JP6396241B2 - Surface pressure measurement system - Google Patents

Surface pressure measurement system Download PDF

Info

Publication number
JP6396241B2
JP6396241B2 JP2015053824A JP2015053824A JP6396241B2 JP 6396241 B2 JP6396241 B2 JP 6396241B2 JP 2015053824 A JP2015053824 A JP 2015053824A JP 2015053824 A JP2015053824 A JP 2015053824A JP 6396241 B2 JP6396241 B2 JP 6396241B2
Authority
JP
Japan
Prior art keywords
plurality
surface pressure
flange
measurement
surface
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
JP2015053824A
Other languages
Japanese (ja)
Other versions
JP2016173318A (en
Inventor
紘光 扇田
紘光 扇田
伸二 木村
伸二 木村
誉志男 林田
誉志男 林田
弘行 山根
弘行 山根
裕介 亀井
裕介 亀井
Original Assignee
株式会社東芝
東芝エネルギーシステムズ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社東芝, 東芝エネルギーシステムズ株式会社 filed Critical 株式会社東芝
Priority to JP2015053824A priority Critical patent/JP6396241B2/en
Publication of JP2016173318A publication Critical patent/JP2016173318A/en
Application granted granted Critical
Publication of JP6396241B2 publication Critical patent/JP6396241B2/en
Application status is Active legal-status Critical
Anticipated expiration legal-status Critical

Links

Images

Description

  Embodiments described herein relate generally to a surface pressure measurement system.

  Generally, a flange joint shown in FIGS. 6A and 6B is used for connecting two pipes in a plant facility. In this flange joint, the pipe and the flange are joined by joint welding. The joint surfaces of the flanges in the two flange joints are surface-joined via a sealing material, and the two flange joints are joined by tightening a tightening bolt and nut using a tool such as a torque wrench. At this time, the tightening amount of the tightening bolt is confirmed by a torque check.

  On the other hand, there is a method in which a ring-shaped surface pressure measuring element for detecting the flange surface pressure is arranged in an O-ring groove on the joint surface of the flange, and the surface pressure at the joint surface of the two surface-joined flanges is measured. is there. In this method, the soundness of the tightening operation is confirmed by measuring the surface pressure at the joint surface of the two flanges when tightening the tightening bolt and nut that join the two flanges.

JP-A-4-184231

  In a plant facility, if a leak occurs from the joined flange joint, the plant is urgently stopped and the influence on the operation is large. For this reason, preventing leakage from the joined flange joint is an important issue in operating the facility.

  Further, as a cause of leakage from the joined flange joint, there are problems in tightening and construction management at the time of tightening work such as defective mounting of gaskets and packing and one-side tightening. In order to prevent this problem, the value of the torque applied to the tightening bolts and nuts actually applied has been confirmed. For this reason, the method of confirming by loosening the part once tightened and retightening or retightening is taken. However, it cannot be said that the accuracy of the torque value obtained by the method of loosening the part once tightened and tightening again is good, and it is a reverse work. In addition, it is difficult for the method by retightening to feel the start of turning around a small bolt of less than M6.

  In addition, when the tightening of the tightening bolt is loosened during operation of the plant equipment, it is difficult to identify the tightening bolt in which the loosening has occurred. For this reason, in the present situation, when loosening occurs, the countermeasures such as retightening all tightening bolts remain.

  The surface pressure measurement system according to the present embodiment includes a plurality of surface pressure measurement elements and a plurality of output lines. The plurality of surface pressure measuring elements are arranged at a plurality of locations on the joint surface of the second flange facing the first flange to be coupled, and output measurement signals corresponding to the surface pressures at the plurality of locations on the joint surface. The plurality of output lines are connected to each of the plurality of surface pressure measuring elements and output measurement signals of the plurality of surface pressure measuring elements.

  When loosening occurs in the tightening of the tightening bolt, it is possible to easily identify the tightening bolt in which the loosening occurs.

