CN105301103B - The middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams - Google Patents
The middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams Download PDFInfo
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Abstract
The invention discloses a kind of middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams, it is related to ultrasonic flaw detecting device or method and technology field.Methods described comprises the following steps：In the upper side and lower side manufacture of intraocular defect of weld seam；A ultrasonic detecting probe is respectively clamped on the outer wall of steel pipe at left and right sides of the weld seam, adjusts the position of vertical core or downside vertical core on the upside of probe distance, probe positions is finely tuned, defect reflection highest ripple is found by supersonic detector；Supersonic detector is demarcated according to reflection highest ripple；Batch detection is carried out to the weld seam of steel pipe using calibrated supersonic detector.Methods described can effectively reduce the possibility for defect generation missing inspection occur in weld seam central region, improve steel pipe seam detection integrality, reduce the probability of weld seam missing inspection, ensure that the qualification rate that steel pipe dispatches from the factory, so as to improve the quality of product.
Description
Technical field
The present invention relates to ultrasonic flaw detecting device or method and technology field, more particularly to a kind of super large wall thickness SAWH steel pipe weldings
The middle part defect ultrasonic detection method of seam.
Background technology
After three line engineerings of transferring natural gas from the west to the east start production, spiral seam steel pipe submerged arc is always 18.4mm's using thickest
Large Diameter Pipeline pipeline, because domestic economy develops, the gas consumption of natural gas is also increasing year by year, several feed-lines in the existing country
Can not slowly meet the needs of industrial or agricultural and family use, will certainly the bigger pressure of demand, the system of more a plurality of pipeline engineering
Use is made, on the premise of conveying capacity increases, the caliber and wall thickness of steel pipe can also increase therewith, and this means that bigger wall thickness
Spiral submerged welded pipe（SAWH）The high-volume for facing market competition is purchased, in the end of the year 2013, National Pipe project management department just starts
Formulate large wall thickness steel tube development work plan, and when year end carry out spiral welding submerged-arc welding steel pipe trial-production wall thickness be more than
20mm Large Diameter Pipeline SAWH steel pipes, present major steel pipe's production factory also all manufacture experimently the steel pipe of big wall thickness, following at this
2 years small batches trial-production also successively carry out in, government supervision detection all trial-productions and evaluation terminate it is qualified after, will
Large batch of buying can be faced, domestic major pipeline projects purchase the spiral seam submerged arc welding steel of big wall thickness by high-volume is started
Pipe, national project go into operation shortly, and demand is huge.
The use that goes into operation for a kind of large-scale key project of the country such as three line engineerings, Sino-Russian pipe engineering of transferring natural gas from the west to the east, enters to this
Trial-production wall thickness of having gone exceedes 20mm big wall thickness SAWH steel pipes, is used for this instead of using the vertical masonry joint submerged arc welding steel in two classes area
Pipe carries out the laying of important pipeline, thus reduces steel pipe purchase cost, present domestic major spiral seam steel pipe submerged arc system
Make factory to have set about proceeding by production, examined the transformation of various aspects, so that the production adapted to such specification steel pipe needs
Ask.
With the demand in oil pipeline conveying market at this stage, the SAWH steel pipes manufacture of big wall thickness is before eyes, due to
Thickness of steel pipe is continuously increased, and is not had for existing automatic ultrasonic inspection equipment and such large wall thickness steel tube is completely covered
Flaw detection ability, it is necessary to increase the transformation that new check system is examined for large wall thickness steel tube and meet final all covering welding
Region.
