JPH06273258A - Method and device for evaluating negative pressure type airtightness in equipment piping - Google Patents
Method and device for evaluating negative pressure type airtightness in equipment pipingInfo
- Publication number
- JPH06273258A JPH06273258A JP8546093A JP8546093A JPH06273258A JP H06273258 A JPH06273258 A JP H06273258A JP 8546093 A JP8546093 A JP 8546093A JP 8546093 A JP8546093 A JP 8546093A JP H06273258 A JPH06273258 A JP H06273258A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cap member
- airtightness
- air
- suction device
- 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】本発明は、建築物内の設備配管の
継手部分の気密性評価方法及びこれに適用する気密性評
価装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airtightness evaluation method for a joint portion of equipment piping in a building and an airtightness evaluation apparatus applied to the method.
【０００２】[0002]
【従来の技術】従来、建築物の設備配管の継手部分から
の漏水事故等を未然に防ぐために、施工段階で設備配管
の漏れ試験を行っている。漏れ試験は、一般に加圧され
た水又は空気を使用して行っている。水を使用する場合
は、加圧水を設備配管に圧送して一定圧で封じ込め、一
昼夜放置して配管内の水圧の低下の有無を確認し、設備
配管の継手部分の気密性の良否を判断している。また、
空気を使用する場合は、圧縮機で加圧した空気を設備配
管内に圧送し、配管内の気圧を一定圧まで上げて封じ込
め、一定時間経過後の設備配管内の圧力低下の有無によ
り気密性を評価している。2. Description of the Related Art Conventionally, in order to prevent a water leakage accident from a joint portion of equipment piping of a building, a leakage test of equipment piping is conducted at a construction stage. Leak tests are generally performed using pressurized water or air. When using water, pressurize pressurized water to the equipment pipes and confine it at a constant pressure, leave it for a day and night to check if the water pressure in the piping has dropped, and judge whether the airtightness of the joints of the equipment pipes is good or bad. There is. Also,
When air is used, the air compressed by the compressor is pumped into the equipment piping, the air pressure inside the piping is raised to a certain pressure and contained, and the airtightness is determined by the presence or absence of pressure drop in the equipment piping after a certain period of time. Is being evaluated.
【０００３】[0003]
【発明が解決しようとする課題】従来の加圧水を使用す
る方法では、設備配管の継手部分に気密性不良の箇所が
あると、その箇所から漏水が生じ、施工段階で既に仕上
がっている床や天井等を濡らしてしまうという問題があ
った。さらに、この加圧水を使用する漏れ試験では、水
の供給設備を整えなければならずかなり面倒であった。
また、空気を使用する場合は、加圧空気を設備配管中に
送り込むため、気密不良箇所では加圧空気が噴出して危
険であった。In the conventional method of using pressurized water, if there is a portion where the airtightness is poor in the joint portion of the equipment piping, water leaks from that portion, and floors or ceilings already finished at the construction stage, etc. There was a problem of getting wet. Furthermore, in the leak test using this pressurized water, the water supply equipment had to be prepared, which was quite troublesome.
Further, when air is used, the pressurized air is sent into the facility piping, so that the pressurized air is jetted out at a location where airtightness is poor, which is dangerous.
