CN103776853B - A kind of reference block detecting the lack of penetration degree of depth of small diameter tube weld bond - Google Patents
A kind of reference block detecting the lack of penetration degree of depth of small diameter tube weld bond Download PDFInfo
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- CN103776853B CN103776853B CN201410064174.4A CN201410064174A CN103776853B CN 103776853 B CN103776853 B CN 103776853B CN 201410064174 A CN201410064174 A CN 201410064174A CN 103776853 B CN103776853 B CN 103776853B
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Abstract
The invention provides a kind of reference block detecting the lack of penetration degree of depth of small diameter tube weld bond, belong to data monitoring technical field.It solve the existing reference block for detecting the lack of penetration degree of depth of small diameter tube weld bond use inconvenience and determine not accurate enough problem to lack of penetration depth range.This reference block, comprises the test block body of a tubulose, the internal face of test block body is provided with the artificial defect groove of at least one hoop, and test block body outer wall face is provided with simulation weld reinforcement corresponding on the position of artificial defect groove.It simulates the lack of penetration degree of depth by arranging artificial defect groove in test block inner body wall, and simulates the weld seam of weld bond by arranging simulation weld reinforcement, and during detection, contrast more accurately, obviously and intuitively.It can directly with need testing pipes to be placed in together to contrast, it is more directly perceived and quick whether evaluation needs the lack of penetration degree of depth of testing pipes small diameter tube weld bond to exceed standard.
Description
Technical field
The present invention relates to a kind of data detection device, particularly a kind of reference block detecting the lack of penetration degree of depth of small diameter tube weld bond.
Background technology
Pressure pipeline is a kind of extraordinary bearing device with explosion danger, it can be used as the core facility of many special equipments or system, be responsible for the conveying task of high temperature, high pressure, inflammable, explosive, hypertoxic, deep-etching or radioactivity material, in the development of the national economy, occupy critical role.The integrality of pressure pipeline is directly connected to the safety of production, once occur to leak or blast, often causes catastrophic failure.For ensureing its safe operation, adopting suitable method to carry out regular detection to it and being extremely necessary.In pressure pipeline manufacture or use procedure, ubiquity a large amount of defect, because the connection of current pressure pipeline adopts welding manner more, the weak link of butt-weld place pipeline often, the various defect of easy generation and damage, be wherein at most especially with incomplete penetration defect, bring serious threat to the safe handling of pressure pipeline.Therefore the security how detected containing the pressure pipeline of incomplete penetration defect is the focus that current academic and engineering circles is both at home and abroad studied, in order to expected life and the security of accurate evaluation pressure pipeline, Measurement accuracy must be made to the degree of depth of incomplete penetration defect, further could carry out Stress Check and fracturing mechanics estimation etc. on this basis, and then evaluation is provided to the security of pipeline.
What the complete examination of the current using pressure pipe of China performed at present is " using Regular Inspection of Pressure Pipelines code " tentative No. [2003] 108, quality inspection pot, hereinafter referred to as " industrial pipeline inspection rule ", this regulations stipulate carries out REASON ANALYSIS ON WELDING SEAM to the lack of penetration weld defects that waits found in complete examination according to the regulation of " industrial pipeline inspection rule " chapter 4, can define the level under certain is special by local reduction.
The major accident of Changchun, Jilin, Shanghai Liang Shean enterprise is occurred in for 2013, State General Administration for Quality Supervision issues quality inspection on November 4th, 2013 and to write (2013) No. 61 letters " special equipment office of State Administration of Quality Supervision, Inspection and Quarantine is about the instruction of ammonia refrigerating installation special equipment special administration work ", to with ammonia be medium refrigerating plant in pressure pipeline control propose instruction, especially to low temperature side ammonia refrigeration pressure pipeline allow exist the lack of penetration degree of depth there has also been particular provisions.
Insider all knows, according to JB/T4730.2-2005 " bearing device Non-Destructive Testing part 2: ray detection ", for overall diameter D
0the small diameter tube of≤100mm, when detecting lack of penetration, have employed special reference block and the I of standard annex H regulation
atype and I
btype.This standard rating content and test block are all only applicable to situation during ratio≤15% that small diameter tube is lack of penetration and internal concave at root depth of defect is with wall thickness.
