CN107219120A - The rapid evaluation instrument and rapid method for assessment of a kind of butt fusion welding weld bond quality - Google Patents
The rapid evaluation instrument and rapid method for assessment of a kind of butt fusion welding weld bond quality Download PDFInfo
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- CN107219120A CN107219120A CN201710303075.0A CN201710303075A CN107219120A CN 107219120 A CN107219120 A CN 107219120A CN 201710303075 A CN201710303075 A CN 201710303075A CN 107219120 A CN107219120 A CN 107219120A
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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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
- G01N2203/0003—Steady
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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
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
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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
- G01N2203/003—Generation of the force
- G01N2203/0032—Generation of the force using mechanical means
- G01N2203/0041—Human or animal power
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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
- G01N2203/006—Crack, flaws, fracture or rupture
- G01N2203/0067—Fracture or rupture
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0296—Welds
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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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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Abstract
The present invention relates to a kind of rapid evaluation instrument of butt fusion welding weld bond quality and rapid method for assessment, it is characterized in that, it is made up of rubber handle, the arm of force, strip steady pin, strip processing assembly, set up two groups of strip processing assemblies are symmetrical, both connecting places are flexibly connected by connecting roll shaft, strip to be measured is fixed in the top of the strip processing assembly by strip steady pin, the outside of left and right sides strip processing assembly connects an arm of force respectively, the arm of force holds position and is provided with rubber handle, forms the lever construction using roll shaft as fixing point.The present invention is simple to operate, when carrying out weld bond stretching tear test, it is thus only necessary to which two people can complete operation；It is quick direct, when carrying out weld bond stretching tear test, it is only necessary to which a few minutes can complete whole process；Wide using scope, the instrument goes for the heat-melting butt-joint weld bond detection of conventional most of bore polyethylene pipes, is not limited by outer diameter tube and wall thickness.
Description
[technical field]
The present invention relates to butt welding technical field, specifically a kind of rapid evaluation of butt fusion welding weld bond quality
Instrument and rapid method for assessment.
[background technology]
Polyethylene pipe is the main pipeline that gas conveyance conduit in current Municipal Industry, water supply and sewerage pipeline are used
Type, it has occupied more than 90% market in European gas industry, has also obtained significantly increasing in recent years in China.But
It is, the means of polyethylene pipe welding at present still without effective Site Detection, simply by virtue of outward appearance detection and laboratory inspection
Survey and carry out mass discrimination, it is necessary to carry out procedure qualification when being changed especially for welding material, equipment, technique, personnel
When, carry out laboratory test test and just seem that the time is slow, cumbersome, have considerable influence to engineering construction progress.This instrument can be with
Welding piece is quickly detected for scene, shortens detection time, the quick effect for carrying out procedure qualification is reached.
The connected mode of polyethylene pipe is main to be welded as master with heat-melting butt-joint, but is due to itself spy of material property
Point, polyethylene pipe carries out nondestructive inspection detection like that without image of Buddha metallic conduit, relies primarily on outward appearance and is detected.Also, according to
According to《Combustion gas polyethylene pipe welding technique rule》TSG D2002-2006 " Article 8 duct element manufacturer and pipeline
Installation unit carries out heat-melting butt-joint welding, and qualification of welding procedure should be carried out by having during situations below：(1) this code is used first
The welding condition (seeing appendix A) of recommendation or other welding conditions；(2) different raw material rank (such as PE80 with
PE100 duct element) is mutually welded；(3) duct element of same raw material rank, melt mass flow rate (MFR) difference is big
In 0.5g/10min (190 DEG C, 5kg)；(4) duct element is to being welded with particular/special requirement；(5) construction environment and welding machine work bar
Part has larger gap.Pipeline welding is examined can be divided into non-destructive and destructive test and experiment with experiment.Nondestructive test
It is that macroscopical (outward appearance) is checked with experiment Main Means, the quality control for duct element manufacturing process or Pipe installing scene
With the self-inspection of operating personnel；Destructive test is mainly used in qualification of welding procedure and the disputable weld bond of welding quality with experiment
Experiment.The destructive testing of polyethylene pipe according in GB 19810 regulation carry out, it is necessary to large-scale special stretching experiment equipment and
Corresponding qualification reviewer, laboratory, experiment can not be carried out at the scene, and complex process, cycle are long.It is quick for needing
The situation of qualification of welding procedure can not be tried out before being constructed, and cause time, waste economically, be that rapid construction situation is made
Into inconvenience.The detection that a kind of quick heat-melting butt-joint welding examines equipment to carry out scene to pipe welding port is generally wished in industry
Instrument, can be judged the feasibility of welding equipment, personnel, welding procedure with meeting supervisor, owner's unit.
