JP5988856B2 - Piping pressure test jig and piping pressure test method - Google Patents

Description

  The present invention relates to a pipe pressure test jig and a pipe pressure test method, and more particularly, to a pipe pressure test jig and a pipe pressure test for independently checking the soundness of a part to be tested such as a welded part with a pipe joint. It relates to the test method.

  In various plants such as factories and power plants, the pressure resistance test of piping is performed by applying specified pressure (fluid pressure such as water pressure and air pressure) to the inside of the piping, and detecting the leakage of internal fluid from the piping. Confirming the soundness of piping.

  The pressure resistance test for piping is usually performed when construction of all lines of the piping system is completed. Therefore, when internal fluid leakage is detected and failed, repair the defective part such as re-welding the welded joint with the pipe joint after reducing the pressure of all lines and draining water. It is necessary to perform the pressure resistance test by performing water filling again. For this reason, not only is the operation complicated, but there is a possibility that the construction process may be greatly affected.

  As a technique for solving the above-described problem, there is a technique disclosed in JP-A-1-240833 (Patent Document 1). In this patent document 1, “a vacuum chamber in which a pair of pipe penetration portions (11) for airtightly penetrating a pipe through a pipe seal sheet ring (12) is provided in an opposing wall (9) ( 1) and a decompression device (18) for depressurizing the inside of the chamber (1) to a negative pressure, and the chamber (1) is configured to attach and detach to the outer surface of the pipe from the radial direction of the pipe. (11) A piping pressure test device characterized by being openable and closable at the boundary ”(refer to claim 2), and“ completed parts without waiting for completion of all line piping construction ” The pressure resistance test can be carried out every time "(see the fourth page, upper right column, lines 17 to 18).

JP-A-1-240833

  In the technique described in Patent Document 1, a pipe seal sheet ring (seal member) is pressed from both sides in a direction perpendicular to the axis of a pipe by a pair of pipe penetrating portions provided in a vacuum chamber (cover member). . For this reason, the compressive force generated in the seal member is not uniform in the circumferential direction, and there is a possibility that a portion with a low compressive force is generated. That is, if the direction in which the seal member is pressed is, for example, the vertical direction, the upper and lower portions of the seal member are sandwiched between the pipe penetration part of the cover member and the outer surface of the pipe and receive a pressing force. Although the compressive force is generated, the compressive force generated in the radial direction of the pipe is small in the left and right portions of the seal member because the pressing force received from the pipe penetrating portion of the cover member is small.

  Moreover, in the technique described in Patent Document 1, the pressing force applied to the seal member by the pipe penetrating portion is generated by a fastening force when the upper chamber and the lower chamber constituting the vacuum chamber (cover member) are coupled by a bolt. . For this reason, the pressing force to the seal member varies depending on the rigidity balance of the entire cover member, and as a result, the magnitude of the compressive force generated on the seal member may vary.

  As described above, in the technique described in Patent Document 1, the compressive force generated when the seal member mounted between the cover member and the pipe is pressed is not uniform in the circumferential direction, and the absolute compressive force is not obtained. The size may vary, and the sealing performance is not very good. For this reason, there existed a possibility of causing the fall of the precision of a pressure | voltage resistant test.

  The present invention has been made in view of such circumstances, and can independently confirm the soundness of a part under test of a pipe, and is a seal member that is mounted between a cover member that covers the part under test and the pipe. It is an object of the present invention to provide a pipe pressure test jig and a pipe pressure test method capable of improving the sealing effect by the pressure and improving the accuracy of the pressure test.

In order to solve the above-described problem, a pipe pressure resistance test jig according to the present invention is arranged on a divided cover member, which is divided into two parts, covering a part to be tested of the pipe in an internal space and covering it. A tubular seal member that is mounted between the inner surface of the insertion hole through which the pipe is inserted and the outer peripheral surface of the pipe, a pressing member that presses the end surface of the sealing member opposite to the space, and the pressing member. And a pressing member that presses the seal member toward the space along the axial direction of the pipe, and the inner surface of the insertion hole is formed in a tapered shape that decreases in diameter toward the space. the sealing member, the have a tapered outer surface formed corresponding to the inner surface, the pressing member is disposed opposite the first holding plate, and the sealing member of the first pressing plate A second pressing plate, The 1 pressure plate and the second pressure plate each have a discontinuous portion in the circumferential direction of the pipe that allows attachment and detachment in the direction perpendicular to the axis toward the outer peripheral surface of the pipe, and the space in the axial direction of the pipe When viewed from the opposite side, the discontinuous portion of the first pressing plate in the circumferential direction of the pipe is covered with the second pressing plate .

