WO2017045426A1 - Tuyau en acier en spirale bimétallique et procédé de fabrication correspondant - Google Patents

Tuyau en acier en spirale bimétallique et procédé de fabrication correspondant Download PDF

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Publication number
WO2017045426A1
WO2017045426A1 PCT/CN2016/082936 CN2016082936W WO2017045426A1 WO 2017045426 A1 WO2017045426 A1 WO 2017045426A1 CN 2016082936 W CN2016082936 W CN 2016082936W WO 2017045426 A1 WO2017045426 A1 WO 2017045426A1
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Prior art keywords
steel strip
pipe
groove
steel
rib
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PCT/CN2016/082936
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English (en)
Chinese (zh)
Inventor
战福军
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南京联众建设工程技术有限公司
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Publication of WO2017045426A1 publication Critical patent/WO2017045426A1/fr

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    • 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
    • F16L9/16—Rigid pipes wound from sheets or strips, with or without reinforcement
    • F16L9/165—Rigid pipes wound from sheets or strips, with or without reinforcement 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
    • F16L9/00—Rigid pipes
    • F16L9/02—Rigid pipes of metal

Definitions

  • the invention discloses a steel pipe and a manufacturing method thereof, in particular to a bimetallic spiral steel pipe and a manufacturing method thereof.
  • pipelines are generally used for transportation.
  • Commonly used pipes include cement pipes, plastic pipes, ordinary carbon steel pipes, stainless steel pipes and galvanized steel pipes.
  • the cement pipe is a kind of prefabricated pipe made of cement and steel bar as the material and centrifugal force principle, but it is easy to leak and has poor internal pressure resistance; and the caliber is not large, the general caliber is 3 meters or less; each tube The length is not long, the joints are many, the joint is easy to leak, and the construction is difficult; the foundation must be made first during construction, and the construction cost is high.
  • the plastic pipe is made of plastic resin as raw material, adding stabilizer and other additives, and is extruded in the pipe making machine, which is light in weight, convenient in processing, but has small caliber, poor internal pressure bearing capacity, low mechanical strength and anti-destruction. Poor performance; not resistant to wear, not resistant to high temperatures, easy to age.
  • Ordinary carbon steel pipe is made of carbon steel.
  • the inner wall is not wear-resistant and corrosion-resistant.
  • the caliber cannot be made too much.
  • the wall thickness is greatly increased at large diameters and the cost is high. At present, some provinces in China have clearly banned it.
  • Ordinary carbon steel pipes are used in the water supply project. Stainless steel tubes are too costly.
  • the diameter of galvanized steel pipe can not be too large, and galvanizing is a polluting industry.
  • the galvanized layer is thin, generally less than 0.1mm thick, and is not resistant to abrasion and erosion.
  • existing ordinary bi-metal steel pipe the outer pipe generally adopts ordinary standard steel pipe, the wall thickness is quite thick, does not save material, the inner pipe and the outer pipe are set, easy to delaminate and fall off, and the caliber can not be too large, can only reach 1.2 meters
  • the inner tube should have sufficient thickness to support its shape, and the wall thickness is often greater than 2mm or even 4mm, which does not save material.
  • the applicant has long been committed to research in this field, and has a patent for the patent number 201410477708.6, entitled "A spiral steel pipe with a reinforcing ring and its manufacturing method", in which the reinforcing ring and the main steel pipe Can be made separately and then welded.
  • the pipe body and the reinforcing ring are two separate parts, which are integrally connected by the weld seam. When the reinforcing ring is stressed, the weld is a stress concentration zone with a hidden danger; 2.
  • the winding process In the weld the weld is in the outer side of the processing deformation zone, the weld is stretched, the deformation is large, and it is easy to crack. 3.
  • the first object of the present invention is to provide a bimetallic spiral steel pipe having a large diameter, high strength, improved corrosion resistance and wear resistance;
  • a second object of the present invention is to provide a method of producing the steel pipe.