[content of the invention]
It is an object of the invention to the defect for overcoming prior art presence, there is provided a kind of the fast of butt fusion welding weld bond quality
Fast evaluation instrument, and a kind of assessment method of the quicklook of butt fusion welding weld bond quality.
To achieve the above object, a kind of rapid evaluation instrument of butt fusion welding weld bond quality is designed, it is characterised in that by
Rubber handle, the arm of force, strip steady pin, strip processing assembly composition, set up two groups of strip processing assemblies are symmetrical, both
Connecting place is flexibly connected by connecting roll shaft, and strip to be measured is fixed in the top of the strip processing assembly by strip steady pin,
The outside of left and right sides strip processing assembly connects an arm of force respectively, and the arm of force holds position and is provided with rubber handle, is formed
Using roll shaft as the lever construction of fixing point.
The strip processing assembly is made up of pedestal, strip placed cavity, connection roll shaft, and the upper surface of the pedestal is provided with examination
Bar placed cavity, strip to be measured is positioned in the strip placed cavity, and is inserted perpendicularly into by strip steady pin in strip placed cavity
Fixed, the connecting place of left and right sides pedestal is flexibly connected by same connection roll shaft.
Junction, the surface of connection roll shaft of left and right sides strip processing assembly correspond to polyethylene thermofussion welding to be measured just
Position while welding.
After the completion of the instrument, polyethylene heat-melting butt-joint weld bond can quickly be evaluated, judge weld bond whether one
Determine to ftracture under drawing force, after by cracking in the form of tentatively judge the quality of weld bond.
A kind of rapid method for assessment of butt fusion welding weld bond quality, it is characterised in that the pipe after heat-melting butt-joint is welded
Road weld bond is prepared into the strip of requirement, carries out Rapid stretching using weld bond stretching detection pincers, strip is destroyed, passes through strip
Failure mode after destruction is judged.
The instrument is in welding quality deterministic process, the characteristics of having following：
1st, it is simple to operate, when carrying out weld bond stretching tear test, it is thus only necessary to which two people can complete operation.
2nd, tool design uses lever principle, and operating personnel are light, laborsaving when operating.
3rd, it is quick direct, when carrying out weld bond stretching tear test, it is only necessary to which a few minutes can complete whole process.
4th, instrument is easy to carry, and instrument gross weight is no more than 5 kilograms, is easy to carry, and not affected by environment, is easy to apply
Work and administrative staff carry out the operation of job site.
5th, wide using scope, the instrument goes for the heat-melting butt-joint weld bond of conventional most of bore polyethylene pipes
Detection, is not limited by outer diameter tube and wall thickness.
[brief description of the drawings]
Fig. 1 a are the instrument front view
Fig. 1 b are the instrument top view
Fig. 2 is strip processing structure part partial enlarged drawing
Fig. 3 is to use operating effect figure
Fig. 4 is electron microscope
Fig. 5 is rapid method for assessment axonometric drawing
Fig. 6 is rapid method for assessment schematic cross-section
Description of symbols in figure
1 rubber handle, 2 arm of forces, 3 strip steady pins, 4 strip processing assemblies, 5 pedestals, 6 strip placed cavities, 7 connection roll
Axle.
[embodiment]
According to GB/T 19810《The survey of polyethylene (PE) tubing and pipe fitting butt-fusion welded joint tensile strength and failure mode
It is fixed》Standard requirement, is processed into dumbbell specimen by polyethylene (PE) tubing butt-fusion welded joint, sample is applied with constant speed
One pulling force.When sample bears load on cupping machine, stress concentration is final near joints destruction in welding position.Hot melt
Banjo fixing butt jointing quality judged with failure mode and tensile strength, failure mode as shown in figure 4,
Wherein, solder joint position or generation ductile rupture pattern near it, judge that welding is qualified, such as generation brittle fracture
Pattern, then welding failure.
By reasons such as institute's test material grades, the tensile yield strength of weld bond can not provide standard value, welding quality master
Will be based on weld bond failure mode.Uniform draw speed is defined in standard, the purpose is to avoid because weld bond occurs quickly
Cracking destruction situation, in the case where avoiding rapid crack propagation situation from occurring, you can detected by stretching.
By the instrument of the design, by artificial strength, power is amplified by lever principle, can be in stretch position shape
Into more than 1000bar pulling force, 250 millimeters of diameter, standard size ratio are adapted to for SDR11, material rate PE100 and 250
The quick detection of the heat-melting butt-joint weld bond quality of the following caliber pipe of millimeter.
