CN208687135U - The connection structure of corrosion-proof pipe line - Google Patents
The connection structure of corrosion-proof pipe line Download PDFInfo
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- CN208687135U CN208687135U CN201821248138.3U CN201821248138U CN208687135U CN 208687135 U CN208687135 U CN 208687135U CN 201821248138 U CN201821248138 U CN 201821248138U CN 208687135 U CN208687135 U CN 208687135U
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Abstract
The utility model discloses a kind of connection structure of corrosion-proof pipe line, it is used to connect multistage steel pipe matrix to form pipeline.The connection structure of the corrosion-proof pipe line includes: the first connector, is tubular structure, and one end of first connector has extended radially outward the first flange；Second connector is tubular structure, and one end of second connector has extended radially outward the second flange；And carrier, it is tubular structure, one end sealing of the carrier is set in outside the first flange, and the other end is extending axially outward form bellmouth along the first flange, and the internal diameter of the bellmouth and the outer diameter of the second flange match.Wherein, the second flange is inserted in bellmouth, and the first connector forms sealing socket joint with the second connector and connect.Destruction of the utility model using sealing bayonet joint, when reducing connection to erosion resistant coating；It is connected using spigot-and-socket flange or spigot-and-socket union double containment, avoids the unreliability of traditional flange or union connection.
Description
Technical field
The utility model relates to corrosion-proof pipe line field, in particular to a kind of connection structure of corrosion-proof pipe line.
Background technique
In oilfield development process, ground feed-line causes conduit wiring piercing to leak because containing a large amount of corrosive mediums in grease
And environmental pollution mostly uses inner wall anti-corrosive layer to avoid internal corrosion.However, pipeline during the connection process inevitably internal erosion resistant coating
It damages.Current pipeline connection mostly uses two ways: one is main by the way of welding, and another kind is to avoid welding
Influence, mostly use flange or union connection type.
Wherein, the high temperature generated in welding process anti-corrosion damage layer internal first, when not only forming weak spot, while welding
Heat affected area easily forms the problems such as concentrating corrosion and electrochemistry accelerated corrosion in corrosive medium.Therefore, the welding of pipeline is pipe
One major issue of line corrosion-resistant；It is the principal element that coating antiseptic cannot be applied successfully.For the influence for avoiding welding, mostly use
Flange or union connection type protect erosion resistant coating, but in surface line, because of the reasons such as loosening or sedimentation of part soil,
Junction is easily caused to generate gap after pipeline is mobile, flange connects that there are risks with union.
So oil transportation corrosion-proof pipe line uses reasonable connection type, the effect and pipeline of erosion resistant coating will be directly determined
Service life.
The information disclosed in the background technology section is intended only to increase the understanding to the general background of the utility model, and
It is not construed as recognizing or implying in any form that information composition is already known to those of ordinary skill in the art existing
Technology.
Utility model content
One of the purpose of this utility model is to prevent corrosion-proof pipe line from, to the destruction of erosion resistant coating, guaranteeing corrosion-resistant company when connecting
Continuous property；The another object of the utility model is that the face-flange for solving surface line routine connects unreliability with union.
It is according to the present utility model in a first aspect, the utility model provides one to realize said one or multiple purposes
The connection structure of kind corrosion-proof pipe line, is used to connect multistage steel pipe matrix to form pipeline.The connection structure packet of the corrosion-proof pipe line
Include: the first connector is tubular structure, and one end of first connector has extended radially outward the first flange；Second connector,
For tubular structure, one end of second connector has extended radially outward the second flange；And carrier, it is tubular structure,
One end sealing of the carrier is set in outside the first flange, and the other end is extending axially outward form bellmouth along the first flange, should
The internal diameter of bellmouth and the outer diameter of the second flange match.Wherein, the second flange is inserted in bellmouth, the first connector and the second connector shape
At sealing socket joint connection.
Further, in above-mentioned technical proposal, screwed connection between the inner wall of bellmouth and the outer wall of the second flange.
Further, in above-mentioned technical proposal, the connection structure of corrosion-proof pipe line further include: first flange is connected to first
It is mutually sealed against on connector with the first flange；And second flange, be connected on the second connector with the second flange mutually seal to
It connects.Wherein, first flange is bolted connection with second flange, to be formed between the first connector and the second connector close
Envelope.