Further, the pipe pressure resistance test method according to the present invention includes a step of arranging and covering a portion to be tested of the pipe in an internal space by the cover member divided into two, and the pipe inserted through the divided surface of the cover member. A tubular sealing member having a tapered outer surface formed corresponding to the inner surface between an inner surface formed in a tapered shape that decreases in diameter toward the space of the insertion hole and an outer peripheral surface of the pipe; A step of attaching, a step of pressing the seal member toward the space along the axial direction of the pipe via a pressing member that presses an end surface of the seal member opposite to the space, and a predetermined inside of the space The pressure member includes a first pressure plate and a second pressure plate disposed on the opposite side of the first pressure plate to the seal member, and the first pressure plate. Press plate and second press plate , Each having a discontinuous portion in the circumferential direction of the pipe that allows attachment and detachment in the direction perpendicular to the axis toward the outer peripheral surface of the pipe, and when viewed from the opposite side to the space in the axial direction of the pipe, The discontinuous portion of the first pressing plate in the circumferential direction of the pipe is covered with the second pressing plate .

  According to the present invention, the soundness of the part under test of the pipe can be independently confirmed, and the sealing effect by the seal member mounted between the cover member covering the part under test and the pipe is enhanced, and the accuracy of the pressure test is improved. A pipe pressure test jig and a pipe pressure test method can be provided.

It is a disassembled perspective view which shows the piping pressure | voltage resistant test jig | tool which concerns on one Embodiment of this invention with piping. It is a perspective view of the state where the piping pressure-proof test jig shown in Drawing 1 was attached to piping. It is an expanded sectional view showing a welding part with a joint of piping. It is an enlarged side view which shows the plug as a sealing member shown by FIG. It is a figure which shows the principal part seen from the arrow A direction of FIG. It is a longitudinal cross-sectional view of a plug periphery. It is a disassembled perspective view which shows the holding member periphery of the piping pressure test jig | tool which concerns on other embodiment of this invention. It is a disassembled perspective view which shows the holding member periphery of the piping pressure test jig | tool which concerns on further another embodiment of this invention.

Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.
Note that, in the drawings shown below, the same members or corresponding members are denoted by the same reference numerals, and redundant description is omitted. In addition, the size and shape of the member may be schematically represented by being modified or exaggerated for convenience of explanation.

  FIG. 1 is an exploded perspective view showing a piping pressure test jig according to an embodiment of the present invention together with piping. FIG. 2 is a perspective view of a state in which the pipe pressure test jig shown in FIG. FIG. 3 is an enlarged cross-sectional view showing the welded portion 21 with the joint 3 of the pipe 2. FIG. 4 is an enlarged side view showing the plug 4 as the sealing member shown in FIG. FIG. 5 is a diagram showing a main part viewed from the direction of arrow A in FIG.

  As shown in FIGS. 1 and 2, the piping pressure test jig according to an embodiment of the present invention has a welded portion (covered part) of a pipe 2 with, for example, a joint 3 before the construction of all lines of the piping system is completed. It is for confirming the soundness (airtightness, watertightness) of the (test part) 21 independently.

  The pipe 2 includes a first pipe part 2a and a second pipe part 2b. The first piping portion 2a and the second piping portion 2b are inserted into the inner surface of the joint 3 from both opening end sides, respectively, and then subjected to, for example, fillet melting, and a welded portion 21 is formed and connected ( (See FIG. 3). In addition, at least one of the 1st piping part 2a and the 2nd piping part 2b may be further extended, or may be connected with another piping.

  The pipe pressure resistance test jig includes a jacket 1 as a cover member divided into two to cover a welded portion 21 of the pipe 2 with the joint 3 in an internal space S (see also FIG. 6). The jacket 1 has an upper cover 11 and a lower cover 12.

  The upper cover 11 is provided with a horizontal flange 111 having a dividing surface 115, and a plurality of through holes 112 through which the bolts 85 are inserted are formed in the horizontal flange 111. The lower cover 12 is provided with a horizontal flange 121 having a dividing surface 125, and a plurality of through holes 122 through which the bolts 85 are inserted are formed in the horizontal flange 121. Reference numeral 9 in FIG. 1 indicates a packing for jacket seal mounted between the dividing surface 115 of the horizontal flange 111 and the dividing surface 125 of the horizontal flange 121. A plurality of through holes 91 into which the bolts 85 are inserted are formed in the packing 9.

