CN106525618B - Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial fatigue load - Google Patents
Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial fatigue load Download PDFInfo
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- CN106525618B CN106525618B CN201610843086.3A CN201610843086A CN106525618B CN 106525618 B CN106525618 B CN 106525618B CN 201610843086 A CN201610843086 A CN 201610843086A CN 106525618 B CN106525618 B CN 106525618B
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- 230000007797 corrosion Effects 0.000 title claims abstract description 31
- 238000005260 corrosion Methods 0.000 title claims abstract description 31
- 239000012530 fluid Substances 0.000 claims abstract description 58
- 238000012360 testing method Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000011068 loading method Methods 0.000 claims abstract description 21
- 238000002474 experimental method Methods 0.000 claims abstract description 10
- 238000003825 pressing Methods 0.000 claims description 15
- 230000005540 biological transmission Effects 0.000 claims description 9
- 239000007787 solid Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
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- 238000004088 simulation Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
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- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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Abstract
The present invention relates to the Flow Corrosion experimental rigs under a kind of shrinkage scale submarine pipeline axial fatigue load, including water tank 1, adjustable speed water pump 2, fluid input tube section 3, clamped flange 5, loading test pipe fitting 6, check experiment pipe fitting 7, load flange 9, axial push-pull load bringing device 10, fluid output tube section 11, wherein, fluid input tube section 3 realizes the shunting to the fluid in the water tank 1 aspirated by adjustable speed water pump 2 by the first three-way connection, fluid output tube section 11 realizes the confluence to the fluid for being passed to loading test pipe fitting 6 and check experiment pipe fitting 7 by the second three-way connection, one end of loading test pipe fitting 6 is connected by clamped flange 5 with fluid input tube section 3, the other end is connected by load flange 9 with fluid output tube section 11；Axial push-pull load bringing device 10 is fixedly connected with load flange.The present invention can be with the operating environment of simulated sea bottom pipeline and standpipe during service.
Description
Technical field
The present invention relates to the Flow Corrosion experimental rigs under a kind of shrinkage scale submarine pipeline drawingand pressing fatigue load, utilize the dress
The synergy that shrinkage scale pipeline test specimen interior flow field and axial circulation Tensile or Compressive Loading may be implemented is set, approximate simulation is during one's term of military service
The stress condition of standpipe and submarine pipeline under pipe flow field and axial push-pull fatigue load, probe into axial push-pull fatigue load with
The internal corrosion mechanism and fatigue reliability of standpipe and submarine pipeline under different flow field conditions, the fatigue of prediction pipeline during one's term of military service
With the dangerous point of corrosion.
Background technique
Demand with countries in the world to the energy increasingly increase and land oil it is increasingly depleted, people invest focus
Ocean.So far from the laying of first submarine pipeline of eighties of last century the forties, the exploration and exploitation skill of Marine oil and gas resource
Art moves towards deep-sea from shallow sea, and has all built ocean platform and subsea production system in many sea areas.But ocean is in band
Also contain danger while welfare huge to the mankind, sea is being lost invariably in complicated sea conditions and corrosion flow media etc.
Foreign works.Every year because the marine structure of fatigue and corrosion failure is all not within minority, wherein being occupied especially with submarine pipeline and standpipe
It is more.Once submarine pipeline fails, the economy for being difficult to make up and environmental loss will be caused.Therefore, for submarine pipeline and standpipe
The research of corrosion mechanism and fatigue reliability is of great significance.
Submarine pipeline and standpipe are the lifelines of Marine oil and gas resource development system, because of its excessively elongated design feature,
So and the system weak link.Compared to land conveyance conduit, submarine pipeline has the oil gas of high speed mixed in addition to inside
Collaborate effect of the body by outer, also in pipeline external by complicated wave loadings, earthquake, axial force etc..Marine riser is to connect
Connect subsea wellheads and offshore structures and carry out the unique channel of oil and gas development and conveying, during operation always by external pressure,
The effect of axial circulation Tensile or Compressive Loading caused by the heave movement of ocean corrugated and riser upper floating body.Cyclic Axial Loads and interior
Portion's flow media is the important sources of deep underwater pipes corrosion and fatigue failure, is all that can not neglect in submarine pipeline and standpipe design
Factor slightly.
