CN109323131A - A kind of gas ductwork metro stray current Interference Detection system and its method for arranging - Google Patents
A kind of gas ductwork metro stray current Interference Detection system and its method for arranging Download PDFInfo
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- CN109323131A CN109323131A CN201811465288.4A CN201811465288A CN109323131A CN 109323131 A CN109323131 A CN 109323131A CN 201811465288 A CN201811465288 A CN 201811465288A CN 109323131 A CN109323131 A CN 109323131A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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Abstract
The present invention relates to a kind of gas ductwork metro stray current Interference Detection system and its method for arranging, detection system includes the multiple detection units being correspondingly arranged with the test pile in gas ductwork, detection unit includes multiple interference coupons and multiple reference tubes, multiple interference coupon dispersions are embedded in the two sides of gas pipeline, the signal wire of each interference coupon is connect with termination respectively, termination is connect with gas pipeline, termination is equipped with a plurality of first lead and a plurality of second lead, and first lead and the second lead are equipped with connecting terminal；Detection unit further includes multiple potentiometer recorders and reference electrode, each potentiometer recorder is connect with first lead and the second lead respectively, each reference electrode correspondence is placed in the soil of reference tube lower end, has the advantages that of simple structure and low cost, using flexible, detection efficiency are high, detection accuracy is high, practical；The method for arranging of detection system has the advantages that simple process, implements to be easy.
Description
Technical field
The present invention relates to a kind of buried pipeline stray electrical current Interference Detection systems, and in particular to a kind of gas ductwork subway is miscellaneous
Dissipate current interference detection system and the method for arranging of the detection system.
Background technique
With the quickening of Process of Urbanization Construction, buried gas network is increasingly sophisticated, with underground railway track parallel and intersect laying
Situation is also more and more.Subway can release stray electrical current into surrounding soil in the process of running, and stray electrical current can be to buried combustion
Gas pipe network interferes and increases corrosion risk.The prior art generallys use the cathodic protection of immediate electrical outage detection gas pipeline
Current potential, and stray electrical current disturbed condition and corrosion risk are judged with this, but there is certain in practical applications for this method
Defect just cannot achieve cathodic protection potential detection when cannot simultaneously switch off multiple groups anode, and there are knot is detected when stray electrical current
There are bigger differences with practical cathodic protection potential for fruit.Meanwhile subway circulation has the characteristics that speed is fast, periodically strong, produces
Raw stray electrical current is complex and changeable, further increases the detection difficulty and error of immediate electrical outage, it is easy to miscellaneous
It dissipates current interference and corrosion risk causes to judge by accident.
Summary of the invention
The object of the present invention is to provide a kind of gas ductwork metro stray current Interference Detection system and its method for arranging, inspections
Examining system has the advantages that of simple structure and low cost, using flexible, detection efficiency are high, detection accuracy is high, practical；Cloth
The method of setting has the advantages that simple process, implements to be easy.
To solve the above-mentioned problems in the prior art, a kind of gas ductwork metro stray current provided by the invention is dry
Detection system is disturbed, including the multiple detection units being correspondingly arranged with the test pile in gas ductwork, the detection unit includes more
A interference coupon and multiple reference tubes, multiple interference coupons are embedded in the two sides of gas pipeline along axial dispersion and keep its naked
Show up back to gas pipeline, each signal wire for interfering coupon is connect with the termination being arranged in test pile respectively, wiring
Device is connect by cathode test line with gas pipeline, what termination was correspondingly connected with equipped with the signal wire with each interference coupon
A plurality of first lead and a plurality of second lead connecting with cathode test line, first lead and the second lead are equipped with terminals
Son；Detection unit further includes multiple potentiometer recorders and multiple reference electrodes for being correspondingly connected with potentiometer recorder, each current potential
Recorder passes through the first detection line correspondence respectively and connect with the connecting terminal of first lead, and each potentiometer recorder passes through second respectively
Detection line is connect with the connecting terminal of the second lead, and each reference electrode passes through auxiliary rod respectively and from top to bottom corresponds to across reference tube
It is placed in soil.
Further, a kind of gas ductwork metro stray current Interference Detection system of the present invention, wherein the interference checks
The center of piece and the axis of gas pipeline are in same level, interfere the spacing between coupon and gas pipeline be 10~
30cm；Vertical spacing between the reference electrode and interference coupon is 5~10cm, between reference electrode and interference coupon
Horizontal space be less than 5cm.
