CN203477637U - Bimetal composite pipe - Google Patents
Bimetal composite pipe Download PDFInfo
- Publication number
- CN203477637U CN203477637U CN201320569845.3U CN201320569845U CN203477637U CN 203477637 U CN203477637 U CN 203477637U CN 201320569845 U CN201320569845 U CN 201320569845U CN 203477637 U CN203477637 U CN 203477637U
- Authority
- CN
- China
- Prior art keywords
- joint
- outer tube
- connecting part
- pipe
- tube
- 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.)
- Expired - Lifetime
Links
Images
Landscapes
- Arc Welding In General (AREA)
Abstract
A bimetal composite pipe comprises an outer pipe, a connecting part and an inner pipe. One or two ends of the bimetal composite pipe are provided with the connecting part. The connecting part and the inner pipe are made of the same materials, the inner diameter of the connecting part is equal to that of the outer pipe, and the wall thickness of the connecting part is no less than that of the outer pipe. The outer pipe is connected with the connecting part in a welding mode. The inner pipe is tightly combined with the outer pipe and the connecting part at the same time through a certain forming method. The end portion of the inner pipe and the end portion of the connecting part are welded in a sealing mode so that corrosive media inside a pipeline cannot make contact with the outer pipe. Due to the fact that the dissimilar material welding between the connecting part and the outer pipe of the composite pipe is finished in a manufacturer, the welding condition is good, quality inspection is strictly and conveniently carried out, and the welding strength is guaranteed, only similar metal welding needs to be finished in site construction, and the requirements for connecting strength between pipelines are met. In addition, the connecting part is made of corrosion-resisting materials, the connecting part is prevented from being corroded, and the safety performance of conveying of the bimetal composite pipe is guaranteed.
Description
Technical field
The utility model belongs to petrochemical industry, particularly a kind of composite bimetal pipe.
Background technique
In recent years along with expanding economy, energy demand sharp increase, international, domestic all in the dynamics that strengthens recover petroleum, rock gas.Pipe-line has obtained developing rapidly apart from means of delivery as a kind of economy of oil and natural gas, length safely, uninterruptedly.In the Region of Oil-gas wells such as China Tarim Basin, Sichuan, long celebrating, contain H
2s, CO
2, Cl
-deng Korrosionsmedium, pipeline is had to extremely strong corrosivity, aggravation Pipeline damage, cause huge economic loss and environmental pollution, traditional tubing is not used in the Oil/gas Well that contains high-corrosion medium and course of conveying gradually, and adopt corrosion resisting alloy cost expensive, so composite bimetal pipe arises at the historic moment.Composite bimetal pipe is that the metal tube by two kinds of unlike materials forms: outer is high strength carbon steel tubing, internal layer is corrosion resistance alloy, between pipe layer, by various processing modes and technology, form and combine closely, tubing had both had good intensity and corrosion resistance, and cost is low, obtained the extensive approval of domestic and international market, development rapidly.
In composite bimetal pipe practical application, between composite pipe, joint connection is a great problem in exploitation of oil-gas field and medium transport thereof.Existing composite pipe internal layer anti-corrosion alloy layer thickness is less, general 2-4mm, while welding at the scene, because limiting, environmental conditions is difficult to make two composite pipe end complete matchings, cause the dislocation of internal layer anti-corrosion alloy, having welded the attenuation of the local inner alloy layer of rear joint even contacts with outer carbon steel, aggressive medium causes joint corrosion resistance ability sharply to decline, and greatly reduces the corrosion resistance ability kimonos labour time limit of whole conveyance conduit.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the purpose of this utility model is to provide a kind of composite bimetal pipe, have simple in structure, corrosion resistance and good, the advantage such as reliability is high, and cost is low, pipe joint convenient welding.
A kind of composite bimetal pipe, comprise inner tube 30 and outer tube 10, inner tube 30 is made by resistant material, inner tube 30 is positioned at the inside of outer tube 20, composite bimetal pipe also comprises joint 10, joint 10 connects by being weldingly connected with outer tube 20, and inner tube 30 is welded mutually with joint 10, and the second end of at least one joint 10 has welding groove.
Further, joint 10 is made by resistant material,
Further, outer tube 20 is made by carbon steel or low alloy steel.
Further, the two ends of outer tube 20 have groove.
Further, joint 10 comprises that the first joint 11, the first joints 11 are positioned at one end of outer tube 20, and joint also comprises that the second joint 12, the second joints 12 are positioned at the other end of outer tube 20.
Further, the first joint 11 is tubular configured joint, and its inner diameter equals the inner diameter of outer tube 20, and its outer diameter is more than or equal to outer tube 20 outer diameters; Inner tube 30 extends across the seam between the first joint 11 and outer tube 20, and is welded on the inwall of the first joint 11 ends.
