CN111895188A - Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve - Google Patents
Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve Download PDFInfo
- Publication number
- CN111895188A CN111895188A CN202010871837.9A CN202010871837A CN111895188A CN 111895188 A CN111895188 A CN 111895188A CN 202010871837 A CN202010871837 A CN 202010871837A CN 111895188 A CN111895188 A CN 111895188A
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- section
- corrosion
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- pipe
- resistant
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- 238000005260 corrosion Methods 0.000 title claims abstract description 83
- 239000002184 metal Substances 0.000 title claims abstract description 37
- 230000007797 corrosion Effects 0.000 claims abstract description 57
- 230000007704 transition Effects 0.000 claims abstract description 29
- 238000000576 coating method Methods 0.000 claims description 24
- 239000012790 adhesive layer Substances 0.000 claims description 16
- 238000003466 welding Methods 0.000 claims description 13
- 230000004323 axial length Effects 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 2
- 239000003638 chemical reducing agent Substances 0.000 claims 4
- 238000010276 construction Methods 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 description 17
- 229910000831 Steel Inorganic materials 0.000 description 4
- 238000005536 corrosion prevention Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000004021 metal welding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/02—Rigid pipes of metal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
- F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
- F16L58/04—Coatings characterised by the materials used
- F16L58/08—Coatings characterised by the materials used by metal
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
Abstract
The invention relates to an inner and outer anti-corrosion pipe with a corrosion-resistant metal sleeve lined at the pipe end, which comprises a pipeline body (1) and a corrosion-resistant metal lining (2) arranged in the pipeline body (1), wherein the pipeline body (1) comprises a constant-diameter section (101), a transition section (102) and an expanding section (103) which are sequentially connected, the corrosion-resistant metal lining (2) comprises a diameter-changing section (201) and a straight section (202) which are sequentially connected, the corrosion-resistant metal lining (2) is arranged in the expanding section (103), the free end of the diameter-changing section (201) is positioned at the joint of the transition section (102) and the expanding section (103), and a gap is arranged between the diameter-changing section (201) and the expanding section (103). Compared with the prior art, the invention can ensure the normal construction of the pipeline without influencing the integrity of the anti-corrosion function of the pipeline, and has low manufacturing cost.
Description
Technical Field
The invention relates to the field of anticorrosion processing and construction of a conveying steel pipe, in particular to an internal and external anticorrosion pipe with a corrosion-resistant metal sleeve lined in the pipe end.
Background
The coating is adopted to carry out internal and external corrosion prevention on the pipeline, which is an effective method for carrying out corrosion prevention on the conveying pipeline, but the corrosion prevention layer near the interface can be subjected to welding high-temperature burning loss during the butt joint construction of the pipeline, so that the corrosion at the joint is aggravated, and the internal and external coating corrosion prevention technology is difficult to popularize and apply. The whole pipe adopts a mode of lining with the corrosion-resistant metal sleeve, so that the cost of the pipeline is increased rapidly, and in addition, the quality of the whole pipe is difficult to control, namely the application of the composite metal pipeline is greatly restricted by the higher construction cost. Therefore, it is an urgent need to provide an anticorrosive pipe which has low cost and meets the traditional construction requirements.
Disclosure of Invention
The invention aims to provide an inner and outer anti-corrosion pipe with a pipe end lined with an anti-corrosion metal sleeve, which can ensure the normal construction of a pipeline, does not influence the integrity of the anti-corrosion function of the pipeline and has low manufacturing cost.
The purpose of the invention is realized by the following technical scheme:
the inner and outer anti-corrosion pipes comprise a pipe body and an anti-corrosion metal lining arranged in the pipe body, wherein the pipe body comprises a constant diameter section, a transition section and an expanding section which are sequentially connected, the anti-corrosion metal lining comprises a reducing section and a straight section which are sequentially connected, the anti-corrosion metal lining is arranged in the expanding section, the free end of the reducing section is positioned at the joint of the transition section and the expanding section, a gap is arranged between the reducing section and the expanding section, the inner diameter of the free end of the reducing section is smaller than that of the fixed end of the reducing section, and the reducing section is gradually away from the axis of the anti-corrosion metal lining along the direction of the reducing section and the straight section. The pipeline body is made of the existing common steel pipe, the pipe end of the common steel pipe is subjected to expanding and shaping, the inner diameter of the pipe end is kept within a certain error range, and the pipeline body is obtained.
