CN109507287A - Pipeline non-destructive testing construction method - Google Patents
Pipeline non-destructive testing construction method Download PDFInfo
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- CN109507287A CN109507287A CN201811340536.2A CN201811340536A CN109507287A CN 109507287 A CN109507287 A CN 109507287A CN 201811340536 A CN201811340536 A CN 201811340536A CN 109507287 A CN109507287 A CN 109507287A
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- pipeline
- destructive testing
- welding
- weld seam
- testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/02—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material
- G01N23/04—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by transmitting the radiation through the material and forming images of the material
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
- G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink
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- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
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- General Physics & Mathematics (AREA)
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- Pathology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Acoustics & Sound (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention discloses a kind of pipeline non-destructive testing construction methods, comprising: the material for being detected pipeline, thickness, curvature, group are understood before detection to situation, groove type, welding method, weld reinforcement, weld width and groove；It is finished in welding, weld seam implements non-destructive testing to the pipeline after welding using digital type ultrasound wave detector after visual examination is qualified；Digital type ultrasound wave detector power supply, connection probe are opened, regulated attenuator will test sensitivity adjustment as evaluation line sensitivity, probe is placed in weld seam two sides and makees sawtooth pattern scanning；Liquid penetrant testing and Magnetic testing are made to the weld seam of pipeline, it is ensured that weld seam zero defect.The present invention can ensure that engineering non-destructive testing construction speed is consistent with welding progress.
Description
Technical field
The present invention relates to a kind of pipeline construction methods, specifically, are related to a kind of pipeline non-destructive testing construction method.
Background technique
When for the construction of long range metallic conduit, the welding of pipeline is a very important link, but in field, by
It is more severe in construction environment, so that welding quality can not be completely secured after pipeline welding, multimedia pipeline is needed to examine
Survey technology, to find welding defect.
But in the prior art, pipe detection means can not ensure that engineering construction progress is consistent with the progress of welding.
Summary of the invention
Technical problem solved by the invention is to provide a kind of pipeline non-destructive testing construction method, it can be ensured that engineering is lossless
Detection construction speed is consistent with welding progress.
Technical solution is as follows:
A kind of pipeline non-destructive testing construction method, comprising:
The material of tested pipeline, thickness, curvature, group are understood before detection to more than situation, groove type, welding method, weld seam
High, weld width and groove；It is finished in welding, weld seam is after visual examination is qualified using digital type ultrasound wave detector to welding
Pipeline afterwards implements non-destructive testing；
Digital type ultrasound wave detector power supply, connection probe are opened, regulated attenuator will test sensitivity adjustment as evaluation
Probe is placed in weld seam two sides and makees sawtooth pattern scanning by line sensitivity；
Liquid penetrant testing and Magnetic testing are made to the weld seam of pipeline, it is ensured that weld seam zero defect.
Further, the material for having delayed crack to be inclined to should be carried out non-destructive testing at least after 24 hours after the completion of welding；Number
Word formula ultrasonic detector operating frequency range is 1~10MHz, and horizontal linearity error is not more than 1%, and vertical linearity error is little
In 5%.
Further, carrying out prerinse to its surface with cleaning agent before Liquid penetrant testing, there must not be the objects such as greasy dirt；Do not allow to adopt
The method processing of shortcoming opening may be blocked with sandblasting, shot-peening etc.；Time of penetration depends on the material of bleeding agent type, checking matter
Matter, shortcoming type and temperature, in 15~50 DEG C of temperature ranges are suitable, time of penetration 10~15 minutes, in 3~15 DEG C of temperature ranges
Increase time of penetration；After preparation, it is necessary to fill remaining solvent cleaner and moisture content in the pre-cleaning process of checking matter surface
Divide drying.
Further, when temperature is within the scope of 15~50 DEG C, time of developing is 7~30 minutes when Liquid penetrant testing.
Further, defectoscope selects magnetic yoke formula to exchange magnaflux, and magnetic powder, which is selected, has high permeability when Magnetic testing
The black particle for being 2-10mm with low remanent magnetism property epigranular average particle size.
The technology of the present invention effect includes:
The present invention can ensure that engineering non-destructive testing construction speed is consistent with welding progress.And it can guarantee pipeline
The continuity of subsequent construction improves pipeline construction quality and efficiency.
