JP2001059794A - Method and device for inspecting airtightness of pipe joint part - Google Patents
Method and device for inspecting airtightness of pipe joint partInfo
- Publication number
- JP2001059794A JP2001059794A JP11237734A JP23773499A JP2001059794A JP 2001059794 A JP2001059794 A JP 2001059794A JP 11237734 A JP11237734 A JP 11237734A JP 23773499 A JP23773499 A JP 23773499A JP 2001059794 A JP2001059794 A JP 2001059794A
- Authority
- JP
- Japan
- Prior art keywords
- closed space
- pressure
- pipe joint
- airtightness
- pipe
- 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.)
- Pending
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は管接合部の気密検査方
法および装置に関し、特にたとえば水道管やガス導管に
おける管接合部の気密検査方法および装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for checking the airtightness of a pipe joint, and more particularly to a method and an apparatus for checking the airtightness of a pipe joint in, for example, a water pipe or a gas pipe.
【０００２】[0002]
【従来の技術】従来、水道管やガス導管の接合部の気密
性を検査する際には、一定長の管路を配管した後に、管
路内に封止治具を取付けて閉空間を形成し、この閉空間
に水または空気を満たした状態で加圧し、閉空間内にあ
る管接合部からの水または空気の漏洩の有無を調べるよ
うにしていた。2. Description of the Related Art Conventionally, when inspecting the airtightness of a joint of a water pipe and a gas pipe, a closed space is formed by installing a sealing jig in the pipe after laying a pipe of a predetermined length. Then, the closed space is pressurized while being filled with water or air, and the presence or absence of leakage of water or air from a pipe joint in the closed space is examined.
【０００３】[0003]
【発明が解決しようとする課題】従来技術では、一定長
の管路を配管する工程、封止治具を取付ける工程および
閉空間に水または空気を満たして加圧する工程等が必要
であった。そのために、管の接合直後にその接合部だけ
を気密検査することは困難であった。In the prior art, a step of piping a pipe of a fixed length, a step of attaching a sealing jig, a step of filling a closed space with water or air, and pressurizing the closed space are required. For this reason, it was difficult to perform an airtight inspection of only the joint immediately after joining the tubes.
【０００４】それゆえに、この発明の主たる目的は、管
の接合直後に簡単に気密検査することのできる、管接合
部の気密検査方法および装置を提供することである。SUMMARY OF THE INVENTION It is, therefore, a primary object of the present invention to provide a method and an apparatus for inspecting an airtightness of a pipe joint, which can easily perform an airtightness inspection immediately after joining a pipe.
【０００５】[0005]
【課題を解決するための手段】第１の発明は、管接合部
の周囲に閉空間を設け、閉空間を所定の圧力に加圧また
は減圧して放置し、閉空間の圧力変動を検出することに
よって管接合部の気密性を検査する、管接合部の気密検
査方法である。According to a first aspect of the present invention, a closed space is provided around a pipe joint, and the closed space is pressurized or depressurized to a predetermined pressure and left, and pressure fluctuation in the closed space is detected. This is a method for inspecting the airtightness of the pipe joint by inspecting the airtightness of the pipe joint.
【０００６】第２の発明は、管接合部の周囲に閉空間を
形成する閉空間形成部材、閉空間を加圧または減圧する
ポンプ、および閉空間の圧力を測定する圧力測定手段を
備える、管接合部の気密検査装置である。A second aspect of the present invention is a pipe provided with a closed space forming member for forming a closed space around a pipe joint, a pump for pressurizing or depressurizing the closed space, and pressure measuring means for measuring a pressure in the closed space. This is an airtightness inspection device for a joint.
【０００７】[0007]
【作用】管接合部の周囲に、閉空間形成部材により閉空
間を形成し、閉空間には、ポンプおよび圧力測定手段を
接続する。そして、ポンプにより、閉空間を所定の圧力
に加圧または減圧して、閉空間と管路との間に圧力差を
生じさせる。その状態で一定時間放置し、時間の経過に
伴う閉空間の圧力変動を圧力測定手段により検出する。A closed space is formed around the pipe joint by a closed space forming member, and a pump and pressure measuring means are connected to the closed space. Then, the closed space is pressurized or depressurized to a predetermined pressure by the pump to generate a pressure difference between the closed space and the pipeline. In this state, the system is left for a certain period of time, and the pressure fluctuation in the closed space with the passage of time is detected by the pressure measuring means.