Further, the second joint 12 is tubular configured joint, and its inner diameter equals the inner diameter of outer tube 20, and its outer diameter is more than or equal to outer tube 20 outer diameters; Inner tube 30 extends across the seam between the second joint 12 and outer tube 20, and is welded on the inwall of the second joint 12 ends.
Composite bimetal pipe of the present utility model completes because the foreign material between joint 10 and outer tube 20 is welded on manufactory, welding condition is good, strict implement is convenient in quality inspection, guaranteed weld strength, thereby make only need complete in constructing at the scene the welding of metal of the same race, and meet the requirement of join strength between pipeline, in addition, joint 10 adopts resistant material, avoided joint self to be corroded, also guaranteed the Safety performance that composite bimetal pipe is carried, improve greatly whole piece multiple tube corrosion-resistant ability, extended Years Of Service, reduced welding difficulty simultaneously, be convenient to composite pipe Site Welding, there is obvious economic benefit.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is outer tube of the present utility model and joint welding schematic diagram.
Fig. 3 is the utility model joint schematic diagram.
Fig. 4 is two composite tube welding schematic diagram.
In figure, 10-joint, the 11-the first joint, the 12-the second joint, 20-outer tube, 30-inner tube
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
As depicted in figs. 1 and 2 according to a kind of composite bimetal pipe of the present utility model, comprise outer tube 20 and inner tube 30, inner tube 30 is made by resistant material, inner tube 30 is positioned at the inside of outer tube 20.Composite bimetal pipe also comprises joint 10, and joint 10 connects by being weldingly connected with outer tube 20, and inner tube 30 is welded mutually with joint 10.The joint 10 of composite bimetal pipe adopts with being connected of outer tube 20 form that is welded to connect.The inner tube 30 that resistant material is made is corrosive medium while existing in Oil/gas Well, can guarantee that the aggressive medium in inner tube 30 does not contact outer tube 20, has guaranteed the Security that composite bimetal pipe is used.Inner tube 30 is welded mutually with joint 10, and inner tube 30 and joint 10 are linked together.Inner tube 30 is thin-walled plain-end tube, by inner tube 30 be placed on outer tube 20 interior after, by external force, make inner tube 30 enlargement deformation and be close to outer tube 20 and the inwall of joint 10, seal welding is carried out with the inwall of the joint 10 at outer tube 20 two ends respectively in the two ends of inner tube 30, aggressive medium in inner tube 30 and outer tube 20 are isolated completely, prevent that outer tube 20 is corroded.Preferably, joint 10 is made by resistant material.Outer tube 20 is made by carbon steel or low alloy steel.Joint 10 is processed by thick walled tube, and joint 10 is made by resistant material.Preferably, joint 10 adopts identical material with inner tube 30, the welding performance that has good decay resistance and match with inner tube 30, has avoided inner tube 30 and joint 10 to cause dissimilar metal welding when welding, has guaranteed join strength and the weld seam sealing Safety performance of the two.Or joint 10 also can adopt can with the resistant material of inner tube 30 good welds make similar with inner tube 30.Outer tube 20 is carbon steel or low alloy steel, and it is 4mm to 20mm that its external diameter is generally 60.3mm to 508mm thickness, and wall thickness is larger, is in use mainly used in bearing external force or interior pressure; Match with it, inner tube 30 is resistant materials, and the material of inner tube 30 is stainless steel, nickel-base alloy, titanium or titanium alloy or other corrosion resistant material, and thickness is 1mm to 4mm, and wall thickness is less.Inner tube 30 is close to the inwall of outer tube 20 and joint 10, mainly plays anticorrosive effect.Outer tube 20 adopts common carbon steel or low alloy steel, has guaranteed cost cheap of composite bimetal pipe; Inner tube 30 and joint 10 adopt resistant material, although the price of material is higher, because the wall thickness of inner tube 30 is less, joint 10 length are very short, when playing corrosion-resistant effect, also avoided the high cost of composite bimetal pipe.Therefore, composite bimetal pipe of the present utility model, under the prerequisite of assurance property indices, is limited in cost in rational scope, is conducive to popularization and the use of composite bimetal pipe in oil-gas field development.