For determining by the safe condition grade of industrial pipeline, according to " industrial pipeline inspection rule " the 49 article, when the material of pipe is 20 steel, 16Mn or austenitic stainless steel, lack of penetrationly can to define the level by local reduction.The lack of penetration depth requirements existed is allowed greatly to relax to using pressure pipe.And write in (2013) No. 61 letters in quality inspection, and to the low temperature side ammonia refrigeration pressure pipeline by 3 grades of evaluation safety status grades, regulation " the lack of penetration degree of depth and the pipeline ratio of surveying wall thickness is less than 0.6, and bottom defect minimum wall thickness (MINI W.) >=2mm ".So, the special reference block that JB/T4730.2-2005 standard and included standard annex H thereof specify and I
atype and I
btype cannot be applicable to the ray detection of incomplete penetration defect depth range of above-mentioned code, documentation requirements.Thus need the reference block seeking a kind of new ray detection to meet existing code and file new demand.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of reference block detecting the lack of penetration degree of depth of small diameter tube weld bond, it is close with the small diameter tube mouth structure that need detect, can directly and need testing pipes to be placed in together to contrast, it is more directly perceived and quick whether evaluation needs the lack of penetration degree of depth of testing pipes small diameter tube weld bond to exceed standard.
Object of the present invention realizes by following technical proposal: a kind of reference block detecting the lack of penetration degree of depth of small diameter tube weld bond, it is characterized in that, comprise the test block body of a tubulose, the internal face of described test block body is provided with the artificial defect groove of at least one hoop, described test block body outer wall face is provided with simulation weld reinforcement corresponding on the position of artificial defect groove.
The general diameter of path pressure pipeline to be detected and wall thickness less, diameter and the wall thickness of pressure pipeline are less, and weld seam is generally hoop butt-weld, welding by one side, and inside surface very easily exists incomplete penetration defect, and defect is also generally hoop.In the technical program, take and the pipe test block as a comparison needing the material gamma ray absorption coefficient of testing pipes identical or close, and the caliber size of this reference block is identical with needing the caliber size of testing pipes or close, arranged and above-mentioned incomplete penetration defect akin hoop artificial defect groove by the internal face at test block body, and be provided with the simulation weld reinforcement with certain altitude corresponding in the outside wall surface on the position of artificial defect groove, blackness contrast is carried out by ray detection when detecting, thus check and evaluation is carried out to the lack of penetration degree of depth of the weld bond of small diameter tube.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the number of described artificial defect groove is 3, and the spacing between described adjacent artificial defect groove is 3 ~ 20mm.The reference block with 3 artificial defect grooves can be used as universal lack of penetration depth correlation test block, when evaluation needs the lack of penetration depth range of testing pipes, judge with 3 artificial defect channel black degree of reference block respectively with the lack of penetration blackness of pipe welding port, thus draw the depth range residing for incomplete penetration defect.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the groove width of described artificial defect groove is 1.0 ~ 2.5mm, and groove depth is 0.5 ~ 2.0mm.The defect standard of defined during above-mentioned numerical value is applicable to " using Regular Inspection of Pressure Pipelines code " (trying).
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the number of described artificial defect groove is 1.Only have the reference block of wall scroll artificial defect groove and can be used as the lack of penetration depth correlation test block of ammonia pipeline tailored version, it is as reference block, and above-mentioned numerical value is applicable to quality inspection and writes the defect standard of defined in (2013) No. 61 letters.When the lack of penetration depth correlation of the ammonia pipeline that need detect exceeds this reference block, be then assessed as safety status grade more than 3 grades.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the groove width of described artificial defect groove is 1.0 ~ 2.5mm, and groove depth is 0.5 ~ 2.5mm.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the tube outer diameter of described test block body is 25 ~ 89mm, and pipe thickness is 2.0 ~ 5.0mm.The above-mentioned common-use size specification being of a size of small diameter tube.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the height of described test block body is 80 ~ 150mm.Be preferably 100mm.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, described simulation weld reinforcement is the convex annular edge being arranged on outwardly convex on test block body outer wall face.This convex annular, along directly being processed by thick-walled pipe, is integral type structure with thick-walled pipe, not fragilely comes off, and service time is longer.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, described simulation weld reinforcement is the annular layer being welded on outwardly convex on test block body outer wall face by manual simulation.Artificial manual layer with need the gamma ray absorption coefficient of the weld seam in testing pipes more close, contrast Detection results more accurate.
In the reference block of the above-mentioned lack of penetration degree of depth of detection small diameter tube weld bond, the height of described simulation weld reinforcement is 0.5 ~ 3.0mm.This numerical value is in the majority with 1.5 ~ 2.5mm, and preferred value is 2mm, and the width of simulation weld reinforcement should exceed the enough width in artificial defect groove two edges to prevent image overlap.