The concrete structure of this instrument is as shown in Fig. 1 a, 1b, by rubber handle, the arm of force, strip steady pin, strip processing assembly
Composition, is set up two groups of strip processing assemblies are symmetrical, and both connecting places are flexibly connected by connecting roll shaft, at the strip
Strip to be measured is fixed in the top for managing component by strip steady pin, and the outside of left and right sides strip processing assembly connects one respectively
The arm of force, the arm of force holds position and is provided with rubber handle, forms the lever construction using roll shaft as fixing point.
As shown in Fig. 2 the strip processing assembly by pedestal, strip placed cavity, connection roll shaft constitute, the pedestal it is upper
Surface is provided with strip placed cavity, and strip to be measured is positioned in the strip placed cavity, and is inserted perpendicularly into examination by strip steady pin
Fixed in bar placed cavity, the connecting place of left and right sides pedestal is flexibly connected by same connection roll shaft.
Method presents a kind of to thermoplastic (material of polyethylene and other close welding manners) heat-melting butt-joint
Weld bond carries out the method for testing of rapid evaluation.This method can provide contaminated solder side, welding temperature deficiency, welding pressure not
Foot, the too high dry joint caused of welding temperature, the live rapid evaluation of rosin joint situation.This method can be combined with other method of testings
Use, come judge heat-melting butt-joint welding weld bond with the presence or absence of the defect such as rosin joint, dry joint.Polyethylene pipe is carried out using the instrument
Welding quality test step：
1st, principle
Thermoplastic pipe's butt fusion welding weld bond is connect into engineering bar-shaped sample (as shown in Figure 1), stretching detection pincers pair are used
Sample is stretched.Sample stretching detection pincers on bear load when, stress concentration in strip weakness zone and ultimately cause
Strip is destroyed.
Butt fusion welding weld bond is judged with the presence or absence of defects such as rosin joint dry joints by failure mode.
This experiment is at -10 DEG C --- carried out at a temperature of 40 DEG C.
2nd, equipment
3.1 test environment
Test temperature is controlled at -10 DEG C --- and 40 DEG C.
3.2 stretching detection pincers
It is made up of rubber handle, the arm of force, strip steady pin, strip processing assembly, by two groups of strip processing assemblies or so pair
Title is set up, and both connecting places are flexibly connected by connecting roll shaft, and the top of the strip processing assembly is solid by strip steady pin
Fixed strip to be measured, the outside of left and right sides strip processing assembly connects an arm of force respectively, and the arm of force holds position and is provided with rubber
Glue handle, forms the lever construction using roll shaft as fixing point.
Stretching detection pincers must have sample fixing device, it is ensured that place sample in detection and slide；
Stretching detection pincers allow for providing enough pulling force, until strip is destroyed.
3rd, sample
4.1 sampling
Preparing tubing/pipe fitting used in sample should be extracted according to the regulation of product standard.
4.2 prepare
Heat-melting butt-joint welding weld bond should be prepared according to correlation hot melt butt welding standard.
To each required sample, a strip should be processed through axial direction of the joint along tubing, and be processed further preparing
Meet the sample of following size.
Crimping can be removed.
The machined surface of sample should be smooth, it is impossible to have obvious damage.
Butt fusion welding oral examination sample sample position such as Fig. 5, sample form such as Fig. 6 and sample form size such as table 1：
The sample form size of table 1 (unit millimeter)
| Symbol | Explanation | Size requirement |
| L | The total length of sample | ≥250 |
| A | Any one end of sample to position while welding vertical range | ≥125 |
| S | Wall thickness | Total wall thickness |
| W | Specimen width | 20≥W≥10 |
4.3 sample quantities
Sample quantities are determined by nominal size of pipe dn, are shown in Table 2.
The quantity of the style of table 2
One of sample should be derived from joint misalignment maximum, and other samples must be obtained along joint even circumferential.
4th, status adjustment
Sample preparation should be carried out after the completion of heat-melting butt-joint welding, sample is tested after should being adjusted 1 hour.
5th, estimation steps
6.1 measurement tube wall thicknesses carry out sample preparation as sample thickness according to table 1.
The sample of respective numbers is prepared according to table 2.
Sample both sides should not have obvious breakage, such as exist damaged, it is necessary to record damage location.
6.2 are fixed on sample in the strip placed cavity of stretching detection pincers, and are fixed.
