CN111486276A - Double-wall integral steel corrugated pipe and manufacturing process thereof - Google Patents
Double-wall integral steel corrugated pipe and manufacturing process thereof Download PDFInfo
- Publication number
- CN111486276A CN111486276A CN202010291224.8A CN202010291224A CN111486276A CN 111486276 A CN111486276 A CN 111486276A CN 202010291224 A CN202010291224 A CN 202010291224A CN 111486276 A CN111486276 A CN 111486276A
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- corrugated
- pipe section
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- wall
- pipe
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000005096 rolling process Methods 0.000 claims abstract description 9
- 238000003825 pressing Methods 0.000 claims abstract description 6
- 238000003466 welding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- 239000000945 filler Substances 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 239000004567 concrete Substances 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 description 8
- 238000007789 sealing Methods 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000006072 paste Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000002689 soil 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
- F16L9/17—Rigid pipes obtained by bending a sheet longitudinally and connecting the edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/156—Making tubes with wall irregularities
- B21C37/158—Protrusions, e.g. dimples
-
- 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
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a double-wall integral steel corrugated pipe and a manufacturing process thereof, wherein the double-wall integral steel corrugated pipe comprises a plurality of sections of unit pipe sections which are sequentially sealed and sleeved from front to back; the unit pipe section is divided into a corrugated pipe section and a linear pipe section along the axial direction of the unit pipe section, and the outer diameter of the linear pipe section is equal to the minimum inner diameter of the corrugated pipe section; in the front and back two interconnected unit pipe sections: the first corrugated inner wall at the front end of the next corrugated pipe section is sleeved on the last corrugated outer wall at the rear end of the previous corrugated pipe section, and the next corrugated pipe section is sleeved outside the previous straight pipe section. The invention also provides a manufacturing process of the double-wall integral steel corrugated pipe, which comprises the steps of firstly pressing the flat steel plate into corrugations, then rolling a single flat corrugated plate pressed out by the flat steel plate into a unit pipe section, and finally sleeving the unit pipe section to form the double-wall integral steel corrugated pipe.
Description
Technical Field
The invention relates to the technical field of corrugated pipes, in particular to a double-wall integral steel corrugated pipe and a manufacturing process thereof.
Background
The metal corrugated pipe is a pipe with corrugated outer bands, is generally used for culvert drainage or traffic roadways and the like, and is made of galvanized steel plates. However, the existing conventional corrugated pipes are all formed by pressing a waveform by using single-layer steel plates, the inside of each corrugated pipe is corrugated as well as the outer wall, the flowing water is easy to cause soil deposition when passing through, and the anti-scouring and corrosion-resisting properties are poor.
Therefore, how to provide a corrugated pipe with strong erosion resistance, corrosion resistance and waterproof sealing performance and a manufacturing process thereof are problems to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the present invention provides a double-wall integral steel corrugated pipe, which aims to solve the above technical problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
a double-wall integral steel corrugated pipe comprises a plurality of sections of unit pipe sections which are sequentially sealed and sleeved from front to back; the unit pipe section is divided into a corrugated pipe section and a linear pipe section along the axial direction of the unit pipe section, and the outer diameter of the linear pipe section is equal to the minimum inner diameter of the corrugated pipe section; in the front and back two interconnected unit pipe sections: the first corrugated inner wall at the front end of the next corrugated pipe section is sleeved on the last corrugated outer wall at the rear end of the previous corrugated pipe section, and the next corrugated pipe section is sleeved on the outer side of the previous linear pipe section.
Through the technical scheme, the double-wall integral steel corrugated pipe is formed by sleeving a plurality of sections of unit pipe sections with corrugated pipe sections and linear pipe sections, the outer wall of the double-wall integral steel corrugated pipe is corrugated, the inner wall of the double-wall integral steel corrugated pipe is straight-pipe-shaped, the bearing capacity is improved, the service life of the inner wall of the double-wall integral steel corrugated pipe is prolonged smoothly, and the double-wall integral steel corrugated pipe is strong in scour prevention.
It should be noted that the outer diameter of the linear pipe section is equal to the minimum inner diameter of the corrugated pipe section, so that the two unit pipe sections can be firmly clamped, and for the convenience of sleeving, the outer diameter of the linear pipe section can be slightly smaller than the minimum inner diameter of the corrugated pipe section, and the smaller range does not affect the sleeving and fixing of the two unit pipe sections.
Preferably, in the double-wall integral type corrugated steel pipe, the corrugated clamping joints in the two sections of the unit pipe sections are circumferentially fixed through bolts, anchors or welding. Can realize the stable connection between the unit pipe sections, and can improve its sealing performance.