FIG. 1A is a diagram illustrating an example of a front view of a surface pressure measurement system using a circular flange. 1B is a cross-sectional view taken along line D1-D1 ′ of FIG. 1A. 1C is a cross-sectional view taken along line D2-D2 ′ of FIG. 1A. FIG. 2A is a diagram illustrating an example of a front view of a surface pressure measurement system using a square flange. 2B is a cross-sectional view taken along line D3-D3 ′ of FIG. 2A. 2C is a cross-sectional view taken along line D4-D4 ′ of FIG. 2A. FIG. 3 is a diagram illustrating an example of a surface pressure measurement system using a portable measuring instrument. FIG. 4 is a diagram illustrating an example of a work flow. FIG. 5 is a diagram illustrating an example of a surface pressure measurement system having an alarm unit. FIG. 6A is a diagram illustrating an example of a conventional flange joint using a circular flange. 6B is a cross-sectional view taken along line D5-D5 ′ of FIG. 6A.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1A is a diagram illustrating an example of a front view of a surface pressure measurement system 1 using a circular flange. 1B is a cross-sectional view taken along line D1-D1 ′ of FIG. 1A. 1C is a cross-sectional view taken along line D2-D2 ′ of FIG. 1A. First, an example of the surface pressure measurement system 1 according to the first embodiment will be described with reference to FIGS. 1A to 1C.

  As shown in FIGS. 1A to 1C, the surface pressure measuring system 1 is a surface pressure measuring system used for measuring the surface pressure at the joint surface of the flange 11 facing the flange 10 to be coupled, for example. The surface pressure measurement system 1 includes a plurality of surface pressure measurement elements 20, 21, 22, 23 and output lines 30, 31, 32, 33.

  First, the surface pressure measuring elements 20, 21, 22, 23 and the output lines 30, 31, 32, 33 will be described. The plurality of surface pressure measuring elements 20, 21, 22, 23 are, for example, piezo elements. The plurality of surface pressure measuring elements 20, 21, 22, 23 are elements whose electromotive force increases as the surface pressure increases, for example. For this reason, the plurality of surface pressure measuring elements 20, 21, 22, and 23 each output a measurement signal having a magnitude corresponding to the electromotive force.

As shown in FIG. 1B, each of the plurality of surface pressure measuring elements 20, 21 is formed at the end of the corresponding plurality of rod-shaped terminals 40, 41. Although the surface pressure measuring elements 22 and 23 are not shown in FIG. 1, like the surface pressure measuring elements 20 and 21, each of the surface pressure measuring elements 22 and 23 has a corresponding rod-like terminal 42 and 43, respectively. It is formed in the edge part. As shown in FIGS. 1A to 1C, the output lines 30, 31, 32, and 33 are respectively connected to a plurality of surface pressure measuring elements 20, 21, 22, and 23 via a plurality of rod-shaped terminals 40, 41, 42, and 43. It is connected.
Moreover, each of the plurality of rod-shaped terminals 40, 41, 42, 43 is formed on a male screw. In the flange 11, a plurality of insertion portions corresponding to the plurality of rod-shaped terminals 40, 41, 42, and 43 are formed in the female screw. Each of the plurality of rod-shaped terminals 40, 41, 42, 43 is screwed into the corresponding plurality of insertion portions. Thus, each of the plurality of surface pressure measuring elements 20, 21, 22, and 23 is disposed at a plurality of locations on the joint surface of the flange 11. Further, each of the plurality of rod-like terminals 40, 41, 42, and 43 screwed can be rotated in the direction opposite to the screwing direction and can be inserted and removed.
Next, the structures of the flanges 10 and 11 and the pipes 50 and 51 will be described. As shown in FIGS. 1B and 1C, flanges 10 and 11 are used to connect the pipes 50 and 51. As shown in FIG. 1A, the flange 11 has a disk shape, for example, and a hole corresponding to the shape of the pipe 51 is formed at the center thereof. A plurality of rod-like terminals 40, 41, 42, 43 and a plurality of fastening bolts 60, 61, 62, 63 are alternately arranged at equal intervals on the circumference of the circle C 1 of the flange 11.
As shown in FIGS. 1B and 1C, each of the pipes 50 and 51 is used to transport fluids such as liquid, gas, and powder. The flange 10 is coupled to the end of the pipe 50 inserted into the above-described hole by, for example, joint welding. Similarly, the flange 11 is coupled to the end of the pipe 51 by, for example, joint welding. In general, a pipe and a flange connected to the pipe are called a flange joint. In general, a disk-shaped flange is referred to as a circular flange, and a square-shaped flange is referred to as a square flange.

