CN203453656U - Welding short section of carbon steel and stainless steel or bimetal composite pipe pipeline - Google Patents
Welding short section of carbon steel and stainless steel or bimetal composite pipe pipeline Download PDFInfo
- Publication number
- CN203453656U CN203453656U CN201320538061.4U CN201320538061U CN203453656U CN 203453656 U CN203453656 U CN 203453656U CN 201320538061 U CN201320538061 U CN 201320538061U CN 203453656 U CN203453656 U CN 203453656U
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- carbon steel
- pipe
- inner chamber
- welding
- 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 - Fee Related
Links
- 239000010935 stainless steel Substances 0.000 title claims abstract description 37
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 37
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 29
- 239000010962 carbon steel Substances 0.000 title claims abstract description 29
- 238000003466 welding Methods 0.000 title claims abstract description 17
- 239000002131 composite material Substances 0.000 title claims abstract description 11
- 238000009413 insulation Methods 0.000 claims description 11
- 210000002445 nipple Anatomy 0.000 claims description 6
- 230000007797 corrosion Effects 0.000 abstract description 11
- 238000005260 corrosion Methods 0.000 abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 238000002955 isolation Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- -1 pottery Polymers 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Images
Landscapes
- Arc Welding In General (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
A short joint for welding a carbon steel and stainless steel or bimetal composite pipe belongs to the technical field of oil gas gathering, transportation and storage. The inner chamber inside lining of the one end of parent tube has the stainless steel bushing pipe, and the second length of stainless steel bushing pipe is 1/5 ~ 4/5 with first total length's ratio, and the middle part inner chamber of parent tube has insulating lining, and insulating lining covers the inner chamber of stainless steel bushing pipe and parent tube, and insulating lining's third length is 1/10 ~ 3/4 with first total length's ratio. The utility model has the advantages that utilize the insulating layer to cut off the water film electron channel between carbon steel and the stainless steel to reduce both contact area's galvanic corrosion, can effectively solve the galvanic corrosion problem that causes after carbon steel and stainless steel or the welding of bimetal composite pipe, prolong the life of pipeline.
Description
Technical field
The utility model relates to the welding pipe nipple of a kind of carbon steel and stainless steel or composite bimetal pipe pipeline, belongs to oil-gas gathering and transportation, storaging and transport technology field.
Background technique
In oil-gas gathering and transportation, accumulating field, the wider tubing of application is carbon steel, stainless steel and dual-metal clad steel pipe.Wherein, carbon steel tubing cost is minimum, but corrosion resistance is the poorest; Stainless steel pipe corrosion resistance is best, but cost is the highest; Dual-metal clad steel pipe is generally composited by double layer of metal, and skin is carbon steel, and internal layer is stainless steel, and its cost performance is the highest.Be limited to the influence factors such as cost, difficulty of processing, in practical application, often aforementioned tubes be used in combination.Therefore, carbon steel and stainless steel or dual-metal clad steel pipe pipeline enclosure be welded to connect very general.But, because carbon steel is not identical with the corrosion potential of stainless steel or dual-metal clad steel pipe tubing, the moisture film that simultaneously moisture in oil gas medium can form certain length at metal inner surface becomes electron channel as electrolyte, electronics constantly moves to by the lower carbon steel of current potential the stainless steel that current potential is higher, form galvanic corrosion and cause carbon steel piping corrosion to accelerate, and then affect the safe operation of whole pipe-line system.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model provides the welding pipe nipple of a kind of carbon steel and stainless steel or composite bimetal pipe pipeline.
The welding pipe nipple of a kind of carbon steel and stainless steel or composite bimetal pipe pipeline, in the inner chamber of one end of base tube, be lined with stainless steel lining pipe, the second length of stainless steel bushing pipe is 1/5～4/5 with the ratio of the first total length, the middle part inner chamber of base tube has insulation lining, insulation lining covers the inner chamber of stainless steel bushing pipe and base tube, and insulation the 3rd length of lining and the ratio of the first total length are 1/10～3/4.
The utility model has the advantages that and utilize isolation layer to cut off the moisture film electron channel between carbon steel and stainless steel, to reduce the galvanic corrosion of both contact areas, can effectively solve the galvanic corrosion problem causing after carbon steel and stainless steel or composite bimetal pipe welding, extend the working life of pipeline.
