipe construction method, the same work as in the new vertical pipe attachment step S3 may be carried out.

As described above, according to the piping structure and the method of updating the piping according to the present embodiment, the first standing pipe between the upper floor side collective joint 1A and the lower floor side collective joint 1B located below the upper floor side collective joint 1A. When updating the member 91 and the second vertical pipe member 92, the first vertical pipe member 91 and the second vertical pipe member 92 can be easily removed by sliding the renewal joint 20 upward. Further, the vertical position of the renewal joint 20 is defined by the protrusion 92t provided on the second vertical pipe member 92. Therefore, the drainage pipe can be efficiently renewed.

Further, a plurality of protrusions 92t are provided at intervals in the circumferential direction of the second vertical pipe member 92.
The larger the inner diameter of the renewal joint 20 than the outer diameter of the first vertical pipe member 91, the second vertical pipe member 92, and the third vertical pipe member 93, the higher the workability of the renewal work. However, as the difference between the inner diameter of the renewal joint 20 and the outer diameters of the first vertical pipe member 91, the second vertical pipe member 92, and the third vertical pipe member 93 increases, the renewal joint 20 becomes slanted. It becomes easy to tilt. On the other hand, in the piping structure according to the present embodiment, the renewal joint 20 is supported from below on the plurality of protrusions 92t so that the renewal joint 20 is aligned with the central axis of the second vertical pipe member 92. It can be easily positioned vertically.

Further, the protrusion 92t is displaced in the circumferential direction with respect to the bolt B that joins the renewal joint 20 and the lower flange ring 23.
In this case, by arranging the packing 26 between the second vertical pipe member 92 and the renewal joint 20, water stoppage between the second vertical pipe member 92 and the renewal joint 20 is ensured. .. Further, the lower flange ring 23 assembled with the packing 26 is joined to the renewal joint 20 by the bolt B. Since the protrusion 92t is displaced in the circumferential direction with respect to the bolt B, it is possible to prevent the protrusion 92t and the bolt B from interfering with each other.

Further, a third vertical pipe member 93 sandwiched between the first vertical pipe member 91 and the second vertical pipe member 92 is arranged inside the renewal joint 20.
In this case, if the third vertical pipe member 93 is removed while the renewal joint 20 is slid upward, the first vertical pipe member 91 and the second vertical pipe member 92 do not interfere with each other. It can be moved up and down by the length of the third vertical pipe member 93. This makes it possible to easily remove and attach the first standing pipe member 91 and the second standing pipe member 92.

The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment, the third standing pipe member 93 is provided between the first standing pipe member 91 and the second standing pipe member 92, but the third standing pipe member 93 is omitted. It can also be configured.

Further, in the above embodiment, the renewal joint 20 is provided in the vertical pipe 9 provided between the collective joint 1A on the upper floor side and the collective joint 1B on the lower floor side. Not limited. For example, the configuration of the present invention can also be applied when the renewal joint 20 is provided between the collective joint provided above and the leg joint provided below the collective joint.
Further, the procedure in the pipe updating method shown in the above embodiment can be changed as appropriate.

In addition, it is possible to replace the components in the embodiment with well-known components as appropriate without departing from the spirit of the present invention, and the above-mentioned modifications may be appropriately combined.

1A ... Upper floor collective joint (first joint)
1B ... Lower floor collective joint (second joint)
20 ... Renewal joint 23 ... Lower flange ring (flange)
26 ... Packing 91 ... First standing pipe member (first standing pipe)
92 ... Second standing pipe member (second standing pipe)
92t ... Protrusion 93 ... Third standing pipe member (third standing pipe)
B ... Bolt

Claims (5)

A piping structure for connecting a first joint and a second joint located below the first joint.
A first standing pipe extending downward from the first joint,
A second standing pipe extending upward from the second joint,
The lower end of the first standing pipe and the upper end of the second standing pipe are arranged inside, and a renewal joint for connecting the first standing pipe and the second standing pipe is provided.
The renewal joint is fitted into each of the first standing pipe and the second standing pipe from the outside and can be slidably moved in the vertical direction.
The second vertical pipe has a piping structure in which a protrusion for supporting the renewal joint from below is provided. The piping structure according to claim 1, wherein a plurality of the protrusions are provided at intervals in the circumferential direction of the second vertical pipe. A packing arranged between the outer surface of the second standing pipe and the inner surface of the renewal joint, and
A flange arranged between the protrusion of the second standing pipe and the lower end surface of the renewal joint and assembled with the packing,
A bolt for joining the renewal joint and the flange is further provided.
The piping structure according to claim 1 or 2, wherein the protrusions are displaced in the circumferential direction with respect to the bolt. The invention according to any one of claims 1 to 3, wherein a third standing pipe sandwiched between the first standing pipe and the second standing pipe is arranged inside the renewal joint. Piping structure. A method for updating the piping structure according to any one of claims 1 to 4.
A step of sliding the renewal joint upward, separating the renewal joint from the second standing pipe, and arranging the entire renewal joint in the first standing pipe.
A step of removing the first standing pipe and the second standing pipe from between the first joint and the second joint,
A step of attaching a new first standing pipe, a second standing pipe and a renewal joint between the first joint and the second joint, and supporting the renewal joint on the protrusion. , Equipped with, how to update the piping.

Images