  • the steel pipe according to the present invention comprises a pipe body, and the surface of the pipe body extends outward to form a convex rib spirally disposed along the outer wall of the pipe, the convex rib forms a groove with the pipe body, and is provided with a cover covering the concave An auxiliary inner steel strip of the groove, a hollow cavity formed between the groove and the auxiliary inner steel strip, and the hollow cavity is filled with concrete.
  • the material of the steel pipe body is carbon steel;
  • the auxiliary inner steel strip can cover the entire inner wall of the pipe, and can also cover part of the inner wall of the pipe;
  • the auxiliary inner steel strip can be selected from special alloy steel, stainless steel, wear-resistant steel, aluminum or Copper, etc., can improve the corrosion resistance of the inner wall of the pipe, and at the same time, the thickness of the main steel can be reduced, and the material cost is reduced.
  • a sealing steel strip for sealing the groove notch is also provided between the auxiliary inner steel strip and the groove.
  • Another steel pipe of the present invention comprises a pipe body, and the surface of the pipe body extends outward to form a rib arranged spirally along the outer wall of the pipe, the pipe body and the rib form a groove, and the groove is provided to block the groove.
  • the rib has a cross section of an omega shape, a groove shape, a wave shape, a semicircular shape, a parabolic shape or a trapezoidal shape.
  • the pipe body is formed by a main steel strip having at least one row of ribs on one side, a groove corresponding to the other surface, and an auxiliary inner steel strip for covering the groove notch.
  • the auxiliary inner steel strip enhances the delivery force of the main steel strip and avoids deformation of the steel strip during winding.
  • the manufacturing method of the bimetallic spiral steel pipe of the present invention comprises the following steps:
  • the main steel strip has a first pair of sides and a second pair of sides, and the main steel strip is bent into a steel strip with a rib, the ribs are spaced along the first pair of sides of the main steel strip, and the second The length of the opposite side is uniform and forms a groove with the main steel strip;
  • the auxiliary inner steel strip is attached to the groove of the main steel strip groove to form a composite steel strip, and a hollow cavity is formed between the convex rib and the auxiliary inner steel strip;
  • step C the steel strip is firstly attached to the groove of the groove of the main steel strip, and then the auxiliary inner steel strip is attached on the plugged steel strip to form a composite steel strip, and then the steel pipe is completed according to the AF step. Production.
  • the invention simultaneously applies the principle of joint force of soil and soil and the principle of concrete steel pipe, and the joint force of pipe and soil
  • the principle is that after the pipeline is buried, the upper load of the pipeline is not supported by the rigidity of the pipeline, but by the interaction between the pipeline and the surrounding earth and stone, the common force effect of the pipe and the soil is formed, and the vertical downward load is formed. It will be converted into the ring-inward pressure of the pipe wall.
  • the working principle of the concrete steel pipe is to fill the hollow steel pipe with concrete, and the superior pressure bearing capacity of the concrete and the surrounding effect of the steel pipe on the concrete greatly enhance the vertical bearing capacity of the steel pipe.
  • the invention combines ordinary carbon steel, stainless steel and concrete organic materials into one body, and fully exerts their respective characteristics and advantages, and bears different roles in the overall structure.
  • the closed shape is formed, the cross-sectional area and the moment of inertia of the steel strip are greatly increased, and the delivery is easy to realize when the coil is rounded, which is convenient for processing; most importantly, the convex rib is directly formed by the tube body, and there is no weld seam between the two. There is no stress concentration zone, no cracking hidden danger; at the same time, the rigidity of the steel pipe is improved, and it is not easy to produce large deformation in the joint force effect of the pipe and soil (that is, the pipe body and the surrounding backfill soil co-deformation), and can be well tolerated by the outside world. Dynamic loads caused by vibration, such as subways, vehicles, etc.