  Moreover, the vertical flange 113 is provided in the axial direction both sides of the piping 2 in the upper cover 11, The several through-hole 114 in which the volt | bolt 81 is penetrated is formed in the vertical flange 113. As shown in FIG. Vertical flanges 123 and 123 are provided on both sides of the pipe 2 in the lower cover 12 in the axial direction, and a plurality of through holes 124 through which the bolts 81 are inserted are formed in the vertical flange 123.

  Further, the upper cover 11 is formed with an attachment hole 16 for attaching a pressure pipe (not shown) extending from the pressure generator. A pressure gauge (not shown) is attached to the pressure tube, and the fluid pressure such as air pressure in the space S inside the jacket 1 is set to a predetermined pressure.

  An insertion hole 13 through which the pipe 2 is inserted is formed on the split surfaces 115 and 125 of the jacket 1. The insertion holes 13 are formed on both axial sides of the pipe 2 in the jacket 1 and communicate with the space S. The inner surface 131 of the insertion hole 13 is formed in a tapered shape that decreases in diameter toward the space S.

  The piping pressure test jig includes a plug 4 as a tubular sealing member that is mounted between the inner surface 131 of the insertion hole 13 of the jacket 1 and the outer peripheral surface 2 c of the piping 2. The plug 4 has a frustoconical outer shape, and has a tapered outer surface 41 formed corresponding to the inner surface 131 of the insertion hole 13 and a cylindrical shape formed corresponding to the outer peripheral surface 2 c of the pipe 2. And an inner surface 42 (see FIG. 4).

  The plug 4 only needs to have an outer peripheral portion that contacts the inner surface 131 of the insertion hole 13 formed in a tapered shape as at least the outer surface 41, and may further include an outer peripheral portion having another shape, for example, a cylindrical shape.

  The plug 4 is formed with a slit 43 cut from the center toward the outer surface 41 in a part of the plug 4 in the circumferential direction. The slit 43 is preferably formed to be inclined so as to have an inclination angle α (see FIG. 4) with respect to the axial direction of the plug 4 that coincides with the axial direction of the pipe 2. In this way, when the plug 4 receives a pressing force from both sides in the axial direction, opposing end surfaces corresponding to the cut surface of the slit 43 are pressed against each other, and the sealing performance by the plug 4 is improved.

  As a material of the plug 4 and the packing 9, for example, rubber such as NBR (nitrile rubber) is used.

  The pipe pressure test jig also presses the plug 4 toward the space S along the axial direction of the pipe 2 through the holding member 7 that holds the end surface 44 opposite to the space S of the plug 4 and the holding member 7. A bolt 81 and a nut 84 are provided as pressing members.

The pressing member 7 includes a divided plate 5 that is divided into two as a first pressing plate, and a U-shaped plate 6 as a second pressing plate that is disposed on the opposite side of the plug 4 of the dividing plate 5. .
The division board 5 has the board part 50 which exhibits a pair of substantially rectangular shape. The plate portion 50 is formed with a substantially semicircular cutout 51 corresponding to the outer peripheral surface 2c of the pipe 2 on the long side on the pipe 2 side. That is, the dividing plate 5 has a discontinuous portion 53 in the circumferential direction of the pipe 2 that allows the pipe 2 to be attached and detached in the direction perpendicular to the axis toward the outer peripheral surface 2 c of the pipe 2. A plurality of through holes 52 through which the bolts 81 are inserted are formed at the corners of the long side opposite to the pipe 2.

  On the other hand, the U-shaped plate 6 is formed with a notch 61 into which the pipe 2 can be inserted in a direction perpendicular to the axis from one side of the substantially square plate toward the center. It has a letter-shaped plate shape (substantially horseshoe-shaped). That is, the U-shaped plate 6 has a discontinuous portion 63 in the circumferential direction of the pipe 2 that allows the pipe 2 to be attached and detached in the direction perpendicular to the axis toward the outer peripheral surface 2 c of the pipe 2. A plurality of through holes 62 through which the bolts 81 are inserted are formed at the corners of the U-shaped plate 6.

  As shown in FIG. 5, when viewed from the side opposite to the space S in the axial direction of the pipe 2, the discontinuous portion 53 of the dividing plate 5 in the circumferential direction of the pipe 2 is covered by the U-shaped plate 6. As shown, the dividing plate 5 and the U-shaped plate 6 are arranged.

  Next, a pipe pressure test method using the pipe pressure test jig configured as described above will be described.

