KR20030095853A - Internal pipe lining method for use of lining pig and the lining device and the pig - Google Patents

Abstract

PURPOSE: A method for lining a pipe by using pigs is provided to lengthen the life span of the pipe by completely removing impurities from the inside of the pipe. CONSTITUTION: A method for lining a pipe(20) by using pigs comprises the steps of: moving a cleaning pig in the pipe and removing impurities from the inside of the pipe; moving a sponge pig, and drying the inside of the pipe; injecting liquid resin lining agent into the pipe; moving a lining pig(30) and lining the inner wall of the pipe; and drying the liquid resin applied to the inner wall of the pipe.

Description

Internal pipe lining method for use of lining pig and the lining device and the pig}

The present invention relates to a method and apparatus for lining a piping pipe using a pig and a pig used therein.

The pipe piping lining method using the present invention provides a cleaning method for cleaning the inside of the pipe by precisely removing the high-hard malignant scale to the inside of the long-distance pipe, and uniformly in the state in which the inner wall is cleaned through such a cleaning method. It is an ideal piping pipe lining method in which a resin lining film is formed, and relates to a lining apparatus applied thereto and a pig used therein.

Due to the rising prices in proportion to the number of years of use, the installation cost of newly constructed plumbing pipes has skyrocketed, or the construction of replacing old pipes with new plumbing pipes due to the increase in buildings and installations that are expanded around the plumbing pipes as the years pass. Increasingly, the construction becomes more complicated and difficult, especially in the case of aging pipes, it is difficult to replace them with new pipes due to the increase of the internal scale and the increase of corrosion and replacement cost of the pipe inner wall. There is a need for rehabilitation.

In order to reuse such pipes, a method of lining a liquid resin such as epoxy inside has been attempted as follows.

In the first method, as shown in FIG. 1, the both ends of the piping pipe 1 to be lined are cut about 100 m in a straight pipe section, and the scale inside the piping pipe is scraped off with a scraper bucket and dried, and then sandblasted (SAND-). BLASTING) to remove the internal scale, and then connect the hose (3) to which the resin liquid is supplied from the resin liquid container (5) to the winding roll (4) to the nozzle (2) located inside the piping pipe. This is a method of spray coating a lining material such as epoxy while the nozzle 2 moves inside the piping pipe 1.

This method has many limitations in construction as follows.

(1) In reality, all piping pipes have a number of curved portions in up, down, left and right directions, so that only straight pipes can be constructed and lining of curved pipes is impossible.

(2) It is impossible to remove all the attachment scales inside the piping pipe by the scraper bucket, and even when sandblasting as a reinforcing cleaning means is formed, it is firmly and partially formed throughout the entire section. Since the construction must be done by checking whether the thick scale part is removed, it takes a lot of time, and there are many problems such as the removal of the scale inside the plumbing pipe cannot be completed in reality.

(3) It is impossible to lining up the uppipes and upward downpipes, as well as the curved pipes generated during long-distance piping.The longer the length, the longer the lining fluid transfer hose is, which increases the flow resistance. There is a problem (at least 2-300m).

The second method is to put a resin solution such as epoxy into the piping pipe, and then lining by a general foam type pig (Foam pig).

This method has the great advantage that it can be used for long distance lining of several kilometers without constriction of the bend, but it is not activated for the following reasons.

1) The precondition for lining by the application of the resin liquid is that the metal surface of the inner wall of the lining pipe can be completely cleaned.

However, no method has been developed so far to completely remove the various foreign substances, moisture, and oil that are strongly adhered to the inner wall of the pipe so that the lining is possible.

Internal precision cleaning of long distance plumbing pipes is a technically difficult problem. The reason is that due to the nature of the piping pipe, even if the pipe pipe is a little long, it is impossible to access the inside, so the pipe inside can not be cleaned without cutting the pipe pipe into many sections. This is especially true for older pipes, where the malicious scale has already advanced considerably.

2) Due to the moisture remaining inside the pipe immediately after cleaning, a fine oxide film is formed on the inner wall of the pipe, and after a lining, the oxide film is accelerated and the peeling of the lining surface is increased.

