KR20130042251A - Stainless steel pipe for plumbing - Google Patents

Stainless steel pipe for plumbing Download PDF

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Publication number
KR20130042251A
KR20130042251A KR1020110106435A KR20110106435A KR20130042251A KR 20130042251 A KR20130042251 A KR 20130042251A KR 1020110106435 A KR1020110106435 A KR 1020110106435A KR 20110106435 A KR20110106435 A KR 20110106435A KR 20130042251 A KR20130042251 A KR 20130042251A
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KR
South Korea
Prior art keywords
stainless steel
steel pipe
piping
groove
pipe
Prior art date
Application number
KR1020110106435A
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Korean (ko)
Inventor
오동혁
Original Assignee
주식회사 한국슈어조인트
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Publication date
Application filed by 주식회사 한국슈어조인트 filed Critical 주식회사 한국슈어조인트
Priority to KR1020110106435A priority Critical patent/KR20130042251A/en
Publication of KR20130042251A publication Critical patent/KR20130042251A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

PURPOSE: A stainless steel pipe for piping is provided to be used in 20bar, which is the general working pressure, with an external diameter of 150A-600A. CONSTITUTION: A stainless steel pipe for piping comprises a pipe body(110), a groove(120), and a joint device(10). The pipe body has a cylindrical shape with a circular hollow. The groove is formed along the circumference of the pipe body. The joint device connects another stainless steel pipe(100) having the same structure.

Description

Stainless steel pipe for plumbing}

The present invention relates to a stainless steel pipe for piping having a structure that can be connected to other pipe stainless steel pipe by the groove joint (groove joint) method in the piping work.

In the case of water and sewage pipes or other fluids in which water and sewage flow inside, a plurality of pipes are connected to each other by piping to move the internal fluid to a certain place. According to the related art, the method of connecting the tubes is performed as follows. For example, a flange is formed at each connecting end of the pipes to be connected, and a gasket is inserted between the flanges, and the flanges are brought into contact with each other, and then joined using a screw or welding method.

However, when using the screw connection as described above, because a large number of bolt and nut members along the engaging surface edge of the flange has to be fastened, there is a problem that the work load increases. In addition, when welding is used, there is a problem that the work is inconvenient in a narrow working space, the pipe is inconvenient to replace, and the welding part is easily deformed to external impacts, etc., compared to other parts, so that fluid leaks or frequent maintenance work is required. There is a feeling.

As another example, a groove is formed along the tube circumference near each connecting end of the pipes to be connected, and the pipes are connected by mounting a joint mechanism to the grooves of the pipes while the pipes are in contact with each other. Joint methods are also used. In this case, the joint mechanism has a key part inserted into and supported in the grooves of the tubes, the joint bodies divided into two hemispheres, and mounted inside the joint bodies to maintain the airtightness of the connection portion of the tubes. It is provided with a gasket and consists of a structure in which joint bodies are mutually joined by a bolt and a nut.

However, the conventional groove joint method is set such that the groove depth is relatively lower as the outer diameter of the pipe increases. However, as the outer diameter of the pipe increases, the general allowable tolerance becomes large, especially when using a thin stainless steel pipe for thin pipe, the operating pressure is lower than that of the general pipe working pressure of 20 bar. have. For example, stainless steel pipes for Sch5 and Sch10 standards have a nominal thickness, and as the outer diameter of the pipe increases, the joint mechanism is removed from the test pressure higher than the working pressure. There is no problem.

Patent Publication No. 10-2011-0056762 (Published May 31, 2011)

An object of the present invention is to provide a stainless steel pipe for pipes that can be used without a nominal outside diameter from 20A, which is a general operating pressure from 150A to 600A.

The stainless steel pipe for piping according to the present invention for achieving the above object is provided with a cylindrical tube body having a circular hollow, along the circumference of the tube body at a position separated by a set distance from the connecting end of the tube body The groove is formed and connected to another pipe stainless steel pipe of the same structure by the joint mechanism, and the nominal outer diameter of the pipe stainless steel pipe is 150A, 200A, 250A, 300A, 350A, 400A, 450A, 500A, 550A, 600A. For the case of the standard, the depth of the groove is 4.00-4.38 mm, 4.40-4.78 mm, 4.40-4.78 mm, 4.77-5.15 mm, 4.77-5.15 mm, 4.77-5.15 mm, 4.77-5.15 mm, 4.77-5.15 mm , 6.35 to 6.73 mm, and 6.35 to 6.73 mm, respectively.