  As shown in FIGS. 1A to 1C, the joint surfaces of the flanges 10 and 11 are joined via a seal material 70, for example. A plurality of tightening bolts 60, 61, 62, 63 inserted into the flange holes of the joined flanges 10, 11 and nuts 80, 81, 82, 83 corresponding to the respective bolts are tightened with a tool such as a torque wrench. Yes. Thereby, the piping 50 and 51 is couple | bonded.

In general, the flange shape, the sealing material, and the like are varied depending on the type and pressure of the fluid flowing in the pipes 50 and 51. For example, in the case of a fluid such as low-pressure oil, water, and steam, it is common to use a flange of a full face seat and a seat packing as a sealing material for the flange joint. In the case of a fluid such as high-pressure oil, it is common to use a hydraulic flange with an O-ring groove and an O-ring as a sealing material for the flange joint. In the case of high-pressure steam, it is common to use a grooved flange and a spiral gasket as a sealing material for the flange joint.
Next, adjustment of the tightening force of the plurality of tightening bolts 60, 61, 62, 63 and the corresponding nuts 80, 81, 82, 83 will be described. When the joining surfaces of the flanges 10 and 11 are joined with a uniform pressure, the surface pressure on the circumference of the circle C1 becomes substantially the same. For this reason, when the magnitude | sizes of the measurement signal which each of several surface pressure measuring element 20, 21, 22, 23 each outputs become substantially the same, it respond | corresponds to several clamping bolts 60, 61, 62, 63 and each. The surface pressure at the joint surface generated by the tightening force of the nuts 80, 81, 82, 83 is almost the same.

As a result, a plurality of tightening bolts 60, 61, 62, 63, and 63 are obtained by performing a tightening operation to make the magnitudes of the measurement signals output from the plurality of surface pressure measuring elements 20, 21, 22, 23 substantially the same. The tightening force of the nuts 80, 81, 82, 83 corresponding to each can be adjusted. Thus, by observing the measurement signal, it is possible to adjust the tightening force of the plurality of tightening bolts 60, 61, 62, 63 and the corresponding nuts 80, 81, 82, 83.
Next, estimation of the loosened bolts among the plurality of bolts 60, 61, 62, 63 will be described. After the tightening operation is completed, as described above, the magnitudes of the measurement signals output from the plurality of surface pressure measuring elements 20, 21, 22, and 23 are substantially the same. For this reason, it is possible to estimate a loose tightening bolt by continuously observing the measurement signals output from the respective surface pressure measuring elements 20, 21, 22, 23.
For example, when the tightening bolt 60 is loosened, as shown in FIG. 1A, the magnitude of the measurement signal obtained from the rod-shaped terminals 40 and 42 that come in contact with the tightening bolt 60 is the measurement obtained from the other rod-shaped terminals. It becomes smaller than the signal. Thereby, it can be estimated that the fastening bolt 60 is loosened. As described above, when the tightening of the plurality of tightening bolts 60, 61, 62, 63 and the nuts 80, 81, 82, 83 corresponding to the respective tightening bolts is loosened, Identification can be facilitated.
Next, an example of the surface pressure measurement system 1 when the flanges 12 and 13 are square flanges will be described with reference to FIGS. 2A to 2C. FIG. 2A is a diagram illustrating an example of a front view of the surface pressure measurement system 1 using a square flange. 2B is a cross-sectional view taken along line D3-D3 ′ of FIG. 2A. 2C is a cross-sectional view taken along line D4-D4 ′ of FIG. 2A. The same components as those in FIG. The surface pressure measurement system 1 in the case of using the square flanges 12 and 13 is different from the surface pressure measurement system 1 in the case of using the circular flanges 10 and 11 in the arrangement of the plurality of rod-shaped terminals 44, 45, 46 and 47.