  First, an operator arranges and covers (covers) the welded portion 21 with the joint 3 of the pipe 2 in the internal space S by the jacket 1 divided into two. Specifically, the operator arranges the welded portion 21 of the pipe 2 with the joint 3 in the internal space S formed by the upper cover 11 and the lower cover 12, The cover 12 is sandwiched through the packing 9, and the upper cover 11 and the lower cover 12 are joined by screwing the bolt 85 and the nut 88. Here, the bolt 85 is inserted into the washer member 86, the through hole 112, the through hole 91, the through hole 122, and the washer member 87, and then screwed into the nut 88.

  Subsequently, the operator was formed between the inner surface 131 formed in a tapered shape of the insertion hole 13 formed in the jacket 1 and the outer peripheral surface 2c of the pipe 2 so as to correspond to the inner surface 131 of the insertion hole 13. A tubular plug 4 having a tapered outer surface 41 is attached (attachment step). Here, since the slit 43 is formed in the plug 4, the plug 4 can be attached to the outer peripheral surface 2 c of the pipe 2 from the outside in the direction perpendicular to the axis of the pipe 2 by expanding the slit 43.

  The plug 4 may be attached to the outer peripheral surface 2c of the pipe 2 before the upper cover 11 and the lower cover 12 are joined.

  Subsequently, the operator presses (presses) the end face 44 opposite to the space S of the plug 4 toward the space S along the axial direction of the pipe 2. Here, by connecting the jacket 1 and the pressing member 7 by screwing the bolt 81 and the nut 84, the plug 4 is pressed to the space S side via the pressing member 7.

  Specifically, the operator inserts the bolt 81 into the through holes 114 and 124 of the jacket 1 through the washer member 82, and pipes the shaft end portion of the bolt 81 from the end faces of the vertical flanges 113 and 123 of the jacket 1. 2 project outward in the axial direction. If it does in this way, it will become easy to install division board 5 and U character board 6 later, and workability will improve.

  Next, the shaft end portion of the bolt 81 projecting axially outward from the end surfaces of the vertical flanges 113 and 123 is inserted into the through hole 52 of the dividing plate 5 and the through hole 62 of the U-shaped plate 6. The dividing plate 5 and the U-shaped plate 6 are sequentially installed. Thereafter, the washer member 83 is passed through the shaft end portion of the bolt 81, the nut 84 is screwed, and the bolt 81 and the nut 84 are tightened and connected with a predetermined torque.

  Here, a spring washer and a flat washer are used as the washer member 83, but the present invention is not limited to this, and the type and presence of the washer member are arbitrary. Further, the connection method of the jacket 1 and the pressing member 7 using a screw member such as a bolt is not limited to the above-described configuration. For example, the screw 81 formed in the jacket 1 by inserting the shaft end portion of the bolt 81 from the axially outer side of the pipe 2 into the through hole 62 of the U-shaped plate 6 and the through hole 52 of the dividing plate 5 (see FIG. (Not shown).

  Here, when only the dividing plate (first pressing plate) 5 is installed, the plug 4 bulges outward from the jacket 1 by pressurizing the space S in the jacket 1 described later, and the dividing plate 5 is discontinuous. There is a possibility that the portion 53 may slightly open (deform) outward. By installing the U-shaped plate (second pressing plate) 6 so that the discontinuous portion 53 is covered, such deformation can be prevented. By using the two pressing plates (divided plate 5 and U-shaped plate 6) in this way, the plug 4 can be reliably pressed and the sealing effect can be reliably maintained.

FIG. 6 is a longitudinal sectional view around the plug 4.
As shown in FIG. 6, by fastening bolts 81 and nuts 84 with a predetermined torque, the plug 4 can be held in a state of being pressed toward the space S via the pressing member 7. Here, the inner surface 131 of the insertion hole 13 and the outer surface 41 of the plug 4 are formed in a tapered shape that decreases in diameter toward the space S. Therefore, when the plug 4 is pressed to the space S side between the inner surface 131 of the insertion hole 13 and the outer peripheral surface 2 c of the pipe 2, the plug 4 is between the inner surface 131 of the insertion hole 13 and the outer peripheral surface 2 c of the pipe 2. It is pushed like a wedge. As a result, the outer surface 41 of the plug 4 and the inner surface 131 of the insertion hole 13, and the inner surface 42 of the plug 4 and the outer peripheral surface 2 c of the pipe 2 are firmly adhered to each other, and a sealing effect is exhibited.