Further, a kind of gas ductwork metro stray current Interference Detection system of the present invention, wherein the multiple interference
It is 6.5cm that coupon, which is divided into bare area,2、20cm2And 50cm2Three groups, each group includes three or more the interference with size
Coupon；Bare area is 50cm2Interference coupon the side of gas pipeline, bare area 6.5cm are set2And 20cm2
Interference coupon the other side of gas pipeline is set.
Further, a kind of gas ductwork metro stray current Interference Detection system of the present invention, wherein the gas pipeline
For using the pipeline of 3PE erosion resistant coating or bilayer FBE erosion resistant coating, it is 1cm that the multiple interference coupon, which is divided into bare area,2、
6.5cm2And 20cm2Three groups, each group includes three or more the interference coupons with size；Bare area is 20cm2It is dry
Disturb the side that gas pipeline is arranged in coupon, bare area 1cm2And 6.5cm2Interference coupon be arranged in gas pipeline
The other side.
Further, a kind of gas ductwork metro stray current Interference Detection system of the present invention, wherein the gas pipeline
The distance between ipsilateral interference coupon is 30~35cm.
Further, a kind of gas ductwork metro stray current Interference Detection system of the present invention, wherein the reference tube and
Test pile is pvc pipe, and the upper end of reference tube and test pile is equipped with pipe cap.
A kind of method for arranging of above-mentioned gas ductwork metro stray current Interference Detection system provided by the invention, including with
Lower step:
One, the position for selecting a certain detection unit excavates ground until exposing gas pipeline to form operating pit；
Two, after by the exposed surface of each interference coupon using the polishing of 600 mesh fine sandpapers, it is arranged along axial dispersion in fuel gas conduit
The two sides in road, and be compacted fix by each interference coupon using soil；
Three, each reference tube is vertically set on the upside of corresponding interference coupon, and will be under each reference tube using soil
End surrounds compacting；
Four, the signal wire of each interference coupon is smoothed out with the fingers and penetrates test pile along after and is connect with termination；By termination
Cathode test line is connect with gas pipeline；
Five, test pile is vertically arranged, and backfills operating pit after the lower end of test pile is surrounded compacting using soil；
Six, each first lead connecting terminal of termination is connect with the second lead terminal respectively；
Seven, when detecting, each first lead connecting terminal of termination and the second lead terminal are disconnected；Each first is drawn
Line connecting terminal correspondence is connect with the first detection line of each potentiometer recorder, by each second lead terminal respectively with each electrogram
Second detection line of instrument connects；And it each reference electrode is passed through into auxiliary rod respectively from top to bottom corresponds to and across reference tube be placed in soil
In earth；Pass through the switch-off potential of the corresponding interference coupon of each potentiometer recorder detection with the period of setting；
Eight, after detecting, the first detection line of each potentiometer recorder and the second detection line are removed, and make termination
Each first lead connecting terminal and the second lead terminal restore connection status, while by each reference electrode from corresponding reference tube
Middle taking-up；
Nine, the arrangement of all detection units is completed according to the process of step 1 to eight.