Compared with prior art, the present invention has following advantage: this reference block is easy to use, by by test block body directly with need detect small diameter tube and be placed in together, irradiated by radiographic source, thus the blackness value obtaining weld seam blackness value that is direct and reference block is compared, depth correlation process is more obviously with directly perceived, and whether the lack of penetration degree of depth that can assess small diameter tube weld bond quickly meets standard.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiments of the invention one.
Fig. 2 is the sectional view of embodiments of the invention one.
Fig. 3 is the sectional view of embodiments of the invention two.
Fig. 4 is the sectional view of embodiments of the invention three.
Fig. 5 is the sectional view of embodiments of the invention four.
In figure, 1, test block body; 2, weld reinforcement is simulated; 3, artificial defect groove; The spacing of the artificial defect groove of A, general reference block; The groove width of a, artificial defect groove; The height of L, test block body; H, simulation weld reinforcement reinforcement; The artificial defect groove deep one of h1, general reference block; The artificial defect groove deep two of h2, general reference block; The artificial defect groove deep three of h3, general reference block; The artificial defect groove deep of h4, the special reference block of ammonia pipeline.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Embodiment one:
With reference to Fig. 1, the present embodiment one is for one is for detecting overall diameter D
0the universal reference block of the lack of penetration degree of depth of small diameter tube weld bond of≤100mm, such reference block comprises the test block body 1 of a tubulose, the internal face of test block body 1 is provided with the artificial defect groove 3 of 3 hoops, test block body 1 outside wall surface is corresponding to the position of artificial defect groove 3 being provided with simulation weld reinforcement 2, the width of simulation weld reinforcement 2 is not less than the overall width of 3 artificial defect grooves 3, namely simulate the width of weld reinforcement 2 and should exceed the enough width in the both sides of the edge of artificial defect groove 3 to prevent image overlap, fully can simulate the layer structure of small diameter tube docking location, the height L of test block body 1 is 80 ~ 150mm, be preferably 100mm.The structure that simulation weld reinforcement 2 in the present embodiment is integrated with test block body 1, directly processed, be positioned at the convex annular edge of outwardly convex in test block body 1 outside wall surface by thick-walled pipe, the height of this simulation weld reinforcement 2 is 0.5 ~ 3.0mm, is generally 1.5 ~ 2.5mm, is preferably 2mm.In the present embodiment, the groove width scope of 3 artificial defect grooves 3 is 1.0 ~ 2.5mm, and groove depth is different, and increases successively or reduce, and groove depth scope is 0.5 ~ 2mm, and the spacing A between two adjacent artificial defect grooves 3 is equal, and spacing A is 3 ~ 20mm.
The size of the reference block in the present embodiment, in order to suitable with the small diameter tube that need detect, generally has special value, and concrete numerical value is as shown in the table:
Unit: mm
Embodiment two:
With reference to Fig. 3, the structure of the present embodiment two is substantially identical with embodiment one, difference be in, the simulation weld reinforcement 2 of the reference block in the present embodiment two is the annular layer being welded on outwardly convex in test block body 1 outside wall surface by manual simulation, can simulate fully the weld bond of small diameter tube joint, simulation degree is higher.
In the present embodiment two, each dimensions of reference block is all identical with embodiment one.
Embodiment three:
With reference to Fig. 4, the present embodiment three is for one is for detecting overall diameter D
0the tailored version reference block of the lack of penetration degree of depth of path ammonia pipeline pipe weld bond of≤100mm, such reference block comprises the test block body 1 of a tubulose, the internal face of test block body 1 is provided with the artificial defect groove 3 of 1 hoop, test block body 1 outside wall surface is corresponding to the position of artificial defect groove 3 being provided with simulation weld reinforcement 2, the width of simulation weld reinforcement 2 should exceed the enough width in the both sides of the edge of artificial defect groove 3 to avoid image overlap, fully can simulate the layer structure of path ammonia pipeline docking location, the height L of test block body 1 is 80 ~ 150mm, be preferably 100mm.Simulation weld reinforcement 2 in the present embodiment is structure as a whole with test block body 1, it is the convex annular edge directly being processed, be positioned at outwardly convex in test block body 1 outside wall surface by thick-walled pipe, the height of this simulation weld reinforcement 2 is 1.5 ~ 2.5mm, is preferably 2mm.In the present embodiment, the groove width scope of artificial defect groove 3 is 1.0 ~ 2.5mm, and groove depth scope is 0.5 ~ 2.5mm.