Further, in above-mentioned technical proposal, first flange is structure as a whole with carrier.
Further, in above-mentioned technical proposal, sealing ring is equipped between carrier and the first flange and the second flange.
Further, in above-mentioned technical proposal, the end of the connection structure of the end and/or corrosion-proof pipe line of steel pipe matrix has
Groove, the connection structure of corrosion-proof pipe line and the end of steel pipe matrix are welded to connect.
Further, in above-mentioned technical proposal, the sealing surface between the first connector, the second connector and carrier is equipped with anti-corrosion
Layer.
Further, in above-mentioned technical proposal, the outer wall of the connection structure of corrosion-proof pipe line is equipped with external anti-corrosion layer.
Further, in above-mentioned technical proposal, external anti-corrosion layer is glass silk floss.
Further, in above-mentioned technical proposal, the inner wall of the connection structure of corrosion-proof pipe line is equipped with interior erosion resistant coating.
Compared with prior art, the utility model has the following beneficial effects:
1. destruction of the connection structure of corrosion-proof pipe line using sealing bayonet joint, when reducing connection to erosion resistant coating.
2. connected using spigot-and-socket flange or spigot-and-socket union double containment, avoid traditional flange or union connection can not
By property.
3. each sealing surface is equipped with erosion resistant coating, outer wall is equipped with the design such as external anti-corrosion layer, the connection of corrosion-proof pipe line can be reduced
The corrosion and abrasion of structure, prolong its service life.
4. the connection structure of the corrosion-proof pipe line of the utility model and connection method are suitable for different anticorrosion process, such as coating
Anticorrosion process, liner composite anti-corrosive technique, electroplating anticorrosion technique etc., the scope of application is wider.
Above description is only the general introduction of technical solutions of the utility model, in order to more clearly understand the utility model
Technological means can be simultaneously practiced according to the content of specification, while above and other purpose, skill in order to make the utility model
Art feature and advantage are more understandable, are exemplified below one or more preferred embodiments, and be described in detail with the accompanying drawings as follows.
Detailed description of the invention
Fig. 1 is the schematic cross-sectional view of the connection structure of the corrosion-proof pipe line of an embodiment according to the present utility model.
Fig. 2 is the schematic cross-sectional view of the connection structure of the corrosion-proof pipe line of another embodiment according to the present utility model.
Main appended drawing reference explanation:
The connection structure of 10- corrosion-proof pipe line, the first connector of 11-, the first flange of 111-, 112- first flange, 12- second connect
Head, the second flange of 121-, 122- second flange, 13- carrier, 14- bolt, 15- sealing ring, erosion resistant coating in 16-, 17- first
Groove, the second groove of 18-, 31- steel pipe matrix；
The connection structure of 20- corrosion-proof pipe line, the first connector of 21-, the first flange of 211-, the second connector of 22-, 221- second are convex
Edge, 23- carrier, 24- screwed connection, erosion resistant coating in 26-, the first groove of 27-, the second groove of 28-, 32- steel pipe matrix.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in detail, it is to be understood that this is practical
Novel protection scope is not limited by the specific implementation.
Explicitly indicate that, otherwise in entire disclosure and claims, term " includes " or its change unless otherwise other
Changing such as "comprising" or " including " etc. will be understood to comprise stated element or component, and not exclude other yuan
Part or other components.
Herein, for convenience of description, spatially relative term can be used, such as " following ", " lower section ", "lower",
" above ", " top ", "upper" etc., to describe an elements or features and the relationship of another elements or features in the accompanying drawings.Ying Li
Solution, spatially relative term are intended to comprising the not Tongfang of object in use or operation other than direction painted in figure
To.For example, the element for being described as be in other elements or feature " lower section " or "lower" will if the object in figure is reversed
Orientation is in " top " of elements or features.Therefore, exemplary term " lower section " may include following above and both direction.Object
There can also be other orientations (be rotated by 90 ° or other are orientated) and reply spatially relative term used herein makes corresponding solution
It releases.