Scaling factor pipeline fatigue and corrosion test are the effective way for such issues that probe into, lot of research both domestic and external
All show scaling factor pipeline with practical pipeline under the conditions of meeting similar geometric dimension, dynamic similarity and similar flow model,
The test result of scaling factor can be applied in the design of practical structures.Experimental rig of the invention can be used for various forms of
Deep water scaling factor pipeline, such as varying-arca channel, the pipeline with valve, straight tube and bend pipe study different pipeline locations with this
Internal corrosion and tired situation.The device can simulate different pipeline interior flow field situations, and research flow velocity, temperature, conveying are situated between
The influence to test result such as matter.In pipe while trandfer fluid, device can apply axial circulation Tensile or Compressive Loading, to analyze
Pipeline corrosion and tired situation under pipe flow field and axial fatigue load coupling.The device also allows while carrying out two
The test of root canal road test specimen, is contrasted test.
Existing fatigue and corrosion testing apparatus are to be directed to single stress field or flow field mostly, cannot be to multi- scenarios method
The fatigue and corrosion behavior expansion research of submarine pipeline under effect.And the Flow Corrosion device under some pulsating stresses, although
Cyclic loading can be applied to test specimen in flow field, but just for metal testing plate.The corrosion condition meeting of metal testing plate different surfaces
It influences each other, surfaces externally and internally can not be suitable for and completely cut off the pipeline to come, flow field condition can not also simulate the conveying of submarine pipeline
Medium.
Summary of the invention
It is an object of the invention to overcome the above-mentioned deficiency of the prior art, a kind of pipeline inside stream that analog is different is provided
The emotionally scaling factor submarine pipeline axis of the submarine pipeline fatigue and corrosion condition under condition, tube shaped and axial circulation Tensile or Compressive Loading
To the Flow Corrosion experimental rig under drawingand pressing fatigue load.Technical scheme is as follows:
A kind of Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial fatigue load, including water tank 1, adjustable speed water pump
2, fluid input tube section 3, clamped flange 5, loading test pipe fitting 6, check experiment pipe fitting 7, load flange 9, axial push-pull load
Bringing device 10, fluid output tube section 11, wherein
Fluid input tube section 3 is realized by the first three-way connection to the fluid in the water tank 1 aspirated by adjustable speed water pump 2
It shunts, fluid output tube section 11 is realized by the second three-way connection to being passed to loading test pipe fitting 6 and check experiment pipe fitting 7
One end of the confluence of fluid, loading test pipe fitting 6 is connected by clamped flange 5 with fluid input tube section 3, and the other end passes through load
Flange 9 is connected with fluid output tube section 11；
Axial push-pull load bringing device 10 includes power transmission frame 25, drawing-pressing spring 27, crankshaft connecting rod system and servo electricity
Machine 23, crankshaft connecting rod system include cylindrical slider 28, connecting rod 24, flywheel 22, slider pin 26 and crankshaft 29, cylindrical slider 28
One end is solid, is fixedly connected with drawing-pressing spring 27；The other end is hollow, the inside setting lesser variable cross-section sliding block in a piece intermediate cross-section
Pin 26 connects with both ends with the connecting rod 24 of annulus；One end of crankshaft 29 is connected with connecting rod, and the other end drives with by servo motor 23
Dynamic flywheel 22 is connected；The outside of cylindrical slider 28 is equipped with fixed slide cartridge 21, can only move in a straight line to limit sliding block；U
25 one end of type power transmission frame is fixedly connected with load flange 9, and the other end is fixedly connected with drawing-pressing spring 27；Applied by this device
Axial fatigue Tensile or Compressive Loading, and the size of load and frequency are all adjustable.
As another embodiment, one end of check experiment pipe fitting 7 passes through clamped flange and 3 phase of fluid input tube section
Even, the other end is connected by load flange with fluid output tube section 11, and load flange and another set of axial push-pull load apply dress
It sets connected.
The mode that fluid output tube section 11 is combined preferably with the PVC hose 19 with hose coupling 20 and PVC straight tube 12；
Fluid input tube section 3 is preferably with PVC straight tube.
The present invention is directed to submarine pipeline, provides the Flow Corrosion examination under a kind of shrinkage scale submarine pipeline drawingand pressing fatigue load
Experiment device, advantages and beneficial effects are as follows:
(1) fatigue and interior corruption of the shrinkage scale pipeline under the synergy of pipe flow field and axial push-pull fatigue load are realized
Corrosion test, the operating environment of real simulation submarine pipeline and standpipe during service provide for the design and detection of submarine pipeline
Reference data.