According to an embodiment of the present utility model, as shown in Figure 1, joint 10 comprises that the first joint 11, the first joints 11 are positioned at one end of outer tube 20.Joint 11 also comprises that the second joint 12, the second joints 12 are positioned at the other end of outer tube 20.The groove at the two ends of outer tube 20 welds with the first joint 11 and the second joint 12 respectively.By the first joint 11 and the second joint 12, thereby many composite bimetal pipes are linked together, to reach the length of the pipeline of exploitation of oil-gas field needs.As shown in Figure 2, the first joint 11 is tubular configured joint, and its inner diameter equals the inner diameter of outer tube 20, and its outer diameter is more than or equal to outer tube 20 outer diameters.In the present embodiment, inner tube 30 extends across the seam between the first joint 11 and outer tube 20, and is welded on the inwall of the first joint 11 ends.Because the inner diameter of the first joint 11 equals the inner diameter of outer tube 20, therefore, after the first joint 11 is connected with outer tube 20, pipeline inner wall does not smoothly have projection.As shown in Figure 1, inner tube 30 extends across the seam of the first joint 11 and outer tube 20, and seam is sheltered from, and prevents that the aggressive medium in inner tube 30 from entering the seam crossing of the first joint 11 and outer tube 20 formation and corroding outer tube 20.Inner tube 30 is welded on the inwall of end of the one end not being connected with outer tube 20 of the first joint 11, and owing to being Metal Material Welding of the same race, so welding performance is fine, guarantees join strength and the weld joint close sealing property of inner tube 30 and the first joint 11.In addition, because weld seam is positioned at the outward edge of end of one end not being connected with outer tube 20 of the first joint 11, even if the diameter of the interior caliber of the first joint 11 is less, also can meets welding condition and weld.As shown in Figure 2, the second joint 12 is tubular configured joint, and its inner diameter equals the inner diameter of outer tube 20, and its outer diameter is more than or equal to outer tube 20 outer diameters.In the present embodiment, inner tube 30 extends across the seam between the second joint 12 and outer tube 20, and is welded on the inwall of the second joint 12 ends.Because the inner diameter of the second joint 12 equals the inner diameter of outer tube 20, therefore, after the second joint 12 is connected with outer tube 20, pipeline inner wall does not smoothly have projection.As shown in Figure 1, inner tube 30 extends across the seam of the second joint 12 and outer tube 20, and seam is sheltered from, and prevents that the aggressive medium in inner tube 30 from entering the seam crossing of the second joint 12 and outer tube 20 formation and corroding outer tube 20.Inner tube 30 is welded on the inwall of end of the one end not being connected with outer tube 20 of the second joint 12, and owing to being same metal solder, so welding performance is fine, guarantees join strength and the weld joint close sealing property of inner tube 30 and the second joint 12.In addition, because weld seam is positioned at the outward edge of end of one end not being connected with outer tube 20 of the second joint 12, even if the diameter of the interior caliber of the second joint 12 is less, also can meets welding condition and weld.
The manufacturing technology scheme of the present embodiment is as follows:
1, the first joint 11 and the interior hole dimension of the second joint 12 and the endoporus of outer tube 20 are measure-alike, than the large 1mm to 4mm of the external diameter of inner tube 30;
2, clean the endoporus of outer tube 20 and the outer surface of inner tube 30, except degreasing and oxide;
3, the two ends finished edge of outer tube 20;
4, the first joint 11 and the second joint 12 finished edges;
5, outer tube 20 and joint 10 welding, weld the first joint 11 in outer tube 20 one end, at outer tube 20 the other ends, welds the second joint 12;
6, inner tube 30 is inserted in the outer tube 20 of two ends with joint;
7, with seal ring, in joint, two ends, seal, inner tube 30 is applied to hydraulic coupling and swell, inner tube 30 outer walls and outer tube 20 and inner nosepiece wall are close to compound, hydraulic coupling is determined according to the strength grade of external diameter, thickness and the material of outer tube 20 and inner tube 30.
8, the inwall of the two ends of inner tube 30 and two joints carries out seal welding;
From above description, can find out, above-described embodiment of the present utility model has been realized following technique effect: composite bimetal pipe of the present utility model, comprise inner and outer tubes, inner tube is made by resistant material, and inner tube is positioned at the inside of outer tube, and composite bimetal pipe also comprises joint, joint and outer tube connect by being weldingly connected, and inner tube is welded mutually with joint.The inner tube that resistant material is made, has guaranteed that tube inner corrosion medium does not contact outer tube, has guaranteed the Security that composite bimetal pipe is used.The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a composite bimetal pipe, comprise inner tube (30) and outer tube (20), it is characterized in that, inner tube (30) is made by resistant material, inner tube (30) is positioned at the inside of outer tube (20), and composite bimetal pipe also comprises joint (10), and joint (10) connects by being weldingly connected with outer tube (20), inner tube (30) is welded mutually with joint (10), and second end of at least one joint (10) has welding groove.
2. composite bimetal pipe according to claim 1, is characterized in that, described joint (10) is made by resistant material.