Herein, term " first ", " second " etc. be distinguishing two different elements or position, be not to
Limit specific position or relativeness.In other words, in some embodiments, term " first ", " second " etc. can also be each other
It exchanges.
The connection structure of the corrosion-proof pipe line of the utility model is socket type connecting structure, can connect multistage steel pipe matrix
It connects to form pipeline.Specifically, for the pipeline of DN100 or more, using spigot-and-socket flanged joint (as shown in Figure 1)；For DN100
Pipeline below connects (as shown in Figure 2) using spigot-and-socket union.
As shown in Figure 1, one or more illustrative embodiments according to the present utility model, the connection structure of corrosion-proof pipe line
10 include the first connector 11, the second connector 12 and carrier 13.First connector 11 is tubular structure, and one end is radially prolonged
Stretching has the first flange 111, and the other end of the first connector 11 is welded on the end of steel pipe matrix 31.It is preferred that and not restrictive, the
Groove is offered at the position that one connector 11 is welded to each other with steel pipe matrix 31.It is to be understood that embodiment shown in Fig. 1
In, the first groove 17 is provided with the end of steel pipe matrix 31 and the end of the first connector 11, but the utility model is not with this
It is limited.Those skilled in the art can select type and the position of groove according to actual needs, and groove can be Y type groove, V-type
Groove or U-shaped groove, groove can be provided with the end of steel pipe matrix 31 and/or the end of the first connector 11.Second connector 12
For tubular structure, one end has extended radially outward the second flange 121, and the other end of the second connector 12 is welded on steel pipe matrix
End.It is preferred that and not restrictive, offering groove at the position that the second connector 12 is welded to each other with steel pipe matrix 31.Ying Liao
Solution, in the embodiment shown in figure 1, the second groove 18 is provided with the end of steel pipe matrix 31 and the end of the second connector 12
Portion, but the utility model is not limited thereto.Those skilled in the art can select according to actual needs groove type and
Position, groove can be Y type groove, double V-groove or U-shaped groove, and groove can be provided with the end and/or the of steel pipe matrix 31
The end of two connectors 12.Carrier 13 is tubular structure, and one end sealing is set in outside the first flange 111.Carrier 13 it is another
One end extends axially outwardly out the bellmouth that the first flange 111 forms bayonet joint, the internal diameter of the bellmouth and the second flange 121
Outer diameter match, the second flange 121 is inserted into bellmouth as the socket of bayonet joint, so that the first connector 11 and
Two connectors 12 form sealing socket joint connection.
Further, in one or more illustrative embodiments of the utility model, the connection structure of corrosion-proof pipe line
10 be spigot-and-socket flanged joint.The connection structure 10 of corrosion-proof pipe line includes 112 He of first flange being connected on the first connector 11
The second flange 122 being connected on the second connector 12.It is sealed against between first flange 112 and the first flange 111, second flange
122 and second seal against between flange 121.It is fastenedly connected between first flange 112 and second flange 122 by bolt 14,
To which the first connector 11 and the second connector 12 are compressed sealing.It is preferred that and not restrictive, bolt 14 is high-strength bolt.It is preferred that and
Without limitation, first flange 112 is structure as a whole with carrier 13, and such integral structure sealing effect is more preferable, and makes
Make with it is more convenient to use.It is further preferred that between carrier 13 and the first flange 111 and carrier 13 and the second flange
It is equipped with multiple sealing rings 15 between 121, improves sealing effect.Preferably, steel pipe matrix 31 is the steel pipe of DN100 or more.
It is preferred that and not restrictive, the sealing surface between the first connector 11 and the second connector 12 is equipped with erosion resistant coating (in figure not
Show), illustratively, which can be electroplating anticorrosion layer, such as tungsten alloy coating, the utility model not as
Limit.It is preferred that and not restrictive, the sealing surface between carrier 13 and the first connector 11 and the second connector 12 is equipped with erosion resistant coating (figure
In be not shown), illustratively, which can be electroplating anticorrosion layer, for example, tungsten alloy coating, the utility model not with
This is limited.The erosion resistant coating of sealing surface can prevent the corrosion, wear for the structure being tightly connected, to improve the structure of sealed connection
Service life.