In other words, if the inner wall of the pipe is not properly treated, the lining resin film does not go away for a long time and peels off or the oxidation of iron oxide (rust) remaining inside the film continues to swell (swells up) and pushes or separates the lining film between them. Water or other fluids can seep into and accelerate the oxidation.

Therefore, a good cleaning method is required to obtain the correct lining effect.

3) Also, as a pretreatment step for such a lining, there was no pig which could remove the high hardness malignant scale required in the cleaning step.

That is, no attempt has been made in the prior art about a method for removing malignant scales that meets specifications and levels suitable for cleaning required in the pretreatment step of the lining.

4) On the other hand, it is very difficult to control the curing time and lining film thickness of synthetic resin such as epoxy. This is very demanding and difficult because it must be adjusted according to the distance of the piping pipe, and the viscosity and curing time are correlated with each other so that it is not properly adjusted and may cause a problem that the coating liquid on the upper portion of the piping pipe flows down before it is cured. do. The reason for this is that the resin liquid hardens during the running of the pigs if the curing time is not well controlled when the piping pipe is long.

5) Since the lining quality and construction quantity, or thickness formation, can vary according to the type of lining pig, the shape and hardness of the pig are a key factor that directly affects the lining film formation. There was no attempt.

For example, as the piglets become larger and heavier as they grow in size, the weight of the piglets presses down the pipe, resulting in a thinner pipe lining. The heavier the pig type, the more severe this phenomenon is. Therefore, it is necessary to use a solid and light type of pig.

As shown in FIG. 2, when the hardness of the pigment is too low, such as foam PIG 2, the lining may become impossible when it is contracted by the resin liquid 6 having a high viscosity and slumped.

Therefore, an ideal lining requires a pig that is light and designed with the right shape and specifications.

6) In addition, since the pigs are driven by compressed air, the driving stops frequently occur immediately before the pigs are bent when passing the bent part, the rising part, or the descending part. As the expansion causes severe fluctuations in the running speed of the pig, a constant driving speed control technique is also required.

7) In the case of lining the "T" branch pipe, the lining liquid flows in between the branch pipes, causing the problem of closing the holes. It may be interrupted.

If the pipe is a new pipe, rust may be generated inside the pipe during the process from the pipe factory to the site, and oil, muddy water, foreign substances, weld beads, or weld spatters introduced into the pipe when the pipe is installed. Various foreign matters may be attached to the wall of the pipe, so the resin liquid for epoxy and lining will not adhere properly if you do not clean thoroughly.

In addition, in the case of existing plumbing pipes, as well known in the experience of water pipes, it is not possible to completely remove the malignant scales such as iron oxide (rust) formed in the pipes, which is the biggest problem in the pipe lining rehabilitation technology. It is emerging.

It is impossible to realistically completely remove such malignant scales from the inner wall of the plumbing pipe and it is hardly realized in the lining rehabilitation of the existing plumbing pipe.

In addition, there is no solution for removing a small amount of thin oxide film remaining on the pipe wall after cleaning is a problem of the pipe lining method.

SUMMARY OF THE INVENTION In view of all these problems and needs, an object of the present invention is to provide a new method of piping lining in which a cleaning of lining pipe is completed by circulating the pig by means of pressurized water or compressed air and then lining. Has its purpose.

An object of the present invention is to provide a pipe pipe lining method using a pigtail reinforced with a foreign material removal step and descaling process of various processes before the lining of the pipe.

SUMMARY OF THE INVENTION An object of the present invention is to provide a piping pipe lining method in which various pigs suitable for each cleaning process for removing foreign substances as described above are selectively used.

Pipe lining method using the present invention is a step of removing the fat that is a fatal obstacle to the adhesion of the lining resin liquid, and by changing the remaining or newly formed oxide film (rust) until the end after cleaning the lining resin liquid It is also an object to provide a surface pretreatment step that greatly increases the adhesion of the.

The present invention also has an object to provide a lining pig suitable for performing in the lining process as described above.