6.3 testing staff hold the handle of stretching detection pincers, and firmly close up stretching detection pincers, and pulling force is applied to sample,
Until weld bond is destroyed near position while welding.
During experiment, it should ensure that strip position while welding on the top of bending position.
The destruction position of 6.4 record samples and Failure type (such as brittle break or ductile failure), ductile failure or fragility
Failure type.It is the destruction in the neighbouring 15mm distances of center line in weld seam only to consider destruction position.
6th, the judgement of experimental result
After the completion of pressure testing, welding effect is judged according to experiment failure mode, wherein ductile failure is passes through, and brittle break is
Do not pass through, need to be measured further combined with other experiment methods.
The obvious damage location of destruction everywhere described in 6.1, it is considered as carrying out evaluation experiment from new sampling.
7th, experimental result is recorded
Experimental result record should include herein below：
A) title of this method of testing；
B) necessary information of style, including the nominal dimension of sample tubing, raw material model, welder's name, welder's numbering,
Welding equipment manufacturer code, tubing manufacturer code, welding procedure used；
C) sample quantities；
D) each sample Failure type；
E) phenomenon observed in experimentation；
F) it is any to have influence on the factor of result of the test；
G) experimenter's name；
H) date is tested；
The detection method is in welding quality deterministic process, the characteristics of having following：
1st, it is simple to operate, when carrying out weld bond stretching tear test, it is thus only necessary to which two people can complete operation.
2nd, tool design uses lever principle, and operating personnel are light, laborsaving when operating.
3rd, it is quick direct, when carrying out weld bond stretching tear test, it is only necessary to which a few minutes can complete whole process.
4th, instrument is easy to carry, and instrument gross weight is no more than 5 kilograms, is easy to carry, and not affected by environment, is easy to apply
Work and administrative staff carry out the operation of job site.
5th, wide using scope, the instrument goes for the heat-melting butt-joint weld bond of conventional most of bore polyethylene pipes
Detection, is not limited by outer diameter tube and wall thickness.
Claims (6)
1. a kind of rapid evaluation instrument of butt fusion welding weld bond quality, it is characterised in that solid by rubber handle, the arm of force, strip
Rationed marketing, strip processing assembly composition, are set up two groups of strip processing assemblies are symmetrical, and both connecting places are lived by connecting roll shaft
Strip to be measured, left and right sides strip processing assembly are fixed in dynamic connection, the top of the strip processing assembly by strip steady pin
Outside connect an arm of force respectively, the arm of force holds position and is provided with rubber handle, forms the lever using roll shaft as fixing point
Structure.
2. a kind of rapid evaluation instrument of butt fusion welding weld bond quality as claimed in claim 1, it is characterised in that the examination
Bar processing assembly is made up of pedestal, strip placed cavity, connection roll shaft, and the upper surface of the pedestal is provided with strip placed cavity, to be measured
Strip is positioned in the strip placed cavity, and is inserted perpendicularly into fixation, the left and right sides in strip placed cavity by strip steady pin
The connecting place of pedestal is flexibly connected by same connection roll shaft.
3. a kind of rapid evaluation instrument of butt fusion welding weld bond quality as claimed in claim 1, it is characterised in that left and right two
Junction, the surface of connection roll shaft of side strip processing assembly correspond to the position while welding of polyethylene thermofussion welding to be measured just.
4. a kind of rapid method for assessment of the rapid evaluation instrument of butt fusion welding weld bond quality as claimed in claim 1, it is special
Levy and be, the pipe welding port after heat-melting butt-joint is welded is prepared into the strip of requirement, use the fast of butt fusion welding weld bond quality
Fast evaluation instrument carries out Rapid stretching, strip is destroyed, the failure mode after being destroyed by strip is judged, including with
Lower step：
1) test environment preparation, control test temperature control is at -10 DEG C --- 40 DEG C and preparation hot melt as claimed in claim 1
The rapid evaluation instrument of butt welding weld bond quality；
2) sample, preparing tubing/pipe fitting used in sample should be extracted according to the regulation of product standard, heat-melting butt-joint welding weldering
Mouth should be prepared according to correlation hot melt butt welding standard；To each required sample, it should add through joint along the axial direction of tubing
Work goes out a strip, and is processed further meeting with preparation the sample of following size, and crimping can be removed, and the machined surface of sample should
It is smooth, it is impossible to have obvious damage；Butt fusion welding oral examination sample sample position is central weld bond, and sample quantities are by tubing
Nominal diameter dn is determined；
3) status adjustment, should carry out sample preparation after the completion of heat-melting butt-joint welding, and sample is tried after should being adjusted 1 hour
Test；
4) estimation steps
In the strip placed cavity that sample is fixed on to stretching detection pincers, and it is fixed；
Testing staff holds the handle of stretching detection pincers, and firmly closes up stretching detection pincers, applies pulling force to sample, until weld bond
Destroyed near position while welding；
During experiment, it should ensure that strip position while welding on the top of bending position；
Record destruction position and Failure type (such as brittle break or ductile failure), ductile failure or the brittle break class of sample
Type, it is the destruction in the neighbouring 15mm distances of center line in weld seam only to consider destruction position；
5) judgement of experimental result
After the completion of pressure testing, welding effect is judged according to experiment failure mode, wherein ductile failure is passes through, and brittle break is not lead to
Cross, need to be measured further combined with other experiment methods；Destruction everywhere in obvious damage location, be considered as from it is new sample into
Row evaluation experiment.