Further, in one or more illustrative embodiments of the utility model, the connection structure of corrosion-proof pipe line
10 outer wall has external anti-corrosion layer (not shown).It is formed when steel pipe matrix 31 is connected by the connection structure 10 of corrosion-proof pipe line
After pipeline, external anti-corrosion is carried out to the connection structure 10 of corrosion-proof pipe line and forms external anti-corrosion layer.Illustratively, which can be with
Using glass silk floss, the utility model is not limited thereto.
It is preferred that and not restrictive, the inner wall of the connection structure of the corrosion-proof pipe line of the utility model is equipped with interior erosion resistant coating 16.
After the first connector 11 and the second connector 12 are respectively welded at the end of steel pipe matrix 31, inner wall progress preservative treatment is formed interior
Erosion resistant coating 16.Illustratively, liner composite anti-corrosive, coating antiseptic or electroplating anticorrosion can be used to be formed in interior erosion resistant coating 16, this reality
It is not limited thereto with novel.
As shown in Fig. 2, one or more illustrative embodiments according to the present utility model, the connection structure of corrosion-proof pipe line
20 include the first connector 21, the second connector 22 and carrier 23.First connector 21 is tubular structure, and one end is radially prolonged
Stretching has the first flange 211, and the other end of the first connector 21 is welded on the end of steel pipe matrix 32.It is preferred that and not restrictive, the
Groove is offered at the position that one connector 21 is welded to each other with steel pipe matrix 32.It is to be understood that embodiment shown in Fig. 2
In, the first groove 27 is provided with the end of steel pipe matrix 32 and the end of the first connector 21, but the utility model is not with this
It is limited.Those skilled in the art can select type and the position of groove according to actual needs, and groove can be Y type groove, V-type
Groove or U-shaped groove, groove can be provided with the end of steel pipe matrix 32 and/or the end of the first connector 21.Second connector 22
For tubular structure, one end has extended radially outward the second flange 221, and the other end of the second connector 22 is welded on steel pipe matrix
32 end.It is preferred that and not restrictive, offering groove at the position that the second connector 22 is welded to each other with steel pipe matrix 32.It answers
It is appreciated that, in the embodiment shown in figure 2, the second groove 28 is provided with end and second connector 22 of steel pipe matrix 32
End, but the utility model is not limited thereto.Those skilled in the art can select the type of groove according to actual needs
And position, groove can be Y type groove, double V-groove or U-shaped groove, groove can be provided with steel pipe matrix 32 end and/or
The end of second connector 22.Carrier 23 is tubular structure, and one end sealing is set in outside the first flange 211.Carrier 23
The other end extends axially outwardly out the bellmouth that the first flange 211 forms bayonet joint, the internal diameter of the bellmouth and the second flange
221 outer diameter matches, and the second flange 221 is inserted into bellmouth as the socket of bayonet joint, so that the first connector 21
Sealing socket joint is formed with the second connector 22 to connect.
Further, in one or more illustrative embodiments of the utility model, the connection structure of corrosion-proof pipe line
20 connect for spigot-and-socket union.Specifically, have between the inner wall of bellmouth and the outer wall of the second flange 221 that carrier 23 is formed
Screwed connection 24, so that 22 fit sealing of the first connector 21 and the second connector is completed the connection of spigot-and-socket union.Further preferably
Ground is equipped with one or more sealing ring (not shown)s, improves sealing effect between carrier 23 and the first flange 211.It is excellent
Selection of land, steel pipe matrix 32 are DN100 steel pipe below.
It is preferred that and not restrictive, the sealing surface between the first connector 21 and the second connector 22 is equipped with erosion resistant coating (in figure not
Show), illustratively, which can be electroplating anticorrosion layer, such as tungsten alloy coating, the utility model not as
Limit.It is preferred that and not restrictive, the sealing surface between carrier 23 and the first connector 21 and the second connector 22 is equipped with erosion resistant coating (figure
In be not shown), illustratively, which can be electroplating anticorrosion layer, for example, tungsten alloy coating, the utility model not with
This is limited.The erosion resistant coating of sealing surface can prevent the corrosion, wear for the structure being tightly connected, to improve the structure of sealed connection
Service life.