Stainless steel pipe for pipes according to the present invention, the nominal outer diameter can be used without difficulty in the general operating pressure of 20bar from 150A to 600A, can be actually used in general buildings or apartments while maximizing the stable performance of the pipe. Therefore, there may be an effect that the field of use is expanded.

In addition, the stainless steel pipe for pipes according to the present invention, even if the nominal thickness is thin as in the case of the schedule Sch5 or Sch10 standard, since it can be used at 20 bar, which is a general working pressure without difficulty, it can bring a cost saving effect.

1 is a cross-sectional view showing a state in which two stainless steel pipes for piping according to an embodiment of the present invention are connected by a joint mechanism.
2 is a cross-sectional view of the stainless steel pipe for piping of FIG.

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

1 is a cross-sectional view showing a state in which two stainless steel pipes for piping according to an embodiment of the present invention are connected by a joint mechanism, and FIG. 2 is a cross-sectional view of the stainless steel pipe for piping of FIG. 1.

1 and 2, the stainless steel pipe 100 for piping according to an embodiment of the present invention is connected to another pipe stainless steel pipe 100 having the same structure by a joint mechanism 10. Stainless steel pipe 100 for piping is configured to include a tube body 110 and the groove 120. The tube body 110 has a cylindrical shape with a circular hollow. The groove 120 is formed along the circumference of the tube body 110 at a position separated by a set distance from the connecting end of the tube body 110.

The groove 120 may be formed by the following process. The grooving mechanism for forming the groove 120 is inserted into the hollow of the tube body 110 and the tube body 110 is rotated by the grooving mechanism. At this time, while positioning the roll to roll along the circumferential surface of the tube body 110 and correspondingly with the grooving mechanism, when the roll is pressed to press the surface of the tube body 110, a predetermined depth by the entry distance is achieved. Grooves 120 may be formed.

This groove 120 interacts with the joint mechanism 10 to allow the connection of the stainless steel pipes 100 for piping. For example, the joint mechanism 10 has a hemispherical joint body 11 and a gasket 13 divided into at least one pair. The joint bodies 11 are coupled to each other by bolts and nuts in a state in which the connection parts of the stainless steel pipes 100 for piping are wrapped. The gasket 13 is arranged to surround the connection portion of the stainless steel pipes 100 for piping inside the joint body 11. The gasket 13 may be supported to be compressed to a connection portion of the stainless steel pipes 100 for piping in a state in which the gasket 13 is accommodated in the gasket receiving groove 11a formed on the inner surfaces of the joint bodies 11.

Key portions 12 are formed at both edges of the joint bodies 11, respectively. In a state in which the joint bodies 11 are coupled to surround the connection portion of the stainless steel pipes 100 for piping, one key portion 12 is inserted into and supported in the groove 120 of the one stainless steel pipe 100 for piping. The other key portion 12 is inserted into and supported by the groove 120 of the other stainless steel pipe 100 for piping, thereby maintaining the connected stainless steel pipe 100 connected to each other.

Here, the shallower the depth d of the groove, the greater the likelihood that a degassing phenomenon in which the joint mechanism 10 is separated from the stainless steel pipes 100 for piping under the same test pressure condition is increased. The test pressure may be about three times the normal bar pressure of 20 bar. On the contrary, as the depth d of the groove becomes deeper, the groove 120 forming portion of the stainless steel pipe 100 for piping may become thinner, thereby causing deformation due to internal pressure. That is, the deeper the groove depth d, the greater the possibility that the strength of the stainless steel pipe 100 for piping weakens.