【０００８】管接合部の気密性が不良である場合は、閉
空間と管路との間の圧力差により両者間で水または空気
が漏洩し、圧力変動が生じる。一方、管接合部の気密性
が良好である場合は、水または空気が漏洩しないため、
圧力変動は生じない。したがって、圧力変動の有無によ
り気密性の良否を判定できる。[0008] If the airtightness of the pipe joint is poor, water or air leaks between the closed space and the pipe due to the pressure difference between the two, causing pressure fluctuations. On the other hand, if the airtightness of the pipe joint is good, water or air will not leak,
No pressure fluctuations occur. Therefore, the quality of airtightness can be determined based on the presence or absence of pressure fluctuation.
【０００９】[0009]
【発明の効果】この発明によれば、管の接合直後にその
接合部だけを簡単に気密検査することができる。According to the present invention, it is possible to easily perform an airtight inspection on only the joint immediately after joining the pipes.
【００１０】この発明の上述の目的，その他の目的，特
徴および利点は、図面を参照して行う以下の実施例の詳
細な説明から一層明らかとなろう。The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
【００１１】[0011]
【実施例】図１および図２を参照して、この実施例の管
接合部の気密検査装置１０は、たとえば水道管やガス導
管の管路敷設の際に、２つの管１２および１４を継手１
６を用いて接合した後に、この管接合部１８の気密性を
検査するためのものである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS. 1 and 2, an airtightness inspection apparatus 10 for a pipe joint according to this embodiment connects two pipes 12 and 14 to each other when, for example, laying a water pipe or a gas pipe. 1
After joining using the pipe 6, the airtightness of the pipe joint 18 is inspected.
【００１２】気密検査装置１０は、管接合部１８の周囲
に閉空間２０を形成する閉空間形成部材２２、閉空間２
０を加圧するポンプ２４および閉空間２０の圧力を測定
する圧力測定手段である圧力計２６等によって構成され
る。The airtightness inspection apparatus 10 includes a closed space forming member 22 for forming a closed space 20 around the pipe joint 18, and a closed space 2.
It comprises a pump 24 for pressurizing 0 and a pressure gauge 26 as pressure measuring means for measuring the pressure in the closed space 20.
【００１３】閉空間形成部材２２は、鉄やアルミニウム
合金等の金属からなる第１部材２８および第２部材３０
を含む。The closed space forming member 22 includes a first member 28 and a second member 30 made of a metal such as iron or aluminum alloy.
including.
【００１４】第１部材２８は、半円筒状の本体３２を含
む。本体３２の長さおよび内径は、その内部空間３２ａ
に管接合部１８を収容することができるように、管接合
部１８の長さおよび外径よりも十分に大きく設定され
る。そして、本体３２の軸方向の一方端部には第１側壁
３４が形成され、他方端部には第２側壁３６が形成さ
れ、第１側壁３４および第２側壁３６には管１２および
１４の外径よりもやや大きい内径を有する半円状の開口
部３４ａおよび３６ａが形成される。また、本体３２の
周方向の両端部には、ボルト・ナット３８を取付けるた
めの取付け部４０が径方向に突出して形成され、各取付
け部４０には、２つのボルト孔４０ａが軸方向に所定の
間隔を隔てて形成される。さらに、本体３２の周方向中
央部には、ポンプ用接続口４２と圧力計用接続口４４と
が形成される。そして、第１部材２８の第２部材３０と
の接合面、すなわち第１側壁３４（開口部３４ａを含
む。）、第２側壁３６（開口部３６ａを含む。）および
取付け部４０のそれぞれの下面には、板状のゴムシール
材４６が内部空間３２ａを囲繞するようにして装着され
る。The first member 28 includes a main body 32 having a semi-cylindrical shape. The length and inner diameter of the main body 32 are
The pipe joint 18 is set to be sufficiently larger than the length and outer diameter of the pipe joint 18 so that the pipe joint 18 can be accommodated therein. A first side wall 34 is formed at one end in the axial direction of the main body 32, and a second side wall 36 is formed at the other end, and the tubes 12 and 14 are formed on the first side wall 34 and the second side wall 36. Semicircular openings 34a and 36a having an inner diameter slightly larger than the outer diameter are formed. At both ends in the circumferential direction of the main body 32, mounting portions 40 for mounting bolts and nuts 38 are formed so as to protrude in the radial direction, and each mounting portion 40 has two bolt holes 40a in the axial direction. Are formed at intervals. Further, a connection port 42 for the pump and a connection port 44 for the pressure gauge are formed at the center in the circumferential direction of the main body 32. Then, the lower surface of the joint surface of the first member 28 with the second member 30, namely, the first side wall 34 (including the opening 34a), the second side wall 36 (including the opening 36a), and the mounting portion 40. , A plate-like rubber seal material 46 is attached so as to surround the internal space 32a.