According to existing national standard（GB/T9711-2011）, API Std（APISpec5L）, in oil
From the point of view of the content of the coherent detections such as portion's professional standard requirement, all Steel tube standard samples for ultrasound examination use weld seam
Region makes the mode of perpendicular through hole, longitudinal groove, Transverse notch to determine the mode of checking, pop one's head in largely use for
Shear wave angle beam method carries out parallel scan by way of one side bilateral, and because wall thickness continues to increase, acoustic beam is slanted using ultrasonic wave
Method cause the check frequency for occurring rhombus in the middle part of welding region（See Fig. 1-3, the middle part of weld seam is inspection in wherein Fig. 1
Survey blind area）, there is the blind area of certain area to the ultrasound detection of welded still pipe, it can be seen that, it is a kind of for large wall thickness steel tube
Verification mode has arrived the stage of necessary progress development test.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of middle part defect ultrasound of super large wall thickness SAWH steel pipe seams
Wave detecting method, methods described can effectively reduce the possibility for defect generation missing inspection occur in weld seam central region, improve
Steel pipe seam detects integrality, reduces the probability of weld seam missing inspection, ensure that the qualification rate that steel pipe dispatches from the factory, so as to improve product
Quality.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of super large wall thickness SAWH steel pipe seams
Middle part defect ultrasonic detection method, it is characterised in that comprise the following steps：
1）A Φ 1.6mm hole is made a call to the upper side and lower side of weld seam is each, and manufacture of intraocular defect, hole depth is the one of thickness of steel pipe
Half, the position of upside vertical core and downside vertical core is staggered；
2）On the outer wall of steel pipe at left and right sides of the weld seam respectively clamping one ultrasonic detecting probe, adjust probe away from
From the position of upside vertical core or downside vertical core, probe positions are finely tuned, defect reflection highest ripple is found by supersonic detector；Its
In, side probe verification upside vertical core, opposite side probe verifies downside vertical core, and the probe of verification upside vertical core is using once partly anti-
Penetrate sound path to be verified, the distance of vertical core should meet on the upside of the probe distance：（The wall thickness of the K values of probe × tested steel pipe）×
1.5 times of reflection sound path ± 10mm；The probe of verification downside vertical core is verified using half reflection sound path twice, the probe distance
The distance of downside vertical core should meet：（The wall thickness of the K values of probe × tested steel pipe）× 2.5 times of reflection sound path ± 10mm；
3）The medium position of supersonic detector gate is at the reflection highest ripple, adjusts supersonic detector
Multiplier (-icator), back wave is reached into the 100% of position of strobe, gain 3dB-5dB, as dynamic Scanning sensitivity, dynamic scan observation
Whether artificial defect can trigger alarm threshold, be finished if Normal Alarm is demarcation, failing to triggering high alarm setting, then weigh
New adjustment probe positions, until untill alarming, wherein defect reflection equivalent is Φ 1.6mm holes wave height 100%, baseline reflectance wave height
For the 50% of supersonic detector display screen, i.e., gate alarm height is the 50% of supersonic detector display screen；
4）Batch detection is carried out to the weld seam of steel pipe using calibrated supersonic detector, when discovery supersonic detector
When showing that echo height exceedes the triggering alarm of display screen 50%, regard as unqualified, check processing is carried out to weld seam at alarm, and
Mark unqualified position.
Further technical scheme is：The probe selects shear wave probe, and between 2.5MHz-5MHz, K values exist frequency
Between 2-2.5.
Further technical scheme is：The distance measurement method of vertical core or downside vertical core is as follows on the upside of probe distance：It is first
First, the Front distance of probe is determined, then by step 2）In calculation formula calculate on the upside of probe distance vertical core or under
The theoretical distance of side vertical core, theoretical distance subtract Front distance draw upside vertical core or downside vertical core reach probe edge away from
From, finally measure above-mentioned edge distance using ruler, to probe position.
Further technical scheme is：The Front distance for incidence angle of popping one's head in is surveyed using standard CSK-IA test blocks
It is fixed.
Further technical scheme is：The wall thickness of the SAWH steel pipes is not less than 20mm.
It is using beneficial effect caused by above-mentioned technical proposal：Big wall thickness SAWH steel pipes are carried out by methods described
During automatic ultrasonic testing, the possibility for defect generation missing inspection occur in weld seam central region can be effectively reduced, is improved
Steel pipe seam detection integrality, reduces the probability of weld seam missing inspection, ensure that the qualification rate that steel pipe dispatches from the factory, so as to improve production
The quality of product and the safety coefficient of operation.
