WO2020009260A1 - Procédé de nettoyage de tuyau d'eau de robinet - Google Patents

Procédé de nettoyage de tuyau d'eau de robinet Download PDF

Info

Publication number
WO2020009260A1
WO2020009260A1 PCT/KR2018/007758 KR2018007758W WO2020009260A1 WO 2020009260 A1 WO2020009260 A1 WO 2020009260A1 KR 2018007758 W KR2018007758 W KR 2018007758W WO 2020009260 A1 WO2020009260 A1 WO 2020009260A1
Authority
WO
WIPO (PCT)
Prior art keywords
water pipe
washing
pressure
water
pipe
Prior art date
Application number
PCT/KR2018/007758
Other languages
English (en)
Korean (ko)
Inventor
김병준
전연자
Original Assignee
김병준
전연자
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 김병준, 전연자 filed Critical 김병준
Publication of WO2020009260A1 publication Critical patent/WO2020009260A1/fr

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/02—Plumbing installations for fresh water
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/30—Devices to facilitate removing of obstructions in waste-pipes or sinks
    • E03C1/304—Devices to facilitate removing of obstructions in waste-pipes or sinks using fluid under pressure
    • E03C1/306—Devices to facilitate removing of obstructions in waste-pipes or sinks using fluid under pressure by means of a tube connected to the water mains
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
    • E03B7/00—Water main or service pipe systems