The axial length of the corrosion-resistant metal lining is greater than that of the diameter expanding section, the corrosion-resistant metal lining is pressed into the pipe end of the pipeline body, namely the diameter expanding section, and the straight section of the corrosion-resistant metal lining is reserved with a length capable of being welded, so that welding is facilitated.
The straight section part protruding out of the diameter expanding section is connected with the free end of the diameter expanding section through continuous welding to form a circle of welding spots along the circumferential direction, the welding spots are positioned between the outer side wall of the straight section and the inner side wall of the diameter expanding section, and corrosion-resistant metal welding rods are adopted for operation during welding.
The gap between the diameter-changing section and the diameter-expanding section is filled with a first adhesive layer, the first adhesive layer can completely isolate the diameter-changing section from the transition section, so that the fixing effect is achieved, and the conditions of corrosion and the like caused by other substances entering the gap can be avoided.
The axial length of the variable diameter section is consistent with that of the transition section.
The outer diameter of the straight section is consistent with the inner diameter of the diameter expanding section, so that the corrosion-resistant metal lining can be tightly attached in the diameter expanding section, and a gap between the corrosion-resistant metal lining and the diameter expanding section is avoided.
The inner diameter of the straight section is slightly larger than that of the constant-diameter section, and is determined by the inclination of the side wall of the variable-diameter section.
The inclination of the side wall of the variable-diameter section is far more gentle than that of the side wall of the transition section, and the specific inclination of the variable-diameter section and the side wall of the transition section can be set according to the condition of a construction site.
The inner diameter of the free end of the variable-diameter section is consistent with that of the constant-diameter section.
And a second adhesive layer with gradually changed thickness is arranged on the inner side wall of the transition section along the circumferential direction, the inner diameter of the second adhesive layer is consistent with that of the constant-diameter section, and the thickness of the second adhesive layer gradually becomes thicker along the direction of the transition section and the diameter-expanding section. The first adhesive layer and the second adhesive layer are integrated at the joint, and the second adhesive layer covers the inner anti-corrosion coating on the transition section, so that the inner anti-corrosion coating can be protected, the damage to the inner anti-corrosion coating during joint construction can be reduced, and the influence of the change of the inner diameter of the end part of the pipeline body caused by expanding can be eliminated.
And inner anti-corrosion coatings are arranged on the inner side walls of the constant-diameter section and the transition section.
And outer anti-corrosion coatings are arranged on the outer side walls of the constant-diameter section and the transition section. In order to avoid the situation that the inner anti-corrosion coating and the outer anti-corrosion coating are damaged by high temperature during construction, the inner anti-corrosion coating and the outer anti-corrosion coating are not directly arranged on the diameter expanding section serving as a welding heat affected area, namely a blank is left in the length range of the diameter expanding section. The inner anticorrosion coating and the outer anticorrosion coating are coated by adopting the existing anticorrosion coating.
The wall thicknesses of the constant diameter section, the transition section and the diameter expanding section are the same.
The constant diameter section, the transition section and the diameter expanding section are integrally formed, and the diameter changing section and the straight section are integrally formed.
Compared with the prior art, the invention expands the pipe end of the common steel pipe to form the transition section and the expanded section, arranges the corrosion-resistant metal lining in the expanded section, fixedly connects the corrosion-resistant metal lining and the expanded section through welding and adhesive, can ensure the smooth construction when the two pipelines are jointed, ensures that the welding high temperature can not cause the reduction of the corrosion-resistant function of the corrosion-resistant metal lining when the pipe ends of the two pipelines are butt-welded, ensures that the welding residual temperature of the corrosion-resistant adhesive and the corrosion-resistant coating far away from the pipe ends can not reach the temperature which can destroy the performance of the pipe ends, protects the integrity of the inner and outer coatings of the pipelines, does not influence the integrity of the corrosion-resistant function of the pipelines, is beneficial to the operation of on-site welding construction, does not need to adopt the pipelines of which are made of corrosion-resistant metal, has the advantage of low, the influence of the change of the inner diameter of the pipeline body caused by the diameter expansion is eliminated.
