CN202349420U - Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials - Google Patents
Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials Download PDFInfo
- Publication number
- CN202349420U CN202349420U CN2011204275132U CN201120427513U CN202349420U CN 202349420 U CN202349420 U CN 202349420U CN 2011204275132 U CN2011204275132 U CN 2011204275132U CN 201120427513 U CN201120427513 U CN 201120427513U CN 202349420 U CN202349420 U CN 202349420U
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- pipeline
- corrosion
- welding
- resisting
- pipe fitting
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- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
Disclosed is a corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials. A pipe fitting or a pipeline made of one material is welded with a pipe fitting or a pipeline another material, a circle of circular weld seam is formed at the weld, and corrosion-resisting paint is painted on the outer surface of the circular weld seam in the pipe fitting or the pipeline and forms a corrosion resisting coating. According to the corrosion-resisting pipeline joint formed by the welding of the steel pipes made of the different materials, the problem that the potential difference forms by medium conveying caused by material differences of welding joints of the pipelines and results in the acceleration of the corrosion is solved, the corrosion-resisting property of the welding joints of the pipelines made of different materials is remarkably improved, the service life of the pipelines is prolonged. The corrosion-resisting pipeline joint has great value in use, and can be popularized in fields of petroleum, chemical industry and the like.
Description
Technical field
The utility model belongs to the connection technique field of pipeline, specially refers to the parts that xenogenesis material pipeline welding connection place prevents electrochemical corrosion.
Background technique
In the connecting of pipeline and pipeline, in the connecting of pipe fitting and pipeline, xenogenesis material pipeline and xenogenesis material pipeline, xenogenesis material pipeline connect with xenogenesis material pipe fitting use comparatively general; But because institute's connecting pipe material is different, when conveying had corrosive medium, point of attachment can be accelerated because of electrochemical corrosion makes corrosion rate; Corrosive pipeline speeds up, and directly has influence on pipeline working life, has influence on production; Particularly carry the pipeline of corrosion liquid corrosion protection gases such as acid, alkali, pipeline crack and perforation often occur, cause that soda acid leaks; Polluted environment, had influence on the healthy of worker, when pipeline is changed in maintenance; Need to stop production, have influence on the production unit economic benefit.Therefore for the special processing of xenogenesis material pipeline point of attachment, guarantee that the corrosion resisting property of this position is constant, seem very important for the use of whole pipe.
Current petrochemical enterprise, in the conveying of corrosion liquid, etchant gas, a technical problem that presses for solution is the corrosion-resistant problem that how to improve after the unlike material pipeline welding.
Summary of the invention
The utility model problem to be solved is that the connection for the different materials pipeline provides the xenogenesis material steel pipe welding anticorrosion pipeline joint of a kind of reasonable in design, simple in structure, corrosion resistance and good, long service life.
Solving the problems of the technologies described above the technological scheme that is adopted is: a kind of pipe fitting of material or pipeline connect with the pipeline welding of another kind of material; Weld forms a circle circumferential weld, and the outer surface of circumferential weld is coated with and is brushed with the anti-corrosion coating that anticorrosive coating constitutes in pipe fitting or pipeline.
The length of the anti-corrosion coating of the utility model is at least 40mm.
The pipe fitting of a kind of material of the utility model or the external diameter of pipeline are 40～1500mm.
The utility model is employed in two kinds of pipe fittings of two kinds of unlike materials or outer surface brushing anticorrosive coating that pipeline welding place forms a circle circumferential weld constitutes anti-corrosion coating; Solved pipeline welding point of attachment potential difference because of the fed sheet of a media that the causes formation of the different institute of material; The technical problem that rate of corrosion is accelerated has improved the corrosion resisting property of xenogenesis material pipeline point of attachment significantly, has prolonged the working life of pipeline; Have tangible use value, can promote the use of in fields such as oil, chemical industry.
Description of drawings
Fig. 1 is the utility model embodiment 1 a structural representation.
Fig. 2 is the utility model embodiment 2 a structural representation.
Embodiment
To the utility model further explain, but the utility model is not limited to these embodiments below in conjunction with accompanying drawing and embodiment.
In Fig. 1, the xenogenesis material steel pipe of present embodiment welding anticorrosion pipeline joint is to be connected by tee pipe fitting 1, branch pipe(tube) 4, connection weld seam 2, anti-corrosion coating 3 to constitute.
In the present embodiment, the material of tee pipe fitting 1 is X70, also can select the tee pipe fitting 1 of other grade for use, and tee pipe fitting 1 is a kind of pipe fitting of material, and the diameter of the horizontal pipe of tee pipe fitting 1 is 40mm, and the diameter of vertical tube is 40mm.The material of branch pipe(tube) 4 is the 316L stainless steel, also can select 304,316 stainless steels for use, also can select corrosion resistant alloy pipelines such as 2205 two phase stainless steels, 825 nickel-base alloy stainless steels, titanium material for use.30 ° groove is processed in upper end at tee pipe fitting 1 vertical section; 30 ° groove is processed in the lower end of branch pipe(tube) 4; Adopt the method for welding that the upper end of tee pipe fitting 1 and the lower end welding of branch pipe(tube) 4 are connected as one; Form weld seam 2; The lower end connects on the weld seam 2 the brushing anticorrosive coating and constitutes anti-corrosion coating 3 in upper end and the branch pipe(tube) 4 in tee pipe fitting 1, and the length of anti-corrosion coating 3 is 40mm, and anti-corrosion coating 3 is used to prevent that medium while in connection weld seam 2 scopes from contacting the formation potential difference and electrochemical corrosion occurring with two kinds of different metal materials.