Definitions

  • the present invention relates to a method for washing a water pipe, and more particularly, to a pipe washing method for washing the inside of a water pipe using washing water and high pressure nitrogen to remove foreign substances such as scale accumulated on the inner wall of the water pipe.
  • the water pipe serves as a passage for guiding and moving water to a predetermined place, and is installed in a form of buried or mainly embedded in the interior, floor or wall of the building.
  • Such water pipes when prolonged use of oxygen and water (moisture) in the air, oxidizes and corrodes the outer wall, and forms various scales by sticking to the inner wall, and these scales solidify over time. This will cause the flow path to be narrowed.
  • the flow passage cross-sectional area of the water pipe is reduced due to the scale, and thus the fluid is not smoothly moved, so that the water pipe cannot function as designed, and in some cases, the water pipe may be damaged by the moving pressure of the fluid.
  • the water pressure of the washing water injected into the water pipe may be increased in order to improve the washing efficiency of the water pipe, but in this case, the water pipe may be damaged due to the strong pressure of the washing water. Damage can occur more easily, and there are also leaks that significantly reduce the pipe cleaning effect.
  • the present invention is to solve the problems of the prior art as described above, an object of the present invention is to efficiently remove the scale and foreign matter inside the water pipe by using high pressure nitrogen and washing water.
  • Another object of the present invention is to confirm in advance whether or not leaking water pipes to increase the washing effect.
  • Still another object of the present invention is to allow even washing to the inside of a long length of water pipe.
  • the present invention in the water pipe washing method for removing foreign matter in the water pipe, connected to a pressure vessel containing high pressure nitrogen pressure of the pressure vessel
  • the first discharge step of injecting nitrogen gas of 3 ⁇ 5kgf / cm2 into the water pipe for 7 to 10 seconds to the water pipe washing device to supply by adjusting the pressure, the pipe for detecting whether the pressure drop in the first discharge step
  • 55 kgf / cm2 to 70kgf / cm2 of nitrogen gas is continuously injected for 4 to 6 minutes to the inside of the water pipe by using the pressure vessel.
  • the pressure vessel is composed of a plurality of plurality of pressure vessels are connected to each of the plurality of water pipe washing apparatus and then integrated into one adapter Is connected to the inlet of the water pipe, the water pipe washing device receives the washing water from the high pressure nitrogen and the washing water supply means through the pressure vessel, at least any one of the high pressure nitrogen or the washing water supply means to supply the water pipe do.
  • the adapter includes a main body coupled to the inlet of the water pipe, and a connection arm which protrudes in different directions from the main body and is connected to one end of a supply tube connected to the water pipe washing device.
  • the pipe inspection step is calculated using the pressure size and the injection time in the water pipe increases by the high-pressure nitrogen gas injected, whether the pressure size is directly proportional to the injection time for a predetermined time, and the pressure of the water pipe If it increases and then decreases, it is examined through the time until it starts to decrease.
  • supplying the washing water to the water pipe further includes a residue removing step of removing foreign matter remaining in the water pipe.
  • the water pipe washing apparatus is connected to the washing water supply means, the washing water supply unit for supplying the washing water into the pipe, the high pressure nitrogen supply unit for supplying high pressure nitrogen to the inside of the pipe connected to the pressure vessel, the water pipe It is connected to the washing water supply unit or the high pressure nitrogen supply and the washing water and the high pressure nitrogen to the discharge pipe for supplying selectively to the water pipe is configured, the washing water supply and the high pressure nitrogen supply is provided with a check valve, respectively, A pressure control valve may be provided at a position adjacent to the discharge tube to adjust the pressure of the high pressure nitrogen discharged through the discharge tube.
  • the washing rate is improved compared to the washing by the general washing water, and the nitrogen can be injected at a higher pressure than the simple washing water, thereby enabling more efficient washing.
  • the leakage of the pipe is measured through the pressure measurement after the first stage injection, the abnormality of the pipe can be checked in advance. You can check the pipe condition and clean it again after repair. Therefore, there is an effect that can prevent the washing efficiency is lowered by washing the leaked pipe.
  • the present invention can predict the leak position of the pipe to some extent through the time when the pressure increases after the high-pressure nitrogen is injected and then falls again, thereby improving the maintenance convenience of the pipe.
  • a plurality of nitrogen supply means can be connected to the adapter to stably supply nitrogen at a high pressure, so that a longer and larger diameter pipe can be washed. Therefore, the present invention can be applied to a pipe of more various standards, there is a high compatibility effect.
  • 1 is a photograph showing the inlet portion of the pipe is washed by the water pipe washing method according to the present invention.
  • Figure 2 is a photograph showing a plurality of supply tubes connected to the inlet of the pipe of Figure 1;
  • Figure 3 is a photograph showing a state connected to a plurality of water pipe washing apparatus used in the water pipe washing method according to the present invention.
  • Figure 4 is a photograph showing a state in which the high pressure nitrogen supply means (pressure vessel) used in the present invention is connected.
  • FIG. 5 is a perspective view showing the configuration of one embodiment of the water pipe washing device shown in FIG.