5. the rapid method for assessment of the rapid evaluation instrument of butt fusion welding weld bond quality as claimed in claim 4, its feature exists
In measurement tube wall thickness carries out sample preparation as sample thickness according to following table, and sample both sides should not have obvious breakage, such as exists
It is damaged, it is necessary to record damage location,
6. the rapid method for assessment of the rapid evaluation instrument of butt fusion welding weld bond quality as claimed in claim 4, its feature exists
In, sample quantities are determined by nominal size of pipe dn, see the table below, and one of sample should be derived from joint misalignment maximum, its
He must obtain sample along joint even circumferential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710303075.0A CN107219120A (en) | 2017-05-03 | 2017-05-03 | The rapid evaluation instrument and rapid method for assessment of a kind of butt fusion welding weld bond quality |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710303075.0A CN107219120A (en) | 2017-05-03 | 2017-05-03 | The rapid evaluation instrument and rapid method for assessment of a kind of butt fusion welding weld bond quality |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107219120A true CN107219120A (en) | 2017-09-29 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710303075.0A Withdrawn CN107219120A (en) | 2017-05-03 | 2017-05-03 | The rapid evaluation instrument and rapid method for assessment of a kind of butt fusion welding weld bond quality |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111745320A (en) * | 2020-05-27 | 2020-10-09 | 中国石油天然气集团有限公司 | Evaluation method and system for improving reliability and applicability of pipeline welding circular seam process |
| CN113340703A (en) * | 2021-05-28 | 2021-09-03 | 天津中车唐车轨道车辆有限公司 | Welding process evaluation test method for covering T-shaped butt joint |
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| CN205580872U (en) * | 2016-04-14 | 2016-09-14 | 上海同济建设工程质量检测站 | A anchor clamps for geogrid weldbonding point peeling performance is experimental |
| KR20160135613A (en) * | 2015-05-18 | 2016-11-28 | 한국전력공사 | Sensor transfer apparatus for weld joint inspection |
| CN206725355U (en) * | 2017-05-03 | 2017-12-08 | 上海亚大塑料制品有限公司 | A kind of rapid evaluation instrument of butt fusion welding weld bond quality |
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2017
- 2017-05-03 CN CN201710303075.0A patent/CN107219120A/en not_active Withdrawn
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19642581A1 (en) * | 1996-10-15 | 1998-04-16 | Stuertz Maschbau | Plastic welding testing device |
| CN202956306U (en) * | 2012-11-07 | 2013-05-29 | 安徽江淮汽车股份有限公司 | Portable tearing test auxiliary device |
| CN203025040U (en) * | 2013-01-05 | 2013-06-26 | 陕西重型汽车有限公司 | Tool for testing welding spot strength of spot welding test piece |
| CN103357711A (en) * | 2013-07-01 | 2013-10-23 | 中国船舶重工集团公司第七二五研究所 | Processing method for bending plate-shaped metal sample into U-shaped metal sample |
| KR20160135613A (en) * | 2015-05-18 | 2016-11-28 | 한국전력공사 | Sensor transfer apparatus for weld joint inspection |
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| CN205580872U (en) * | 2016-04-14 | 2016-09-14 | 上海同济建设工程质量检测站 | A anchor clamps for geogrid weldbonding point peeling performance is experimental |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111745320A (en) * | 2020-05-27 | 2020-10-09 | 中国石油天然气集团有限公司 | Evaluation method and system for improving reliability and applicability of pipeline welding circular seam process |
| CN113340703A (en) * | 2021-05-28 | 2021-09-03 | 天津中车唐车轨道车辆有限公司 | Welding process evaluation test method for covering T-shaped butt joint |
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