Accompanying drawing explanation
When considered in conjunction with the accompanying drawings, by the detailed description with reference to below, can more completely understand better the utility model and easily learn wherein many advantages of following, but accompanying drawing described herein is used to provide further understanding of the present utility model, form a part of the present utility model, schematic description and description of the present utility model is used for explaining the utility model, do not form improper restriction of the present utility model, as schemed wherein:
Fig. 1 is structural representation of the present utility model.
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment
Obviously, the many modifications and variations that those skilled in the art do based on aim of the present utility model belong to protection domain of the present utility model.
Embodiment 1: as shown in Figure 1, the welding pipe nipple of a kind of carbon steel and stainless steel or composite bimetal pipe pipeline, base tube 1 is carbon steel pipes, in the inner chamber of one end of base tube 1, be lined with stainless steel lining pipe 2, the second length L 1 of stainless steel bushing pipe 2 and the ratio of the first total length L are 1/5～4/5, the middle part inner chamber of base tube 1 has insulation lining 3, and insulation lining 3 covers the inner chamber of stainless steel bushing pipe 2 and base tube 1, and insulation the 3rd length L 2 of lining 3 and the ratio of the first total length L are 1/10～3/4.
The material of described isolation layer 3 is a kind of or composite material of nonmetallic epoxy resin, pottery, plastics, rubber; Conventionally adopt the pottery of aluminium oxide, zirconium oxide material to do insulation lining 3.
When carbon steel and stainless-steel pipe pipeline welding, carbon steel pipes and the welding of A end face, Stainless Steel Tube and the welding of B end face; And when carbon steel and dual-metal clad steel pipe pipeline welding, carbon steel pipes and the welding of A end face, dual-metal clad steel pipe and the welding of B end face.
After carbon steel tubing and stainless steel pipe or the welding of dual-metal clad steel pipe material, the insulation lining that has certain length between stainless steel and carbon steel material, it has cut off the moisture film electron channel between carbon steel and stainless steel, can effectively reduce the galvanic corrosion of both contact areas, extend the working life of pipeline.Take carbon steel L415 and Stainless steel 316 L is example, and laboratory data shows: the utility model can make the rate of corrosion between carbon steel and stainless steel be down to 0.1mm/a by 5.73mm/a, has therefore effectively extended the working life of pipeline.
As mentioned above, embodiment of the present utility model is explained, but as long as not departing from fact inventive point of the present utility model and effect can have a lot of distortion, this will be readily apparent to persons skilled in the art.Therefore, within such variation is also all included in protection domain of the present utility model.
Claims (1)
1. the welding pipe nipple of a carbon steel and stainless steel or composite bimetal pipe pipeline, it is characterized in that being lined with stainless steel lining pipe in the inner chamber of one end of base tube, the second length of stainless steel bushing pipe is 1/5～4/5 with the ratio of the first total length, the middle part inner chamber of base tube has insulation lining, insulation lining covers the inner chamber of stainless steel bushing pipe and base tube, and insulation the 3rd length of lining and the ratio of the first total length are 1/10～3/4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538061.4U CN203453656U (en) | 2013-08-30 | 2013-08-30 | Welding short section of carbon steel and stainless steel or bimetal composite pipe pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320538061.4U CN203453656U (en) | 2013-08-30 | 2013-08-30 | Welding short section of carbon steel and stainless steel or bimetal composite pipe pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203453656U true CN203453656U (en) | 2014-02-26 |
Family
ID=50133532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320538061.4U Expired - Fee Related CN203453656U (en) | 2013-08-30 | 2013-08-30 | Welding short section of carbon steel and stainless steel or bimetal composite pipe pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203453656U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214439A (en) * | 2014-08-28 | 2014-12-17 | 中国海洋石油总公司 | Insulating device for dissimilar metal submarine pipelines |
| CN105932441A (en) * | 2016-06-22 | 2016-09-07 | 苏州热工研究院有限公司 | Device for preventing galvanic corrosion of dissimilar metal equipment/part |
-
2013
- 2013-08-30 CN CN201320538061.4U patent/CN203453656U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214439A (en) * | 2014-08-28 | 2014-12-17 | 中国海洋石油总公司 | Insulating device for dissimilar metal submarine pipelines |
| CN105932441A (en) * | 2016-06-22 | 2016-09-07 | 苏州热工研究院有限公司 | Device for preventing galvanic corrosion of dissimilar metal equipment/part |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140226 Termination date: 20210830 |