  • Figure 6a and Figure 6b is a graph showing the cleaning efficiency in the water pipes according to each of the gradually increasing the pressure of the high pressure nitrogen injected into the water pipes of different lengths using the water pipe washing method according to the present invention.
  • Figure 7 is a state comparing the state before washing the state of washing the inside of the water pipe using the water pipe washing method according to the present invention.
  • Figure 1 is an inlet portion of the pipe is washed by the water pipe cleaning method according to the present invention
  • Figure 2 is a collection of a plurality of supply tubes (H) connected to the inlet of the pipe in FIG.
  • the adapter 10 is coupled to the inlet 1 of the water pipe.
  • the adapter 10 is to receive a high-pressure nitrogen at the same time a plurality of water pipe washing device to be described below, the supply tube (H) extending from the discharge pipe of the water pipe washing device is coupled.
  • the adapter 10 is composed of a main body coupled to the inlet 1 of the water pipe, and a connecting arm 15 protruding from the main body.
  • the connection arm 15 is a plurality of protruding in different directions so that one end of the supply tube (H) connected in the water pipe washing device is coupled thereto. As the connecting arm 15 protrudes in different directions, the high pressure nitrogens supplied from the plurality of water pipe washing apparatuses may be smoothly supplied without interfering with each other.
  • 3 is a view connected to a plurality of water pipe washing apparatus used in the water pipe washing method according to the present invention.
  • the water pipe washing device is to connect between the water pipe and the pressure vessel (P), by adjusting the supply amount or pressure of the high-pressure nitrogen gas supplied from the pressure vessel (P) to the water pipe To pass.
  • the water pipe washing apparatus including a washing water supply unit 400 for supplying the washing water and a high pressure nitrogen supply unit 500 for the supply of high pressure nitrogen, the main operation to control the supply of water and the high pressure nitrogen to the water pipes
  • the part 100 is provided.
  • a flow path is formed in the main operation unit 100 to guide the washing water through the washing water supply unit 400 and the high pressure nitrogen through the high pressure nitrogen supply unit 500 toward the discharge tube 190.
  • the discharge tube 190 is connected to the supply tube (H) to deliver the washing water or high pressure nitrogen to the water pipe.
  • the washing water supply unit 400 may be configured to include a storage tank and a pump or to be connected directly to the water supply so as to stably supply the washing water into the main operation unit 100.
  • the high pressure nitrogen supply unit 500 is for supplying a strong high pressure nitrogen into the main operation unit 100, consisting of a pressure vessel (P) containing high pressure nitrogen, or a nitrogen supply device such as a compressor is configured separately In this embodiment, the high pressure nitrogen is supplied from the pressure vessel (P).
  • Figure 4 is a high pressure nitrogen supply means used in the present invention a plurality of pressure vessel (P) is connected to each other.
  • a first check valve V2 is provided between the washing water supply unit 400 and the main operation unit 100 to prevent backflow, and also prevents backflow between the high pressure nitrogen supply unit 500 and the main operation unit 100.
  • the second check valve (V4) is provided for.
  • the main operation unit 100 has a pressure control valve (V5) for adjusting the pressure of the washing water and nitrogen supplied from the washing water supply unit 400 and the high-pressure nitrogen supply unit 500.
  • V5 a pressure control valve for adjusting the pressure of the washing water and nitrogen supplied from the washing water supply unit 400 and the high-pressure nitrogen supply unit 500.
  • the pressure control valve (V5) it is possible to adjust the pressure size of the washing water or high pressure nitrogen discharged to the discharge tube 190.
  • Reference numerals 600 and 700 are gauges showing the pressure supplied when the washing water and the high pressure nitrogen are supplied, respectively.
  • water pipes used in various buildings such as apartments, houses, buildings, etc. are used in various kinds, for example, PB pipe (polybutylene pipe), metal corrugated pipe, copper pipe, stainless steel pipe, PE (polyethylene) pipe, Excel pipe
  • PB pipe polybutylene pipe
  • metal corrugated pipe copper pipe
  • stainless steel pipe stainless steel pipe
  • PE polyethylene pipe
  • Excel pipe A wide variety of water pipes are used, such as (XL: crosslinked polyethylene pipes).
  • Such water pipes perform heating or hot water as the water flows through them, or perform a water supply function.
  • a water blocking step is performed to block a water supply unit for introducing water into the water pipe from the outside so that the water is no longer introduced into the water pipe.
  • the water pipe washing device is first connected to the inlet 1 of the water pipe.
  • the discharge pipe of the water pipe washing device is connected to the inlet 1 of the water pipe through the supply tube (H). More precisely, one end of the supply tube H is connected to the connection arm 15 of the adapter 10, and the other end is connected to the discharge tube.
  • the high pressure nitrogen supply unit 500 may be replaced by a pressure vessel P and a pressure valve connected thereto.
  • the pressure vessel P has a high pressure nitrogen gas therein and the pressure valve has one end thereof. It is connected to the pressure vessel (P) and the other end is connected to the water pipe can adjust the pressure of the nitrogen gas of the high pressure discharged from the pressure vessel (P).
  • the nitrogen gas inside the pressure vessel P is injected into the water pipe.
  • the pressure vessel P is filled with internal nitrogen N2, and the pressure test pressure is 250 kgf / cm 2.
  • the maximum pressure is 150kgf / cm2 and the container weight is 15kg and 47kg.