Further, in one or more illustrative embodiments of the utility model, the connection structure of corrosion-proof pipe line
20 outer wall has external anti-corrosion layer (not shown).It is formed when steel pipe matrix 32 is connected by the connection structure 20 of corrosion-proof pipe line
After pipeline, external anti-corrosion is carried out to the connection structure 20 of corrosion-proof pipe line and forms external anti-corrosion layer.Illustratively, which can be with
Using glass silk floss, the utility model is not limited thereto.
It is preferred that and not restrictive, the inner wall of the connection structure 20 of the corrosion-proof pipe line of the utility model is equipped with interior erosion resistant coating
26.After the first connector 21 and the second connector 22 are respectively welded at the end of steel pipe matrix 32, preservative treatment shape is carried out to inner wall
At interior erosion resistant coating 26.Illustratively, liner composite anti-corrosive, coating antiseptic or electroplating anticorrosion can be used to be formed in interior erosion resistant coating 26,
The utility model is not limited thereto.
The connection method of the corrosion-proof pipe line of the utility model mainly includes operating as follows:
The connection structure of corrosion-proof pipe line is processed, which is sealing bayonet joint.Wherein, for DN100 or more
Pipeline, using spigot-and-socket flanged joint；Pipeline below for DN100 is connected using spigot-and-socket union.To guarantee when processing
The precision and smoothness of each sealing surface, and to each sealing surface carry out preservative treatment, illustratively, to each sealing surface into
The processing of row electroplating anticorrosion, is electroplated for example, by using tungsten alloy.
The connection structure of corrosion-proof pipe line is welded on to the end of steel pipe matrix.It is preferred that and not restrictive, before welding,
It further include the operation of finished edge.The position of groove includes the end of each section of steel pipe matrix and/or the connection structure of corrosion-proof pipe line
End.Illustratively, welding operation is completed using automatic welding device, to guarantee weld bond quality.
Interior preservative treatment is carried out to the connection structure of steel pipe matrix and corrosion-proof pipe line.It is preferred that and not restrictive, interior anti-corrosion
It further include inner wall derusting operation before processing.Interior preservative treatment can be according to actual condition, using liner composite anti-corrosive, coating
The techniques such as anti-corrosion or electroplating anticorrosion.It is noted that erosion resistant coating at weld bond must continuous binding force it is good.Interior preservative treatment is complete
Cheng Hou carries out outer anti-corrosion, heat preservation and packaging operation as needed.The protection to sealing surface is paid attention to when packaging.
It connects multistage steel pipe matrix to form pipeline by the connection structure of corrosion-proof pipe line.To ensure main ground when connection
The sealing of planarization and joint face.
After the completion of connection, pressure testing inspection is carried out to pipeline.After pressure testing is upchecked, the connection structure of corrosion-proof pipe line is carried out
Outer preservative treatment illustratively can be using glass silk floss as external anti-corrosion layer.
The connection structure and connection method of the corrosion-proof pipe line of the utility model are connected using spigot-and-socket flange/union, so that
The erosion resistant coating of pipeline can be protected well, and entire process flow is perfect, efficiency of the practice is high.In addition, the utility model
The connection structure of corrosion-proof pipe line and connection method are suitable for different anticorrosion process, such as coating antiseptic technique, liner composite anti-corrosive
Technique, electroplating anticorrosion technique etc. can carry out erosion resistant coating and connection structure, the group of Joining Technology for different corrosive mediums
It closes.Mainly solves the problems such as perishable leakage of the oil field ground feed-line, service life is short, maintenance is difficult.
The description of the aforementioned specific exemplary embodiment to the utility model is in order to illustrate and illustration purpose.These
Description is not wishing to for the utility model to be limited to disclosed precise forms, and it will be apparent that according to the above instruction, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining the specific principle of the utility model
And its practical application, so that those skilled in the art can be realized and utilize a variety of different examples of the utility model
Property embodiment and various chooses and changes.For above-mentioned example embodiment made it is any it is simple modification,
Equivalent variations and modification, should all fall into the protection scope of the utility model.