Brief description of the drawings
Fig. 1-3 is the flaw detection principle schematic of prior art；
Fig. 4 is the flow chart of the present invention；
Fig. 5-7 is the flaw detection principle schematic of the present invention；
Wherein：1st, weld seam 2, steel pipe 3, upside vertical core 4, downside vertical core 5, probe 6, check frequency.
Embodiment
With reference to the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Ground describes, it is clear that described embodiment is only the part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
It is different from other manner described here using other to implement, those skilled in the art can be without prejudice to intension of the present invention
In the case of do similar popularization, therefore the present invention is not limited by following public specific embodiment.
It is overall, the invention discloses a kind of middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams,
Methods described comprises the following steps：
1）A Φ 1.6mm hole is made a call to the upper side and lower side of weld seam 1 is each, and manufacture of intraocular defect, hole depth is the wall thickness of steel pipe 2
The position of half, upside vertical core 3 and downside vertical core 4 is staggered, as seen in figs. 5-6；
2）A ultrasonic detecting probe 5 is respectively clamped on the outer wall of steel pipe 2 of the left and right sides of weld seam 1, adjusts spy
Head finely tunes probe positions, defect reflection is found most by supersonic detector apart from the position of upside vertical core 3 or downside vertical core 4
Gao Bo；Wherein, side probe verification upside vertical core 3, opposite side probe verification downside vertical core 4, the probe of verification upside vertical core 3 are adopted
Verified with a half reflection sound path（As shown in Figure 5）, the distance of vertical core 3 should meet on the upside of the probe distance：（The K of probe
The wall thickness of value × tested steel pipe）× 1.5 times of reflection sound path ± 10mm；The probe of verification downside vertical core 4 uses half reflection twice
Sound path is verified（As shown in Figure 6）, the distance of vertical core 4 should meet on the downside of the probe distance：（The K values of probe × tested steel pipe
Wall thickness）× 2.5 times of reflection sound path ± 10mm；
Vertical core or downside vertical core is as follows apart from actual measurement method on the upside of probe distance：First, before determining probe
Along distance, then by step 2）In calculation formula calculate the theoretical distance of vertical core or downside vertical core on the upside of probe distance,
Theoretical distance subtracts the edge distance that Front distance draws upside vertical core or downside vertical core reaches probe, is finally measured using ruler
Above-mentioned edge distance, probe is positioned.
3）The medium position of supersonic detector gate is at the reflection highest ripple, adjusts supersonic detector
Multiplier (-icator), back wave is reached into the 100% of position of strobe, gain 3dB-5dB, as dynamic Scanning sensitivity, dynamic scan observation
Whether artificial defect can trigger alarm threshold, be finished if Normal Alarm is demarcation, failing to triggering high alarm setting, then weigh
New adjustment probe positions, until untill alarming, wherein defect reflection equivalent is Φ 1.6mm holes wave height 100%, baseline reflectance wave height
For the 50% of supersonic detector display screen, i.e., gate alarm height is the 50% of supersonic detector display screen；
4）Batch detection is carried out to the weld seam of steel pipe using calibrated supersonic detector, when discovery supersonic detector
When showing that echo height exceedes the triggering alarm of display screen 50%, regard as unqualified, check processing is carried out to weld seam at alarm, and
Mark unqualified position.
Specifically, herein described method is described as follows, Fig. 4 refer to：
The nominal wall thickness use range of SAWH steel pipes is determined, the method for the invention is not less than 20mm steel for wall thickness
Pipe.Related data is consulted, it is determined that the type the medium position of this weld seam is likely to occur the defects of, is provided by consulting relevant speciality
The defects of expecting, occurring in the middle part of SAWH steel-pipe weldings region is largely the Dangerous defects such as lack of penetration, slag inclusion, grain-boundary crack.
For drawbacks described above, herein described method selection shear wave probe, frequency is between 2.5MHz-5MHz, and K values are between 2-2.5.
The coupled modes of probe select thin water layer coupled method（Also referred to as contact method）, according to ultrasonic characteristic, when coupling layer is wavelength
The integral multiple of half or it is very thin when, entrant sound effect is good, is reflected back wave height, and coupling performance is best.