  • Nitrogen gas is injected into the water pipe using the pressure of the pressure valve connected to the nitrogen container (low pressure gauge: max. 60kgf / cm2).
  • a pipe inspection step of injecting nitrogen gas of 3 ⁇ 5kgf / cm 2 for 7 ⁇ 10 seconds into the water pipe is in progress.
  • the high-pressure nitrogen gas is introduced into the water pipe through the water pipe washing device, the water (water) remaining in the water pipe is discharged to the outside, and the inside of the water pipe is empty.
  • nitrogen washing is performed to inject a relatively high pressure nitrogen gas into the water pipe for a predetermined time, rather than the nitrogen gas of the first discharge step, to wash the inside of the water pipe.
  • the second discharging step is for washing the water pipe in earnest following the first discharging step, and using 55 kgf / cm 2 to 70 kgf / cm 2 nitrogen gas into the water pipe for 4 minutes to 6 minutes using the water pipe discharge device. Clean the inside of water pipe by continuous injection.
  • the pressure vessel (P) is composed of a plurality of pressure vessels (P) are each connected to a plurality of water pipe washing apparatus and then integrated into one adapter (10) to the inlet (1) of the water pipe Because of the connection, high-pressure nitrogen can be supplied uniformly and stably.
  • a water pipe 50m consisting of a copper pipe with a cross section of 15 cm2 was used, the pressure vessel (P) was filled with internal nitrogen (N2), the pressure test pressure was 250kgf / cm2, the maximum charging force was 150kgf / cm2, and the weight of the container (P).
  • the pressure was 15 kg and 47 kg, and the pressure of the pressure valve connected to the pressure vessel (P) (low pressure gauge: 42 kgf / cm2 maximum) was used. And ten of these pressure vessels P were connected using the adapter.
  • the pressure of nitrogen gas was increased from 5 kgf / cm 2 to 70 kgf / cm 2 in units of 10 kgf / cm 2, and then the washing efficiency was measured. The washing efficiency was then calculated from the amount of sludge removed.
  • the washing efficiency is increased in proportion to the pressure of the nitrogen gas can be seen to stop the increase at about 40kgf / cm2 as the increase is reduced at about 30kgf / cm2.
  • the pressure of the nitrogen gas is preferably about 55kgf / cm2 to 70kgf / cm2.
  • the state inside the pipe that is cleaned is based on the amount of sludge discharged and the preservation state of the final inner wall of the pipe.
  • the washing efficiency at that time was measured while increasing the pressure of nitrogen gas from 5 kgf / cm 2 to 70 kgf / cm 2 in units of 10 kgf / cm 2. The washing efficiency was then calculated from the amount of sludge removed.
  • the washing efficiency is increased in proportion to the pressure of the nitrogen gas can be seen to stop the increase at about 55kgf / cm2 as the increase decreases at about 40kgf / cm2.
  • the pressure of the nitrogen gas is preferably about 55kgf / cm2 to 70kgf / cm2.
  • the state inside the pipe that is cleaned is based on the amount of sludge discharged and the preservation state of the final inner wall of the pipe.
  • the pressure of the nitrogen gas at high pressure is preferably 0.6 M to 0.8 M kgf / cm 2.
  • 65 kgf / cm 2 of nitrogen gas is continuously injected for 5 minutes to clean the water pipe.
  • the second discharging step is preferably performed by repeatedly injecting the high-pressure nitrogen to one end and the other end of the water pipe in order. That is, the second discharging step is not repeated in one direction, it is more preferable in terms of washing efficiency made in both directions of the water pipe.
  • the residue removal step of removing foreign matter remaining in the water pipe is continued by supplying the washing water to the water pipe after the second discharge step.
  • the residue removal step is to supply the washing water into the water pipe through the washing water supply unit 400, to finally discharge the residue remaining in the water pipe separated from the inner wall of the water pipe in the second discharge step.
  • the pressure injected into the water pipe in the second discharge step is less than a predetermined standard washing step is required.
  • the preliminary washing step lowers the pressure of the high pressure nitrogen injected into the water pipe when the pressure injected into the water pipe is 45 kgf / cm 2 or less, and more precisely, the pressure of the nitrogen gas injected into the 20 kgf / cm 2 to 30 kgf / cm 2 gas is more precise. To lower it. This means that the sludge inside the water pipe is excessively wrapped so that the pipe is narrowed, so that the sludge is sequentially removed first by lowering the pressure.
  • the preliminary washing step 20 kgf / cm2 to 30kgf / cm2 of nitrogen gas is injected into the water pipe using the water pipe washing device, and at the same time, the washing water is repeatedly added to the water pipe 6kgf. / cm2 ⁇ 8kgf / cm2. Through this process, the foreign substances in the water pipe can be removed to some extent, and then the second discharge step is performed again.
  • FIG. 7 is a view of washing the water pipe using the water pipe washing method according to the present invention.
  • the water pipe before washing can be seen that the flow path area was 62.39mm 2 but increased 2.36 times to 147.36mm 2 after washing.
  • the water pipe used for the test is the steel pipe of the apartment constructed in 1988. As such, it can be seen that the water pipe washing method according to the present invention has a great effect on the washing of all water pipes regardless of the age of the water pipes.
  • water pipe washing using nitrogen gas and water pipe washing using air were compared.
  • water pipe washing using air caused leakage at the pipe joint when a pressure of about 10 kgf / cm 2 or more was applied.
  • the water pipe washing method according to the present invention is a stable and efficient washing method.
  • FIG. 8 to 12 is a test report showing the results of testing the water pipe washing method according to the present invention.
  • 11 is a picture of the pipe cross section after washing
  • FIG. 12 includes a picture of the inside of the pipe after washing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Cleaning In General (AREA)