Claims (10)
1. a kind of connection structure of corrosion-proof pipe line is used to connect multistage steel pipe matrix to form pipeline, which is characterized in that this is anti-
The connection structure of rotten pipeline includes:
First connector is tubular structure, and one end of first connector has extended radially outward the first flange；
Second connector is tubular structure, and one end of second connector has extended radially outward the second flange；And
Carrier, is tubular structure, and one end sealing of the carrier is set in outside first flange, and the other end is along described the
One flange is extending axially outward form bellmouth, and the internal diameter of the bellmouth and the outer diameter of second flange match,
Wherein, second flange is inserted in the bellmouth, and first connector and second connector form sealing socket joint and connect
It connects.
2. the connection structure of corrosion-proof pipe line according to claim 1, which is characterized in that the inner wall of the bellmouth and described the
Screwed connection between the outer wall of two flanges.
3. the connection structure of corrosion-proof pipe line according to claim 1, which is characterized in that the connection structure of the corrosion-proof pipe line
Further include:
First flange is connected on first connector and mutually seals against with first flange；And
Second flange is connected on second connector and mutually seals against with second flange,
Wherein, the first flange is bolted connection with the second flange, thus first connector with it is described
Sealing is formed between second connector.
4. the connection structure of corrosion-proof pipe line according to claim 3, which is characterized in that the first flange and the undertaking
Portion is structure as a whole.
5. the connection structure of corrosion-proof pipe line according to claim 4, which is characterized in that the carrier and described first convex
Sealing ring is equipped between edge and second flange.
6. the connection structure of corrosion-proof pipe line according to claim 1, which is characterized in that the end of the steel pipe matrix and/
Or the end of the connection structure of the corrosion-proof pipe line has groove, the connection structure of the corrosion-proof pipe line and the steel pipe matrix
End is welded to connect.
7. the connection structure of corrosion-proof pipe line according to claim 1, which is characterized in that first connector, described second
Sealing surface between connector and the carrier is equipped with erosion resistant coating.
8. the connection structure of corrosion-proof pipe line according to claim 1, which is characterized in that the connection structure of the corrosion-proof pipe line
Outer wall be equipped with external anti-corrosion layer.
9. the connection structure of corrosion-proof pipe line according to claim 8, which is characterized in that the external anti-corrosion layer is glass fiber
It is continuous.
10. the connection structure of corrosion-proof pipe line according to claim 1, which is characterized in that the connection knot of the corrosion-proof pipe line
The inner wall of structure is equipped with interior erosion resistant coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821248138.3U CN208687135U (en) | 2018-08-03 | 2018-08-03 | The connection structure of corrosion-proof pipe line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821248138.3U CN208687135U (en) | 2018-08-03 | 2018-08-03 | The connection structure of corrosion-proof pipe line |
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| Publication Number | Publication Date |
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| CN208687135U true CN208687135U (en) | 2019-04-02 |
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ID=65883593
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730641A (en) * | 2018-08-03 | 2018-11-02 | 克拉玛依双信防腐技术有限公司 | The connection structure of corrosion-proof pipe line and connection method |
-
2018
- 2018-08-03 CN CN201821248138.3U patent/CN208687135U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730641A (en) * | 2018-08-03 | 2018-11-02 | 克拉玛依双信防腐技术有限公司 | The connection structure of corrosion-proof pipe line and connection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Jianchun Inventor after: Tang Bin Inventor after: Mao Tiancong Inventor after: Luo Xin Inventor after: Zhang Xue Inventor after: Liu Dalu Inventor after: Zhang Tao Inventor before: Wang Jianchun Inventor before: Tang Bing Inventor before: Mao Tiancong Inventor before: Luo Xin Inventor before: Zhang Xue Inventor before: Liu Dalu Inventor before: Zhang Tao |
|
| CB03 | Change of inventor or designer information | ||
| CP03 | Change of name, title or address |
Address after: 806 Pingnan 1st Road, Baijiantan District, Karamay, Xinjiang Uygur Autonomous Region Patentee after: Xinjiang Defeng Yisheng petroleum Anticorrosion Engineering Co., Ltd Address before: No.2, Nanxin Road, Karamay, Xinjiang Uygur Autonomous Region Patentee before: KARAMAY SHUANGXIN ANTI-CORROSION TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address |