CN102650356A - Steel pipe collar joint coating method - Google Patents
Steel pipe collar joint coating method Download PDFInfo
- Publication number
- CN102650356A CN102650356A CN2011100479258A CN201110047925A CN102650356A CN 102650356 A CN102650356 A CN 102650356A CN 2011100479258 A CN2011100479258 A CN 2011100479258A CN 201110047925 A CN201110047925 A CN 201110047925A CN 102650356 A CN102650356 A CN 102650356A
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- CN
- China
- Prior art keywords
- steel pipe
- pipeline
- box cupling
- groove
- high temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
- Pipe Accessories (AREA)
Abstract
The invention discloses a steel pipe collar joint coating method which is characterized in that when a pipeline is mounted after corrosion protection is conducted on the inner wall of the pipeline, high temperature of electric welding can damage a corrosion resistant coating, so as to damage the corrosion protection effect. The method has the following steps: checking the pipeline before corrosion protection; beveling; mounting collars at two ends outside the pipeline; conducting corrosion protection on the interior of the pipeline; and mounting a rubber ring in a collar at one end after corrosion protection. An insertion method is adopted during pipeline mounting, the rubber ring in the collar seals the pipeline due to the extrusion of the bevel of the pipeline during pipeline connection; the pipeline is connected by welding the butted openings of two collars; and as the collars can isolate high temperature generated by electric welding, the corrosion resistant coating of the pipeline cannot be damaged due to high temperature, which achieves the corrosion resistant purpose.
Description
One, technical field
The present invention solves the anticorrosion back of inner wall of steel pipe high temperature to inwall mouth of pipe anticorrosive coat when welded and installed and destroys problem.
Two, technical background
The method that present inner wall of steel pipe anti-corrosion pipe adopts arc welding directly to weld when connection mostly is because the high temperature that arc welding produces in welding process has destroyed the anticorrosive coat on weld seam both sides.Thereby caused the decline of pipe joint place undercoating anti-corrosion capability, often corrosion failure occurred at the pipe welding seam place at first.
Three, summary of the invention
The objective of the invention is to solve the destruction problem of anti-pipeline line up inner wall anti-corrosive layer when welding in the steel.In order to prevent high temperature that electric welding produces destruction, at first box cupling is installed, and then is carried out anticorrosion and the cushion rubber installation of inner-walls of duct at the outer wall tube end position of pipeline to the pipeline internal corrosion layer.Directly weld hoop when piping erection connects and reach the pipeline purpose of connecting, because pipeline directly is not heated, the high temperature that electric welding produces weakens when being transmitted to anticorrosive coat greatly, thereby can not damage the pipeline internal corrosion layer.Cushion rubber in the pipe collar because the groove of pipeline forms extruding to it, has been realized the airtight of pipeline when pipeline connects, the medium in the pipeline can not flow to jointing outward, thereby has avoided the corrosion of medium docking port.
Four, description of drawings
Fig. 1 is a steel pipe overcoat box cupling repaired mouth sectional drawing
1 steel pipe, 2 box cupling I, 3 box cupling II, 4 O-ring seals, 5 box cupling weld seams, 6 box cuplings and pipeline attachment weld among the figure
Five, embodiment
Every (1) steel pipe two ends are proofreaied and correct beat groove → arrive outer wall of steel pipe to box cupling through welded and installed; Steel pipe one end is installed (2) box cupling I one end (3) box cupling II is installed, must guarantee in the groove that box cupling and steel pipe are the same center of circle → inner-walls of duct and groove anticorrosion construction → installation (4) O-ring seal in (2) box cupling I → when piping erection, directly will be equipped with in steel pipe insertion (2) box cupling I of (3) box cupling II one end → level exerts pressure and reaches welding requirements gap → electric welding relatively to the pipe collar groove and be connected (2) box cupling I and (3) box cupling II.
Claims (2)
1. steel pipe overcoat box cupling repaired mouth method, it is to be made up of steel pipe, box cupling, O-ring seal.In shape, structure and combination thereof at current no similar technique.Patent of the present invention is for anti-steel pipe in preventing a kind of method that electric welding high temperature when connecting destroys the pipeline internal corrosion layer to be installed.Be to utilize steel pipe overcoat box cupling and interior dress O-ring seal to realize the pipe joint technology of seal for pipe joints and the interior anticorrosive coat of protection pipeline.
2. the characteristic of the described steel pipe overcoat of root a tree name claim 1 box cupling repaired mouth method is: at first beat groove at the steel pipe two ends; It is fixing that box cupling is enclosed within steel pipe outside two ends welding; Carry out in the pipeline and groove anticorrosion, O-ring seal is positioned in the groove of box cupling and intersects with the steel pipe groove, steel pipe is steel pipe groove crush seal cushion rubber when counterpart is installed; The sealing of steel pipe mouth, steel pipe mouth sealing box cupling counterpart simultaneously is welded to connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100479258A CN102650356A (en) | 2011-02-26 | 2011-02-26 | Steel pipe collar joint coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100479258A CN102650356A (en) | 2011-02-26 | 2011-02-26 | Steel pipe collar joint coating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102650356A true CN102650356A (en) | 2012-08-29 |
Family
ID=46692438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100479258A Pending CN102650356A (en) | 2011-02-26 | 2011-02-26 | Steel pipe collar joint coating method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102650356A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799650A (en) * | 2018-07-27 | 2018-11-13 | 北京中恒永信科技有限公司 | A kind of coated pipeline welding structure and its welding method |
| CN113828894A (en) * | 2021-10-20 | 2021-12-24 | 北京中恒永信科技有限公司 | Nondestructive welding process for repairing anticorrosive pipeline of ground internal coating |
-
2011
- 2011-02-26 CN CN2011100479258A patent/CN102650356A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799650A (en) * | 2018-07-27 | 2018-11-13 | 北京中恒永信科技有限公司 | A kind of coated pipeline welding structure and its welding method |
| CN113828894A (en) * | 2021-10-20 | 2021-12-24 | 北京中恒永信科技有限公司 | Nondestructive welding process for repairing anticorrosive pipeline of ground internal coating |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120829 |