Abstract

La présente invention concerne un procédé de nettoyage de tuyau d'eau de robinet destiné à éliminer une matière étrangère dans un tuyau d'eau de robinet, le procédé comprenant : une première étape d'évacuation pour injecter de l'azote gazeux dans le tuyau d'eau de robinet de façon à évacuer l'eau contenue dans le tuyau d'eau de robinet vers l'extérieur ; et une seconde étape d'évacuation pour injecter un gaz d'azote, qui a une pression relativement supérieure à celle du gaz d'azote dans la première étape d'évacuation, dans le tuyau d'eau de robinet pour un temps de référence de façon à nettoyer l'intérieur du tuyau d'eau de robinet. La présente invention présente des avantages en ce que : de l'azote à haute pression est utilisé pour nettoyer l'intérieur du tuyau d'eau de robinet, et ainsi l'efficacité de nettoyage peut être améliorée par rapport au nettoyage par l'eau de nettoyage normale ; et l'azote ayant une pression relativement supérieure à celle de l'eau de nettoyage normale peut être injecté dans un tuyau d'eau de robinet, et ainsi le tuyau d'eau de robinet peut être nettoyé plus efficacement.
PCT/KR2018/007758 2018-07-03 2018-07-09 Procédé de nettoyage de tuyau d'eau de robinet WO2020009260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020180076992A KR102074521B1 (ko) 2018-07-03 2018-07-03 수도배관 세척방법
KR10-2018-0076992 2018-07-03

Publications (1)

Publication Number Publication Date
WO2020009260A1 true WO2020009260A1 (fr) 2020-01-09

Family

ID=69059217

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/007758 WO2020009260A1 (fr) 2018-07-03 2018-07-09 Procédé de nettoyage de tuyau d'eau de robinet

Country Status (2)

Country Link
KR (1) KR102074521B1 (fr)
WO (1) WO2020009260A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102531294B1 (ko) * 2022-12-08 2023-05-11 (주)하이크린 관로의 세척방법

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08281233A (ja) * 1995-04-18 1996-10-29 Hitachi Plant Eng & Constr Co Ltd 管洗浄方法
JPH10292447A (ja) * 1997-04-15 1998-11-04 Tenpusu Kk 給水配管の洗浄方法、及びそれに用いるオゾン含有気泡発生装置並びにオゾン含有気泡注入用アダプター
JP2002273366A (ja) * 2001-03-19 2002-09-24 Nippon Soda Co Ltd 管洗浄方法
KR20140146524A (ko) * 2014-01-14 2014-12-26 전연자 배관세척시스템
KR20150138802A (ko) * 2014-06-02 2015-12-10 전연자 고압질소가스를 이용한 수도배관 세척방법
KR20190014773A (ko) * 2017-08-03 2019-02-13 전연자 수도배관 세척방법