As shown in FIGS. 2A to 2C, the fastening bolts 64, 65, 66, and 67 are arranged at equal intervals on the circumference of the circle C2. Also, a plurality of rod-shaped terminals 44, 45, 46, 47 are arranged at the midpoints of the sides of the square Q1 that connect the fastening bolts 64, 65, 66, 67, respectively. A plurality of rod-shaped terminals 44, 45, 46, and 47 are arranged at equal intervals on the circumference of a circle C3 that is the same center point as the circle C2 and has a smaller radius than the circle C2. Each of the output lines 34, 35, 36, and 37 is connected to a plurality of surface pressure measuring elements 24, 25, 26, and 27 via a plurality of rod-shaped terminals 44, 45, 46, and 47.
First, adjustment of the tightening force of the plurality of tightening bolts 64, 65, 66, 67 and the corresponding nuts 84, 85, 86, 87 will be described. When the joining surfaces of the square flanges 12 and 13 are joined with a substantially uniform surface pressure, the surface pressure on the circumference of the circle C3 is substantially the same. Further, the surface pressure on the circumference of the circle C2 is substantially the same.

  For this reason, when the magnitude | size of the measurement signal which each of several surface pressure measuring element 24, 25, 25, 27 outputs becomes substantially the same, it respond | corresponds to several clamping bolts 64, 65, 66, 67 and each. The surface pressure at the joint surface generated by the tightening force of the nuts 84, 85, 86, and 87 is substantially the same. As a result, a plurality of tightening bolts 64, 65, 66, 67, and 67 can be obtained by performing a tightening operation to make the magnitudes of the measurement signals output from the plurality of surface pressure measuring elements 24, 25, 25, 27 substantially the same. It is possible to adjust the tightening force of the nuts 84, 85, 86, 87 corresponding to each. Thus, even when a square flange is used, the tightening force of the plurality of tightening bolts 64, 65, 66, and 67 and the corresponding nuts 84, 85, 86, and 87 can be adjusted by observing the measurement signal. It can be performed.

  Next, estimation of the loose tightening bolt among the plurality of tightening bolts 64, 65, 66, 67 will be described. As in the case of FIG. 1, by continuously observing the measurement signals output from each of the plurality of surface pressure measuring elements 24, 25, 25, and 27, it is possible to estimate the loose tightening bolt. For example, when the tightening bolt 64 is loosened, as shown in FIG. 2A, the magnitude of the measurement signal of the rod-shaped terminals 44 and 47 adjacent to the tightening bolt 64 is smaller than the measurement signal obtained from the other rod-shaped terminals. Become. Thereby, it can be estimated that the fastening bolt 64 is loosened. As described above, even when a square flange is used, if a plurality of tightening bolts 64, 65, 66, and 67 and the corresponding nuts 84, 85, 86, and 87 are tightened, they are loosened. It is possible to facilitate the identification of the tightening bolt in which the is generated.

  FIG. 3 is a diagram illustrating an example of the surface pressure measurement system 1 using the portable measuring instrument 90. An example of processing of the surface pressure measurement system 1 using the portable measuring instrument 90 will be described with reference to FIG. The surface pressure measurement system 1 shown in FIG. 3 differs from the surface pressure measurement system 1 shown in FIG. 1 by including a portable measuring device 90.