The present invention is in such a way that ultrasonic examination and radioscopy combine, it is ensured that engineering non-destructive testing construction speed with
Welding progress is consistent.Every since root bead welds on one side, and welder and supervisor will pay attention to the case where checking welding bead,
See if there is abnormal conditions, such as stomata, crackle, slag inclusion.After complete weld bond is soldered together, comprehensive inspection is done to presentation quality
It looks into.After visual examination qualification, next step flaw detection can be carried out.This engineering is completely all made of double hundred flaw detections, and (i.e. ray is examined
100% is surveyed, ultrasonic wave 100%)；It is all being able to use crawl device, use crawl device.If meeting defect in detection process to sentence
Determine query, contrastive reinspection must be carried out with ultrasonic wave.
Specific embodiment
Be described below and specific embodiments of the present invention be fully shown, with enable those skilled in the art to practice and
It reproduces.
Pipeline non-destructive testing construction method, specifically includes the following steps:
Step 1: understand before detection the material of tested pipeline, thickness, curvature, group to situation, groove type, welding method,
Weld reinforcement, weld width and groove；
Step 2: finished in welding, weld seam after visual examination is qualified using digital type ultrasound wave detector to welding after
Pipeline implements non-destructive testing；
The material for having delayed crack to be inclined to should be carried out non-destructive testing at least after 24 hours after the completion of welding.Digital ultrasound
Wave detector, operating frequency range are 1~10MHz, and horizontal linearity error is not more than 1%, and vertical linearity error is not more than
5%.When adjacent two construction section connection (touching dead mouth) welding when, should as far as possible by welding when environment temperature select at 20 DEG C or so,
To reduce thermal (temperature difference) stress.
Step 3: opening digital type ultrasound wave detector power supply, connection probe, regulated attenuator will test sensitivity adjustment
To evaluate line sensitivity, probe is placed in weld seam two sides and makees sawtooth pattern scanning；
Using monocrystalline angle probe, beam axis offset angle is not more than 2o, and Main beam vertical direction should not have obviously
It is bimodal.
In the circuit pack of pipeline, X-ray pipeline crawl device is selected to straight pipe, transillumination of saturating method in center.It crashes
Dead mouth or straight tube and elbow and can not the transillumination in center weld seam using double-walled list shadow segmentation transillumination.X-ray pipeline is creeped
The work step of device is as follows:
1, the preparation of crawl device
A. the height that ray head is adjusted by vertical slide, is at center (the i.e. ray to weld seam of pipe
Be equidistant).
B. the height of instruction source recipient is adjusted at about 25 millimeters of the top away from pipe, to reach to the best of instruction
Acceptable effect.
C. determine that all attachmentes are correctly connected and fixed.
D. battery charges:
It checks whether battery charges completely, before powering on, battery and charger is connected, then again
It is switched with channel selector and checks that each battery is shown in the voltage in instrument, powered on, switched with channel selector
Check whether ammeter provides the reading of each battery.
E. the cooperation for checking instruction with command receiver, pipe crawling device is put into single cell and is tested, instruction source hair
It instructs out, instruction recipient accurately receives and pipe crawling device tool is made correctly to work.
2, film is arranged
A. marking plate is identified, the font on making ruler should be 5~10 millimeters apart from weld seam, and marking plate, making ruler and weldering
It is parallel to stitch direction.
B. image quality indicator should place one every 90 °, and steel wire is across weld seam and vertical with weld seam.
C. it should be arranged clockwise along flow direction of medium when gluing sheet, cover film weld seam all.The overlap joint of film
Length should be not more than 40 millimeters.
D. film is prevented to be folded and squeeze when load, pieces of cloth, patch.
E. instruction source should be far from film, to avoid light reaching the film.
For valve chamber, yard part, diameter is less than or equal toPipeline use double-walled slur transillumination, diameter is greater thanPipeline and touch weld seam that dead mouth or straight tube are connect with elbow transillumination be segmented using double-walled list shadow.Root is provided according to standard
Corresponding distance-wave amplitude (DAC) curve is drawn according to wall thickness.
(1) every time before detection and after detection, should adjust the distance in reference block -- amplitude curve is verified, verification
No less than 2 points of point.
(2) when scanning ratio verifies, such as finding that checkpoint back wave deviates in scan line is more than former checkpoint scale reading
10% or full-scale 5% (the two minimum value), then scanning ratio re-calibrates, record after previous verification shortcoming, position
Parameter should redeterminate.