【０００４】そこで本発明は、上記問題点に鑑み、加圧
水や加圧空気を使用しない気密性評価方法と、これに適
した気密性評価装置の提供を目的とした。In view of the above problems, it is an object of the present invention to provide an airtightness evaluation method that does not use pressurized water or air, and an airtightness evaluation apparatus suitable for this method.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に、設備配管の継手部分等での漏水事故等を未然に防ぐ
ために行う漏れ試験に適用する気密性評価方法におい
て、漏れ試験を行う配管の末端に通気管の一端を空気漏
れのないように取り付け、通気管の途中を分岐管を介し
て圧力計に連通し、通気管の他端を空気吸引装置に接続
して、空気吸引装置により配管内の空気を排気して配管
内を一定の負圧状態にし、その後空気吸引装置を停止し
て通気管内に設けた逆止弁を閉じ、所定時間配管内をそ
のままの負圧状態にし、所定時間経過後の圧力計の示す
圧力変化により配管の継手部分の気密性不良を判定す
る。[Means for Solving the Problems] In order to achieve the above-mentioned object, a pipe for performing a leak test in an airtightness evaluation method applied to a leak test performed to prevent a water leakage accident at a joint portion of equipment piping etc. Attach one end of the ventilation pipe to the end of the so that there is no air leakage, connect the middle of the ventilation pipe to the pressure gauge through the branch pipe, connect the other end of the ventilation pipe to the air suction device, and use the air suction device. The air in the pipe is exhausted to bring the inside of the pipe to a constant negative pressure state, after which the air suction device is stopped and the check valve provided in the ventilation pipe is closed, and the inside of the pipe is kept in the negative pressure state for a predetermined time. The airtightness of the joint part of the pipe is judged by the pressure change indicated by the pressure gauge after the passage of time.
【０００６】また、設備配管の継手部分等での漏水事故
等を未然に防ぐために行う漏れ試験に使用する気密性評
価装置において、一端が設備配管内に挿入され、他端が
空気吸引装置に連通される通気管の中間外周に設備配管
外端に嵌合される弾性材からなるキャップ部材が設けら
れ、キャップ部材より空気吸引装置への連通側の通気管
部分が、途中活栓を有する分岐管を介して圧力計に連通
され、通気管の前記分岐管連通位置と空気吸引装置への
連通側端部との間に逆止弁が設けられている。Further, in an airtightness evaluation apparatus used for a leak test to prevent a water leakage accident at a joint portion of equipment piping, etc., one end is inserted into the equipment piping and the other end communicates with an air suction device. A cap member made of an elastic material fitted to the outer end of the equipment pipe is provided on the middle outer circumference of the vent pipe to be installed, and the vent pipe portion on the communication side from the cap member to the air suction device is a branch pipe having a stopcock on the way. A check valve is provided between the branch pipe communicating position of the ventilation pipe and the end of the communicating side to the air suction device.
【０００７】本発明では、気密性評価用の設備配管の末
端に接続された通気管の一端を空気吸引装置に接続する
ことにより、配管内の空気を排気して配管内を負圧にす
ることができる。また、通気管の途中では通気管に連通
した分岐管が設けられ、分岐管の途中に活栓が設けら
れ、さらに分岐管の先端には圧力計が設けられているた
め、活栓を閉じた状態にして上記空気吸引装置による排
気を行うことにより、圧力計で配管内の負圧の状態を知
ることができる。また、通気管の分岐管連通位置と空気
吸引装置への連通側端部との間に逆止弁が設けられてい
るので、配管内を所定の負圧にした時点で排気を止める
ことにより、逆止弁が働き通気管が閉じ状態になり、負
圧にされた配管内に空気が逆流することがない。In the present invention, by connecting one end of the ventilation pipe connected to the end of the equipment pipe for airtightness evaluation to the air suction device, the air in the pipe is exhausted to make the inside of the pipe a negative pressure. You can In addition, a branch pipe communicating with the ventilation pipe is provided in the middle of the ventilation pipe, a stopcock is provided in the middle of the branch pipe, and a pressure gauge is provided at the tip of the branch pipe. When the air is sucked by the air suction device, the negative pressure inside the pipe can be detected by the pressure gauge. Further, since a check valve is provided between the branch pipe communication position of the ventilation pipe and the end on the communication side to the air suction device, by stopping the exhaust at the time when the inside of the pipe has a predetermined negative pressure, The check valve works and the ventilation pipe is closed, so that air does not flow back into the pipe under negative pressure.