An object of the present invention is to provide a cleaning and lining apparatus suitable for carrying out the cleaning of several processes repeatedly before performing the lining method using the above-described pig, and then performing the lining method.

The present invention also has an object to provide a suitable guide device when passing through the "T" shaped branch pipe of the pipe in performing the lining using the pig and lining device as described above.

1 is a schematic diagram for explaining a conventional plumbing pipe lining method,

Figure 2 is a schematic diagram for explaining a conventional plumbing pipe lining method.

3A is a cross-sectional view of an embodiment of a pig applied to a pipe piping lining method of the present invention, and FIG. 3B is a cross-sectional view of another embodiment of a pig applied to a pipe pipe lining method of the present invention.

Figure 4a is a view for explaining the cleaning process in the pipe pipe of the present invention, Figure 4b is a view for explaining the pipe pipe lining method of the present invention.

5 to 10 are various functional pigs used in the lining method of the present invention,

11A and 11B show a guide device for guiding a pig at a "T" shaped branch pipe position in the lining method of the present invention.

※ Explanation of code for main part of drawing

10: launcher, 12: receiving part, 20: piping pipe, 30: lining pig,

31: protrusion, 32: disc, 34: central axis, 33: edge, 35: pressurizing body,

36: indentation part, 40: compressed air supply means, 41: compression pump, 50: water tank,

60: collection box, 70: pig guide device, 72: cover, 74: span, 76: guide plate,

80: lining liquid container, 300, 310, 320, 330, 340: scaling pig, 350: sponge,

Pipe lining method using a pig of the present invention for achieving the above object

1) a cleaning step of removing foreign matters such as scales attached to the inner wall of the pipe by running predetermined cleaning pigs until the inner wall of the pipe is clean by compressed air and pressurized water; 2) a drying step of continuously feeding the sponge pig into the dry compressed air to wipe the inside of the pipe pipe and to dry; 3) a lining step of injecting an appropriate amount of a liquid resin lining agent such as epoxy calculated in consideration of the length and thickness of the pipe pipe into the pipe pipe, and forcing the gas into a predetermined lining pig to line the pipe pipe inner wall; And 4) aging and drying the resin liquid applied to the inner pipe of the plumbing pipe.

The foreign material removal step of the pipe lining method using the pig of the present invention performs the first cleaning by running the pig with the pressurized water or compressed air inside the pipe pipe, and performs a second cleaning with a pig formed a metal wire brush on the surface. This is preferred.

The secondary cleaning pig of the foreign material removal step of the pipe lining method using the pig of the present invention preferably forms a metal wire brush on the surface.

Descaling the residual malignant that has not been removed after cleaning while descaling the descaling pig dedicated to the removal of malignant scale as high pressure water between the cleaning step and the pipe drying step of the pipe lining method using the present invention pig It is preferred to further comprise a step.

The descaling step of the pipe lining method using a pig of the present invention is a pigtail planted with sharp metal pins on the body to remove the malignant scale remaining in the bottom layer of the inner wall of the pipe after cleaning to strongly remove the adhered scale and the like. This is preferred.

The primary cleaning pig of the cleaning step of the pipe lining method using the pig of the present invention is preferably a pig having a predetermined ring-shaped protrusion around the outside.

Pigment in the drying step of the pipe lining method using the pig of the present invention is preferably made of a sponge pipe nominal diameter 1 inch to 2 inches large.

The drying compressor body in the drying step of the pipe lining method using a pig of the present invention is preferably made of nitrogen gas.

Pipeline lining method using the present invention is preferably further comprises a fat removal step to remove the fat that is attached to the inner wall of the pipe pipe to remove the fatal obstacles to the adhesion of the lining resin liquid by running the pig with a degreasing agent.

Pipe lining method using the present invention is a lining resin by forming a primer layer while removing the rust on the surface of the inner wall of the pipe by applying a special decontamination agent to change the oxide film (rust) remaining or newly formed until the end after cleaning It is preferred to further include a surface pretreatment step which greatly increases the adhesion of the liquid.