  As shown in FIG. 3, the portable measuring instrument 90 includes a processing unit 100, a storage unit 110, and a display control unit 120. The processing unit 100 converts each measurement signal obtained from the plurality of surface pressure measuring elements 20, 21, 22, and 23 into a measurement value corresponding to the surface pressure. The storage unit 110 stores the measurement value converted by the processing unit 100. The display control unit 120 causes the display units 91 and 92 to display information related to the measurement values converted by the processing unit 60. For example, when confirming past measurement values, the display control unit 120 causes the display units 91 and 92 to display information about the measurement values based on the measurement values stored in the storage unit 110.

  Next, display of information related to measurement values will be described. The processing unit 100 converts the input measurement signals of the plurality of surface pressure measurement elements 20, 21, 22, and 23 into time-series measurement values, respectively. The display control unit 120 displays the measurement values converted in time series on the graphs of the plurality of display units 91 and 92, respectively. In this graph, the horizontal axis indicates the elapsed time. The vertical axis indicates the value of the measurement value that has been converted.

  Since a plurality of measurement values are displayed side by side on the graph, each of the plurality of measurement values can be compared and observed on the graph. A plurality of measured values to be compared vary depending on the adjustment of the tightening force of the plurality of tightening bolts 60, 61, 62, 63 and the corresponding nuts 80, 81, 82, 83. For this reason, since the tightening force can be adjusted while confirming the fluctuation of the measured value on the graph, it is possible to increase the efficiency of the tightening work compared to the case where the graph is not displayed. The surface pressure measurement system 1 using the portable measuring instrument 90 is portable, and the plurality of rod-shaped terminals 40, 41, 42, 43 can be removed from the flange 11.

  FIG. 4 is a diagram illustrating an example of a work flow. In the graph in FIG. 4, the horizontal axis indicates the elapsed time, and the vertical axis indicates the value of the measured value obtained from the surface pressure measuring element. The graph in FIG. 4 is an example of a display image displayed on the display unit 91 by the display control unit 120.

  Moreover, the upper figure (a) of FIG. 4 has shown the example of the time series change of the measured value in the normal state. The lower part (b) of FIG. 4 shows an example of a time-series change in measured values when an abnormal state occurs in tightening of the tightening bolt. As shown in the upper diagram (a) of FIG. 4, in the normal state, the measured value indicating the surface pressure increases with the start of the tightening operation, and the tightening operation is completed after reaching the control value. Even after the tightening operation is completed, the measured value is maintained at the control value.

  On the other hand, as shown in the lower part (b) of FIG. 4, in the case of an abnormality when an abnormal state occurs, the tightening bolt is loosened after the tightening operation is completed, and the measured value deviates from the control value. If the control value falls outside, tighten the loosened bolts. As a result, the measurement value returns to the management value again. In this way, by observing the measured value, it is possible to detect that the tightening bolt has been loosened before leakage of fluid or the like occurs from the joint surfaces of the flanges 10 and 11. Thereby, it is possible to prevent a leak by retightening.

  As described above, in the present embodiment, the plurality of surface pressure measuring elements are arranged at a plurality of locations on the joint surface of the flange facing the flange to be coupled. For this reason, it is possible to output measurement signals corresponding to the surface pressures at a plurality of locations on the joint surface through different output lines. Thereby, when loosening occurs in the tightening of the tightening bolt, it is possible to easily identify the tightening bolt in which the loosening occurs.

(Second Embodiment)
FIG. 5 is a diagram illustrating an example of the surface pressure measurement system 1 according to the second embodiment. The second embodiment is different from the first embodiment by further including an alarm unit 130. Measurement signals measured by the plurality of surface pressure measuring elements 20, 21, 22, and 23 are input to the alarm unit 130.

  For example, as shown in the lower part (b) of FIG. 4, the alarm unit 130 outputs an alarm when any value of the measurement signal deviates from a predetermined management value. The alarm unit 130 may display an alarm message on the display unit 93. Furthermore, the alarm unit 130 may issue an alarm by voice. Further, the alarm unit 130 may display a graph as shown in FIG. In this way, by continuously monitoring the surface pressure applied to the flange joint surface after construction, an alarm can be automatically output when a surface pressure value that deviates from the control value is measured. Thereby, it is possible to automatically detect that any of the tightening bolts has become loose.