  • auxiliary inner steel strip which can avoid or reduce the corrosion of the main steel pipe by the fluid, the wear and the pollution of the main steel pipe to the fluid, and also the auxiliary inner steel strip is disposed inside the pipe, the main steel
  • the thickness can be reduced again, and the special inner material of the auxiliary inner steel strip greatly improves the anti-corrosion and wear resistance of the steel tube.
  • the radial and circumferential compression resistance of the inner wall of the rib is greatly improved.
  • the ribs and the concrete inside it can withstand the circumferential pressure under the action of the common force effect of the pipe and soil, further improve the overall strength of the pipe body, thereby further reducing the thickness of the main steel, further Reduce material costs.
  • the present invention has the following significant advantages: First, the rib of the outer wall of the tube is integrally formed with the tube body, and there is no weld between the two, and can withstand dynamic load when subjected to dynamic load. Fatigue; secondly, the inner wall of the pipe is provided with a special inner steel strip of specific metal material, which can improve the corrosion resistance and wear resistance of the steel pipe, avoid fluid pollution, and can reduce the thickness of the main pipe body and reduce the material cost.
  • the inner wall of the pipe can also be provided with a sealing steel strip, which forms a hollow cavity with the rib, and can be filled with concrete in the hollow cavity, and the plugged steel strip can also be used to bear the medium in the pipe to assist the inner steel strip. Pressure to prevent the inner steel strip from deforming into the groove; finally, the pipe can be used for conveying water or special media, such as water supply, drainage or corrosive medium, medium with high purity and high temperature The medium, etc., greatly reduces the manufacturing cost.
  • a sealing steel strip which forms a hollow cavity with the rib, and can be filled with concrete in the hollow cavity
  • the plugged steel strip can also be used to bear the medium in the pipe to assist the inner steel strip. Pressure to prevent the inner steel strip from deforming into the groove;
  • the pipe can be used for conveying water or special media, such as water supply, drainage or corrosive medium, medium with high purity and high temperature The medium, etc., greatly reduces the manufacturing cost.
  • Figure 1 is a schematic cross-sectional view of a main steel strip of the present invention
  • FIG. 2 is a schematic structural view of a main steel strip having a convex rib on its surface
  • Figure 3 is a schematic cross-sectional view of a main steel strip having a rib on its surface
  • Figure 4 is a schematic view showing the welding position of the main steel strip and the plugged steel strip of the present invention
  • Figure 5 is a schematic view showing the welding position of the main steel strip, the plugged steel strip and the auxiliary inner steel strip of the present invention
  • Figure 6 is a partial enlarged view of a portion A in Figure 5;
  • Figure 7 is a partial enlarged view of B in Figure 5;
  • Figure 8 is a partial enlarged view of a portion C in Figure 5;
  • Figure 9 is a schematic view showing the spiral winding process of the composite steel strip of the present invention.
  • Figure 10 is a perspective view of the spiral steel pipe of the present invention after being rolled;
  • Figure 11 is a cross-sectional view showing the pipe joint butt welding in the spiral winding process of the steel pipe of the present invention
  • Figure 12 is a partial enlarged view of the portion D in Figure 11;
  • Figure 13 is a schematic view showing the overall structure of a single-section steel pipe of the present invention.
  • Figure 14 is a schematic cross-sectional structural view of a steel pipe of the present invention.
  • Figure 15 is a schematic longitudinal sectional view of the present invention.
  • Figure 16 is a schematic cross-sectional view showing the inner wall of the present invention completely covering the inner steel strip of the auxiliary inner steel strip;
  • Figure 17 is a schematic cross-sectional view showing a portion of the inner wall portion of the present invention covering the auxiliary inner steel strip.
  • the steel pipe of the present invention comprises a pipe body 100, comprising a pipe body 100, the surface of the pipe body 100 extending outwardly to form a rib 102 spirally disposed along the outer wall of the pipe body, the pipe body 100 and the rib 102 forming a groove 103, auxiliary
  • the inner steel strip 200 covers the groove notch position, the hollow cavity 300 is formed between the groove 103 and the auxiliary inner steel strip 200, and the hollow cavity 300 is filled with the concrete 400.