(3) distance -- when amplitude curve verifies, the back wave of such as discovery checkpoint reduces by 20% or 2dB or more than curve, then
Instrumental sensitivity should be readjusted, and detect again to the whole weld seams detected after last time correction.Such as find the reflection of checkpoint
Bobbi curve increases by 20% or 2dB or more, and instrumental sensitivity should be readjusted, and shortcoming recorded after last time correction, answers
Shortcoming dimensional parameters are redeterminated and are evaluated again.
(4), if continuous work, carry out within 4 hours reviewing primary.
(5) if the sensitivity revised before flaw detection is not achieved in discovery sensitivity when verification, then from last time after flaw detection
Instrument verification qualification start to this verify it is unqualified until all ultrasound examination results it is invalid, cope with this detection content
Re-start detection.
The movement speed of probe is not greater than 150mm/s, and probe should have 15% overlapping along the displacement of bead direction.In order to
Check lateral shortcoming, should also carry out parallel or lateral scan with oblique angle, detection sensitivity at this time in weld seam two sides should improve 6dB.
1, shortcoming is quantitative
After echo is lacked in discovery, regulated attenuator determines the area where shortcoming maximum reflection wave.When shortcoming reflects wave amplitude
It should sentence when positioned at IIIth area useless；When lacking only one high point of back wave and being located at IIth area, with the instruction of 6dB method measurement shortcoming
Length；When the back wave that lacks has multiple high points and is located at IIth area, with the indicating length of endpoint 6dB method measurement shortcoming.
2, shortcoming positioning
When shortcoming reflection wave amplitude is more than IIth area and IIth area, horizontal position and the buried depth of shortcoming should be determined.
3, shortcoming record
To shortcoming of the shortcoming reflection wave amplitude more than IIth area and IIth area, position, the buried depth, instruction of shortcoming should all be recorded
Length and highest back wave wave amplitude.
Step 4: Liquid penetrant testing is made to the weld seam of pipeline；
Liquid penetrant testing can be carried out after visual examination is qualified.Tested surface must not have iron rust, oxide skin, splashing, iron filings, hair
Thorn, other dirts and various protective layers, surface roughness should be less than or are equal to 12.5um.It, can be in weld seam when appearance of weld is preferable
Liquid penetrant testing is done under natural conditions.When ripple influences Liquid penetrant testing, it should be handled.Select DPT-5 type liquid penetrant testing agent.
(1) application cleaning agent carries out prerinse to its surface before detection, must not there is the objects such as greasy dirt；Do not allow using sandblasting,
Shot-peening etc. may block the method processing of shortcoming opening.When carrying out part detection to examined workpiece surface, pretreatment work range
25mm (weld seam two sides 25mm) should be extended to the outside from detection position surrounding.
(2) after preparation, it is necessary to fill remaining solvent cleaner and moisture content etc. in the pre-cleaning process of checking matter surface should
Divide drying.Using spray cans formula penetrating fluid, nozzle is close to detection surface about 100mm when spraying, and preparing spray area should not be excessive, spray
Applying will uniformly, and the surface for keeping bleeding agent to will test position at the appointed time all soaks.And in entire time of penetration
Keep wetting state.
(3) time of penetration: time of penetration depends on bleeding agent type, the material of checking matter, shortcoming type and temperature.15
In~50 DEG C of temperature ranges are suitable, time of penetration 10~15 minutes, suitably increase time of penetration in 3~15 DEG C of temperature ranges, when wet
Degree should then be tested more than 50 DEG C or when being lower than 3 DEG C and separately consider to determine.
(4) extra bleeding agent is cleaned, is successively wiped with the cloth not lost hair or feathers completely, until most of extra bleeding agent is removed
Afterwards, then with the cloth or paper not lost hair or feathers completely for being moistened with cleaning agent it is wiped, until the extra bleeding agent of plane was seized is all wiped
Only, but it has to be noticed that must not back and forth wipe, not handy cleaning agent is directly rinsed in plane was seized.
(5) over cleaning is prevented, and not handy cleaning agent, which directly sprays against detection faces or cleaning agent is swung to detection faces, to be gone clearly
It washes.
