CN109100428A - A kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety - Google Patents
A kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety Download PDFInfo
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- CN109100428A CN109100428A CN201811087095.XA CN201811087095A CN109100428A CN 109100428 A CN109100428 A CN 109100428A CN 201811087095 A CN201811087095 A CN 201811087095A CN 109100428 A CN109100428 A CN 109100428A
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- G—PHYSICS
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- 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
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Abstract
The present invention relates to check and evaluation authentication techniques fields, provide a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety, comprising: S1, choose test pipe, the backfill amount L after acquisition test pipe welding at defect of pipeline；S2, simulation pipeline is chosen, and marked on simulation pipeline for making several positions of simulation hole defect；S3, to drilling at several positions of label with obtain simulation hole, simulate hole depth be greater than backfill amount L；S4, the mutual welding in one end that two simulation pipelines are had to simulation hole, or pipeline one end and normal pipeline welding with simulation hole will be simulated, form the simulation connector with hole defect.When can accurately detect the size and location of simulation connector mesoporous hole defect using supersonic damage-free detection method, illustrate that the detection method detection accuracy is high, therefore, the hole defect in pipe joint in capable of ensuring to construct also can accurately detected, making the construction of HDPE pipeline has quality assurance, highly-safe advantage.
Description
Technical field
The present invention relates to check and evaluation authentication techniques fields, especially provide a kind of 3 grades of HDPE pipeline A holes of nuclear safety
The preparation method of defect.
Background technique
Currently, metal material before carrying out Ultrasonic NDT, is generally demarcated detection accuracy using reference block,
The through-hole of several different sizes is drilled in reference block, position of the through-hole in reference block is known.But for HDPE
For (High Density Polyethylene, high density polyethylene (HDPE)) material, conventional supersonic damage-free detection method to it simultaneously
It is not applicable, also without corresponding HDPE reference block.
When HDPE pipeline is laid with, mainly it is attached using welding process, by pressure, temperature, time, wind speed, air
The complicated factors such as humidity influence, and are likely to occur small hole defect inside fusion splice, so that the bearing capacity of connector is influenced,
Welding quality is caused to decline.
In order to ensure fusion splice internal soundness, mostly use the method for Ultrasonic NDT to HDPE pipeline welding in recent years
Connector is detected, this method will not butt joint cause to damage, connector interior zone can be detected, can directly characterize welding quality
Quality, so to HDPE pipeline fusion splice quality control be very effective means.
The validity of supersonic damage-free detection method (or other lossless detection methods), it usually needs prepare a series of containing people
The simulating piece of work defect is verified, these artificial defects are all implanted into simulating piece with controlled manner, accurately knows defect in advance
Size and location.When needing to verify non-destructive testing technology and technique, the simulating piece of corresponding specification can be chosen, to it
Complete non-destructive testing operation is carried out, and feeds back the defect size detected and situation, because of the previously known simulating piece
The information of middle defect, by comparison can specify the non-destructive testing technology and technique validity and precision how.By it is above-mentioned can
Know, the simulating piece preparation comprising artificial defect, for determining that the validity of non-destructive testing technology has great importance, it can be true
Detection accuracy when site operation pipe detection is protected, welding quality is accurately reflected, right and wrong are controlled for HDPE pipeline welding quality
Often important link.
In HDPE pipeline welding defect, hole class manual simulation's defect is one kind of more difficult preparation, the preparation of hole defect
Difficult point is its size Control, and in fusing operation, pipe joint is formed by multiple links such as heating, extruding, crimping, institute
When preparing defects simulation part, therefore, to assure that the artificial defect in connector is after the completion of heating and extruding, size and position
It can also remain unchanged.
But it is also unable to ensure centainly will appear the hole of a certain size in a certain position of fusion splice in the prior art
Hole.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of 3 grades of HDPE pipeline A hole defects of nuclear safety, it is intended to
Solve the uncertain technical problem of size and position of hole defect when HDPE pipeline welding in the prior art.