A kind of gas ductwork metro stray current Interference Detection system of the present invention and its method for arranging compared with prior art,
Have the advantage that the present invention by the way that multiple detection units corresponding with the test pile in gas ductwork, detection unit packet is arranged
Include multiple interference coupons and multiple reference tubes, allow it is multiple interference coupons along axial dispersion be embedded in gas pipeline two sides and
Make its exposed surface back to gas pipeline, and make the signal wire of each interference coupon respectively with the termination that is arranged in test pile
Connection allows termination to connect by cathode test line with gas pipeline, is arranged on termination and each interference coupon
The a plurality of first lead and a plurality of second lead being connect with cathode test line that signal wire is correspondingly connected with, and make first lead and
Second lead is respectively provided with connecting terminal；Detection unit further includes multiple potentiometer recorders and is correspondingly connected with potentiometer recorder
Multiple reference electrodes allow each potentiometer recorder to pass through the first detection line correspondence respectively and connect with the connecting terminal of first lead, allow
Each potentiometer recorder passes through the second detection line respectively and connect with the connecting terminal of the second lead, and each reference electrode is allowed to pass through respectively
From top to bottom correspondence is placed in soil auxiliary rod across reference tube.Thus just constitute it is a kind of it is of simple structure and low cost, make
With the gas ductwork metro stray current Interference Detection system that flexible, detection efficiency is high, detection accuracy is high, practical.It is practical
In, according to the detection cycle of setting, the power off time interval conversion on-off electricity condition for allowing each potentiometer recorder to set,
And it is checked with the switch-off potential of the corresponding interference coupon of delay time acquisition set by analyzing each interference in each power-off
The switch-off potential of piece can accurate judgement metro stray current annoyance level and corrosion risk.The present invention is by being arranged multiple interference
Coupon simultaneously makes it be embedded in the two sides of gas pipeline along axial dispersion, not only increases the comprehensive of detection, and detectable
Different stray electrical current interference sources can be by metro stray current and other by combining the feature that subway speed is fast, periodically strong
Stray electrical current source region separates, thus accurate judgement metro stray current annoyance level and bring corrosion risk, to take
Targeted counter-measure.And the present invention passes through setting reference tube, termination and first lead and the second lead, detection
When, only each potentiometer recorder need to be allowed to connect with first lead and the second lead, and each reference electrode is allowed to pass through ginseng by auxiliary rod
It is placed in soil than pipe；After the completion of detection, each potentiometer recorder and reference electrode can be removed, and make each first lead and the
Two leads are connected by its connecting terminal, so as to each interference coupon that polarizes.On the one hand this structure improves detection and connection
Convenient, flexible property, on the other hand can make potentiometer recorder and reference electrode between multiple detection units rotation use, improve
Utilization rate, reduces equipment cost.A kind of cloth of gas ductwork metro stray current Interference Detection system provided by the invention
The method of setting has the advantages that simple process, implements to be easy.
Shown specific embodiment is to a kind of gas ductwork metro stray current Interference Detection of the present invention with reference to the accompanying drawing
System and its method for arranging are described in further detail:
Detailed description of the invention
Fig. 1 is a kind of lateral signal of gas ductwork metro stray current Interference Detection system non-detection status of the present invention
Figure；
Fig. 2 is a kind of longitudinal schematic diagram of gas ductwork metro stray current Interference Detection system detection state of the present invention.
Specific embodiment
Firstly the need of explanation, the nouns of locality such as heretofore described upper and lower, front, rear, left and right only with reference to the accompanying drawings into
Capable description, in order to understand, not to technical solution of the present invention and be claimed range progress limitation.
A kind of specific embodiment party of gas ductwork metro stray current Interference Detection system of the present invention as depicted in figs. 1 and 2
Formula, including the multiple detection units being correspondingly arranged with the test pile 6 in gas ductwork.Detection unit includes multiple interference coupons
1 and multiple reference tubes 2.Multiple interference coupons 1 are embedded in the two sides of gas pipeline 7 along axial dispersion and carry on the back its exposed surface
To gas pipeline 7, the signal wire 11 of each interference coupon 1 is allowed to connect respectively with the termination 3 being arranged in test pile 6.It allows
Termination 3 is connect by cathode test line 31 with gas pipeline 7, and the letter with each interference coupon 1 is arranged on termination 3
Number a plurality of first lead being correspondingly connected with of line 11 and a plurality of second lead being connect with cathode test line 31, and make first lead
Connecting terminal is respectively provided with the second lead.Detection unit further includes multiple potentiometer recorders 4 and company corresponding with potentiometer recorder 4
The multiple reference electrodes 5 connect.Each potentiometer recorder 4 is allowed to connect respectively by the corresponding connecting terminal with first lead of the first detection line
It connects, each potentiometer recorder 4 is allowed to connect respectively by the second detection line with the connecting terminal of the second lead.Each reference electrode 5 is divided
Not Tong Guo auxiliary rod 51 from top to bottom correspondence be placed in soil across reference tube 2.