Imaging agent should sufficiently be shaken before use make its uniformly, application answer it is uniform and thin, can not same place repeatedly
Repeatedly apply, nozzle is 300~400mm from tested surface distance, and sprinkling direction and plane was seized angle are 30~40 degree；Sprinkling is aobvious
When as agent, nozzle is advisable away from plane was seized for 300mm.
(7) time of developing: when temperature is within the scope of 15~50 DEG C, time of developing is 7~30 minutes, is become according to environment temperature
Change difference degree can appropriate adjustment time of developing, and be illustrated in report.If above each detecting step fault does not meet skill
Art requirement, it is necessary to complete above steps again since pre-treatment.
(8) observation should carry out under conditions of tested surface visible light illumination is greater than 500LX, when necessary, put using 5-10 times
Big mirror is observed.
(9) detect record: carrying out original record, be clearly that linear shortcoming or circle are lacked, record shortcoming display size,
Quantity, position, when necessary using diagram.Digital camera can be used to be filmed shortcoming display, shortcoming display mark trace is printable
In report, and inputs in computer and saved as data.Detection scene is to be shown in workpiece surface to exceeded shortcoming convenient for reprocessing
It is clearly marked with oily marking pen.
After detection, prevents remaining imaging agent corrosion workpiece surface or influence its use.Remaining imaging agent should be removed.
The methods of sweep-out method can be washed with scrub, washing, cloth or paper is wiped.The low-alloy steel material for having delayed crack to be inclined to is in postwelding 24
Hour detection detects for high strength steel postwelding 36 hours.For heat treated part, detected after final heat treatment.
Step 5: Magnetic testing is carried out to the weld seam of pipeline.
Defectoscope selects magnetic yoke formula to exchange magnaflux.When spacing is 200mm, indirect current harness should at least have 44N
Lifting force.
The black particle that magnetic powder, which is selected, has high permeability and low remanent magnetism property epigranular average particle size is 2-10mm.By its
It is configured to that sodium nitrite appropriate is added by medium of water, washing powder and defoaming agent, granularity should be controlled in 5000-20000Pa.S
(250C), concentration 10-20g/l.
Polishing derusting should be carried out for weld seam and two sides, there must not be the substance of grease or other adherency magnetic powders.Examined workpiece
Surface roughness be not more than 12.5um.There is can detecting a flaw for 24 hours after welding for particular/special requirement.
It is detected a flaw using continuity method, should at least carry out independent detection twice, the magnetic line of force side detected twice in a tested area
To should be generally perpendicular to each other.Magnetic flaw detection ink must apply within conduction time to be finished, conduction time 1-3S.Stop applying magnetic flaw detection ink at least 1S
It can just stop magnetizing afterwards.Magnetic pole pitch should control between 50-200mm.Magnetized area should have the overlapping of 15mm every time.
Flaw detection sensitivity faces outwardly when selecting A type Calibration Piece for Sensitivity (middle-grade) verification by test piece is flawless, to make test piece
It is good with tested face contact, can with adhesive tape by its it is smooth be pasted onto plane was seized, and notice that adhesive tape cannot cover test piece
Artificial defect.
It should be understood that the foregoing is merely a specific embodiment of the invention, but protection scope of the present invention is not
It is confined to this, anyone skilled in the art in the technical scope disclosed by the present invention, can readily occur in variation
Or replacement, it should all be included within the scope of the present invention.Therefore, protection scope of the present invention should be with the claim
Protection scope subject to.
Claims (5)
1. a kind of pipeline non-destructive testing construction method, comprising:
The material for being detected pipeline, thickness, curvature, group are understood before detection to situation, groove type, welding method, weld reinforcement, weldering
Slit width degree and groove；Finished in welding, weld seam after visual examination is qualified using digital type ultrasound wave detector to welding after
Pipeline implements non-destructive testing；
Digital type ultrasound wave detector power supply, connection probe are opened, regulated attenuator will test sensitivity adjustment as evaluation line spirit
Probe is placed in weld seam two sides and makees sawtooth pattern scanning by sensitivity；
Liquid penetrant testing and Magnetic testing are made to the weld seam of pipeline, it is ensured that weld seam zero defect.
2. pipeline non-destructive testing construction method as described in claim 1, it is characterised in that: the material for having delayed crack to be inclined to should be extremely
It is few to be carried out non-destructive testing after 24 hours after the completion of welding；Digital type ultrasound wave detector operating frequency range is 1~10MHz,
Horizontal linearity error is not more than 1%, and vertical linearity error is not more than 5%.