【００１５】第２部材３０は、ポンプ用接続口４２と圧
力用接続口４４とが形成されないことを除いて、第１部
材２８と同様に形成される。すなわち、第２部材３０
は、半円筒状の本体４８を含み、本体４８の軸方向の一
方端部には開口部５０ａを有する第１側壁５０が形成さ
れ、他方端部には開口部５２ａを有する第２側壁５２が
形成される。また、本体４８の周方向の両端部には、ボ
ルト孔５４ａを有する取付け部５４が径方向に突出して
形成される。そして、第２部材３０の第１部材２８との
接合面には、板状のゴムシール材５６が第２部材３０の
内部空間４８ａを囲繞するようにして装着される。The second member 30 is formed similarly to the first member 28 except that the pump connection port 42 and the pressure connection port 44 are not formed. That is, the second member 30
Includes a semi-cylindrical main body 48, a first side wall 50 having an opening 50a formed at one end in the axial direction of the main body 48, and a second side wall 52 having an opening 52a formed at the other end. It is formed. At both ends in the circumferential direction of the main body 48, mounting portions 54 having bolt holes 54a are formed so as to protrude in the radial direction. Then, a plate-shaped rubber seal member 56 is attached to the joint surface of the second member 30 with the first member 28 so as to surround the internal space 48a of the second member 30.
【００１６】管接合部１８の気密性を検査する際には、
まず、管接合部１８の周囲に、閉空間形成部材２２によ
って密閉された閉空間２０を形成する。すなわち、検査
対象となる管接合部１８の上下に第１部材２８と第２部
材３０とを配置し、開口部３４ａと開口部５０ａとで管
１２を挟持し、かつ、開口部３６ａと開口部５２ａとで
管１４を挟持する。そして、各ボルト孔４０ａおよび５
４ａにボルト３８ａを挿通し、これにナット３８ｂを螺
合して第１部材２８と第２部材３０とを連結する。この
とき、管路５８の圧力は大気圧（約０．１ＭＰａ）にあ
る。When checking the airtightness of the pipe joint 18,
First, a closed space 20 sealed by a closed space forming member 22 is formed around the pipe joint 18. That is, the first member 28 and the second member 30 are arranged above and below the pipe joint 18 to be inspected, the pipe 12 is sandwiched between the opening 34a and the opening 50a, and the opening 36a and the opening The tube 14 is sandwiched between the tube 14 and 52a. Then, each bolt hole 40a and 5
The first member 28 and the second member 30 are connected by inserting a bolt 38a into the 4a and screwing a nut 38b into the bolt 38a. At this time, the pressure in the conduit 58 is at the atmospheric pressure (about 0.1 MPa).
【００１７】次いで、ポンプ２４から延びるチューブ６
０の先端に設けられた接続部６０ａをポンプ用接続口４
２に接続し、また、圧力計２６から延びるチューブ６２
の先端に設けられた接続部６２ａを圧力計用接続口４４
に接続する。Next, the tube 6 extending from the pump 24
0 is connected to the pump connection port 4a.
2 and a tube 62 extending from the pressure gauge 26
The connecting portion 62a provided at the tip of the
Connect to
【００１８】そして、ポンプ２４を駆動し、圧力計２６
で確認しながら閉空間２０を所定の圧力に加圧する。こ
の所定圧力値は、たとえば１ＭＰａ等に設定される。閉
空間形成部材２２は、組み立て状態において十分な耐圧
力を備えるよう設計する必要がある。Then, the pump 24 is driven and the pressure gauge 26
The closed space 20 is pressurized to a predetermined pressure while confirming the above. This predetermined pressure value is set to, for example, 1 MPa. The closed space forming member 22 needs to be designed to have a sufficient pressure resistance in an assembled state.