Preferably, in the double-walled integral type corrugated steel pipe of the above-described type, the unit pipe sections are rolled from a single flat corrugated plate; the flat corrugated plate has a corrugated portion corresponding to the corrugated pipe section, and a linear portion corresponding to the linear pipe section. The corrugated part is convenient to manufacture and easy to process.
Preferably, in the double-wall integral type corrugated steel pipe, the rolling butt joints of the flat corrugated plates are fixed by bolts, anchors or welding. Different connection modes can be selected according to different use requirements, the selectable range is wide, and the connection is convenient.
Preferably, in the double-walled integral type corrugated steel pipe described above, in the front and rear two interconnected unit pipe sections: the front straight line pipe section is provided with a raised arc-shaped snap ring at the rear end, and the arc-shaped snap ring is clamped with the rear corrugated inner wall of the corrugated pipe section. Further improve the structural stability of the muff coupling.
The arc-shaped clamping ring is used for being connected with the next section of corrugated pipe section on one hand, and on the other hand, the arc-shaped clamping ring is used for preventing a structure with three layers of steel plates from being formed, so that the connection and fixation between two sections of unit pipe sections are influenced, and the position interference is prevented.
Preferably, in the double-walled integral type corrugated steel pipe described above, in the front and rear two interconnected unit pipe sections: and filling materials are filled in a gap between the inner wall of the next corrugated pipe section and the outer wall of the previous linear pipe section. The filler is mortar, cement paste, concrete or resin. The effects of erosion resistance and corrosion resistance can be further increased.
Preferably, in the double-walled integral type corrugated steel pipe described above, the unit pipe sections are steel pipes. The structural stability is strong.
The invention also provides a manufacturing process of the double-wall integral type steel corrugated pipe, which comprises the following steps:
s1, pressing the flat steel plate into a corrugated part to form a flat corrugated plate with the corrugated part and a linear part, and rolling the flat corrugated plate into a unit pipe section with a corrugated pipe section and a linear pipe section;
s2, sequentially connecting the unit pipe sections in a front-back manner, sleeving the inner wall of the next corrugated pipe section along the outer wall of the previous straight pipe section, sleeving the first corrugated inner wall at the front end of the next corrugated pipe section on the outer wall of the last corrugation at the rear end of the previous corrugated pipe section, and fixing the corrugated clamping position in the two corrugated pipe sections through bolts, rivets or welding rings to complete the connection of the two unit pipe sections;
s3, according to the method of step S2, the multiple sections of unit pipe sections are connected in sequence to form the double-wall integral steel corrugated pipe.
According to the technical scheme, the double-wall integral type steel corrugated pipe is manufactured by firstly pressing a flat steel plate into corrugations, then rolling the corrugations into unit pipe sections, and finally sleeving the unit pipe sections to form the double-wall integral type steel corrugated pipe.
Preferably, in the above manufacturing process of the double-wall integral type corrugated steel pipe, when the two sections of unit pipe sections are connected, the subsequent unit pipe section is not assembled and fixed before being sleeved to the previous unit pipe section, that is, the flat corrugated plate is only in a rolled state and is not fixedly connected, and after the sleeving is completed, the subsequent unit pipe section is assembled and fixed. The two sections of unit pipe sections can be sleeved conveniently.
Preferably, in the manufacturing process of the double-wall integral type steel corrugated pipe, a protruding arc-shaped snap ring is pressed at the other end, away from the corrugated part, of the flat steel plate, and the arc-shaped snap ring is clamped with the rear end corrugated inner wall of the next corrugated pipe section. Further improve the structural stability of the muff coupling.
In order to improve the sealing performance of the corrugated pipe, sealing rings may be added at the rolling joints of the flat corrugated plates and at the joints of the unit pipe sections.
Through the technical scheme, compared with the prior art, the invention discloses and provides the double-wall integral type steel corrugated pipe and the manufacturing process thereof, and the double-wall integral type steel corrugated pipe has the following beneficial effects:
1. the invention is formed by sleeving a plurality of sections of unit pipe sections with corrugated pipe sections and linear pipe sections to form the double-wall integral steel corrugated pipe with the corrugated outer wall and the straight pipe inner wall, thereby improving the bearing capacity, improving the service life of the smooth inner wall, and having stronger performances of scour prevention, corrosion resistance and water tightness.
2. The invention provides a manufacturing process of a double-wall integral steel corrugated pipe, which is characterized in that a flat steel plate is firstly pressed to be corrugated, then the corrugated steel plate is rolled into a unit pipe section, and finally the unit pipe section is sleeved to form the double-wall integral steel corrugated pipe.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a double-wall integral steel corrugated pipe provided by the invention;
FIG. 2 is a schematic structural view of a unit pipe section provided by the present invention;
fig. 3 is a schematic structural diagram of a flat corrugated plate provided by the invention.