【０００８】また、気密性の評価を終了した時点では、
分岐管の活栓を徐々に開けていくことにより配管内の圧
力を徐々に常圧に戻すことができる。さらに、キャップ
部材が弾性材で形成されているため、キャップ部材の内
側に配管の外端の管口をはめ、キャップ部材を側壁の弾
性材の有する圧迫力で外れにくいように被せることがで
きる。また、配管内部を負圧状態にすると、配管の管口
に接している弾性材で形成されているキャップ部材の平
面部が配管側に吸着されて密着し、配管末端の通気管の
接続部分の気密性が保たれる。When the airtightness evaluation is completed,
By gradually opening the stopcock of the branch pipe, the pressure in the pipe can be gradually returned to normal pressure. Further, since the cap member is made of an elastic material, it is possible to fit the cap member at the outer end of the pipe to the inside of the cap member and cover the cap member with the compression force of the elastic material of the side wall so as not to come off easily. In addition, when the inside of the pipe is placed in a negative pressure state, the flat portion of the cap member formed of an elastic material that is in contact with the pipe mouth is adsorbed and closely adhered to the pipe side, and the connecting portion of the ventilation pipe at the pipe end is connected. Airtightness is maintained.
【０００９】[0009]
【実施例】本実施例を図１により説明する。本発明に係
る負圧式気密性評価装置のキャップ部材１は、外周に側
壁１１を環状に有した円盤状に形成され、キャップ部材
１の円盤面の中心に直交する通気管２（後記する）に鍔
状に設けられている。キャップ部材１の環状の側壁１１
はキャップ部材１の中央に直交して設けられた通気管２
と同心円状になり、通気管２の外周に凹型の環状溝３を
形成している。このキャップ部材１の側壁１１の内径ｄ
を、予め設備配管に使用する規格の管口径に合わせてお
くことにより、配管Ａの末端の管口にキャップ部材１を
丁度被せることができるようになっている。EXAMPLE This example will be described with reference to FIG. The cap member 1 of the negative pressure type airtightness evaluation apparatus according to the present invention is formed in a disk shape having an annular side wall 11 on the outer circumference, and is provided in a ventilation pipe 2 (described later) orthogonal to the center of the disk surface of the cap member 1. It is provided in a brim. An annular side wall 11 of the cap member 1
Is a ventilation pipe 2 provided orthogonally to the center of the cap member 1.
And a concave annular groove 3 is formed on the outer circumference of the ventilation pipe 2. Inner diameter d of the side wall 11 of the cap member 1
By previously adjusting the pipe diameter to a standard pipe diameter to be used for facility piping, the cap member 1 can be just covered on the terminal pipe opening of the pipe A.
【００１０】本実施例の上記キャップ部材１及び通気管
２は、硬質のゴムで一体に成型されている。そのため、
上記キャップ部材１を設備配管Ａの管口に被せたとき、
側壁１１の弾性材の圧迫力により配管Ａの管壁を挟み込
み外れにくいようになっている。キャップ部材１は弾性
材で肉厚に形成され、気密性評価時の負圧により変形や
歪みが発生しないようになっている。さらに、環状溝３
の凹型の底面は、配管Ａ端面に密接できるように平らに
形成されている。The cap member 1 and the ventilation pipe 2 of this embodiment are integrally molded of hard rubber. for that reason,
When the cap member 1 is put on the pipe opening of the equipment pipe A,
The compression force of the elastic material of the side wall 11 makes it difficult for the pipe wall of the pipe A to be pinched and come off. The cap member 1 is made of an elastic material with a large thickness so that deformation or distortion does not occur due to negative pressure during airtightness evaluation. Furthermore, the annular groove 3
The bottom surface of the concave type is formed flat so as to be in close contact with the end surface of the pipe A.