【００１９】所定の圧力を得たら、ポンプ２４を停止
し、所定の時間（たとえば０．５〜１時間程度）放置す
る。管接合部１８の気密性が不良である場合、高圧の閉
空間２０から低圧の管路５８へ空気の漏洩が起こるの
で、閉空間２０の圧力が変動（低下）する。したがっ
て、放置時間内における圧力変動の無有を調べることに
よって、管接合部１８の気密性の良否を判定できる。圧
力変動が生じた場合は、気密性不良すなわち接合不良で
あるため、継手１６を撤去し、他の継手を用いて再度接
合する等して対処する。When a predetermined pressure is obtained, the pump 24 is stopped and left for a predetermined time (for example, about 0.5 to 1 hour). If the airtightness of the pipe joint 18 is poor, air leaks from the high-pressure closed space 20 to the low-pressure pipe 58, so that the pressure in the closed space 20 fluctuates (decreases). Therefore, the quality of the airtightness of the pipe joint 18 can be determined by examining the absence of the pressure fluctuation during the standing time. If a pressure fluctuation occurs, the joint 16 is removed and the joint is re-joined using another joint, for example, because of poor airtightness, that is, poor joint.
【００２０】この実施例によれば、管接合部１８の周囲
に閉空間２０を設け、この閉空間２０を加圧して、気密
検査を行うようにしたので、管の接合直後に特定個所の
管接合部１８だけに対して簡単に気密検査を行うことが
できる。According to this embodiment, the closed space 20 is provided around the pipe joint 18, and the closed space 20 is pressurized to perform an airtight inspection. An airtight inspection can be easily performed only on the joint 18.
【００２１】なお、この実施例では、閉空間２０に空気
を充填しているが、空気に代えて水を充填し、水圧の変
動を調べることによって気密検査を行うようにしてもよ
い。In this embodiment, the closed space 20 is filled with air. However, the airtightness may be checked by filling the space with water instead of air and examining fluctuations in water pressure.
【００２２】また、この実施例では、閉空間２０を加圧
するようにしているが、真空ポンプを用いて閉空間２０
を大気圧からたとえば０．０５〜０．０８ＭＰａ程度減
圧して気密検査を行うようにしてもよい。この場合に
は、閉空間形成部材２２が破壊されても外方向へ飛散す
るおそれがないため、より安全に検査を行うことができ
る。Further, in this embodiment, the closed space 20 is pressurized.
May be reduced from atmospheric pressure by, for example, about 0.05 to 0.08 MPa to perform an airtightness inspection. In this case, even if the closed space forming member 22 is broken, there is no possibility that the closed space forming member 22 will scatter outside, so that the inspection can be performed more safely.
【００２３】また、減圧により気密検査を行う場合は、
図３に示すように、閉空間形成部材６４を軟質な材料を
用いて形成するようにしてもよい。閉空間形成部材６４
は、ゴムやポリエチレン等のような軟質材料からなるシ
ート状の本体６６を含む。本体６６の形状はたとえば長
方形であり、本体６６の大きさは管接合部１８を包み込
むことができる程度に設定される。また、本体６６の幅
方向一方端部および他方端部には、ファスナ式シール６
８を構成する突条および条溝が形成される。また、本体
６６の中央部には、ポンプ用接続口７０および圧力計用
接続口７２が形成される。In the case of performing an airtight inspection by decompression,
As shown in FIG. 3, the closed space forming member 64 may be formed using a soft material. Closed space forming member 64
Includes a sheet-shaped main body 66 made of a soft material such as rubber or polyethylene. The shape of the main body 66 is, for example, rectangular, and the size of the main body 66 is set to an extent that the main body 66 can wrap the pipe joint 18. A fastener seal 6 is provided at one end and the other end in the width direction of the main body 66.
The ridges and grooves forming 8 are formed. A pump connection port 70 and a pressure gauge connection port 72 are formed in the center of the main body 66.