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09242139A (ja) * 1996-03-08 1997-09-16 Toda Constr Co Ltd 漏水試験方法と水圧試験機
JP2000246202A (ja) 1999-02-25 2000-09-12 Nozomi Ishigami 配管洗浄装置及び配管洗浄方法
US7448405B2 (en) 2004-06-14 2008-11-11 Shores Jerome P Multiple valve drain and pipe-cleaning device
JP5066748B2 (ja) 2006-08-29 2012-11-07 城勝 浦 配管の洗浄方法および装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08281233A (ja) * 1995-04-18 1996-10-29 Hitachi Plant Eng & Constr Co Ltd 管洗浄方法
JPH10292447A (ja) * 1997-04-15 1998-11-04 Tenpusu Kk 給水配管の洗浄方法、及びそれに用いるオゾン含有気泡発生装置並びにオゾン含有気泡注入用アダプター
JP2002273366A (ja) * 2001-03-19 2002-09-24 Nippon Soda Co Ltd 管洗浄方法
KR20140146524A (ko) * 2014-01-14 2014-12-26 전연자 배관세척시스템
KR20150138802A (ko) * 2014-06-02 2015-12-10 전연자 고압질소가스를 이용한 수도배관 세척방법
KR20190014773A (ko) * 2017-08-03 2019-02-13 전연자 수도배관 세척방법

Also Published As

Publication number Publication date
KR102074521B1 (ko) 2020-02-07
KR20200004044A (ko) 2020-01-13

Similar Documents

Publication Publication Date Title
WO2010058880A1 (fr) Appareil et procédé de test pour soupape de sécurité
JP6431581B1 (ja) 水道配管洗浄方法
KR101740514B1 (ko) 합성수지 파형관용 하자구간 검출장치 및 이를 이용한 하자구간 검출공법
CN107436261A (zh) 一种pccp管道水压试验方法
WO2020009260A1 (fr) Procédé de nettoyage de tuyau d'eau de robinet
CN104122049B (zh) 一种高压气密性试验方法
WO2020111766A1 (fr) Chambre de type tuyau pour test de pression interne
CN106595991A (zh) 一种预制管廊接头水压试验装置及使用方法
CN104923527B (zh) 一种应用于复杂氧气管网的脱脂装置及脱脂方法
WO2011004982A2 (fr) Système et procédé de sécurité pour équipement de fourniture de béton
KR101949050B1 (ko) 가스 차단용 수봉 시스템 및 방법
CA2303756A1 (fr) Appareil testeur de robinetterie
JP2017129463A (ja) 原子炉格納容器漏えい率検査用の圧縮空気ブロー構造
CN112197165B (zh) 一种lng装车撬用轻便式鹤管系统及其使用方法
CN113123530B (zh) 一种套筒组合灌浆的跟踪监测与智能控制方法
CN107893910A (zh) 一种用于煤气管道的排水器
KR100216708B1 (ko) 원전 격납용기의 배관설비의 국부누설율 측정장치 및 그 측정방법
EP0727651A1 (fr) Système et méthode d'essai sur place de l'étanchéité d'un membre tubulaire
KR101039255B1 (ko) 보수 및 관리가 용이한 대구경의 관로시스템
CN102809468A (zh) 高炉冷却设备单体试压工装、组合及试压方法
CN113770135A (zh) 一种穿越江河段管道内排液与清洗系统及方法
KR101030650B1 (ko) 인텔리전트 피그용 전원공급 및 관리장치
CN211740585U (zh) 一种核电站的便携式管道水压试验辅助装置
CN110762394A (zh) 燃油管路解堵装置及方法
CN214584564U (zh) 一种编织管测压装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18925422

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

32PN Ep: public notification in the ep bulletin as address of the adressee cannot be established

Free format text: NOTING OF LOSS OF RIGHTS PURSUANT TO RULE 112(1) EPC (EPO FORM 1205A DATED 20/05/2021)

122 Ep: pct application non-entry in european phase

Ref document number: 18925422

Country of ref document: EP

Kind code of ref document: A1