3. pipeline non-destructive testing construction method as described in claim 1, it is characterised in that: with cleaning agent to its table before Liquid penetrant testing
Face carries out prerinse, must not there is the objects such as greasy dirt；Do not allow to block at the method for shortcoming opening using sandblasting, shot-peening etc.
Reason；Time of penetration depends on bleeding agent type, the material of checking matter, shortcoming type and temperature, suitable in 15~50 DEG C of temperature ranges
Interior, time of penetration 10~15 minutes, 3~15 DEG C of temperature ranges are interior to increase time of penetration；After preparation, it is necessary to make checking matter table
Remaining solvent cleaner and moisture content are sufficiently dry in the pre-cleaning process of face.
4. pipeline non-destructive testing construction method as described in claim 1, it is characterised in that: when Liquid penetrant testing, when temperature 15~
Within the scope of 50 DEG C, time of developing is 7~30 minutes.
5. pipeline non-destructive testing construction method as described in claim 1, it is characterised in that: when Magnetic testing, defectoscope selects magnetic
Yoke formula exchanges magnaflux, and magnetic powder, which is selected, has high permeability and low remanent magnetism property epigranular average particle size is 2-10mm's
Black particle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811340536.2A CN109507287A (en) | 2018-11-12 | 2018-11-12 | Pipeline non-destructive testing construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811340536.2A CN109507287A (en) | 2018-11-12 | 2018-11-12 | Pipeline non-destructive testing construction method |
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| CN109507287A true CN109507287A (en) | 2019-03-22 |
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| CN201811340536.2A Pending CN109507287A (en) | 2018-11-12 | 2018-11-12 | Pipeline non-destructive testing construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907466A (en) * | 2019-08-26 | 2020-03-24 | 徐州东坤耐磨材料有限公司 | Quality detection process for water pump impeller |
| CN111239147A (en) * | 2020-01-19 | 2020-06-05 | 山东电力工业锅炉压力容器检验中心有限公司 | Darkroom-free fluorescence penetration detection method for tube bank clamping block of high-temperature heating surface of power station boiler |
| CN112229912A (en) * | 2020-10-15 | 2021-01-15 | 华能济宁运河发电有限公司 | Three-way crack vibration frequency measurement and check method |
| CN112304967A (en) * | 2020-10-14 | 2021-02-02 | 华电电力科学研究院有限公司 | Method for automatic coloring and penetration detection in power station pipeline pre-inspection stage |
| CN113125473A (en) * | 2020-01-13 | 2021-07-16 | 中国石油天然气集团有限公司 | Pipeline X-ray digital imaging detection equipment calibration method |
| CN113640371A (en) * | 2021-08-04 | 2021-11-12 | 翟义恒 | Steel structure weld joint detection process |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110907466A (en) * | 2019-08-26 | 2020-03-24 | 徐州东坤耐磨材料有限公司 | Quality detection process for water pump impeller |
| CN113125473A (en) * | 2020-01-13 | 2021-07-16 | 中国石油天然气集团有限公司 | Pipeline X-ray digital imaging detection equipment calibration method |
| CN113125473B (en) * | 2020-01-13 | 2022-08-30 | 中国石油天然气集团有限公司 | Pipeline X-ray digital imaging detection equipment calibration method |
| CN111239147A (en) * | 2020-01-19 | 2020-06-05 | 山东电力工业锅炉压力容器检验中心有限公司 | Darkroom-free fluorescence penetration detection method for tube bank clamping block of high-temperature heating surface of power station boiler |
| CN112304967A (en) * | 2020-10-14 | 2021-02-02 | 华电电力科学研究院有限公司 | Method for automatic coloring and penetration detection in power station pipeline pre-inspection stage |
| CN112229912A (en) * | 2020-10-15 | 2021-01-15 | 华能济宁运河发电有限公司 | Three-way crack vibration frequency measurement and check method |
| CN113640371A (en) * | 2021-08-04 | 2021-11-12 | 翟义恒 | Steel structure weld joint detection process |
| CN113640371B (en) * | 2021-08-04 | 2023-12-01 | 山东知行智能装备有限公司 | Steel structure welding line detection process |
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Application publication date: 20190322 |