【００１１】キャップ部材１に直交するように一体に設
けられた通気管２も、気密性評価時の高い負圧により歪
みや変形等が生じないように管壁が弾性材で肉厚に形成
され、通気管２内部の中央に通気路２１が形成されてい
る。キャップ部材１の環状の側壁１１が設けられた側
（以下、キャップ部材１の裏側という。）に出ている通
気管２の外径は、通気管２が配管Ａ内に挿入できるよう
に配管Ａの口径よりも少し小さ目に設定されている。ま
た、キャップ部材１の裏側に出ている通気管２の長さ
は、側壁１１の高さより長く設定されている。In the ventilation pipe 2 which is integrally provided so as to be orthogonal to the cap member 1, the pipe wall is made of an elastic material so as to have a thick wall so as not to be distorted or deformed due to a high negative pressure during airtightness evaluation. A ventilation path 21 is formed in the center of the ventilation pipe 2. The outer diameter of the ventilation pipe 2 protruding on the side where the annular side wall 11 of the cap member 1 is provided (hereinafter, referred to as the back side of the cap member 1) is determined so that the ventilation pipe 2 can be inserted into the pipe A. It is set slightly smaller than the caliber of. In addition, the length of the ventilation pipe 2 protruding on the back side of the cap member 1 is set to be longer than the height of the side wall 11.
【００１２】一方、キャップ部材１の環状の側壁１１の
設けられていない側（以下、キャップ部材１の表側とい
う。）に出ている通気管２は、その先端がコンプレッサ
ーに接続した高圧ホースＢに差し込むことができるよう
に少し細めに設定されている。 但し、キャップ部材１
に直交する通気管２内を貫通する通気路２１の口径は一
定になっている。On the other hand, the vent pipe 2 protruding to the side of the cap member 1 where the annular side wall 11 is not provided (hereinafter referred to as the front side of the cap member 1) is connected to the high pressure hose B connected to the compressor. It is a little narrower so that you can insert it. However, the cap member 1
The diameter of the ventilation path 21 penetrating the inside of the ventilation pipe 2 orthogonal to is constant.
【００１３】キャップ部材１の表側に出ている通気管２
には、キャップ部材１から少し離れた位置に、通気管２
の側方から通気管２内の通気路２１に垂直に連通した分
岐管４が設けられている。分岐管４の途中には、分岐管
４内へ外部からの空気を給気・遮断できるように活栓５
が設けられている。分岐管４の先端には内径に雌ネジが
切られたブッシュ４１が設けられ、圧力計６下部の雄ネ
ジが切られた接続管６１により、分岐管４の先端に圧力
計６が設けられている。また、通気路２１の上記分岐管
４が分岐した位置と高圧ホースＢに接続する通気路２１
の末端との間に、逆止弁７が設けられている。逆止弁７
は、通気管２中の通気路２１をキャップ部材１の裏側か
ら表側へ抜ける空気は通し（図中に矢印で示した）、そ
の逆方向の流れは遮断できるように設けられている。Vent pipe 2 protruding from the front side of the cap member 1.
At a position slightly away from the cap member 1, the ventilation pipe 2
A branch pipe 4 that vertically communicates with a ventilation path 21 in the ventilation pipe 2 is provided from the side. A stopcock 5 is provided in the middle of the branch pipe 4 so that air from the outside can be supplied to and blocked from the branch pipe 4.
Is provided. A bush 41 having an internal thread on the inner diameter is provided at the end of the branch pipe 4, and a pressure gauge 6 is provided at the end of the branch pipe 4 by a connection pipe 61 at the lower part of the pressure gauge 6 having a male thread. There is. In addition, the ventilation passage 21 connecting the position where the branch pipe 4 of the ventilation passage 21 is branched and the high pressure hose B
A check valve 7 is provided between the check valve 7 and the end. Check valve 7
Is provided so that the air passing through the ventilation passage 21 in the ventilation pipe 2 from the back side of the cap member 1 to the front side is passed through (indicated by an arrow in the figure) and the flow in the opposite direction can be blocked.