  Then, the operator supplies air pressure or water pressure from a pressure generator (not shown) through a pressure pipe (not shown) connected to the mounting hole 16 formed in the upper cover 11, and the inside of the jacket 1. The inside of the space S is pressurized and set to a predetermined pressure (setting step). This state is maintained for a predetermined time, the pressure in the space S is detected by a pressure gauge (not shown) attached to the pressure pipe, and it is determined that there is no pressure drop. The soundness of the welded portion 21 can be confirmed.

  As described above, the piping pressure test jig according to the present embodiment includes the jacket 1 divided into two to cover the welded portion 21 with the joint 3 of the piping 2 in the internal space S, and the split surface of the jacket 1. The tubular plug 4 mounted between the inner surface 131 of the insertion hole 13 through which the pipe 2 is inserted and the outer peripheral surface 2c of the pipe 2 and the end face 44 opposite to the space S of the plug 4 A pressing member 7 for pressing, and a bolt 81 and a nut 84 as pressing members for pressing the plug 4 toward the space S along the axial direction of the pipe 2 via the pressing member 7 are provided. The inner surface 131 of the insertion hole 13 is formed in a tapered shape that decreases in diameter toward the space S, and the plug 4 has a tapered outer surface 41 formed corresponding to the inner surface 131.

  In this embodiment, since the inner surface 131 of the insertion hole 13 and the outer surface 41 of the plug 4 are formed in a tapered shape whose diameter decreases toward the space S, the plug 4 is pressed in the axial direction toward the space S side. Then, the outer surface 41 of the plug 4 and the inner surface 131 of the insertion hole 13, and the inner surface 42 of the plug 4 and the outer peripheral surface 2 c of the pipe 2 are firmly adhered to each other, and a sealing effect is exhibited.

  At that time, the plug 4 is sandwiched between the inner surface 131 of the insertion hole 13 and the outer peripheral surface 2c of the pipe 2 and receives a uniform pressing force in the circumferential direction. Uniform in the circumferential direction. In addition, since the axial pressing force to the plug 4 is applied independently of the fastening force when the two divided jackets 1 are coupled, it does not vary depending on the rigidity balance of the jacket 1 as a whole. Thereby, the absolute magnitude of the compressive force generated in the plug 4 is also suppressed from varying.

  Therefore, according to the present embodiment, the soundness of the welded portion 21 with the joint 3 of the pipe 2 can be confirmed independently, and the sealing effect by the plug 4 mounted between the jacket 1 covering the welded portion 21 and the pipe 2 is achieved. And the accuracy of the pressure resistance test can be improved.

  FIG. 7 is an exploded perspective view showing the periphery of the pressing member 7a of the piping pressure test jig according to another embodiment of the present invention. FIG. 8 is an exploded perspective view showing the periphery of the pressing member 7b of the piping pressure test jig according to still another embodiment of the present invention. The same configurations as those in the embodiment shown in FIGS. 1 to 6 are denoted by the same reference numerals, and redundant description is omitted, and different points will be described.

  In the embodiment shown in FIG. 7, the pressing member 7 a includes a U-shaped plate 6 serving as a first pressing plate and a U-shaped serving as a second pressing plate disposed on the opposite side of the plug 4 of the U-shaped plate 6. And a plate 6. That is, in this pressing member 7a, the same U-shaped plate 6 is used for the first pressing plate and the second pressing plate, and the discontinuous portion 63 of the U-shaped plate 6 as the first pressing plate, The discontinuous portion 63 of the U-shaped plate 6 serving as the second pressing plate is configured to be positioned on the opposite side with respect to the pipe 2, specifically, on the opposite side in FIG. 7. . However, the discontinuous portion 63 of the U-shaped plate 6 serving as the first pressing plate and the discontinuous portion 63 of the U-shaped plate 6 serving as the second pressing plate may be positioned on the opposite sides. Good.

  In the embodiment shown in FIG. 8, the pressing member 7 b includes a dividing plate 5 as a first pressing plate and a dividing plate 5 as a second pressing plate disposed on the side opposite to the plug 4 of the dividing plate 5. doing. That is, in this pressing member 7b, the same dividing plate 5 is used for the first pressing plate and the second pressing plate, and the discontinuous portion 53 of the dividing plate 5 as the first pressing plate, and the second pressing plate. The discontinuous portion 53 of the divided plate 5 is positioned so as to be orthogonal to each other. Specifically, in FIG. 8, the discontinuous portion 53 of the dividing plate 5 as the first holding plate is positioned along the vertical direction, and the discontinuous portion 53 of the dividing plate 5 as the second holding plate is in the horizontal direction. It is located along. However, the discontinuous portion 53 of the dividing plate 5 as the first holding plate is positioned along the horizontal direction, and the discontinuous portion 53 of the dividing plate 5 as the second holding plate is positioned along the vertical direction. Also good.