(2) control to pipe flow field situation is realized, studies different pumped (conveying) mediums, flow velocity etc. to the shadow of pipeline corrosion
It rings.
(3) simulation to different tube shapeds, such as varying cross-section duct, the pipeline with valve, straight tube and bend pipe, prediction are realized
More targeted detection plan is specified in the dangerous point of submarine pipeline fatigue and corrosion.
(4) two groups of shrinkage scale duct tests can be carried out simultaneously, meet Experimental Comparison requirement.
(5) device is simple, is suitable for pipelines Flow Corrosion and fatigue test.
Detailed description of the invention
Fig. 1 complete layout
Figure label explanation: 1-water tank；2-adjustable speed water pumps；3-fluid input tube sections；4-flanges；5-clamped flanges；
6-loading test pipe fittings；7-check experiment pipe fittings；8-conduit saddles；9-load flanges；10-axial push-pull load bringing devices；
11-fluid output tube sections
Fig. 2 fluid input tube road section
Figure label explanation: 4-flanges；12-PVC straight tubes；13-channel bends；14-water valves；15-flowmeters；
16-three-way connections；17-nuts；18-bolts
Fig. 3 fluid delivery pipeline section
Figure label explanation: 12-PVC straight tubes；13-channel bends；14-water valves；15-flowmeters；16-three connect
Head；19-PVC hoses；20-hose couplings
Fig. 4 axial push-pull load bringing device
Figure label explanation: 21-fixed slide cartridges；22-flywheels；23-servo motors；24-connecting rods；25-power transmission frames
Frame；29-crankshafts
Fig. 5 removes the axial push-pull load bringing device of fixed slide cartridge
Figure label explanation: 22-flywheels；23-servo motors；24-connecting rods；25-power transmission frames；26-slider pins；
27-drawing-pressing springs；28-sliding blocks；29-crankshafts
Specific embodiment
As shown in Figure 1, the Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial push-pull fatigue load specifically includes that
Water tank 1, adjustable speed water pump 2, fluid input tube section 3, flange 4, clamped flange 5, loading test pipe fitting 6, check experiment pipe fitting 7, pipe
Support 8, load flange 9, axial push-pull load bringing device 10, fluid output tube section 11.Fluid input tube section 3 and fluid output tube
11 one end of section are connected to water tank 1, and the other end is connect using flange with test pipe fitting, constitute tube fluid channel.Examination in water tank 1
Fluid is tested to be exchanged according to test requirements document.Adjustable speed water pump 2 controls the fluid flow rate for entering fluid input tube section 3 by water pump, examination
It tests fluid and enters test pipe fitting 6,7 through fluid input tube section 3, and water tank is flowed by fluid output tube section 11, constitute circulation.Entirely
Pipe flow field flow velocity, pumped (conveying) medium are controllable.Moreover, the water valve 14 in the fluid output tube section 11 and fluid input tube road 3 is successively
When closing, it can make to test the pipeline fatigue and internal corrosion test, full of stationary fluid, studied under static flow field in pipe fitting.Clamped method
Orchid 5 is welded by flange and flange fixing seat, is kept fixed test pipe fitting at incoming flow end.Load flange 9 and axis with handle
It is welded to Tensile or Compressive Loading bringing device 10, guarantees that axial push-pull load can be applied to test pipe under pipe flow field.Device
Conduit saddle 8 is placed in pipeline section above ground level and 6,7 lower section of test pipe fitting, keeps whole device sufficiently stable, keep pipe flow field not by
It influences, avoids interference of the gravity factor to test result.
As shown in Fig. 2, fluid input tube section 3 includes two channel bends 13 and a threeway 16, set on PVC straight tube 12
Aperture is set, for installing water valve 14 and flowmeter 15.Further control flows into developmental tube to water valve 14 in fluid input tube section 3
The flow velocity of the test fluid of part 6,7, flow velocity size are obtained by the readings of flowmeter 15.Threeway 16 is arranged in fluid input tube section 3, real
Now to the shunting in input flow field, various comparative tests can be carried out, probe into the influence different in flow rate to pipeline corrosion, it is axial to draw
Coupling etc. of the compressive load down tube flow field to pipeline fatigue damage.