【００１４】尚、逆止弁７は通常は通気路２１を遮断し
ており、強制排気により通気路２１を空気がキャップ部
材１の裏側から表側に抜けるとき、その方向に空気圧で
押されて持ち上げられ開くようになっている。また、強
制排気が終了して空気の流れがなくなると、持ち上げら
れていた逆止弁７は自然に下がり、通気路２１を遮断す
ることができるようになっている。この逆止弁７の動き
を図の矢印で示した。さらに、通気管２の先端周囲には
突設した３本のリング部材２２が隣接して設けられ、高
圧ホースＢに挿入した通気管２の先端部分が抜けにくい
ようになっている。The check valve 7 normally shuts off the ventilation passage 21. When the air escapes from the back side of the cap member 1 to the front side of the ventilation passage 21 by forced exhaust, the check valve 7 is pushed by air pressure in that direction and lifted. It is designed to open. Further, when the forced exhaust is finished and the air flow is stopped, the lifted check valve 7 is naturally lowered, and the air passage 21 can be shut off. The movement of the check valve 7 is shown by an arrow in the figure. Further, three protruding ring members 22 are provided adjacent to each other around the tip of the ventilation pipe 2 so that the tip portion of the ventilation pipe 2 inserted into the high-pressure hose B is hard to come off.
【００１５】本発明に係る負圧式気密性評価方法を、上
記構成の負圧式気密性評価装置を気密性評価用の配管Ａ
に以下のように接続したものに適用した。圧力計６は分
岐管４の先端のブッシュ４１に接続され、キャップ部材
１の表側に出ている通気管２の先端は、先端周囲に突設
したリング状部材２２が隠れるまで、コンプレッサーに
接続された高圧ホースＢに差し込まれている。さらに、
リング状部材２２と接している高圧ホースＢの外周付近
を締めつけ金具Ｃで外れないように締めつけられてい
る。In the negative pressure type airtightness evaluation method according to the present invention, the negative pressure type airtightness evaluation device having the above-mentioned structure is used for the pipe A for airtightness evaluation.
It was applied to those connected as follows. The pressure gauge 6 is connected to the bush 41 at the tip of the branch pipe 4, and the tip of the ventilation pipe 2 protruding to the front side of the cap member 1 is connected to the compressor until the ring-shaped member 22 protruding around the tip is hidden. Plugged into the high pressure hose B. further,
The high pressure hose B, which is in contact with the ring-shaped member 22, is fastened around the outer periphery of the high pressure hose B with a fastening member C so as not to come off.
【００１６】その後、気密性評価が必要な設備配管Ａの
末端の管口から、前記キャップ部材１の裏側に出ている
通気管２を配管Ａの中に挿入し、同時に通気管２の周囲
に形成されているキャップ部材１の側壁１１に気密性評
価用の配管Ａの管口を嵌め込んでキャップ部材１が被せ
られている。このようにして負圧式気密性評価装置を接
続した後、活栓５を開いて、コンプレッサーにて設備配
管Ａ内の空気を排気する。排気の状態は圧力計６で確認
し、所定の負圧状態になった時点で排気を停止する。排
気が停止された時点で、通気管２の通気路２１は逆止弁
７で空気が逆流しないように塞がれている。After that, the ventilation pipe 2 projecting from the back side of the cap member 1 is inserted into the pipe A from the pipe opening at the end of the equipment pipe A which requires airtightness evaluation, and at the same time around the ventilation pipe 2. The cap member 1 is covered by fitting the pipe opening of the pipe A for airtightness evaluation into the side wall 11 of the formed cap member 1. After connecting the negative pressure type airtightness evaluation device in this way, the stopcock 5 is opened and the air in the equipment pipe A is exhausted by the compressor. The state of exhaust is confirmed by the pressure gauge 6, and the exhaust is stopped when a predetermined negative pressure is reached. At the time when the exhaust is stopped, the ventilation passage 21 of the ventilation pipe 2 is blocked by the check valve 7 so that the air does not flow backward.