Therefore, the depth d of the groove is set as shown in Table 1 below to prevent the phenomenon in which the joint mechanism 10 is detached while the stainless steel pipe 100 for the pipe has a certain level or more of strength. In Table 1, the nominal outer diameter of the stainless steel pipe 100 for piping is based on the American National Standards Institute (ANSI) standard.

Nominal Outer Diameter OD (mm) d (mm) A (mm) B (mm) Thickness t (mm)
(Sch10) 150 A 165.1 4.00-4.38 15.88 ± 0.76 mm 8.74 ± 0.76 mm 2.77 200A 219.1 4.40-4.78 19.05 ± 0.76 mm 11.91 ± 0.76 mm 2.77 250 A 273.0 4.40-4.78 19.05 ± 0.76 mm 11.91 ± 0.76 mm 3.4 300A 323.9 4.77 ~ 5.15 19.05 ± 0.76 mm 11.91 ± 0.76 mm 3.96 350 A 355.6 4.77 ~ 5.15 23.83 ± 0.76 mm 11.91 ± 0.76 mm 3.96 400 A 406.4 4.77 ~ 5.15 23.83 ± 0.76 mm 11.91 ± 0.76 mm 4.19 450 A 457.2 4.77 ~ 5.15 25.40 ± 0.76 mm 11.91 ± 0.76 mm 4.19 500 A 508.0 4.77 ~ 5.15 25.40 ± 0.76 mm 11.91 ± 0.76 mm 4.78 550A 559.0 6.35-6.73 25.40 ± 0.76 mm 12.70 ± 0.76 mm 4.78 600 A 609.6 6.35-6.73 25.40 ± 0.76 mm 12.70 ± 0.76 mm 4.78

Referring to Table 1, the depth (d) of the groove is set according to the nominal outer diameter of the pipe stainless steel pipe 100, that is, the nominal outer diameter of the pipe body (110). That is, when the nominal outer diameter of the stainless steel pipe 100 for piping is 150A, 200A, 250A, 300A, 350A, 400A, 450A, 500A, 550A, 600A standard, the depth d of the groove is 4.00-4.38 mm, 4.40 ~ 4.78mm, 4.40 ~ 4.78mm, 4.77 ~ 5.15mm, 4.77 ~ 5.15mm, 4.77 ~ 5.15mm, 4.77 ~ 5.15mm, 4.77 ~ 5.15mm, 6.35 ~ 6.73mm, 6.35 ~ 6.73mm, respectively. Is set.

Based on the data in Table 1, the depth (d) of the grooves was set for each nominal outer diameter of the pipe stainless steel pipe 100, and the experiment was conducted at the test pressure. It can be seen that the phenomenon that the joint mechanism 10 is removed from the pipe while having the above strength.

Therefore, the stainless steel pipe 100 for the pipe can be used without difficulty even at a normal working pressure of 20 bar even if the nominal outer diameter is 150A or more. As a result, the nominal outside diameter of 150A or more pipe for the stainless steel pipe 100 can be actually used in general buildings or apartments while maximizing the stable performance of the pipe, it can be effective to expand the field of use.

In addition, when the nominal thickness of the stainless steel pipe 100 for piping, that is, the nominal thickness of the tube body 110 is a schedule Sch10 standard, the depth of the groove for each nominal outer diameter of the stainless steel pipe 100 for piping based on the data in Table 1 When (d) is set, it can be confirmed that the phenomenon in which the joint mechanism 10 is removed from the pipe while the stainless steel pipe 100 for pipe has a certain level or more strength is prevented. The same effect can be confirmed by schedule Sch5 whose nominal thickness of the stainless steel pipe 100 for piping is smaller than the schedule Sch10 standard. Thus, even if the nominal thickness of the pipe stainless steel pipe 100 is a schedule Sch5, Sch10 standard, even if the thin stainless steel pipe 100 for pipes can be used at 20 bar, which is a general operating pressure, it is possible to reduce costs Can bring the effect of.