【００２４】閉空間形成部材６４を用いて閉空間７４を
形成する際には、本体６６で管接合部１８を包み込んで
ファスナ式シール６８を閉じ、それによって、本体６６
を筒状にする。そして、本体６６の軸方向両端部すなわ
ち開口端部を絞り込み、この開口端部を、面ファスナバ
ンドやインシュロックタイ等のような締付具７６を用い
て、管１２および１４の外周面に固定する。When the closed space 74 is formed by using the closed space forming member 64, the main body 66 wraps the pipe joint 18 and closes the fastener seal 68, whereby the main body 66 is closed.
Into a tube. Then, both ends in the axial direction of the main body 66, that is, open ends are squeezed, and the open ends are fixed to the outer peripheral surfaces of the pipes 12 and 14 using a fastener 76 such as a hook-and-loop fastener or an insulated tie. .
【００２５】この実施例（図３）において、管接合部１
８の気密性を検査する際には、真空ポンプ７８を駆動し
て、閉空間７４を大気圧からたとえば０．０５〜０．０
８ＭＰａ程度減圧する。所定の圧力を得たら、真空ポン
プ７８を停止して、所定の時間（たとえば０．５〜１時
間程度）放置する。そして、上述した実施例（図１）と
同様に、圧力変動を検出して気密性の良否を判定する。In this embodiment (FIG. 3), the pipe joint 1
When inspecting the airtightness of the closed space 8, the vacuum pump 78 is driven to bring the closed space 74 from the atmospheric pressure to, for example, 0.05 to 0.0
The pressure is reduced by about 8 MPa. When a predetermined pressure is obtained, the vacuum pump 78 is stopped and left for a predetermined time (for example, about 0.5 to 1 hour). Then, similarly to the above-described embodiment (FIG. 1), pressure fluctuation is detected to determine whether airtightness is good or not.
【００２６】この実施例でも、特定個所の管接合部１８
だけに対して、簡単に気密検査を行うことができる。Also in this embodiment, the pipe joint 18 at a specific location
Only for this, an airtight inspection can be performed.
【００２７】なお、図１および図３実施例では、この発
明を電気融着継手１６を用いた管接合部１８に対して使
用しているが、この発明は、メカニカル継手やゴム輪接
合継手等を用いた他の形式の管接合部１８に対してもそ
のまま使用することができる。In the embodiments shown in FIGS. 1 and 3, the present invention is applied to a pipe joint 18 using an electro-fusion joint 16, but the present invention is not limited to a mechanical joint, a rubber ring joint and the like. It can be used as it is for other types of pipe joints 18 using.
【図１】この発明の一実施例を示す図解図である。FIG. 1 is an illustrative view showing one embodiment of the present invention;
【図２】図１実施例の閉空間形成部材を示す分解斜視図
である。FIG. 2 is an exploded perspective view showing the closed space forming member of FIG. 1 embodiment.
【図３】この発明の他の実施例を示す図解図である。FIG. 3 is an illustrative view showing another embodiment of the present invention;
１０ …管接合部の気密検査装置 １８ …管接合部 ２０、７４ …閉空間 ２２、６４ …閉空間形成部材 ２４ …ポンプ ２６ …圧力計 ２８ …第１部材 ３０ …第２部材 ３８ …ボルト・ナット ４６、５６ …ゴムシール材 ６６ …本体 ６８ …ファスナ式シール ７６ …締付具 ７８ …真空ポンプ DESCRIPTION OF SYMBOLS 10 ... Air-tightness inspection device of pipe joint 18 ... Pipe joint 20,74 ... Closed space 22,64 ... Closed space forming member 24 ... Pump 26 ... Pressure gauge 28 ... First member 30 ... Second member 38 ... Bolt / nut 46, 56 ... rubber seal material 66 ... body 68 ... fastener type seal 76 ... fastening tool 78 ... vacuum pump
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大室 秀樹 大阪府堺市石津北町64番地 株式会社クボ タビニルパイプ工場内 (72)発明者 渋谷 昭哉 大阪府堺市石津北町64番地 株式会社クボ タビニルパイプ工場内 (72)発明者 渡部 裕嗣 大阪府堺市石津北町64番地 株式会社クボ タビニルパイプ工場内 Ｆターム(参考） 2G067 AA15 DD02 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideki Omuro 64 Ishizu-Kitamachi, Sakai-shi, Osaka Inside the Kubota Vinyl Pipe Plant Co., Ltd. (72) Inventor Akiya Shibuya 64 Ishizu-Kitacho, Sakai-shi, Osaka Kubo Tabyline Pipe Plant (72) Inventor Yuji Watanabe 64 Ishizu-Kitacho, Sakai City, Osaka Prefecture Kubota Vinyl Pipe Factory F-term (reference) 2G067 AA15 DD02
Claims (2)
合部の気密性を検査する、管接合部の気密検査方法。1. A closed space is provided around a pipe joint, the closed space is pressurized or depressurized to a predetermined pressure, and the closed space is left to stand. By detecting a pressure change in the closed space, the airtightness of the pipe joint is detected. An airtightness inspection method for pipe joints to check the airtightness.