【００１７】その後、一定時間そのままの状態で置き、
所要時間経過後に圧力計６で負圧の状態に変化があるか
否か確認する。このとき変化がなければ、配管Ａ内の気
密性は良好と判定することができる。また、判定終了後
は、通気管２の先端からコンプレッサーに接続した高圧
ホースＢを外し、活栓５を開いて外から空気を分岐管４
を介して負圧状態の設備配管Ａ内に空気を導入して常圧
に戻す。After that, leave it as it is for a certain period of time,
After the required time has elapsed, the pressure gauge 6 confirms whether or not the negative pressure state has changed. If there is no change at this time, it can be determined that the airtightness in the pipe A is good. After completion of the determination, the high pressure hose B connected to the compressor is removed from the tip of the ventilation pipe 2, the stopcock 5 is opened, and air is diverted from the outside to the branch pipe 4.
Air is introduced into the equipment pipe A in a negative pressure state via the to return to normal pressure.
【００１８】本発明は上記実施例に限定されず、本実施
例ではキャップ部材１、側壁１１及び通気管２を一体に
硬質ゴムで成型したが、通気管２に鍔状に設けられたキ
ャップ部材１及び側壁１１は弾性材で形成し、通気管２
は金属製としても構わない。The present invention is not limited to the above embodiment, and in this embodiment, the cap member 1, the side wall 11 and the ventilation pipe 2 are integrally molded of hard rubber. However, the ventilation pipe 2 is provided with a brim-like cap member. 1 and the side wall 11 are made of an elastic material, and the ventilation pipe 2
May be made of metal.
【００１９】[0019]
【発明の効果】本発明により、従来とは異なり配管内に
加圧水や加圧空気を送らないで、設備配管の継手部分の
気密性の評価ができるため、配管内の気密性の不良箇所
があった場合の漏水や加圧空気の噴出等による不測の事
故を防ぐことができる。また、加圧水を使用する気密性
評価方法では水の供給設備が必要であるが、本発明では
水の供給設備のないところでも適用することができる。EFFECTS OF THE INVENTION According to the present invention, unlike the prior art, it is possible to evaluate the airtightness of the joint portion of the equipment pipe without sending pressurized water or pressurized air into the pipe. It is possible to prevent unexpected accidents due to water leaks, jetting of pressurized air, etc. Further, the airtightness evaluation method using pressurized water requires water supply equipment, but the present invention can also be applied where there is no water supply equipment.
【図１】本発明に係る気密性評価装置の使用状況の要部
を断面で示した説明図。FIG. 1 is an explanatory view showing a cross section of a main part of a usage state of an airtightness evaluation apparatus according to the present invention.
１ キャップ部材 ２ 通気管 ３ 環状溝 ４ 分岐管 ５ 活栓 ６ 圧力計 ７ 逆止弁 Ａ 配管 Ｂ 高圧ホース 1 Cap member 2 Vent pipe 3 Annular groove 4 Branch pipe 5 Stopcock 6 Pressure gauge 7 Check valve A Piping B High pressure hose
Claims (2)
未然に防ぐために行う漏れ試験に適用する気密性評価方
法において、漏れ試験を行う配管の末端に通気管の一端
を空気漏れのないように取り付け、通気管の途中を分岐
管を介して圧力計に連通し、通気管の他端を空気吸引装
置に接続して、空気吸引装置により配管内の空気を排気
して配管内を一定の負圧状態にし、その後空気吸引装置
を停止して通気管内に設けた逆止弁を閉じ、所定時間配
管内をそのままの負圧状態にし、所定時間経過後の圧力
計の示す圧力変化により配管の継手部分の気密性不良を
判定することを特徴とする負圧式気密性評価方法。1. In an airtightness evaluation method applied to a leak test performed to prevent a water leakage accident at a joint portion of facility piping, etc., one end of a vent pipe is not leaked to the end of the pipe subjected to the leak test. Attached, connect the middle of the ventilation pipe to the pressure gauge via the branch pipe, connect the other end of the ventilation pipe to the air suction device, and exhaust the air in the pipe by the air suction device to keep the inside of the pipe constant. After that, the air suction device is stopped, the check valve provided in the ventilation pipe is closed, the inside of the pipe is kept in the negative pressure state for a predetermined time, and the pipe changes according to the pressure change indicated by the pressure gauge after the predetermined time. Negative pressure type airtightness evaluation method, characterized in that the airtightness of the joint part is judged.