To achieve the above object, the technical solution adopted by the present invention is that: a kind of 3 grades of HDPE pipeline A holes of nuclear safety lack
Sunken preparation method, comprising the following steps:
S1, test pipe is chosen, obtains backfill amount L of the test pipe after fusing at defect of pipeline；
S2, simulation pipeline is chosen, and marked on simulation pipeline for making several positions of simulation hole defect；
S3, to drilling at several positions of the simulation hole defect of label to obtain simulation hole, the simulation hole
Depth is greater than the value of the backfill amount L；
S4, the mutual welding in one end that the two simulation pipelines are had to simulation hole, being formed, there is the simulation of hole defect to connect
Head；Or a simulation pipeline is had to one end and the normal pipeline welding in simulation hole, form the simulation with hole defect
Connector.
Further: the S1 the following steps are included:
S11, test pipe is chosen, and bores the blind hole that several depth are L1 in an end face of the test pipe；
S12, one end that the test pipe is drilled with to blind hole and normal pipeline welding form test joint, or will be described in two
The mutual welding in one end that test pipe is drilled with blind hole forms test joint；
S13, the test joint is cut, the remaining depth for measuring blind hole on the test pipe is L2；
The backfill amount L=L1-L2.
Further: the L1 >=15mm.
Further: before carrying out S11 step, confirming the end face of the test pipe and the axis phase of the test pipe
Vertically.
Further: the depth in the simulation hole is equal to the sum of the aperture for simulating hole and described backfill amount L.
Further: the depth >=15mm in the simulation hole
Further: several simulation holes are circumferentially equally distributed on the end face of the simulation pipeline.
Further: several simulation holes are in the cross end face for being distributed in the simulation pipeline.
Further: several simulation holes are distributed in the end face of the simulation pipeline in rice font.
A kind of beneficial effects of the present invention: the system of 3 grades of HDPE pipeline A hole defects of nuclear safety of offer of the invention
Preparation Method, by backfill amount L and simulates being determined in advance for hole site, simulates hole defect so being can determine that in simulation connector in advance
Size and location, when can prepare to detect using supersonic damage-free detection method and technique to simulate hole defect in simulation connector
Size and location when, illustrate the detection method and technique detection accuracy with higher, it is accordingly possible to ensure nuclear power station project
The hole defect in HDPE pipeline fusion splice in construction also can accurately detected, so that construction quality is demonstrated, phase
For the prior art, there is position and the size that can determine that HDPE pipeline fusion splice mesoporous hole defect, so that HDPE be made to manage
The construction in road has quality assurance, highly-safe advantage.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only of the invention some
Embodiment for those of ordinary skill in the art without any creative labor, can also be according to these
Attached drawing obtains other attached drawings.
Fig. 1 is the process of the preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety provided in an embodiment of the present invention
Schematic diagram；
Fig. 2 is the schematic diagram of pipeline end face drilling in the embodiment of the present invention；
Fig. 3 is the flow diagram of S1 step in the embodiment of the present invention；
Fig. 4 is the structural schematic diagram in the embodiment of the present invention before pipeline welding；
Fig. 5 is the structural schematic diagram in the embodiment of the present invention after pipeline welding.
Appended drawing reference: 10, pipeline is simulated；20, hole is simulated；L, backfill amount.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that, term " length ", " width ", "upper", "lower", "front", "rear",
The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside" is based on attached drawing institute
The orientation or positional relationship shown, is merely for convenience of description of the present invention and simplification of the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to limit of the invention
System.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the embodiment of the present invention, backfill amount refers to HDPE pipeline in welding, and the hole on pipeline is in the work of power that is squeezed
Under, that a part that hole is filled, remaining that a part not being filled of hole is hole defect, the embodiment of the present invention
Purpose is clearly determine the size and location of hole defect.