Wherein:
10-flat corrugated plate;
100-unit pipe section;
1001-bellows section;
1002-a linear tube section;
1003-arc snap ring;
101-a corrugated portion;
102-straight line portion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 3, an embodiment of the present invention discloses a double-walled integral steel corrugated pipe, which includes a plurality of unit pipe sections 100 that are hermetically sleeved in sequence from front to back; the unit pipe section 100 is divided into a bellows section 1001 and a straight pipe section 1002 in the axial direction thereof, the outer diameter of the straight pipe section 1002 being equal to the minimum inner diameter of the bellows section 1001; in the front and rear two interconnected unit pipe sections 100: the first corrugated inner wall at the front end of the next corrugated pipe section 1001 is sleeved on the last corrugated outer wall at the rear end of the previous corrugated pipe section 1001, and the next corrugated pipe section 1001 is sleeved outside the previous straight pipe section 1002.
In order to further optimize the above technical solution, the corrugated clamping joints in the two sections of unit pipe sections 100 are circumferentially fixed by bolts, rivets or welding.
In order to further optimize the above technical solution, the unit pipe section 100 is rolled from a single flat corrugated plate 10; the flat corrugated plate 10 has a corrugated portion 101 corresponding to the corrugated pipe section 1001 and a linear portion 102 corresponding to the linear pipe section 1002.
In order to further optimize the above technical solution, the rolling butt joint of the flat corrugated plate 10 is fixed by bolts, anchors or welding.
In order to further optimize the above solution, in the front and rear two interconnected unit pipe sections 100: the rear end of the previous straight pipe section 1002 is provided with a raised arc-shaped snap ring 1003, and the arc-shaped snap ring 1003 is clamped with the rear end corrugated inner wall of the next corrugated pipe section 1001.
In order to further optimize the above solution, in the front and rear two interconnected unit pipe sections 100: the space between the inner wall of the next bellows section 1001 and the outer wall of the previous straight section 1002 is filled with a filler.
In order to further optimize the technical scheme, the filler is mortar, cement paste, concrete or resin.
In order to further optimize the above technical solution, the unit pipe segment 100 is a steel pipe.
The manufacturing process of the double-wall integral steel corrugated pipe provided by the embodiment comprises the following steps of:
s1, pressing a flat steel plate into a corrugated part 101 to form a flat corrugated plate 10 with the corrugated part 101 and a linear part 102, and rolling the flat corrugated plate 10 into a unit pipe section 100 with a corrugated pipe section 1001 and a linear pipe section 1002;
s2, sequentially connecting the multiple sections of unit pipe sections 100 from front to back, sleeving the inner wall of the next corrugated pipe section 1001 along the outer wall of the previous straight pipe section 1002, sleeving the first corrugated inner wall at the front end of the next corrugated pipe section 1001 on the outer wall of the last corrugation at the rear end of the previous corrugated pipe section 1001, and fixing the corrugated clamping positions in the two sections of corrugated pipe sections 1001 through bolts, rivets or welding rings to complete the connection of the two sections of unit pipe sections 100;
s3, according to the method of step S2, the multi-segment unit pipe segments 100 are sequentially connected to form a double-walled integral type steel corrugated pipe.
In S1, when two unit pipe segments 100 are connected, the next unit pipe segment 100 is not assembled and fixed before being sleeved to the previous unit pipe segment 100, that is, the corrugated flat plate 10 is only in a rolled state and is not fixedly connected, and after the sleeving is completed, the next unit pipe segment 100 is assembled and fixed.
In S2, a protruding arc-shaped snap ring 1003 is pressed on the other end of the flat steel plate away from the corrugated portion 10, and the arc-shaped snap ring 1003 is engaged with the rear corrugated inner wall of the next corrugated pipe section 1001.
In order to improve the sealing performance, sealing rings may be added at the rolling joints of the corrugated flat plates 10 and the joints of the unit pipe sections 100.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A double-wall integral steel corrugated pipe is characterized by comprising a plurality of sections of unit pipe sections (100) which are sequentially sealed and sleeved from front to back; the unit pipe section (100) is divided into a corrugated pipe section (1001) and a linear pipe section (1002) along the axial direction of the unit pipe section, and the outer diameter of the linear pipe section (1002) is equal to the minimum inner diameter of the corrugated pipe section (1001); in the front and rear two interconnected unit pipe sections (100): the first corrugated inner wall at the front end of the next corrugated pipe section (1001) is sleeved on the last corrugated outer wall at the rear end of the previous corrugated pipe section (1001), and the next corrugated pipe section (1001) is sleeved on the outer side of the previous linear pipe section (1002).