  • the outer wall of the tube has a convex rib structure, which can greatly improve the moment of inertia of the main body of the main body, and the moment of inertia is much higher than that of the general reinforcement method, and the bearing capacity is improved, so that the wall thickness ratio of the main steel strip formed into the tube body is increased.
  • the wall thickness of the steel pipe is greatly reduced, and the material cost is reduced.
  • the thin steel plate can be delivered when the main steel strip is wound, and the winding process is broken.
  • the ribs may have an omega shape, a groove shape, a wavy shape, a semicircular shape, a parabolic shape or a trapezoidal shape.
  • the invention is a bimetallic spiral steel pipe, wherein the “bimetal” means that the steel pipe main body and the auxiliary inner steel strip are respectively made of two kinds of metal materials.
  • the auxiliary inner steel strip can cover the entire inner wall of the pipe or cover part of the inner wall of the pipe.
  • the inner wall of the covering part of the tube is the position of the notch covering the groove of the tube body, thereby forming a hollow cavity.
  • the auxiliary inner steel strip is made of a specific metal material including, but not limited to, special alloy steel, stainless steel, wear-resistant steel, aluminum or copper, which can improve the corrosion resistance and wear resistance of the inner wall of the pipe, and avoids fluid pollution.
  • the thickness of the main steel can be reduced again, and the material cost is reduced.
  • the auxiliary inner steel strip can also enhance the delivery force when the main steel strip is wound, and avoid deformation of the main steel strip during winding.
  • the main body of the steel pipe can be made of ordinary carbon steel with low price, and the cost can also be reduced.
  • a sealing strip 500 for sealing the groove notch is also provided between the auxiliary inner steel strip and the groove.
  • the plugged steel strip seals the groove formed on the inner wall of the main steel pipe, and on the other hand, can bear the pressure of the medium inside the pipe on the auxiliary inner steel strip, and prevents the auxiliary inner steel strip from being deformed into the groove; Including but not limited to special alloy steel, stainless steel, wear-resistant steel, aluminum or copper and other metal materials.
  • filling the hollow cavity with plain concrete or reinforced concrete can enhance the overall radial and circumferential compression resistance of the pipe body, so that the wall thickness of the main steel strip is thinner than the thickness of the general steel pipe, thereby further reducing The cost of the material.
  • the steel pipe of the invention is mostly used for conveying special media, such as corrosive medium, medium with high purity and high temperature medium, etc., can be used for water supply pipe or drainage pipe; conveying sand and dust; urban sewage and industry Sewage; chemical fluid; high temperature medium; seawater pipeline; water collection pipe; other pipelines conveying special media.
  • the lower part of the pipe (water or other media parts) is susceptible to corrosion and should be protected to form another steel pipe.
  • the steel pipe includes a pipe body, and includes a pipe body 100.
  • the surface of the pipe body 100 extends outward to form a rib 102 spirally disposed along the outer wall of the pipe body.
  • the pipe body 100 forms a groove 103 with the rib 102, and is provided with a seal. Blocking the steel strip of the groove slot, forming a hollow cavity between the groove and the plugged steel strip, and filling the hollow cavity with concrete, and at the same time, being disposed on the inner wall of the tube below the water line Auxiliary inner steel strip.
  • the invention can produce a steel pipe with a large diameter (up to a diameter of 8 meters or more); when it is used as a buried pipe, the force sharing effect of the pipe and the soil is utilized, and the concrete and the concrete inside thereof are mainly subjected to the pressure.
  • the diameter is too large (D>4m)
  • the buried soil can reach a depth of 10 to 35 meters.