  In addition, as described above, tightening in which loosening has occurred by checking which measurement signal out of the measurement signals measured by each of the plurality of surface pressure measurement elements 20, 21, 22, and 23 deviates from the control value. Bolts can be estimated.

  Thus, it is possible to automatically detect that any of the tightening bolts has been loosened and to estimate the tightening bolt in which the loosening has occurred. For this reason, before it becomes a situation which stops a plant installation, it is possible to respond | correspond by tightening etc. to the tightening volt | bolt which produced looseness. Thereby, it is possible to recover to a sound tightened state at the time of construction.

  As described above, in the present embodiment, an alarm is issued when any value of the measurement signal deviates from a predetermined management value. Thereby, it is possible to detect that any of the tightening bolts has become loose.

  Although several embodiments have been described above, these embodiments are presented as examples only and are not intended to limit the scope of the invention. The novel system described herein can be implemented in various other forms. Various omissions, substitutions, and changes can be made to the system configuration described in the present specification without departing from the gist of the invention. The appended claims and their equivalents are intended to include such forms and modifications as fall within the scope and spirit of the invention.

  1: Surface pressure measuring system 10, 11, 12, 13: Flange, 20-27: Surface pressure measuring element, 30-37: Output line, 40-47: Rod terminal, 50, 51: Piping, 60-67: Clamping bolt, 70 Sealing material, 80 to 87: Nut, 90 Portable measuring instrument, 91, 92, 93: Display unit, 100 processing unit, 110 storage unit, 120 display control unit, 130 alarm unit

Claims (9)

  1. A plurality of surface pressure measuring elements that are arranged at a plurality of locations on the joint surface of the second flange facing the first flange to be coupled, and that output measurement signals corresponding to the surface pressures at the plurality of locations on the joint surface;
    A plurality of output lines connected to each of the plurality of surface pressure measuring elements and outputting measurement signals of the plurality of surface pressure measuring elements;
    Equipped with a,
    Wherein the plurality of surface pressure measuring element is formed respectively on the ends of the plurality of rod-like terminals, the plurality of rod-like terminal is inserted into a plurality of insertion portions respectively formed in the second flange, the surface pressure measuring system.
  2. The surface pressure measurement system according to claim 1 , wherein each of the plurality of rod-shaped terminals is formed as a male screw and is detachably inserted into the plurality of insertion portions formed in the female screw.
  3. The second flange is circular, and the first flange and the second flange are coupled using a plurality of fastening bolts,
    Wherein the plurality of bar-like terminals and the plurality of fastening bolts, the surface pressure measuring system according to claim 1 or 2 are arranged at equal intervals alternately on the same circumference.
  4. Said second flange is a quadrangle, said first flange and said second flange, the surface pressure measuring system according to claim 1 or 2 is coupled with a plurality of fastening bolts.
  5. A processing unit that converts the measurement signal into a measurement value indicating the surface pressure of each of the plurality of locations;
    A display control unit for displaying information on the measurement value on a display unit;
    The surface pressure measurement system according to any one of claims 1 to 4 , further comprising:
  6. The processing unit converts the measurement signal into a measurement value of the surface pressure at each of the plurality of points in time series, and the display control unit displays information about each measurement value obtained in the time series. The surface pressure measurement system according to claim 5 , which is displayed on the screen.
  7. The surface pressure measurement system according to claim 6 , wherein the display control unit and the display unit displayed by the display control unit are configured in a portable measurement device.
  8. An alarm unit for outputting an alarm when any value of the measurement signal deviates from a predetermined management value;
    The surface pressure measurement system according to any one of claims 1 to 7, further comprising:
  9. A plurality of surface pressure measuring elements that are arranged at a plurality of locations on the joint surface of the second flange facing the first flange to be coupled, and that output measurement signals corresponding to the surface pressures at the plurality of locations on the joint surface;
    A conversion unit for converting the measurement signals of the plurality of surface pressure measurement device, the measurement values indicating the surface pressure of the plurality of positions in said joint surface,
    A display control unit for displaying information on each of the measurement values on a display unit;
    An alarm unit that issues an alarm when the measured value is compared with a threshold value and deviates from the value;
    Equipped with a,
    The plurality of surface pressure measuring elements are respectively formed at end portions of a plurality of rod-shaped terminals, and the plurality of rod-shaped terminals are inserted into the plurality of insertion portions formed on the second flange, respectively. System .
JP2015053824A 2015-03-17 2015-03-17 Surface pressure measurement system Active JP6396241B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2015053824A JP6396241B2 (en) 2015-03-17 2015-03-17 Surface pressure measurement system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2015053824A JP6396241B2 (en) 2015-03-17 2015-03-17 Surface pressure measurement system