It please refers to shown in Fig. 1-Fig. 5, now to a kind of 3 grades of HDPE pipeline A holes of nuclear safety provided in an embodiment of the present invention
The preparation method of defect is described in detail.The preparation method of 3 grades of HDPE pipeline A hole defects of the nuclear safety include with
Lower step:
S1, test pipe is chosen, obtains backfill amount L of the test pipe after fusing at defect of pipeline；
S2, simulation pipeline is chosen, and marked on simulation pipeline for making several positions of simulation hole defect；
S3, to drilling at several positions of the simulation hole defect of label to obtain simulation hole, the simulation hole
Depth is greater than the value of the backfill amount L；
S4, the mutual welding in one end that the two simulation pipelines are had to simulation hole, being formed, there is the simulation of hole defect to connect
Head；Or a simulation pipeline is had to one end and the normal pipeline welding in simulation hole, form the simulation with hole defect
Connector.
Wherein the purpose of step S1 is backfill the amount L, step S2 of validation test pipeline for determining simulation pipeline upper mold
The position of quasi- hole defect, step S3 have simulation hole defect for ensuring to simulate on pipeline, wherein simulation hole defect
Depth is equal to the depth in simulation hole and the difference of backfill amount L, and step S4 is formed by simulation connector for verifying Ultrasonic NDT
The quality of technology and pipeline welding.
A kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety of offer of the invention, measures L by backfill
Confirm with being determined in advance for simulation 20 position of hole, and the depth in simulation hole 20 and the relationship of backfill amount L, so can determine that simulation
The size and location of simulation hole defect, can prepare to detect to simulate when using supersonic damage-free detection method and technique in connector
When simulating the size and location of hole defect in connector, illustrate the supersonic damage-free detection method and technique detection essence with higher
It spends, it is accordingly possible to ensure the hole defect in the HDPE pipeline fusion splice in nuclear power station project construction also can be detected accurately
Out, to demonstrate the construction quality of HDPE pipeline, relative to existing technologies, pass through supersonic damage-free detection method and technique
It can determine position and the size of HDPE pipe joint mesoporous hole defect, so that making the construction of HDPE pipeline has quality assurance,
Highly-safe advantage.
Equally, the preparation method of 3 grades of HDPE pipeline A hole defects of a kind of nuclear safety provided by the invention, can be used for
Verifying executes the qualification of the staff of supersonic damage-free detection method and technique, and staff only can be accurate by sets requirement
It detects the size and location for simulating hole defect in simulation connector, just can prove that the staff has carry out on-site test
The qualification of HDPE pipeline construction quality, so that the quality safety of HDPE pipeline construction be effectively ensured.
Equally, the preparation method of 3 grades of HDPE pipeline A hole defects of a kind of nuclear safety provided by the invention, can be used for
The precision for verifying pipeline fusion joining process and welder, only after pipeline welding, the size of fusion splice inner hole hole defect
When with position such as prior design, it could illustrate that the fusion joining process and welder are good.
Wherein, it is selected according to the specification or design requirement of different pipelines in the aperture of the position and simulation hole 20 of simulating hole 20
It selects and determines.
Specifically, in the present embodiment, step S1 the following steps are included:
S11, test pipe is chosen, and bores the blind hole that several depth are L1 in an end face of the test pipe；
S12, one end that the test pipe is drilled with to blind hole and normal pipeline welding form test joint, or will be described in two
The mutual welding in one end that test pipe is drilled with blind hole forms test joint；
S13, the test joint is cut, the remaining depth for measuring blind hole on the test pipe is L2；
Wherein, backfill amount L=L1-L2；In the present embodiment, the value of L, L1, L2 are average value, to guarantee that hole lacks
Fall into the accuracy of size.
Specifically, wherein the size of backfill amount L and the specification of pipeline, fusion joining process parameter are closely related, therefore, in determination
Before the backfill amount L of pipeline, the pipeline according to selection is needed, to set corresponding fusion joining process parameter, when subsequently selected identical
Pipeline when, fusion joining process parameter is also identical, to guarantee the consistency of same pipeline backfill amount L after fusing；Pipeline melts
It connects using dedicated heat welded equipment, utmostly guarantees accuracy and consistency that fusion joining process executes, it is effectively guaranteed that
The quality of welding interface, in welding, it is ensured that pipeline end face cleans, is dry, oil-free, and the relevant parameter of pipeline fusion joining process is in pipe
Road has been widely used in welding field, no longer states herein.