In order to achieve the above object, the present invention provides a pipe-lining pigtail with a pointed protrusion of a predetermined diameter D2, and a disc-shaped edge of a predetermined diameter D1 around the protrusion. The inner side is formed of a pressure-propelled body forming a recessed portion of the predetermined diameter (D1), the outer side of the central axis connecting such a line, the rear end is a pig formed with at least two disc-shaped disk, the line, the rear end of the lining dedicated pig It is preferable that the inside of the central axis connecting the communication with the indentation, the hollow filled with the liquid resin.

Dedicated pig central axis of the pipe lining method using the present invention,

It is preferable to manufacture the specification (D1 × 0.3) ≦ D2 ≦ (D1 × 0.9).

Pipe lining apparatus using the present invention Pigment and the water tank for supplying high-pressure water from the launch unit side of the pipe; Compressed air supply means is installed on the side of the discharge pipe of the plumbing pipe for firing compressed air to transfer the pig; Step-by-step cleaning pigs inserted into the pipe to scale and dry the pipe inner wall; A lining pig which is moved by a predetermined conveying means in the pipe to line the inside of the pipe after cleaning; It is preferable to include collecting boxes for collecting foreign matters during cleaning and collecting pigs through a receiving unit during lining.

Piping lining device using a pig of the present invention is a guide plate made of a curved shape to match the pipe wall surface to the "T" shaped branch pipe of the pipe, the space connecting the guide plate, and a guide cover for supporting the space from the outside It is preferable to further comprise a guide device made of.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

3A is a cross-sectional view of an embodiment of a pig applied to a pipe piping lining method of the present invention, FIG. 3B is a cross-sectional view of another embodiment of a pig applied to a pipe pipe lining method of the present invention, and FIG. 4B is a view for explaining a cleaning process, and FIG. 4B is a view for explaining a pipe piping lining method of the present invention.

The cleaning according to the figures is as follows.

<Step 1>

As a step of removing foreign matters attached to the inner wall before the lining operation, the inside of the pipe 20 is driven by a pump 41 or compressed air until the inner wall is clean. By the first brush 300, 310 of the shape as shown in Figures 5 and 6 attached to the pig body surface without a wire brush or a metal pin, the initial cleaning is performed. However, the surface of the pig may be used in parallel with the type coated with an elastomer.

Subsequently, secondary cleaning is performed with the second pigs 320 and 330 in the form in which the metal brush shown in FIGS. 7 and 8 is attached to the surface of the pig.

In driving the above-mentioned pigs, as shown in FIG. 4A, the piglets 300, 310, 320, and 330 which are movably embedded in the piping pipe 20 and the piping pipe 20 are shown. A pressurized water pump 41 for high pressure conveying the water of the water tank 50 so as to transfer the pigs as high pressure water, and to the launching unit 10 side of the piping pipe 20. It is installed, at the same time or selectively with the pressurized water compressed air supply means 40 for transporting the pig by firing the compressed air, and the receiving portion which is located in the pipe 20, the pig 30 is discharged ( 12) and a collection box 60 for collecting the scale discharge water discharged by the pig 30 and the pig after running.

<Step 2>

Next, the metal pin shown in FIG. 9A is finally scraped with a pig 340 in the form of a pig body, and runs until the inner wall is clean (however, if the scale is soft, this step is omitted). Final cleaning of the tube.

This process compresses and supplies water from the launching unit 10 to the receiving unit 12 to the pump 41 to push the inside of the pipe 20 into the pig, thereby removing and discharging the last malignant oxide layer.

In addition, the pig used in this process can be implemented as a pig 340 in the form of a metal pin is embedded in the pig body as shown in Figs. 9b and 9c.

<Third step>

As a step of drying the inside of the piping pipe, as shown in FIG. 10, the sponge 350 having a diameter larger than the inside diameter of the piping pipe is continuously compressed with dry compressed air or nitrogen gas to clean the inside of the piping pipe and completely clean the inside surface of the pipe. To dry.