It is arranged through the above structure and just constitutes one kind of simple structure and low cost, using flexible, detection efficiency height, inspection
Survey precision height, practical gas ductwork metro stray current Interference Detection system.In practical applications, according to the inspection of setting
The period is surveyed, allows each potentiometer recorder 4 to convert on-off electricity condition with the power off time interval of setting, and in each power-off to set
The switch-off potential (cathodic protection potential) of the fixed corresponding interference coupon 1 of delay time acquisition, by analyzing each interference coupon 1
Switch-off potential can accurate judgement metro stray current annoyance level and corrosion risk.The present invention is by being arranged multiple interference inspections
It looks into piece 1 and it is made to be embedded in the two sides of gas pipeline 7 along axial dispersion, not only increase the comprehensive and efficiency of detection, and
It can detect different stray electrical current interference sources, it, can be by metro stray current by combining the feature that subway speed is fast, periodically strong
It is separated with other stray electrical current source regions, thus accurate judgement metro stray current annoyance level and bring corrosion risk, with
Just targeted counter-measure is taken.And the present invention passes through setting reference tube 2, termination 3 and first lead and second
Lead when detection, only need to allow each potentiometer recorder 4 to connect with first lead and the second lead, and it is auxiliary to allow each reference electrode 5 to pass through
It helps bar 51 to pass through reference tube 2 to be placed in soil；After the completion of detection, each potentiometer recorder 4 and reference electrode 5 can be removed, and
Connect each first lead by its connecting terminal with the second lead, so as to each interference coupon 1 that polarizes.This structure is on the one hand
The convenient, flexible property for improving detection and connection, on the other hand can make potentiometer recorder 4 and reference electrode 5 in multiple detection units
Between rotation use, improve utilization rate, reduce equipment cost.It should be noted that potentiometer recorder 4 detects switch-off potential
Generally use energization 12s, power-off 3s, the mode for postponing 200~300ms.
As specific embodiment, by the present invention in that the center of interference coupon 1 and the axis of gas pipeline 7 are in same
On one horizontal plane, makes to interfere the spacing between coupon 1 and gas pipeline 7 between 10~30cm, make reference electrode 5 and interference
Vertical spacing between coupon 1 makes reference electrode 5 and interferes the horizontal space between coupon 1 small between 5~10cm
In 5cm, the validity and reliability of detection data is effectively increased.Meanwhile for different gas pipeline anti-corrosion types, this hair
Its grouping simultaneously is arranged in the bright interference coupon using different bare areas.For using the gas pipeline of conventional erosion resistant coating,
Its antiseptic property is poor, and it is respectively 6.5cm that the present invention, which is provided with three groups of bare areas,2、20cm2And 50cm2Interference coupon 1,
And make each group of interference coupon 1 for being respectively provided with three with size, and make bare area 50cm2Interference coupon 1 be arranged
In the side of gas pipeline, make bare area 6.5cm2And 20cm2Interference coupon 1 other side of gas pipeline is set.
It is demonstrated experimentally that the interference coupon combination of this structure setting is more bonded the reality of gas pipeline for such gas pipeline
Border situation can effectively improve the reliability and authenticity of detection.And for the combustion using 3PE erosion resistant coating or bilayer FBE erosion resistant coating
Feed channel, antiseptic property is preferable, this is bright, and to be provided with three groups of bare areas be respectively 1cm2、6.5cm2And 20cm2Interference inspection
Piece 1, and make each group of interference coupon 1 for being respectively provided with three with size, and make bare area 20cm2Interference coupon 1
The side of gas pipeline is set, bare area 1cm is made2And 6.5cm2Interference coupon 1 the another of gas pipeline is set
Side.It is demonstrated experimentally that the interference coupon combination of this structure setting is more bonded gas pipeline for such gas pipeline
Actual conditions equally improve the reliability and authenticity of detection.It should be noted that every group of interference coupon 1 is not limited to
Setting three, can also be set as needed three or more.In addition, to guarantee that detection efficiency and reliability, the present invention usually allow
The distance between ipsilateral interference coupon 1 of gas pipeline makes reference tube 2 and test pile be all made of PVC between 30~35cm
Pipe, and pipe cap is set in the upper end of reference tube 2 and test pile, the reliability and authenticity of detection are influenced with water-inlet-proof.
Based on the same inventive concept, the present invention also provides a kind of gas ductwork metro stray current Interference Detection systems
Method for arranging, specifically includes the following steps:
One, the position for selecting a certain detection unit excavates ground until exposing gas pipeline to form operating pit.
Two, after by the exposed surface of each interference coupon 1 using the polishing of 600 mesh fine sandpapers, it is arranged along axial dispersion in combustion gas
The two sides of pipeline, and be compacted fix by each interference coupon 1 using soil.