Drawings
FIG. 1 is a schematic structural view of an inner and outer corrosion-resistant pipe;
FIG. 2 is an enlarged view taken at A in FIG. 1;
FIG. 3 is an enlarged view at B of FIG. 1;
FIG. 4 is a schematic structural view of a pipe body;
FIG. 5 is a schematic structural view of a pipe body provided with an inner anticorrosive coating and an outer anticorrosive coating;
FIG. 6 is a schematic view of a corrosion resistant metal liner.
In the figure: 1-a pipe body; 101-a constant diameter section; 102-a transition section; 103-expanding section; 2-corrosion resistant metal lining; 201-a reducing section; 202-straight section; 3-welding spots; 4-a first adhesive layer; 5-a second adhesive layer; 6-inner anti-corrosion coating; 7-external anti-corrosion coating.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments.
Examples
As shown in fig. 1, 2, 3, 4, 5, and 6, an inner and outer corrosion-resistant pipe with a corrosion-resistant metal sleeve lined at the pipe end comprises a pipe body 1 and a corrosion-resistant metal lining 2 disposed in the pipe body 1, the pipe body 1 comprises a constant diameter section 101, a transition section 102, and an expanding section 103 (specifically shown in fig. 4) connected in sequence, the constant diameter section 101, the transition section 102, and the expanding section 103 are integrally formed, and have the same wall thickness, as shown in fig. 5, inner corrosion-resistant coatings 6 are disposed on inner side walls of the constant diameter section 101 and the transition section 102, outer corrosion-resistant coatings 7 are disposed on outer side walls of the constant diameter section 101 and the transition section 102, the corrosion-resistant metal lining 2 comprises a diameter-changing section 201 (in a tapered shape) and a straight section 202 (in a straight cylinder shape) (specifically shown in fig. 6) connected in sequence, the diameter-changing section 201 and the straight section 202 are integrally formed, the corrosion-resistant metal lining 2 is disposed in the expanding, the free end of the diameter-changing section 201 is located at the connection position of the transition section 102 and the diameter-expanding section 103 (in fig. 6, the free end of the diameter-changing section 201 is the left end of the diameter-changing section 201, the fixed end of the diameter-changing section 201 is the right end of the diameter-changing section 201), the inner diameter of the free end of the diameter-changing section 201 is smaller than the inner diameter of the fixed end of the diameter-changing section 201, a gap is arranged between the diameter-changing section 201 and the diameter-expanding section 103, the gap is filled with a first adhesive layer 4 (specifically shown in fig. 3), a second adhesive layer 5 with gradually changed thickness is arranged on the inner side wall of the transition section 102 along the circumferential direction, the inner diameter of the second adhesive layer 5 is consistent with the inner diameter of the constant diameter section 101 (specifically shown in fig. 3), the axial length of the corrosion-resistant metal lining 2 is greater than the axial length of the diameter-expanding section 103, the straight section 202 protruding out of the diameter-expanding section 103 is connected with the free end of the diameter-expanding section, the axial length of the variable-diameter section 201 is consistent with that of the transition section 102, the outer diameter of the straight section 202 is consistent with that of the expanding section 103, and the inner diameter of the free end of the variable-diameter section 201 is consistent with that of the constant-diameter section 101.
The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (10)
1. The utility model provides an inside and outside anticorrosive pipe that pipe end inside lining has corrosion-resistant metal covering, characterized in that, inside and outside anticorrosive pipe includes pipeline body (1) and locates corrosion-resistant metal inside lining (2) in pipeline body (1), pipeline body (1) is including constant diameter section (101), changeover portion (102) and hole enlargement section (103) that connect gradually, corrosion-resistant metal inside lining (2) are including reducer section (201) and straight section (202) that connect gradually, inside in hole enlargement section (103) is located in corrosion-resistant metal inside lining (2), the free end of reducer section (201) is located the junction of changeover portion (102) and hole enlargement section (103), be equipped with the space between reducer section (201) and hole enlargement section (103).
2. The corrosion-resistant metal-lined inner and outer corrosion-resistant pipe with a pipe end lined with a corrosion-resistant metal sleeve as claimed in claim 1, wherein the axial length of the corrosion-resistant metal lining (2) is greater than the axial length of the expanded diameter section (103).
3. The corrosion-resistant metal-lined inside and outside corrosion-resistant pipe as claimed in claim 2, wherein the portion of the straight section (202) protruding outside the expanded diameter section (103) and the free end of the expanded diameter section (103) are connected by continuous welding.