3. composite bimetal pipe according to claim 1, is characterized in that, described outer tube (20) is made by carbon steel or low alloy steel.
4. composite bimetal pipe according to claim 1, is characterized in that, the two ends of described outer tube (20) have groove.
5. composite bimetal pipe according to claim 1, it is characterized in that, joint (10) comprises the first joint (11), the first joint (11) is positioned at one end of described outer tube (20), joint (10) also comprises the second joint (12), and the second joint (12) is positioned at the other end of outer tube (20).
6. composite bimetal pipe according to claim 5, is characterized in that, described the first joint (11) is tubular configured joint, and its inner diameter equals the inner diameter of outer tube (20), and its outer diameter is more than or equal to outer tube (20) outer diameter; Inner tube (30) extends across the seam between the first joint (11) and outer tube (20), and is welded on the inwall of the first joint (11) end.
7. composite bimetal pipe according to claim 5, is characterized in that, described the second joint (12) is tubular configured joint, and its inner diameter equals the inner diameter of outer tube (20), and its outer diameter is more than or equal to outer tube (20) outer diameter; Inner tube (30) extends across the seam between the second joint (12) and outer tube (20), and is welded on the inwall of the second joint (12) end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569845.3U CN203477637U (en) | 2013-09-13 | 2013-09-13 | Bimetal composite pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569845.3U CN203477637U (en) | 2013-09-13 | 2013-09-13 | Bimetal composite pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203477637U true CN203477637U (en) | 2014-03-12 |
Family
ID=50225968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320569845.3U Expired - Lifetime CN203477637U (en) | 2013-09-13 | 2013-09-13 | Bimetal composite pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203477637U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486341A (en) * | 2013-09-13 | 2014-01-01 | 中国重型机械研究院股份公司 | Bimetal composite tube |
| CN113118239A (en) * | 2021-04-22 | 2021-07-16 | 西部金属材料股份有限公司 | Preparation method of bimetal composite pipe |
-
2013
- 2013-09-13 CN CN201320569845.3U patent/CN203477637U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486341A (en) * | 2013-09-13 | 2014-01-01 | 中国重型机械研究院股份公司 | Bimetal composite tube |
| CN113118239A (en) * | 2021-04-22 | 2021-07-16 | 西部金属材料股份有限公司 | Preparation method of bimetal composite pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101205994B (en) | Metallic composite pipeline, its manufacture method and continuous etching-resistant pipe formed therefor | |
| CN202349474U (en) | Double-metal composite butt welding three-way pipe fitting | |
| CN101915064A (en) | Bimetal compound pipe | |
| CN203477637U (en) | Bimetal composite pipe | |
| CN104075047A (en) | Tungsten alloy plated pipeline welding port connecting method | |
| CN103486341A (en) | Bimetal composite tube | |
| CN202176274U (en) | Air sealing threaded connecting structure for double-metal compound oil casing pipes | |
| CN101270837A (en) | Non-welding flange-connection stainless steel metal flexible pipe and production method | |
| CN201835756U (en) | Bimetal composited tube | |
| CN210318857U (en) | Bimetal corrosion-resistant oil casing and connecting device thereof | |
| CN203230975U (en) | Pipeline connection device | |
| CN204647602U (en) | A kind of composite bimetal pipe pipe end linkage structure | |
| CN202349420U (en) | Corrosion-resisting pipeline joint formed by welding of steel pipes made of different materials | |
| CN202349404U (en) | Bi-metal composite pipe with end parts being with external threads | |
| CN104896218A (en) | Bimetal composite pipe end connecting device | |
| CN201836559U (en) | Thread seal joint for connecting bimetal tube with external diameter being not less than 30mm | |
| CN206519668U (en) | A kind of nuclear power plant's sea water service system pipeline branch pipe and the attachment structure of supervisor | |
| CN201137793Y (en) | Steel pipe welding interface anti-corrosive protection joint | |
| CN206904387U (en) | The corrosion-resistant multiple tube of pipeline engineering | |
| CN114087459A (en) | End-to-end connection method for pipelines with inner corrosion-resistant layers | |
| CN202580422U (en) | Mechanical bimetal composite three-way pipe fitting | |
| CN102734574A (en) | Pipe joint component and safety locking pipeline connection system comprising same | |
| CN202358296U (en) | Device for connecting dosing pipeline and ballast water main pipeline of ship ballast water management system | |
| CN217540038U (en) | Sleeve tee joint | |
| CN205606001U (en) | Ribbed pipe in reinforced (rfd) dual reinforcing of T type glass fiber subassembly butt fusion |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140312 |
|
| CX01 | Expiry of patent term |