未然に防ぐために行う漏れ試験に使用する気密性評価装
置において、一端が設備配管内に挿入され、他端が空気
吸引装置に連通される通気管の中間外周に設備配管外端
に嵌合される弾性材からなるキャップ部材が設けられ、
キャップ部材より空気吸引装置への連通側の通気管部分
が、途中活栓を有する分岐管を介して圧力計に連通さ
れ、通気管の前記分岐管連通位置と空気吸引装置への連
通側端部との間に逆止弁が設けられていることを特徴と
する負圧式気密性評価装置。2. An airtightness evaluation device used for a leak test for preventing water leakage accidents, etc. at a joint part of equipment piping, wherein one end is inserted into equipment piping and the other end communicates with an air suction device. A cap member made of an elastic material fitted to the outer end of the equipment pipe is provided on the middle outer periphery of the ventilation pipe,
The ventilation pipe portion on the communication side from the cap member to the air suction device is communicated with the pressure gauge via a branch pipe having an intermediate stopcock, and the branch pipe communication position of the ventilation pipe and the communication side end portion to the air suction device. A negative pressure type airtightness evaluation device, characterized in that a check valve is provided between the two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8546093A JPH06273258A (en) | 1993-03-19 | 1993-03-19 | Method and device for evaluating negative pressure type airtightness in equipment piping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8546093A JPH06273258A (en) | 1993-03-19 | 1993-03-19 | Method and device for evaluating negative pressure type airtightness in equipment piping |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06273258A true JPH06273258A (en) | 1994-09-30 |
Family
ID=13859499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8546093A Pending JPH06273258A (en) | 1993-03-19 | 1993-03-19 | Method and device for evaluating negative pressure type airtightness in equipment piping |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06273258A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011203230A (en) * | 2010-03-25 | 2011-10-13 | Katsuji Yasumitsu | Lifting pump, and versatile adsorption vacuum tester for water absorption piping vacuum state diagnosis |
| KR20130005391U (en) * | 2012-03-06 | 2013-09-16 | 대우조선해양 주식회사 | Apparatus for checking installation state of pipeline valve |
| KR102066705B1 (en) * | 2019-06-14 | 2020-01-15 | (주)오리엔탈정공 | Leakage inspection apparatus for intake line of engine |
| JP2020056619A (en) * | 2018-09-28 | 2020-04-09 | 丸一株式会社 | Joint member for inspection and leakage inspection method for piping using the same |
-
1993
- 1993-03-19 JP JP8546093A patent/JPH06273258A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011203230A (en) * | 2010-03-25 | 2011-10-13 | Katsuji Yasumitsu | Lifting pump, and versatile adsorption vacuum tester for water absorption piping vacuum state diagnosis |
| KR20130005391U (en) * | 2012-03-06 | 2013-09-16 | 대우조선해양 주식회사 | Apparatus for checking installation state of pipeline valve |
| JP2020056619A (en) * | 2018-09-28 | 2020-04-09 | 丸一株式会社 | Joint member for inspection and leakage inspection method for piping using the same |
| KR102066705B1 (en) * | 2019-06-14 | 2020-01-15 | (주)오리엔탈정공 | Leakage inspection apparatus for intake line of engine |
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