Three, each reference tube 2 is vertically set on corresponding 1 upside of interference coupon, and utilizes soil by each reference tube 2
Lower end surrounds compacting.
Four, the signal wire 11 of each interference coupon 1 is smoothed out with the fingers and penetrates test pile along after and is connect with termination 3；By wiring
3 cathode test line 31 of device is connect with gas pipeline.
Five, test pile is vertically arranged, and backfills operating pit after the lower end of test pile is surrounded compacting using soil.
Six, each first lead connecting terminal of termination 3 is connect with the second lead terminal respectively, to examining each interference
Look into the polarization of piece 1.
Seven, when detecting, each first lead connecting terminal of termination 3 and the second lead terminal are disconnected；By each first
Lead connecting terminal correspondence is connect with the first detection line of each potentiometer recorder 4, by each second lead terminal respectively with each current potential
Second detection line of recorder 4 connects；And each reference electrode 5 is from top to bottom corresponded to across reference tube by auxiliary rod 51 respectively
2 are placed in soil.Pass through the switch-off potential of the corresponding interference coupon 1 of each potentiometer recorder 4 detection with the period of setting.Pass through
The switch-off potential for analyzing each interference coupon can accurate judgement metro stray current annoyance level and corrosion risk.According to subway
The periodic characteristics of operation, the present invention will be usually set as 24 hours in the period, to guarantee the comprehensive of detection.
Eight, after detecting, the first detection line of each potentiometer recorder 4 and the second detection line are removed, and fill wiring
It sets 3 each first lead connecting terminal and the second lead terminal restores connection status, while by each reference electrode 5 from corresponding ginseng
Than being taken out in pipe 2.
Nine, the arrangement of all detection units is completed according to the process of step 1 to eight.
A kind of method for arranging of gas ductwork metro stray current Interference Detection system provided by the invention has technique letter
Advantage single, implementation is easy can be to metro stray current to fuel gas conduit by the detection to each interference 1 switch-off potential of coupon
The risk of interferences in road is assessed, and to use targeted counter-measure, improves safety.
Above embodiments are only the descriptions carried out to the preferred embodiment of the present invention, and model not is claimed to the present invention
It encloses and is defined, without departing from the spirit of the design of the present invention, the technology of this field engineers and technicians according to the present invention
The various forms of deformations that scheme is made, should fall within the scope of protection determined by the claims of the present invention.
Claims (7)
1. a kind of gas ductwork metro stray current Interference Detection system, which is characterized in that including with the test in gas ductwork
Multiple detection units for being correspondingly arranged of stake, the detection unit include multiple interference coupons (1) and multiple reference tubes (2), more
A interference coupon (1) is embedded in the two sides of gas pipeline along axial dispersion and makes its exposed surface back to gas pipeline, each to interfere
The signal wire (11) of coupon (1) is connect with the termination (3) being arranged in test pile respectively, and termination (3) passes through yin
Pole p-wire (31) is connect with gas pipeline, and termination (3) is equipped with connect corresponding with each interference signal wire (11) of coupon (1)
The a plurality of first lead connect and a plurality of second lead connecting with cathode test line (31), first lead and the second lead are all provided with
There is connecting terminal；Detection unit further includes multiple potentiometer recorders (4) and multiple ginsengs for being correspondingly connected with potentiometer recorder (4)
Than electrode (5), each potentiometer recorder (4) is connect by the first detection line correspondence with the connecting terminal of first lead respectively, each electricity
Position recorder (4) is connect by the second detection line with the connecting terminal of the second lead respectively, and each reference electrode (5) is respectively by auxiliary
Helping bar (51), from top to bottom correspondence is placed in soil across reference tube (2).
2. a kind of gas ductwork metro stray current Interference Detection system according to claim 1, which is characterized in that described
The center and the axis of gas pipeline for interfering coupon (1) be in same level, interfere coupon (1) and gas pipeline it
Between spacing be 10~30cm；Vertical spacing between the reference electrode (5) and interference coupon (1) is 5~10cm, reference
Horizontal space between electrode (5) and interference coupon (1) is less than 5cm.