Publications (2)

Publication Number Publication Date
JP2016173318A JP2016173318A (en) 2016-09-29
JP6396241B2 true JP6396241B2 (en) 2018-09-26

Family

ID=57008964

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2015053824A Active JP6396241B2 (en) 2015-03-17 2015-03-17 Surface pressure measurement system

Country Status (1)

Country Link
JP (1) JP6396241B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101882614B1 (en) * 2017-05-25 2018-07-26 이문승 Assembly for Connecting Pipes

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2272524B (en) * 1992-11-10 1994-11-09 Christopher Philip Sperring Joints
US20070193361A1 (en) * 2006-02-20 2007-08-23 Davie/Coffee Technologies, LLC Compressive load sensor by capacitive measurement
JP4699935B2 (en) * 2006-04-26 2011-06-15 株式会社日立エンジニアリング・アンド・サービス Flange fastening monitoring device
JP2009191932A (en) * 2008-02-14 2009-08-27 Hitachi Plant Technologies Ltd Equipment and material for flange fastening training

Also Published As

Publication number Publication date
JP2016173318A (en) 2016-09-29

Similar Documents

Publication Publication Date Title
US3521910A (en) Tube coupling
US3387867A (en) Joint construction
CA1119839A (en) Diaphragm seal assembly
CA1176189A (en) Pipe tester plug
CA2259417C (en) Joints
US9400070B2 (en) Conduit fitting with sensor on a threaded nut
CA2006312C (en) Stabilized connector flange and method for interconnecting an instrumentmanifold with an orifice plate assembly
JP4955394B2 (en) Pressure module
US3700268A (en) Positive locking terminal bushings for flexible pipe
US5036879A (en) Pulsation dampener and flow check apparatus
US3258279A (en) Connector seal
CN1447096A (en) Produce transformer and method for coupling working pressure to pressure sensor
CA2710891C (en) Seal with rigid stop ring
WO2002001174A1 (en) Apparatus for testing or isolating a segment of pipe
EP0177116B1 (en) Adapter seal
US2423655A (en) Pipe coupling or joint
PT1769184E (en) Reusable fitting for tubing
US8955551B2 (en) Pipe sealing tool with external and internal clamp
US4519637A (en) Pipe coupling
US4817994A (en) Aseptic pipe joint
CN100357648C (en) Fittings
US7784838B2 (en) High pressure energizable tube connector for a well
US4770207A (en) Fluidic system
CA1110292A (en) Flange sealing joint with removable metal gasket
US6438814B1 (en) Method of forming a connection between a tube and a fitting

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20170911

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A712

Effective date: 20171122

A711 Notification of change in applicant

Free format text: JAPANESE INTERMEDIATE CODE: A711

Effective date: 20171124

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20180621

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20180626

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20180719

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20180731

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20180829

R150 Certificate of patent or registration of utility model

Ref document number: 6396241

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150