Specifically: in the present embodiment, L1 >=15mm, for HDPE pipeline in fusion process, backfill amount L can be less than 15mm,
Therefore L1 can offset the backfill effect of backfill amount L, it is ensured that still have certain depth of defect after pipeline welding.Welding is completed
Afterwards, connector is cut, the size L2 of the blind hole residue depth is accurately measured, it, can be really according to the variation of blind hole depth before and after welding
It is scheduled under the fusion joining process parameter, the size of pipeline backfill amount L.
According to the method, by the pipeline of different size under fusion joining process corresponding thereto, returning for each pipeline is obtained
The amount of filling out L records and is formed specification, so that subsequent reference uses and promotes.
Specifically, before carrying out S11 step, the end face of first validation test pipeline and the axis perpendicular of test pipe, this
The purpose that sample is done is in order to ensure after pipeline welding, the backfill amount L of each blind hole is identical on pipeline, to guarantee the standard of data
True property.
Specifically: in the present embodiment, the depth in simulation hole 20 is equal to the sum of aperture and the backfill amount L in simulation hole 20, because
This, after pipeline welding, according to the calculation formula of backfill amount L=L1-L2 it is found that defects with diameters, the depth of defect of hole defect
It is equal to the aperture in simulation hole, so in design, when being detected using ultrasonic non-destructive inspection techniques to hole defect, inspection
Measuring the defects with diameters come and depth of defect data should be consistent, when the size data of hole defect is unified, thus convenient
Data validation is carried out when carrying out Ultrasonic NDT to pipeline fusion splice, saves the time.
In other embodiments, the depth >=15mm in hole 20 is simulated；Alternatively, the depth in simulation hole 20 is greater than backfill amount L, it is small
In simulation the sum of hole aperture and backfill amount L；Or the depth in simulation hole 20 is greater than the sum of aperture and the backfill amount L in simulation hole 20.
Specifically, several simulation holes are circumferentially equally distributed on the end face of the simulation pipeline.In this way, when adopting
As soon as the position of other hole defects can be extrapolated after detecting the hole defect in fusion splice with ultrasonic non-destructive inspection techniques
It sets, detects distributing position and size that staff does not know several simulation holes in advance certainly, just can ensure that ultrasonic nothing in this way
The accuracy for the data that damage detection technique detects.
Specifically, several simulation holes are in the cross end face for being distributed in simulation pipeline；Setting is to determine for convenience in this way
The position of hole defect is simulated, the time is saved；In other embodiments, several simulation holes are distributed in simulation pipeline in rice font
End face.
Preparation method provided in this embodiment is mainly used for the simulation connector that production has hole defect, is connect by simulation
Head carries out the accuracy of Inner Defect Testing to determine Ultrasonic NDT to fusion splice, and to confirm and examine implementation super
The operational capacity of sound non-destructive testing staff, it is quasi- so as to ensure detection accuracy when site operation HDPE pipe detection
Really reflection HDPE pipeline welding quality improves the safety of HDPE pipeline construction application.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (9)
1. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety, which comprises the following steps:
S1, test pipe is chosen, obtains backfill amount L of the test pipe after fusing at defect of pipeline；
S2, simulation pipeline is chosen, and marked on simulation pipeline for making several positions of simulation hole defect；
S3, to drilling at several positions of the simulation hole defect of label with obtain simulation hole, it is described simulation hole depth
Greater than the value of the backfill amount L；
S4, the mutual welding in one end that the two simulation pipelines are had to simulation hole, form the simulation connector with hole defect；Or
The one simulation pipeline is had one end and the normal pipeline welding in simulation hole by person, forms the simulation connector with hole defect.
2. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 1, feature exist
In: the S1 the following steps are included:
S11, test pipe is chosen, and bores the blind hole that several depth are L1 in an end face of the test pipe；
S12, one end that the test pipe is drilled with to blind hole and normal pipeline welding form test joint, or by two tests
The mutual welding in one end that pipeline is drilled with blind hole forms test joint；
S13, the test joint is cut, the remaining depth for measuring blind hole on the test pipe is L2；
The backfill amount L=L1-L2.
3. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 2, feature exist
In: the L1 >=15mm.
4. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 3, feature exist
In: before carrying out S11 step, confirm the end face of the test pipe and the axis perpendicular of the test pipe.
5. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 4, feature exist
In: the depth in the simulation hole is equal to the sum of the aperture for simulating hole and described backfill amount L.
6. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 4, feature exist
In: the depth >=15mm in the simulation hole.
7. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 5, feature exist
In: several simulation holes are circumferentially equally distributed on the end face of the simulation pipeline.
8. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 7, feature exist
In: several simulation holes are in the cross end face for being distributed in the simulation pipeline.
9. a kind of preparation method of 3 grades of HDPE pipeline A hole defects of nuclear safety according to claim 7, feature exist
In: several simulation holes are distributed in the end face for simulating pipeline in rice font.
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| CN201811087095.XA CN109100428B (en) | 2018-09-18 | 2018-09-18 | Preparation method for simulating hole defects of nuclear safety 3-level HDPE (high-density polyethylene) pipeline |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811087095.XA CN109100428B (en) | 2018-09-18 | 2018-09-18 | Preparation method for simulating hole defects of nuclear safety 3-level HDPE (high-density polyethylene) pipeline |
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| CN109100428B CN109100428B (en) | 2021-03-02 |
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Cited By (7)
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| CN112113718A (en) * | 2020-07-28 | 2020-12-22 | 中国核电工程有限公司 | Method for detecting sealing performance of nuclear power plant hole plugging by using ultrasonic method |
| CN112880924A (en) * | 2021-01-12 | 2021-06-01 | 同济大学 | Leakage point simulation system for water supply pipeline |
| CN113125229A (en) * | 2021-04-27 | 2021-07-16 | 中国石油天然气集团有限公司 | Method for manufacturing defect simulation test block of polyethylene pipe hot-melt welding joint |
| CN113125228A (en) * | 2021-04-27 | 2021-07-16 | 中国石油天然气集团有限公司 | Method for manufacturing polyethylene pipe electric fusion welding joint defect nondestructive testing simulation test block |
| CN113155571A (en) * | 2021-04-27 | 2021-07-23 | 中国石油天然气集团有限公司 | Method for manufacturing non-metal pipeline body defect nondestructive testing simulation test block |
| CN113777269A (en) * | 2021-08-05 | 2021-12-10 | 上海核工程研究设计院有限公司 | Preparation method of nuclear safety 3-level HDPE nondestructive testing test block |
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| CN113125229A (en) * | 2021-04-27 | 2021-07-16 | 中国石油天然气集团有限公司 | Method for manufacturing defect simulation test block of polyethylene pipe hot-melt welding joint |
| CN113125228A (en) * | 2021-04-27 | 2021-07-16 | 中国石油天然气集团有限公司 | Method for manufacturing polyethylene pipe electric fusion welding joint defect nondestructive testing simulation test block |
| CN113155571A (en) * | 2021-04-27 | 2021-07-23 | 中国石油天然气集团有限公司 | Method for manufacturing non-metal pipeline body defect nondestructive testing simulation test block |
| CN113155571B (en) * | 2021-04-27 | 2023-01-24 | 中国石油天然气集团有限公司 | Method for manufacturing non-metal pipeline body defect nondestructive testing simulation test block |
| CN113777269A (en) * | 2021-08-05 | 2021-12-10 | 上海核工程研究设计院有限公司 | Preparation method of nuclear safety 3-level HDPE nondestructive testing test block |
| CN115656445A (en) * | 2022-11-11 | 2023-01-31 | 江苏省特种设备安全监督检验研究院 | Test method for detecting typical defects of directly-buried jacket steam pipeline |
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