Embodiment 2
Fig. 2 is the utility model embodiment 2 a structural representation.In Fig. 2; To be the method that adopts welding of the straight pipeline 4 by a kind of straight pipeline 1 of material and another kind of material with the pipeline 4 of a kind of pipeline 1 of material and another kind of material combine as a whole the xenogenesis material steel pipe of present embodiment welding anticorrosion pipeline constitutes; Form a circle overlay cladding for connecting weld seam 2; A kind of material of straight pipeline 1 of material is X70; The material of the straight pipeline 4 of another kind of material is the 316L stainless steel, also can select 304,316 stainless steels for use, also can select corrosion resistant alloy pipelines such as 2205 two phase stainless steels, 825 nickel-base alloy stainless steels, titanium material for use.A kind of straight pipeline 1 of material is 800mm with the diameter of the straight pipeline 4 of another kind of material, brushing anticorrosive coating formation anti-corrosion coating 3 on the connection weld seam 2 in the straight pipeline 4 of a kind of straight pipeline 1 of material and another kind of material, and the length of anti-corrosion coating 3 is 60mm.During welding,, can't carry out the brushing anticorrosive coating because pipeline is longer; The straight pipeline 4 of another kind of material is clipped left side straight pipeline 6; Behind the brushing anticorrosive coating, the left side straight pipeline 6 with identical material combines as a whole with straight pipeline 4 welding again, forms a circle circumferential weld 5.
In Fig. 2; To be the method that adopts welding of the straight pipeline 4 by a kind of straight pipeline 1 of material and another kind of material with the pipeline 4 of a kind of pipeline 1 of material and another kind of material combine as a whole the xenogenesis material steel pipe of present embodiment welding anticorrosion pipeline constitutes; Form a circle overlay cladding for connecting weld seam 2; A kind of material of straight pipeline 1 of material is X70; The material of the straight pipeline 4 of another kind of material is the 316L stainless steel, also can select 304,316 stainless steels for use, also can select corrosion resistant alloy pipelines such as 2205 two phase stainless steels, 825 nickel-base alloy stainless steels, titanium material for use.A kind of straight pipeline 1 of material is 1500mm with the diameter of the straight pipeline 4 of another kind of material; Brushing anticorrosive coating formation anti-corrosion coating 3 on the connection weld seam 2 in the straight pipeline 4 of a kind of straight pipeline of material 1 and another kind of material, the length of anti-corrosion coating 3 is 100mm.The straight pipeline 4 of another kind of material is clipped left side straight pipeline 6, and behind the brushing anticorrosive coating, the left side straight pipeline 6 with identical material combines as a whole identical with embodiment 2 with straight pipeline 4 welding again.
Claims (3)
1. an xenogenesis material steel pipe welds the anticorrosion pipeline joint; It is characterized in that: a kind of pipe fitting of material or pipeline connect with pipeline (4) welding of another kind of material; Weld forms a circle circumferential weld (2), and the outer surface of circumferential weld in pipe fitting or pipeline (2) is coated with and is brushed with the anti-corrosion coating (3) that anticorrosive coating constitutes.
2. according to the described xenogenesis material of claim 1 steel pipe welding anticorrosion pipeline joint, it is characterized in that: the length of described anti-corrosion coating (3) is at least 40mm.
3. according to the described xenogenesis material of claim 1 steel pipe welding anticorrosion pipeline joint, it is characterized in that: the pipe fitting of described a kind of material or the external diameter of pipeline are 40～1500mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204275132U CN202349420U (en) | 2011-11-01 | 2011-11-01 | Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204275132U CN202349420U (en) | 2011-11-01 | 2011-11-01 | Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202349420U true CN202349420U (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204275132U Expired - Lifetime CN202349420U (en) | 2011-11-01 | 2011-11-01 | Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202349420U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075047A (en) * | 2014-06-19 | 2014-10-01 | 中国海洋石油总公司 | Tungsten alloy plated pipeline welding port connecting method |
| CN109538849A (en) * | 2017-09-22 | 2019-03-29 | 昆山新莱洁净应用材料股份有限公司 | Heterogeneous welding structure for cavity pipe fitting |
| CN111022783A (en) * | 2019-12-19 | 2020-04-17 | 襄阳宏航实业有限责任公司 | Channel body and production process thereof |
-
2011
- 2011-11-01 CN CN2011204275132U patent/CN202349420U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104075047A (en) * | 2014-06-19 | 2014-10-01 | 中国海洋石油总公司 | Tungsten alloy plated pipeline welding port connecting method |
| CN109538849A (en) * | 2017-09-22 | 2019-03-29 | 昆山新莱洁净应用材料股份有限公司 | Heterogeneous welding structure for cavity pipe fitting |
| CN111022783A (en) * | 2019-12-19 | 2020-04-17 | 襄阳宏航实业有限责任公司 | Channel body and production process thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120725 |
|
| CX01 | Expiry of patent term |