<Step 4>

As a fat and oil removal step, the degreasing agent is added to the inside of the pipe pipe while being pushed by the pig, and the fat and oil which is a fatal obstacle to adhesion of the lining layer is removed.

<Step 5>

After cleaning, insert the special decontamination agent that remains on the inner wall of the pipe or changes the newly formed oxide film (rust) into a primer and puts the calculated amount between the pig and the pig in consideration of the diameter and length of the pipe. Apply to the inner wall of the pipe while driving.

<Step 6>

As an inner wall lining step of the piping pipe, an appropriate amount of liquid resin lining agent, such as epoxy, calculated in consideration of the length and thickness of the piping pipe is injected from the supply container 80 into the piping pipe 20 as shown in FIG. 4B. Then, after putting the lining fifth pig 300, immediately run with compressed air or nitrogen gas.

In other words, the amount of lining resin that is calculated in consideration of the piping pipe size, distance, and the appropriate lining thickness is poured into the pipe, and the special air-only lining of the multi-plate type is inserted into the compressed air or nitrogen gas inflow rate to proceed at the prescribed speed. Slowly feed while adjusting. If you want to increase the lining thickness, you can repeat the above procedure.

The central axis 34, which forms a space 37 opened to one side, such as a lining pigtail 30 used in the lining method to minimize the weight of the pig and minimize the problem of reducing the thickness of the lower lining I can do it. It consists of two or more discs 32 of hardness which are hard to shrink, and can keep the thickness of a lining axis constant.

As shown in FIG. 3A, the lining-only pigtail has a central portion of the tip side a formed with a pointed protrusion 31 having a predetermined diameter D2, and has a disc shape having a predetermined diameter D1 about the protrusion 31. It forms the edge 33 of, the rear end (b) the pressure-propelling body 35 forms a concave part 36 of the predetermined diameter (D1) in which the inside is recessed, and the center (c) connecting such a line, the rear end is Pigment 30 in communication with the concave inlet 36 and formed of a hollow shaft 34 filled with a liquid resin, at least two of the disk-shaped disk 32 is used. However, the pipe diameter nominal diameter of 16 inches or less can be implemented in the form of a hollow rather than a hollow shaft as shown in Figure 3b.

On the other hand, if the diameter (D2) of the shaft is too large, the weight of the piglet increases, which not only adversely affects the formation of the lining thickness of the lower part, but also becomes too stiff in the axial direction and stops running for a while due to the pressure increase when passing through the bent portion. Sudden expansion of the compressed air at the moment of passage can result in a high speed of launch, resulting in a loss of lining quality around it.

In addition, the state of the lining in the bent portion is caused by the stiff pig body is strongly bent while causing a large problem, such as the thickness of the lining becomes irregular depending on the site.

To solve this problem, the diameter of the lining dedicated pigtail is ideally (D1 × 0.3) ≦ D2 ≦ (D1 × 0.9).

Where D2 is the outer diameter of the shaft and D1 is the outer diameter of the disc.

In addition, the piglets used for lining have two or more lining disks in the size of a pig, and a cup-shaped propellant is provided in the tail part, and the inside of the shaft forms a space. If the inside of the shaft is nominal size of the pipe pipe 16 inches or less, both the type and the hollow shaft shape of the inside of the shaft can be used, but the pipe pipe 16 inches or more is preferably used in the hollow shaft shape.

<Step 7>

As a step of aging and drying the resin liquid applied to the inner wall of the tube, the resin liquid applied to the inner wall of the tube is aged and dried to complete lining.

On the other hand, in performing the lining method of the liquid resin by the pig, the piglets used in the pre-treatment cleaning process of the inner wall surface of the piping pipe is a piglet shown in Fig. 7 is a type of metal wire brush attached to the surface of the pig, Use a type in which metal pins are planted on the surface as shown in 8.