4. The corrosion-resistant metal-lined inner and outer corrosion-resistant pipe of claim 1, wherein a gap between the diameter-reducing section (201) and the diameter-expanding section (103) is filled with a first adhesive layer (4).
5. The corrosion resistant metal-lined inner and outer corrosion resistant pipe of claim 1, wherein the axial lengths of the reducer section (201) and the transition section (102) are the same.
6. The corrosion-resistant metal-lined inner and outer corrosion-resistant pipes as set forth in claim 1, wherein the outer diameter of said straight section (202) and the inner diameter of said expanded diameter section (103) are identical.
7. The corrosion resistant metal-lined inner and outer corrosion resistant pipe as claimed in claim 1, wherein the inner diameter of the free end of said reducing section (201) is identical to the inner diameter of said constant diameter section (101).
8. The inner and outer corrosion-resistant pipe with the pipe end lined with the corrosion-resistant metal sleeve as claimed in claim 1, wherein a second adhesive layer (5) with gradually changed thickness is arranged on the inner side wall of the transition section (102) along the circumferential direction, and the inner diameter of the second adhesive layer (5) is consistent with the inner diameter of the constant diameter section (101).
9. The pipe of claim 1, wherein the inner and outer corrosion-resistant pipes are provided with inner corrosion-resistant coatings (6) on the inner side walls of the constant diameter section (101) and the transition section (102), and outer corrosion-resistant coatings (7) on the outer side walls of the constant diameter section (101) and the transition section (102).
10. The corrosion-resistant metal-lined inner and outer corrosion-resistant pipe of claim 1, wherein the constant diameter section (101), the transition section (102) and the diameter expansion section (103) are integrally formed, and the diameter reduction section (201) and the flat section (202) are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010871837.9A CN111895188A (en) | 2020-08-26 | 2020-08-26 | Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010871837.9A CN111895188A (en) | 2020-08-26 | 2020-08-26 | Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111895188A true CN111895188A (en) | 2020-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010871837.9A Pending CN111895188A (en) | 2020-08-26 | 2020-08-26 | Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111895188A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028154A (en) * | 2021-03-31 | 2021-06-25 | 西安向阳航天材料股份有限公司 | Mechanical bimetal composite pipe with thickened pipe end lining layer and preparation method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1262407A (en) * | 2000-02-01 | 2000-08-09 | 程一钱 | Weldable compound bimetal pipe |
| RU2154221C1 (en) * | 1999-07-21 | 2000-08-10 | Общество с ограниченной ответственностью "Инженерно-производственный центр" | Method of connection of metal pipes provided with anticorrosive lining |
| CN208074296U (en) * | 2018-03-24 | 2018-11-09 | 郭常军 | A kind of flaring lining stainless steel anti-corrosion drag-reducing abrasion-resisting composite steel tube pipeline |
| US20200011472A1 (en) * | 2018-07-03 | 2020-01-09 | Wei Xie | Oilfield tubing and methods for making oilfield tubing |
| CN212455799U (en) * | 2020-08-26 | 2021-02-02 | 上海图博可特石油管道涂层有限公司 | Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve |
-
2020
- 2020-08-26 CN CN202010871837.9A patent/CN111895188A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2154221C1 (en) * | 1999-07-21 | 2000-08-10 | Общество с ограниченной ответственностью "Инженерно-производственный центр" | Method of connection of metal pipes provided with anticorrosive lining |
| CN1262407A (en) * | 2000-02-01 | 2000-08-09 | 程一钱 | Weldable compound bimetal pipe |
| CN208074296U (en) * | 2018-03-24 | 2018-11-09 | 郭常军 | A kind of flaring lining stainless steel anti-corrosion drag-reducing abrasion-resisting composite steel tube pipeline |
| US20200011472A1 (en) * | 2018-07-03 | 2020-01-09 | Wei Xie | Oilfield tubing and methods for making oilfield tubing |
| CN212455799U (en) * | 2020-08-26 | 2021-02-02 | 上海图博可特石油管道涂层有限公司 | Internal and external anti-corrosion pipe with pipe end lined with anti-corrosion metal sleeve |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113028154A (en) * | 2021-03-31 | 2021-06-25 | 西安向阳航天材料股份有限公司 | Mechanical bimetal composite pipe with thickened pipe end lining layer and preparation method thereof |
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