  The embodiment shown in FIG. 7 and the embodiment shown in FIG. 8 can achieve the same effects as those of the embodiment shown in FIGS.

  As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to above-described embodiment, Various modifications are included. For example, the above-described embodiment has been described in detail for easy understanding of the present invention, and is not necessarily limited to one having all the configurations described. Also, a part of the configuration of one embodiment can be replaced with the configuration of the other embodiment, and the configuration of the other embodiment can be added to the configuration of the one embodiment. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  For example, in the above-described embodiment, the bolt 81 and the nut 84 are used as the pressing member that presses the plug 4 via the pressing member 7, but the present invention is not limited to this. For example, it is also possible to employ a configuration in which the plug 4 is pressed via the pressing member 7 by driving means such as an air cylinder.

  In the above-described embodiment, the inside of the space S inside the jacket 1 is pressurized and set to a predetermined pressure. However, the present invention is not limited to this, and the inside of the space S inside the jacket 1 is set. The pressure may be reduced and set to a predetermined pressure (vacuum degree) to determine that there is no increase in pressure. In this case, the plug 4 as a sealing member is drawn into the space S side by a pressure difference and is further brought into close contact with the inner surface 131 of the insertion hole 13 and the outer peripheral surface 2c of the pipe 2, and thus the sealing performance is further improved.

1 Jacket (cover member)
DESCRIPTION OF SYMBOLS 11 Upper cover 12 Lower cover 115,125 Dividing surface 13 Insertion hole 131 Inner surface 2 Piping 2c Outer peripheral surface 21 Welded part (test part)
3 Joint 4 Plug (seal member)
41 Outer surface 43 Slit 44 End surface 5 Dividing plate (first pressing plate, second pressing plate)
6 U-shaped plate (first presser plate, second presser plate)
53, 63 Discontinuous portion 7, 7a, 7b Holding member 81 Bolt (pressing member)
84 Nut (Pressing member)
S space

Claims (3)

A cover member divided into two to cover and cover the part under test of the pipe in the internal space;
A tubular sealing member that is mounted between the inner surface of the insertion hole that is positioned on the split surface of the cover member and through which the piping is inserted, and the outer peripheral surface of the piping;
A pressing member for pressing the end surface of the sealing member opposite to the space;
A pressing member that presses the seal member toward the space along the axial direction of the pipe via the pressing member,
The inner surface of the insertion hole is formed in a tapered shape that decreases in diameter toward the space,
The sealing member may have a tapered outer surface formed corresponding to the inner surface,
The pressing member includes a first pressing plate and a second pressing plate disposed on the side of the first pressing plate opposite to the seal member,
The first pressing plate and the second pressing plate each have a discontinuous portion in the circumferential direction of the pipe that allows attachment and detachment in the direction perpendicular to the axis toward the outer peripheral surface of the pipe,
When viewed from the opposite side of the space in the axial direction of the pipe, the discontinuous portion of the first pressing plate in the circumferential direction of the piping is covered with the second pressing plate. Piping pressure test jig to be used. The piping pressure test jig according to claim 1, wherein a slit cut from the center toward the outer surface is formed in a part of the seal member in a circumferential direction. A step of arranging and covering the part under test of the pipe in the internal space by the cover member divided into two parts,
Corresponding to the inner surface between the inner surface formed on the dividing surface of the cover member and having a tapered shape with a diameter decreasing toward the space of the insertion hole through which the pipe is inserted, and the outer peripheral surface of the pipe Mounting a tubular sealing member having a tapered outer surface formed;
Pressing the seal member toward the space along the axial direction of the pipe via a pressing member that presses the end surface of the seal member opposite to the space; and
Setting the inside of the space to a predetermined pressure, and
The pressing member includes a first pressing plate and a second pressing plate disposed on the side of the first pressing plate opposite to the seal member,
The first pressing plate and the second pressing plate each have a discontinuous portion in the circumferential direction of the pipe that allows attachment and detachment in the direction perpendicular to the axis toward the outer peripheral surface of the pipe,
The piping, wherein the discontinuous portion of the first pressing plate in the circumferential direction of the pipe is covered with the second pressing plate when viewed from the opposite side to the space in the axial direction of the piping. Pressure test method.

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