Piping pipe lining pigtail shown in Figure 4b,

The central portion of the tip side forms the pointed protrusion 31 of the predetermined diameter D2, and forms a disc-shaped edge 33 of the predetermined diameter D1 around the protrusion 31, and the rear end is a predetermined recessed inside. At least two disc-shaped disks 32 are formed on the outer side of the central axis 34 that connects the line and the rear end, and constitutes the pressure-propelling body 35 constituting the recess 36 of the diameter D1. The inside of the central shaft 34 connecting the line and the rear end of the lining-only pig 30 communicates with the concave inlet 36 and has a hollow structure in which a liquid resin is filled.

The pipe central axis 34 dedicated to the piping pipe lining,

(D1 × 0.3) ≦ D2 ≦ (D1 × 0.9).

(D2 is the outer diameter of the shaft, D1 is the outer diameter of the disc, and the unit is inches.)

Piping lining device using the invention piglet shown in Figure 4b,

Pigment 30 which is movably embedded in the piping pipe 20, and the water tank 50 for supplying the pressurized water for transporting the pigs are installed on the launch unit 10 side of the piping pipe 20 and And a compressed air supply means 40 which is installed at the launching unit 10 side of the plumbing pipe 20 and simultaneously or selectively fires compressed air with the pressurized water to transfer the pigs, and the piping 20 Located in, it consists of a receiving unit 12 for the pig 30 is discharged and the collecting box 60 for collecting the pig 30.

The pipe pipe lining apparatus of the present invention has a section 74 and a guide cover 72 in which a guide plate 76 is connected to a “T” branch pipe of a pipe 20 as shown in FIGS. 11A and 11B. Installing the integrated guide device 70 solves the problem of clogging the resin liquid enters the "T" shaped branch pipe during lining. In other words, the pig run guide device 70 is a section 74 and the guide cover 72 of the guide cover (76) connected to the "T" shaped branch pipe of the pipe 20, the guide device 70 of the pipe 20 It is installed in the branch pipe so that the lining resin liquid does not leak into the "T" branch pipe when the pig runs under the guide plate 76.

In other words, the resin liquid for lining is branched when the pig is traveling in a large space of the "T" branch pipe by inserting the pig running guide device 70 and fixing it to the flange so that the pig can travel smoothly before construction. This can prevent the side from filling up.

As described above, the present invention provides a method capable of completely removing an attachment substance in a piping pipe, which has not been possible in the related art, and the removal of such attachment substance enables excellent resin lining construction to greatly extend the life of the piping pipe. Has the effect.

In addition, it takes less time for construction and also enables lining of long-distance piping pipes and up and down pipe parts. The life of old pipes can be greatly extended, and the life of new pipes can be greatly extended. It becomes possible.

Meanwhile, the piglets such as metal pins used in the lining method of the present invention can remove the high hardness malignant scale, and thus become a decisive factor for the formation of an excellent lining film.In particular, the lining-only pigs used for lining have a hollow shaft shape By minimizing the weight of the chair, it is possible to minimize the problem that the lining thickness of the lower portion is reduced, and also it is possible to drive while keeping the lining thickness constant.

In addition, the special cleaning solution that changes iron oxide (rust) to a primer will completely remove even fine iron oxide (rust) that remains on the end of the pipe wall to make it into a primer state. Will be greatly extended.

In addition, the "T" branch pipe is inserted into the "pig running guide device" to be fixed to the flange to allow the pig to travel smoothly before construction, so that the pigs stop traveling in the large space of the "T" branch pipe. The problem can be prevented, and the lining resin can fill the branch pipe and close the hole.

Claims (15)