On the other hand, for the case where the nominal outer diameter of the stainless steel pipe 100 for piping is 150A, 200A, 250A, 300A, 350A, 400A, 450A, 500A, 550A, 600A standard, it is close to the connection end from the connection end of the pipe body 110. Width length A to edge of groove 120 is 15.88 ± 0.76mm, 19.05 ± 0.76mm, 19.05 ± 0.76mm, 19.05 ± 0.76mm, 23.83 ± 0.76mm, 23.83 ± 0.76mm, 25.40 ± 0.76mm, 25.40 ± Correspondingly set to values of 0.76 mm, 25.40 ± 0.76 mm and 25.40 ± 0.76 mm, respectively.

The outer circumferential surface portion of the tube body 110 located from the connecting end of the tube body 110 to the edge of the groove 120 close to the connecting end serves as a gasket sealing surface. As described above, the area of the gasket sealing surface is set for each nominal outer diameter of the pipe body 110, and thus the sealing effect by the gasket 13 for each outer diameter of the stainless steel pipe 100 for piping may be sufficiently secured.

In addition, when the nominal outer diameter of the stainless steel pipe 100 for piping is 150A, 200A, 250A, 300A, 350A, 400A, 450A, 500A, 550A, 600A, the groove width (B) is 8.74 ± 0.76 mm, 11.91 ± 0.76mm, 11.91 ± 0.76mm, 11.91 ± 0.76mm, 11.91 ± 0.76mm, 11.91 ± 0.76mm, 11.91 ± 0.76mm, 11.91 ± 0.76mm, 12.70 ± 0.76mm, 12.70 ± 0.76mm Is set. Accordingly, the groove 120 may sufficiently secure the effect of inserting and supporting the key portion 12 of the joint mechanism 10 for each of the outer diameters of the stainless steel pipe 100 for piping.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation and that those skilled in the art will recognize that various modifications and equivalent arrangements may be made therein. It will be possible. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

10. Joint mechanism 100. Stainless steel pipe for piping
110. Tube body 120. Groove
d .. depth of groove

Claims (3)

A cylindrical tubular body having a circular hollow, and a groove is formed along the circumference of the tubular body at a position separated by a set distance from the connecting end of the tubular body, and is formed by a joint mechanism for another piping stainless steel pipe of the same structure. Stainless steel pipe for piping to be connected to,
For the case where the nominal outer diameter of the stainless steel pipe for piping is 150A, 200A, 250A, 300A, 350A, 400A, 450A, 500A, 550A, 600A standard,
The depth of the groove is 4.00-4.38 mm, 4.40-4.78 mm, 4.40-4.78 mm, 4.77-5.15 mm, 4.77-5.15 mm, 4.77-55.1 mm, 4.77-5.15 mm, 4.77-5.15 mm, 6.35-6.73 mm, Stainless steel pipes for piping, characterized in that each corresponding to a value of 6.35 ~ 6.73 mm is set. The method of claim 1,
The nominal thickness of the stainless steel pipe for piping is a schedule Sch5 or Sch10 standard stainless steel pipe for piping. The method according to claim 1 or 2,
For the case where the nominal outer diameter of the stainless steel pipe for piping is 150A, 200A, 250A, 300A, 350A, 400A, 450A, 500A, 550A, 600A standard,
15.88 ± 0.76mm, 19.05 ± 0.76mm, 19.05 ± 0.76mm, 19.05 ± 0.76mm, 23.83 ± 0.76mm, 23.83 ± 0.76mm, 25.40 from the connecting end of the tube body to the edge of the groove close to the connecting end A stainless steel pipe for piping, which is set to correspond to values of ± 0.76 mm, 25.40 ± 0.76 mm, 25.40 ± 0.76 mm, and 25.40 ± 0.76 mm, respectively.
KR1020110106435A 2011-10-18 2011-10-18 Stainless steel pipe for plumbing KR20130042251A (en)

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KR1020110106435A KR20130042251A (en) 2011-10-18 2011-10-18 Stainless steel pipe for plumbing

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KR1020110106435A KR20130042251A (en) 2011-10-18 2011-10-18 Stainless steel pipe for plumbing

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019044951A (en) * 2017-09-04 2019-03-22 ホ カン、テ Grooved pipe joint adapter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019044951A (en) * 2017-09-04 2019-03-22 ホ カン、テ Grooved pipe joint adapter

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