The making of clamping device for detecting flaw, according to existing mechanical structure, newly-increased probe clamping device is extended, again
New probe action mechanism is made, using single probe independent operation, while the principle acted, the increase to blind area are no more than
150mm, it is alap to shorten the blind area detected a flaw manually.
The making of artificial defect, looked into according to related external data consultation and this specific aim, the defects of welding middle part
Looking for must select on the basis of the holes of Φ 1.6 in middle part manufacturing artificial defect, the application, and hole depth is the half of wall thickness.
Under determining that verification mode, specific verification mode step enter according to drawbacks described above：On the basis of the holes of Φ 1.6, defect is anti-
It is the hole wave height 100% of Φ 1.6 to penetrate equivalent, and baseline reflectance wave height is the 50% of display screen（Gate alarm height）, verification position is
The wall thickness mid portion in the holes of Φ 1.6.
According to Fig. 7：Probe layout verifies the holes of top Φ 1.6, opposite side verification bottom Φ 1.6 holes, top for side
The holes of Φ 1.6 use a half reflection sound path（Reflect sound path）Verified, the holes of bottom Φ 1.6 are carried out using half reflection sound path twice
Verification.The Front distance for incidence angle of popping one's head in is measured using reference block CSK-IA test blocks.It is upper to avoid back wave from passing through
Following corner reflection, so can only be verified by calculation, the hole particular locations of probe distance Φ 1.6 see below calculating：
The upper pitch-rows of Φ 1.6 from=（The wall thickness of the K values of probe × tested steel pipe）× 1.5 times of reflection sound path ± 10mm；
The lower pitch-rows of Φ 1.6 from=（The wall thickness of the K values of probe × tested steel pipe）× 2.5 times of reflection sound path ± 10mm；
With K=2, it is tested exemplified by wall thickness=21.4mm of steel pipe, above-mentioned distance is respectively：2*21.4*1.5±10mm=64±
10mm, 2*21.4*2.5 ± 10mm=107 ± 10mm.
Probe distance defective locations are adjusted, fine setting finds defect reflection highest ripple, gate medium position is in into highest
At back wave, multiplier (-icator) is adjusted, back wave is reached into the 100% of position of strobe, gain 3-5dB, as dynamic Scanning sensitivity.
Whether dynamic scanning observation artificial defect can trigger alarm threshold.Normal Alarm is that regulation finishes, and fails triggering then according to upper
One step re-starts regulation, untill alarm.
By covering of such a mode to middle part rhombus blind area, reached whole welding region can 100% progress side entirely
Position scanning, in the figure 7 it can be seen that being both rhombus blind area in black region, and newly-increased scanning overlay area, meshing
It is the overlay region with the covering of other passages, it can be seen that methods described is fully able to detect the defects of covering in the middle part of weld seam.
So far batch detection can be carried out to steel pipe, by upper when discovery instrument shows that echo height triggers more than display screen 50%
Regard as unqualified during alarm, unqualified position can be marked to carrying out check processing at alarm.
As a result of above-mentioned checking scheme, different from national standard and the demarcation mode of Overseas Correlative Standards,
Belong to a kind of new verification method of inspection, in the national standards of existing all kinds of petroleum conveying pipelines, international standard, professional standard
To this region verify the artificial defect of verification, after by pilot development success and practical application, to big wall thickness
During the automatic ultrasonic testing of SAWH steel pipes, the possibility for defect generation missing inspection occur in central region can be effectively reduced
Property, Tube heating furnace integrality is substantially increased, the high-volume steel pipe's production to occur later, which is examined, prepares, and reduces weld seam leakage
The probability of inspection, it ensure that qualification rate that steel pipe dispatches from the factory and the safety coefficient of operation.