In the plumbing pipe lining method, 1) a cleaning step of removing foreign matters such as scales attached to the inner wall of the pipe by running a predetermined cleaning pig until the inner wall of the pipe is clean by compressed air and pressurized water; 2) a drying step of continuously feeding the sponge pig into the dry compressed air to wipe the inside of the pipe pipes and to dry; 3) a lining step of injecting an appropriate amount of a liquid resin lining agent such as epoxy calculated in consideration of the length and thickness of the pipe pipe into the pipe pipe, and forcing the gas into a predetermined lining pig to line the pipe pipe inner wall; And 4) Piping pipe lining method using a piglet comprising the step of aging and drying the resin liquid applied to the pipe inner wall. The method of claim 1, The foreign material removal step, Pigment 300 is driven in the piping pipe by pressurized water or compressed air, and the first cleaning is performed, and the second cleaning is performed by the pig 320 having the metal wire brush 322 formed on the surface thereof. Plumbing pipe lining method used. The method of claim 2, The second cleaning pig of the foreign material removing step is a pigtail pipe lining method using a pig, characterized in that the pigtail (330) having a metal wire brush (322) formed on the surface. The method according to any one of claims 1 to 3, Pipe descaling the remaining malignant that has not been removed after cleaning while descaling the descaling pig dedicated to the removal of malignant scale as high pressure water between the cleaning step and the pipe drying step. Pipe lining method. The method of claim 4, wherein The descaling step is a pig 340 planted with sharp metal pins in the body to remove the malignant scale remaining in the inner wall of the inner wall after cleaning, the water to press the water strongly to remove the adhered scales Plumbing pipe lining method using. The method of claim 1, The primary cleaning pig of the cleaning step is a pigtail pipe lining method using a pig, characterized in that the pig 310 having a predetermined ring-shaped protrusion round the outside. The method of claim 1, Pigment of the drying step is a pipe pipe lining method using a pigtail, characterized in that the sponge pipe nominal diameter 1 inch to 2 inches larger. The method of claim 1, The drying compressor body of the drying step is a piping pipe lining method using a pig, characterized in that the nitrogen gas. The method of claim 1, And a fat removal step of removing a fat which is a fatal obstacle to the adhesion of the lining resin liquid by attaching a degreasing agent to the inside of the plumbing pipe to run the pig. The method of claim 1, Surface pretreatment to increase the adhesion of lining resin liquid by forming a primer layer while removing rust on the inner wall surface of the pipe by applying a special decontamination agent that changes the remaining or newly formed oxide film (rust) to the primer layer after cleaning. Plumbing pipe lining method using a pigtail further comprising a step. In the pigtail for plumbing pipe lining, The central portion of the tip side forms the pointed protrusion 31 of the predetermined diameter D2, and forms a disc-shaped edge 33 of the predetermined diameter D1 around the protrusion 31, and the rear end is a predetermined recessed inside. Pigment which forms the pressure-propelling body 35 forming the recess 36 of the diameter D1, and the outer side of the central axis 34 connecting such a line and the rear end is formed with at least two disc-shaped disks 32 ( Pigment for piping pipe lining, characterized in that 30). The method of claim 11, Pigment for pipe line lining, characterized in that the inside of the central shaft (34) connecting the line, the rear end of the dedicated lining pig 30 communicates with the concave inlet 36, the hollow filled with the liquid resin. The method of claim 11, Pigment central axis 34 dedicated pipe piping, Pigment for piping pipe lining, produced in the specification (D1 × 0.3) ≤ D2 ≤ (D1 × 0.9). (D2 is the outer diameter of the shaft, D1 is the outer diameter of the disc, and the unit is inches.) In the device for lining between the tip launching portion 10 and the receiving portion 12 of the pipe using a pig, A water tank 50 for supplying high pressure water from the launch unit 10 side of the plumbing pipe 20; Compressed air supply means 40 is installed on the launch unit 10 side of the piping pipe 20 for firing the compressed air to transfer the pig; Step-by-step cleaning pigs 300, 310, 320, 330, 340, 350, which are charged into the pipe to scale and dry the pipe inner wall; A lining pig 30 which is moved by a predetermined conveying means in the inner pipe to lining the inner pipe 20 after cleaning; The pipe lining device using a pig, including collecting bins (60) and (80) for collecting the foreign matter when cleaning, and during the lining to obtain a pig through the receiving unit (12). The method of claim 1, A guide plate 76 having a curved surface conforming to the pipe wall surface in the "T" shaped branch pipe of the pipe 20, a space 74 connecting the guide plate 76, and a space 74 outside the pipe 74. Piping pipe lining device, characterized in that it further comprises a guide device 70 made of a guide cover 72 for supporting in.