As shown in figure 3, fluid output tube section 11 includes two channel bends 13 and a threeway 16, on PVC straight tube 12
Water valve 14 and flowmeter 15 are installed in aperture, and 19 end of PVC hose has hose coupling 20.PVC hose 19 allows to be displaced, and avoids pair
The influence of axial push-pull load, hose length can be adjusted according to the length of test pipe fitting and other needs of test.
As shown in Figure 4 and Figure 5, axial push-pull load bringing device 10 is by servo motor 23, drawing-pressing spring 27, power transmission frame
25 and crankshaft connecting rod system composition.Crankshaft connecting rod system is by cylindrical slider 28, connecting rod 24, flywheel 22, slider pin 26 and crankshaft
29 compositions.28 one end of cylindrical slider is solid, welds with drawing-pressing spring 27；The other end is hollow, an inside piece intermediate cross-section of setting
Lesser cylinder variable cross-section slider pin 26, connects with the connecting rod 24 with pull ring.Crankshaft 29 is welded on flywheel 22, connecting rod 24 it is another
One end is connect by pull ring with crankshaft 29, and connection type is identical with slider pin 26, thus the left and right displacement of limiting rod.Tension and compression bullet
The other end and power transmission frame 25 of spring 27 weld.It is equipped with a fixation slide cartridge 21 for being fixed on ground outside sliding block 28, makes sliding block only
It can be moved in a straight line in slide cartridge.Servo motor 23 receives specific current signal and starts to work, and drives the rotation of flywheel 22, leads to
Crossing crankshaft 29 and connecting rod 24 makes sliding block 28 do straight reciprocating motion in fixed slide cartridge 21, and then drawing-pressing spring 27 is made to stretch or press
Contracting, and passed on load flange 9 and test pipe fitting by the power transmission frame 25 of rigidity, realize that test pipe fitting axial fatigue tension and compression carry
The application of lotus.Axial push-pull load bringing device 10 can need to be added on test pipe fitting 7 according to test, mounting means and examination
Test that pipe fitting 6 is identical, to realize the comparative test of different loads amplitude and frequency etc..The frequency of axial load is controlled by servo motor 23
System, the amplitude of load by drawing-pressing spring stiffness reliability.
When specifically being tested, the water valve in fluid input tube section 3 and fluid output tube section 11 is first opened, speed regulation is connected
Water pump 2 makes test fluid enter circulating line channel, after 15 stable reading of flowmeter, closes adjustable speed water pump 2 and all water valves
14.After the leakproofness for having checked device, decides whether to reclose adjustable speed water pump 2 according to specific testing program and open specific tube
Section water supply valve.Servo motor 23 is connected in the test for needing to apply axial fatigue load, via crankshaft connecting rod system and drawing-pressing spring
27 pairs of test pipe fittings 6 or 7 carry out the application of specific load form.Test pipe fitting and practical pipe fitting meet geometric similarity, axial to draw
Compressive load is calculated according to actual loading situation of the pipeline in ocean, and pipe flow field is identical as the liquid form of practical flow field
(laminar flow or turbulent flow).When off-test, adjustable speed water pump 2 and servo motor are closed, unloads developmental tube after tube fluid outflow
Part splits test pipe fitting, observes the tired situation of pipe fitting surfaces externally and internally and the corrosion condition of inner surface, measures fatigue crack length
With the test datas such as corrosion depth.