形成部材、 前記閉空間を加圧または減圧するポンプ、および前記閉
空間の圧力を測定する圧力測定手段を備える、管接合部
の気密検査装置。2. A pipe joint comprising a closed space forming member for forming a closed space around a pipe joint, a pump for pressurizing or depressurizing the closed space, and a pressure measuring means for measuring a pressure in the closed space. Airtight inspection equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11237734A JP2001059794A (en) | 1999-08-25 | 1999-08-25 | Method and device for inspecting airtightness of pipe joint part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11237734A JP2001059794A (en) | 1999-08-25 | 1999-08-25 | Method and device for inspecting airtightness of pipe joint part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001059794A true JP2001059794A (en) | 2001-03-06 |
Family
ID=17019695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11237734A Pending JP2001059794A (en) | 1999-08-25 | 1999-08-25 | Method and device for inspecting airtightness of pipe joint part |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001059794A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7401499B2 (en) | 2005-08-12 | 2008-07-22 | Gtr Tec Corporation | Apparatus for permeability analysis |
| KR101728064B1 (en) * | 2015-09-10 | 2017-05-02 | 주식회사 세전더블유엠에스 | Apparatus for electro-fusion of polyethylene pipes having leakage test module |
| CN111829731A (en) * | 2020-07-23 | 2020-10-27 | 中国原子能科学研究院 | Test device and method for verifying sealing performance of flange connection |
| WO2020251370A1 (en) * | 2019-06-12 | 2020-12-17 | Eagle Safety System As | Apparatus, system and method for maintenance of a structure carrying a fluid |
| KR102520381B1 (en) | 2022-12-13 | 2023-04-11 | 주식회사 세전더블유엠에스 | Electrofusion fitting device for checking insertion depth pipe |
| CN117073932A (en) * | 2023-08-25 | 2023-11-17 | 连云港华港电力设备有限公司 | Leakage detection device for heat exchange tube of condenser and use method of leakage detection device |
-
1999
- 1999-08-25 JP JP11237734A patent/JP2001059794A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7401499B2 (en) | 2005-08-12 | 2008-07-22 | Gtr Tec Corporation | Apparatus for permeability analysis |
| KR101728064B1 (en) * | 2015-09-10 | 2017-05-02 | 주식회사 세전더블유엠에스 | Apparatus for electro-fusion of polyethylene pipes having leakage test module |
| WO2020251370A1 (en) * | 2019-06-12 | 2020-12-17 | Eagle Safety System As | Apparatus, system and method for maintenance of a structure carrying a fluid |
| CN113853516A (en) * | 2019-06-12 | 2021-12-28 | 普罗森斯有限公司 | Apparatus, system and method for maintaining fluid-carrying structures |
| AU2020294087B2 (en) * | 2019-06-12 | 2023-08-31 | Prosence As | Apparatus, system and method for maintenance of a structure carrying a fluid |
| CN111829731A (en) * | 2020-07-23 | 2020-10-27 | 中国原子能科学研究院 | Test device and method for verifying sealing performance of flange connection |
| CN111829731B (en) * | 2020-07-23 | 2022-03-11 | 中国原子能科学研究院 | Test device and method for verifying sealing performance of flange connection |
| KR102520381B1 (en) | 2022-12-13 | 2023-04-11 | 주식회사 세전더블유엠에스 | Electrofusion fitting device for checking insertion depth pipe |
| CN117073932A (en) * | 2023-08-25 | 2023-11-17 | 连云港华港电力设备有限公司 | Leakage detection device for heat exchange tube of condenser and use method of leakage detection device |
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