3. a kind of gas ductwork metro stray current Interference Detection system according to claim 2, which is characterized in that described
It is 6.5cm that multiple interference coupons (1), which are divided into bare area,2、20cm2And 50cm2Three groups, each group includes three or more
With the interference coupon (1) of size；Bare area is 50cm2Interference coupon (1) side of gas pipeline is set, it is exposed
Area is 6.5cm2And 20cm2Interference coupon (1) other side of gas pipeline is set.
4. a kind of gas ductwork metro stray current Interference Detection system according to claim 2, which is characterized in that described
Gas pipeline is the pipeline using 3PE erosion resistant coating or bilayer FBE erosion resistant coating, and the multiple interference coupon (1) is divided into exposed surface
Product is 1cm2、6.5cm2And 20cm2Three groups, each group includes three or more the interference coupons (1) with size；Exposed surface
Product is 20cm2Interference coupon (1) side of gas pipeline, bare area 1cm are set2And 6.5cm2Interference inspection
The other side of gas pipeline is arranged in piece (1).
5. a kind of gas ductwork metro stray current Interference Detection system according to claim 3 or 4, which is characterized in that
The distance between described ipsilateral interference coupon (1) of gas pipeline is 30~35cm.
6. a kind of gas ductwork metro stray current Interference Detection system according to claim 5, which is characterized in that described
Reference tube (2) and test pile are pvc pipe, and the upper end of reference tube (2) and test pile is equipped with pipe cap.
7. the method for arranging of gas ductwork metro stray current Interference Detection system described in a kind of claim 6, which is characterized in that
The following steps are included:
One, the position for selecting a certain detection unit excavates ground until exposing gas pipeline to form operating pit；
Two, after by the exposed surface of each interference coupon (1) using the polishing of 600 mesh fine sandpapers, it is arranged along axial dispersion in fuel gas conduit
The two sides in road, and be compacted fix by each interference coupon (1) using soil；
Three, each reference tube (2) is vertically set on the upside of corresponding interference coupon (1), and utilizes soil by each reference tube (2)
Lower end surround compacting；
Four, the signal wire (11) of each interference coupon (1) is smoothed out with the fingers and penetrates test pile along after and is connect with termination (3)；It will connect
Line apparatus (3) cathode test line (31) is connect with gas pipeline；
Five, test pile is vertically arranged, and backfills operating pit after the lower end of test pile is surrounded compacting using soil；
Six, each first lead connecting terminal of termination (3) is connect with the second lead terminal respectively；
Seven, when detecting, each first lead connecting terminal of termination (3) and the second lead terminal are disconnected；Each first is drawn
Line connecting terminal correspondence is connect with the first detection line of each potentiometer recorder (4), by each second lead terminal respectively with each current potential
Second detection line of recorder (4) connects；And by each reference electrode (5) respectively by auxiliary rod (51) from top to bottom correspond to across
Reference tube (2) is placed in soil；Pass through corresponding interference coupon (1) of each potentiometer recorder (4) detection with the period of setting
Switch-off potential；
Eight, after detecting, the first detection line of each potentiometer recorder (4) and the second detection line are removed, and make termination
(3) each first lead connecting terminal and the second lead terminal restore connection status, while by each reference electrode (5) from corresponding
It is taken out in reference tube (2)；
Nine, the arrangement of all detection units is completed according to the process of step 1 to eight.
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| CN201811465288.4A CN109323131B (en) | 2018-12-03 | 2018-12-03 | Gas pipe network subway stray current interference detection system and arrangement method thereof |
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|---|---|---|---|
| CN201811465288.4A CN109323131B (en) | 2018-12-03 | 2018-12-03 | Gas pipe network subway stray current interference detection system and arrangement method thereof |
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| CN110836922A (en) * | 2019-11-18 | 2020-02-25 | 上海地铁维护保障有限公司供电分公司 | Device for detecting working state of reference electrode and working method thereof |
| CN111575717A (en) * | 2020-05-09 | 2020-08-25 | 中核武汉核电运行技术股份有限公司 | Inserting device for buried pipe anticorrosive coating damage simulation test piece |
| CN113944892A (en) * | 2021-11-09 | 2022-01-18 | 北京江河惠远科技有限公司 | Automatic monitoring method and device for critical state of riverbed area muddy water for long oil transportation pipeline |
| CN115823503A (en) * | 2022-11-29 | 2023-03-21 | 北京市燃气集团有限责任公司 | Community gas pipeline corrosion hotspot field test and identification method |
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