  • the manufacturing method of the bimetallic spiral steel pipe of the present invention comprises the following steps:
  • the main steel strip 101 has a first pair of sides 107 and a second opposite side 108, and the main steel strip 101 is bent into a steel strip with a rib 102 along the first side of the main steel strip 101. 107 spacing, and the length of the second pair of sides 108, and forming a groove 103 with the main steel strip 101;
  • the auxiliary inner steel strip is attached to the groove of the main steel strip groove to form a composite steel strip, and a hollow cavity is formed between the convex rib and the auxiliary inner steel strip;
  • step C the steel strip is firstly attached to the groove of the groove of the main steel strip, and then the auxiliary inner steel strip is attached on the plugged steel strip to form a composite steel strip, and then the steel pipe is completed according to the AF step. Production.
  • Embodiment 1 The inner wall completely covers the tube of the auxiliary inner steel strip
  • the spiral tube forming machine adjusts to a suitable forming angle according to the diameter of the spiral welded steel pipe to be produced.
  • the main steel strip 101 is subjected to rust removal and shot peening, it is rolled into a cross-sectional shape of a downward projection (quantity and size set according to actual conditions) having a regular pitch by a forming unit, in the present invention Referring to the "bumps 102", correspondingly, grooves 103 are formed over the ribs 102, and then the weld cuts 104 are machined on both sides of the main steel strip, as shown in Figures 1-3.
  • a number of plugged steel strips 500 are placed over the notch locations of the groove 103 formed by the main steel strip, and the two are welded together to form a closed hollow cavity 300, as shown in FIG.
  • a plurality of (the number is set according to actual conditions) auxiliary inner steel strips 200 are laid side by side, and the auxiliary inner steel strip 200 is unwound, leveled and trimmed.
  • a strip of a specific metal material having a certain width after the process, a gap of 1-2 mm is left between the adjacent auxiliary inner strips 200, and at the same time, the sides of the auxiliary inner strip 200 are slightly shorter than the main strip 101. length.
  • the gas shielded welding will be used to weld the adjacent auxiliary inner steel strip 200 to the same portion of the main steel strip 101 in the same position, and the both sides of the auxiliary inner steel strip 200 are welded to the main steel strip 101, before welding, in the auxiliary.
  • the steel belt is opened with a small hole to extract the air and moisture in the interlayer, and then the small hole is sealed and smoothed, so that the rust prevention of the inner wall of the interlayer is facilitated, so that the main steel tube and the auxiliary inner steel tube are fitted together, as shown in Fig. 5-8. As shown, a composite steel strip is obtained in this way.
  • the composite steel strip formed as described above is fed to a winding mechanism 700 (1#roll 701, 2#roll 702, 3#roll 703) for spiral winding, as shown in Figs. 9-10.
  • the spiral welds 105 between the pipe joints and the pipe joints are welded by submerged arc welding, as shown in Fig. 11-12.
  • the parts to be welded between the pipe joints and the pipe joints are processed.
  • the Y-shaped groove is suitable for different welding methods for different materials.
  • the coil is formed into a bimetallic spiral welded steel pipe as shown in FIG.
  • Embodiment 2 The inner wall portion covers the pipe body of the auxiliary inner steel strip
  • the spiral tube forming machine adjusts to a suitable forming angle according to the diameter of the spiral welded steel pipe to be produced.
  • the main steel strip 101 is subjected to rust removal and shot peening, it is rolled into a certain pitch gauge through a forming unit.
  • the cross-sectional shape of the downward projection (the number and the size are set according to actual conditions) is referred to as "the rib 102" in the present invention, and correspondingly, the groove 103 is formed above the rib 102, and then in the main steel strip.
  • the welded section 104 is machined on both sides.
  • a number of the blocked steel strips 500 are laid at the notch positions of the grooves 103 of the main steel strip, and the two are welded to form a closed hollow cavity 300, thus obtaining a composite steel strip.
  • the composite steel strip formed as described above is fed to a winding mechanism 700 (1#roll 701, 2#roll 702, 3#roll 703) for spiral winding.
  • the spiral welds 105 between the pipe joints and the pipe joints are welded by submerged arc welding, and at the same time, the portion to be welded between the pipe joints and the pipe joints is processed into a Y-shaped groove, which is advantageous. Different materials use different welding methods.