Claims (1)
1. the Flow Corrosion experimental rig under a kind of shrinkage scale submarine pipeline axial fatigue load, including water tank (1), adjustable speed water pump
(2), fluid input tube section (3), clamped flange (5), loading test pipe fitting (6), check experiment pipe fitting (7), the first load flange
(9), the second load flange, axial push-pull load bringing device (10), fluid output tube section (11), wherein
Fluid input tube section (3) realizes the fluid inner to the water tank (1) aspirated by adjustable speed water pump (2) by the first three-way connection
Shunting, fluid output tube section (11) by the second three-way connection realize to be passed to respectively loading test pipe fitting (6) and control
The confluence of the fluid of pipe fitting (7) is tested, one end of loading test pipe fitting (6) passes through clamped flange (5) and fluid input tube section (3)
It is connected, the other end is connected by the first load flange (9) with fluid output tube section (11)；One end of check experiment pipe fitting (7) is logical
Clamped flange to be crossed to be connected with fluid input tube section (3), the other end is connected by the second load flange with fluid output tube section (11),
Second load flange is connected with another set of axial push-pull load bringing device；
Axial push-pull load bringing device (10) includes U-shaped power transmission frame (25), drawing-pressing spring (27), crankshaft connecting rod system and watches
It takes motor (23), crankshaft connecting rod system includes cylindrical slider (28), connecting rod (24), flywheel (22), slider pin (26) and crankshaft
(29), cylindrical slider (28) one end is solid, is fixedly connected with drawing-pressing spring (27)；The other end is hollow, in inside setting one
Between the lesser variable cross-section slider pin (26) in section, connect with both ends with the connecting rod (24) of annulus；One end of crankshaft (29) and company
Bar is connected, and the other end is connected with the flywheel (22) driven by servo motor (23)；The outside of cylindrical slider (28), which is equipped with, to be fixed
Slide cartridge (21) can only be moved in a straight line to limit sliding block；U-shaped power transmission frame (25) one end and the first load flange (9) are fixed
Connection, the other end are fixedly connected with drawing-pressing spring (27)；Apply axial fatigue Tensile or Compressive Loading by this device, and load is big
Small and frequency is all adjustable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610843086.3A CN106525618B (en) | 2016-09-22 | 2016-09-22 | Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial fatigue load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610843086.3A CN106525618B (en) | 2016-09-22 | 2016-09-22 | Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial fatigue load |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106525618A CN106525618A (en) | 2017-03-22 |
| CN106525618B true CN106525618B (en) | 2019-04-16 |
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| CN201610843086.3A Expired - Fee Related CN106525618B (en) | 2016-09-22 | 2016-09-22 | Flow Corrosion experimental rig under shrinkage scale submarine pipeline axial fatigue load |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108051313A (en) * | 2017-11-15 | 2018-05-18 | 天津大学 | In-service deep seafloor buried pipeline earthquake-high pressure load combination loading experimental rig |
| CN108982345B (en) * | 2018-08-15 | 2021-03-09 | 中国石油天然气股份有限公司 | Equal-flow-quantity type multistage-flow-velocity mixed transportation pipeline erosion field test device |
| CN113848138A (en) * | 2021-09-22 | 2021-12-28 | 天津大学 | A cyclic loading device for deep sea pipeline |
| CN115096352B (en) * | 2022-05-18 | 2025-01-10 | 中国石油大学(华东) | Underwater mixed transportation pipeline damage simulation experiment device and simulation experiment method |
| CN115132050B (en) * | 2022-07-05 | 2023-03-21 | 浙江大学 | Observation experiment teaching device for simulating marine environment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718034A (en) * | 1970-09-17 | 1973-02-27 | D Swearingen | Hydraulic corrosion monitoring coupon injector |
| CN2352950Y (en) * | 1998-09-28 | 1999-12-08 | 宝山钢铁(集团)公司 | Investigating abrasion machine |
| GB2338307A (en) * | 1998-06-10 | 1999-12-15 | Copipe Systems Limited | Sensing corrosivity in a pipeline |
| EP2474771A2 (en) * | 2011-01-10 | 2012-07-11 | PII Limited | Apparatus for pipeline inspection |
| CN103616485A (en) * | 2013-12-10 | 2014-03-05 | 中国航空工业标准件制造有限责任公司 | Multifunctional numerical control stress corrosion testing device |
| CN103743635A (en) * | 2013-06-20 | 2014-04-23 | 华北电力大学 | Creep deformation test method and platform of full-dimension pipeline bend |
-
2016
- 2016-09-22 CN CN201610843086.3A patent/CN106525618B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3718034A (en) * | 1970-09-17 | 1973-02-27 | D Swearingen | Hydraulic corrosion monitoring coupon injector |
| GB2338307A (en) * | 1998-06-10 | 1999-12-15 | Copipe Systems Limited | Sensing corrosivity in a pipeline |
| CN2352950Y (en) * | 1998-09-28 | 1999-12-08 | 宝山钢铁(集团)公司 | Investigating abrasion machine |
| EP2474771A2 (en) * | 2011-01-10 | 2012-07-11 | PII Limited | Apparatus for pipeline inspection |
| CN103743635A (en) * | 2013-06-20 | 2014-04-23 | 华北电力大学 | Creep deformation test method and platform of full-dimension pipeline bend |
| CN103616485A (en) * | 2013-12-10 | 2014-03-05 | 中国航空工业标准件制造有限责任公司 | Multifunctional numerical control stress corrosion testing device |
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| CN106525618A (en) | 2017-03-22 |
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