The size of the reference block in the present embodiment is in order to suitable with the path ammonia pipeline that need detect, and have special value, concrete numerical value is as shown in the table:
Unit: mm
| The external diameter Ф of reference block | The wall thickness δ of reference block | Groove width a | Groove depth h4 |
| 25 | 2.5 | 1.0 | 0.5 |
| 38 | 3 | 1.0 | 1.0 |
| 45 | 3 | 1.0 | 1.0 |
| 57 | 3.5 | 1.5 | 1.5 |
| 76 | 4 | 2.0 | 2 |
| 89 | 4 | 2.0 | 2 |
| 89 | 4.5 | 2.0 | 2.5 |
Embodiment four:
With reference to Fig. 5, the structure of the present embodiment four is substantially identical with embodiment three, difference be in, the simulation weld reinforcement 2 of the reference block in the present embodiment four is by the artificial manual annular layer being welded on outwardly convex in test block body 1 outside wall surface, can simulate fully the weld bond of small diameter tube joint, simulation degree is higher.
In the present embodiment four, each dimensions of reference block is all identical with embodiment three.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ test block body 1, simulation weld reinforcement 2, artificial defect groove 3, the spacing A of artificial defect groove of general reference block, the groove width a of artificial defect groove, the height L of test block body, the term such as height H, artificial defect groove deep one h1 of general reference block, artificial defect groove deep two h2 of general reference block, artificial defect groove deep three h3 of general reference block, the artificial defect groove deep h4 of the special reference block of ammonia pipeline of simulation weld reinforcement herein, do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (10)
1. one kind is detected the reference block of the lack of penetration degree of depth of small diameter tube weld bond, it is characterized in that, comprise the test block body (1) of a tubulose, the internal face of described test block body (1) is provided with the artificial defect groove (3) of at least one hoop, described test block body (1) outside wall surface is provided with simulation weld reinforcement (2) corresponding on the position of artificial defect groove (3), the width of described simulation weld reinforcement (2) is greater than the width of artificial defect groove (3), and the two ends on simulation weld reinforcement (2) Width all exceed the two ends on artificial defect groove (3) Width.
2. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1, is characterized in that, the number of described artificial defect groove (3) is 3, and the spacing between described adjacent artificial defect groove (3) is 3 ~ 20mm.
3. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 2, is characterized in that, the groove width of described artificial defect groove (3) is 1.0 ~ 2.5mm, and groove depth is 0.5 ~ 2.0mm.
4. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1, is characterized in that, the number of described artificial defect groove (3) is 1.
5. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 4, is characterized in that, the groove width of described artificial defect groove (3) is 1.0 ~ 2.5mm, and groove depth is 0.5 ~ 2.5mm.
6. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, the tube outer diameter of described test block body (1) is 25 ~ 89mm, and pipe thickness is 2.0 ~ 5.0mm.
7. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, the height of described test block body (1) is 80 ~ 150mm.
8. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, described simulation weld reinforcement (2) is for being arranged on the convex annular edge of outwardly convex in test block body (1) outside wall surface.
9. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, described simulation weld reinforcement (2) is the annular layer being welded on outwardly convex in test block body (1) outside wall surface by manual simulation.
10. the reference block of the lack of penetration degree of depth of detection small diameter tube weld bond according to claim 1 or 2 or 3 or 4 or 5, it is characterized in that, the height of described simulation weld reinforcement (2) is 0.5 ~ 3.0mm.
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| CN109360669A (en) * | 2018-09-22 | 2019-02-19 | 中核能源科技有限公司 | A kind of weld seam hollow depth assessment method for high temperature gas cooled reactor ball flow tube road |
| CN109855938A (en) * | 2019-03-29 | 2019-06-07 | 国网河南省电力公司电力科学研究院 | A kind of detection test block of disc insulator digital radial and detection method |
| CN110618147B (en) * | 2019-10-25 | 2022-07-05 | 东方电气集团东方锅炉股份有限公司 | System and method for measuring height of incomplete penetration defect of tube-tube plate fillet weld |
| CN114720490B (en) * | 2022-03-23 | 2024-04-30 | 绍兴市特种设备检测院 | Quantitative detection method for depth of incomplete penetration of pipeline based on digital rays |
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