Claims (4)
1. a kind of middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams, it is characterised in that including following step
Suddenly：
1) a Φ 1.6mm hole is made a call to the upper side and lower side of weld seam (1) is each, manufacture of intraocular defect, hole depth is steel pipe (2) wall thickness
Stagger the position of half, upside vertical core (3) and downside vertical core (4)；
2) ultrasonic detecting probe (5) is respectively clamped on steel pipe (2) outer wall at left and right sides of the weld seam (1), is adjusted
The position of vertical core (3) or downside vertical core (4) on the upside of probe distance, probe positions are finely tuned, defect is found by supersonic detector
Reflect highest ripple；Wherein, side probe verification upside vertical core (3), opposite side probe verification downside vertical core (4), verification upside are perpendicular
The probe in hole (3) is verified using a half reflection sound path, and the distance of vertical core (3) should meet on the upside of the probe distance：(probe
K values × tested steel pipe wall thickness) × 1.5 times of reflection sound path ± 10mm；The probe of verification downside vertical core (4) is using twice half
Reflection sound path is verified, and the distance of vertical core (4) should meet on the downside of the probe distance：(the wall of the K values of probe × tested steel pipe
It is thick) × 2.5 times of reflection sound path ± 10mm；
3) medium position of supersonic detector gate is at the reflection highest ripple, adjusts the gain of supersonic detector
Device, back wave is reached into the 100% of position of strobe, gain 3dB-5dB, as dynamic Scanning sensitivity, dynamic scan observer
Whether work defect can trigger alarm threshold, be finished if Normal Alarm is demarcation, failing to triggering high alarm setting, then again
Probe positions are adjusted, untill alarm, wherein defect reflection equivalent is Φ 1.6mm holes wave height 100%, and baseline reflectance wave height is
The 50% of supersonic detector display screen, i.e. gate alarm height are the 50% of supersonic detector display screen；
4) batch detection is carried out to the weld seam of steel pipe using calibrated supersonic detector, when discovery supersonic detector is shown
When echo height exceedes the triggering alarm of display screen 50%, regard as unqualified, check processing is carried out to weld seam at alarm, and mark
Go out unqualified position；
The wall thickness of the SAWH steel pipes is not less than 20mm.
2. the middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams as claimed in claim 1, its feature exist
In：The probe (5) selects shear wave probe, and frequency is between 2.5MHz-5MHz, and K values are between 2-2.5.
3. the middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams as claimed in claim 1, its feature exist
In the distance measurement method of vertical core or downside vertical core is as follows on the upside of probe distance：First, the Front distance of probe is determined, so
The theoretical distance of vertical core or downside vertical core on the upside of probe distance is calculated by the calculation formula in step 2) afterwards, theoretical distance subtracts
Go Front distance draw upside vertical core or downside vertical core reach probe edge distance, finally using ruler measure above-mentioned edge away from
From, to probe position.
4. the middle part defect ultrasonic detection method of super large wall thickness SAWH steel pipe seams as claimed in claim 3, its feature exist
In：The Front distance of probe is measured using standard CSK-IA test blocks.
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| CN106153734B (en) * | 2016-09-06 | 2020-05-19 | 合肥超科电子有限公司 | Secondary wave wheel type probe bracket and probe |
| CN114280144B (en) * | 2021-11-17 | 2023-12-08 | 东方电气集团东方锅炉股份有限公司 | Rotatable angle ultrasonic probe and weld defect ultrasonic detection method |
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| CN103235045A (en) * | 2013-04-22 | 2013-08-07 | 北京隆盛泰科石油管科技有限公司 | Calibration block used for automatically ultrasonically detecting submerged arc weld of steel pipe |
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| GB0903232D0 (en) * | 2009-02-25 | 2009-04-08 | Saipem Spa | A method for testing pipeline welds |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103235045A (en) * | 2013-04-22 | 2013-08-07 | 北京隆盛泰科石油管科技有限公司 | Calibration block used for automatically ultrasonically detecting submerged arc weld of steel pipe |
Non-Patent Citations (3)
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| 埋弧焊管超声波探伤标准反射体的选择;王晨等;《焊管》;20111130;第34卷(第11期);全文 * |
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Effective date of registration: 20200924 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee after: China oil steel tube Co.,Ltd. Yangzhou branch Address before: 300457, Tianjin, Tanggu Development Zone, No. 19 West Ring Road, Tianjin Binhai service outsourcing industry park, building 3 Patentee before: CNPC Bohai Petroleum Equipment Manufacturing Co.,Ltd. Patentee before: NORTH CHINA PETROLEUM STEEL PIPE Co.,Ltd. |