2. A double-walled monolithic steel corrugated pipe according to claim 1, wherein the corrugated joints in two sections of said unit pipe section (100) are circumferentially fixed by bolts, anchors or welding.
3. A double-walled integral corrugated steel pipe according to claim 1 wherein said unit pipe segment (100) is rolled from a single flat corrugated sheet (10); the flat corrugated plate (10) has a corrugated portion (101) corresponding to the corrugated pipe section (1001) and a linear portion (102) corresponding to the linear pipe section (1002).
4. A double-walled integral corrugated steel pipe according to claim 3 wherein the coiled butt joints of the flat corrugated plates (10) are secured by bolts, anchors or welding.
5. A double-walled integral corrugated steel pipe according to any one of claims 1 to 4, wherein in front and rear two of said unit pipe sections (100) connected to each other: the rear end of the former straight pipe section (1002) is provided with a raised arc-shaped snap ring (1003), and the arc-shaped snap ring (1003) is connected with the corrugated inner wall of the rear end of the latter corrugated pipe section (1001) in a clamped mode.
6. A double-walled integral type corrugated steel pipe according to claim 1, wherein in front and rear two of said unit pipe sections (100) connected to each other: and filling materials are injected into the gap between the inner wall of the next corrugated pipe section (1001) and the outer wall of the previous linear pipe section (1002).
7. A double-walled integral steel corrugated pipe according to claim 6, wherein said filler is mortar, or cement paste, or concrete, or resin.
8. A process for manufacturing a double-walled integral corrugated steel pipe according to any one of claims 1 to 7, comprising the steps of:
s1, pressing a flat steel plate into a corrugated part (101) to form a flat corrugated plate (10) with the corrugated part (101) and a linear part (102), and then rolling the flat corrugated plate (10) into a unit pipe section (100) with a corrugated pipe section (1001) and a linear pipe section (1002);
s2, sequentially connecting a plurality of sections of unit pipe sections (100) from front to back, sleeving the inner wall of the next corrugated pipe section (1001) along the outer wall of the previous linear pipe section (1002), sleeving the first corrugated inner wall at the front end of the next corrugated pipe section (1001) on the outer wall of the last corrugation at the rear end of the previous corrugated pipe section (1001), and fixing the corrugated clamping position in the two sections of corrugated pipe sections (1001) through bolts, rivets or welding rings to complete the connection of the two sections of unit pipe sections (100);
s3, according to the method of step S2, the multiple sections of unit pipe sections (100) are sequentially connected to form a double-wall integral steel corrugated pipe.
9. A manufacturing process of a double-wall integral type steel corrugated pipe according to claim 8, characterized in that when two sections of unit pipe sections (100) are connected, the later unit pipe section (100) is not assembled and fixed before being sleeved on the previous unit pipe section (100), and after the sleeving is completed, the later unit pipe section (100) is assembled and fixed.
10. A process for manufacturing a double-wall integral type steel corrugated pipe as claimed in claim 8, wherein a protruding arc-shaped snap ring (1003) is pressed on the other end of the flat steel plate far away from the corrugated part (10), and the arc-shaped snap ring (1003) is clamped with the rear end corrugated inner wall of the next corrugated pipe section (1001).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010291224.8A CN111486276A (en) | 2020-04-14 | 2020-04-14 | Double-wall integral steel corrugated pipe and manufacturing process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010291224.8A CN111486276A (en) | 2020-04-14 | 2020-04-14 | Double-wall integral steel corrugated pipe and manufacturing process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN111486276A true CN111486276A (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010291224.8A Pending CN111486276A (en) | 2020-04-14 | 2020-04-14 | Double-wall integral steel corrugated pipe and manufacturing process thereof |
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| CN (1) | CN111486276A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460378A (en) * | 2020-12-11 | 2021-03-09 | 江苏百事得波纹管有限公司 | Novel high-temperature-resistant and dustproof corrugated pipe |
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| CN212273294U (en) * | 2020-04-14 | 2021-01-01 | 衡水瑟林科技有限公司 | Double-wall integral steel corrugated pipe |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102086954A (en) * | 2009-12-04 | 2011-06-08 | 四川金易管业有限公司 | Steel-plastic composite pipe |
| CN103867814A (en) * | 2014-04-09 | 2014-06-18 | 张汝忠 | Corrugated steel-plastic composite pipe formed by steel belts with holes or grooves in spiral winding and welding mode and production method |
| WO2018003248A1 (en) * | 2016-06-30 | 2018-01-04 | Ｊｆｅスチール株式会社 | Electric seam welded stainless steel clad pipe and method for manufacturing same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460378A (en) * | 2020-12-11 | 2021-03-09 | 江苏百事得波纹管有限公司 | Novel high-temperature-resistant and dustproof corrugated pipe |
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