  • the roll is thus formed into a bimetallic spiral welded steel pipe.
  • the auxiliary inner steel strip is then welded to the lower half of the inner wall of the steel pipe, that is, below the water level line.
  • the steel pipe spiral coil welding reaches the required length, the steel pipe is cut, and the main steel strip 101 between the rib cuts 106 at both ends of the steel pipe is welded to the gap 600 of the auxiliary inner steel strip 200.
  • the concrete or reinforced concrete is filled in from the one end of the steel pipe at the end of the steel pipe to the inside of the steel pipe until the other end of the steel pipe is out of the rib cut 106, the hollow cavity is filled with the concrete 400; finally, the bimetallic spiral steel pipe of the invention is finished, as shown in the figure 17 is shown.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention concerne un tuyau en acier en spirale bimétallique, lequel tuyau comprend un corps de tuyau (100), la surface du corps de tuyau (100) s'étendant vers l'extérieur de façon à former une nervure (102) qui est disposée en spirale autour de la paroi externe du corps de tuyau. Une rainure (103) et une bande d'acier interne auxiliaire (200) apte à recouvrir l'encoche de la rainure sont disposées sur la nervure (102) et la surface du corps de tuyau (100). Une cavité creuse (300) est formée entre la rainure (103) et la bande d'acier interne auxiliaire (200), et est remplie de béton (400). L'invention concerne également un procédé de fabrication pour un tuyau en acier en spirale bimétallique. Par le tuyau en acier en spirale bimétallique et le procédé de fabrication pour ce dernier, la nervure sur la paroi externe du corps de tuyau et le corps de tuyau sont formés d'un seul tenant, et peuvent résister à une fatigue de charge dynamique lors de la portée d'une charge dynamique ; la résistance à la corrosion et la résistance à l'usure du tuyau en acier sont améliorées ; en outre, l'épaisseur du corps principal de tuyau en acier est réduite, et les coûts en matériau sont réduits.
PCT/CN2016/082936 2015-09-18 2016-05-22 Tuyau en acier en spirale bimétallique et procédé de fabrication correspondant WO2017045426A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510600760.0 2015-09-18
CN201510600760.0A CN105156771B (zh) 2015-09-18 2015-09-18 双金属螺旋钢管及其制作方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023509326A (ja) * 2019-12-11 2023-03-08 ポスコホールディングス インコーポレーティッド スパイラルチューブ

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105156771B (zh) * 2015-09-18 2016-09-28 南京联众建设工程技术有限公司 双金属螺旋钢管及其制作方法
CN111336077A (zh) * 2020-03-23 2020-06-26 上海惠生海洋工程有限公司 一种用于温差能发电的冷水管及安装机构

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5121559A (ja) * 1974-08-19 1976-02-20 Nippon Steel Corp Rasenjohogozaitsukikinzokukanno seizohoho
KR100718869B1 (ko) * 2007-01-03 2007-05-16 대한강관 주식회사 금속 리브관
KR101206104B1 (ko) * 2012-07-13 2012-12-03 주식회사 보국산업 누수방지용 금속 리브강관
CN203404502U (zh) * 2013-06-09 2014-01-22 宝鸡石油钢管有限责任公司 螺旋缝双金属复合焊管
CN203431333U (zh) * 2013-08-23 2014-02-12 湖南双马新材料科技有限公司 一种内表面平整外表面具加强筋的双层金属管
CN104266006A (zh) * 2014-09-18 2015-01-07 南京联众建设工程技术有限公司 一种带加强环的螺旋钢管及其制作方法
CN105156771A (zh) * 2015-09-18 2015-12-16 南京联众建设工程技术有限公司 双金属螺旋钢管及其制作方法
CN205173741U (zh) * 2015-09-18 2016-04-20 南京联众建设工程技术有限公司 双金属螺旋钢管

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5121559A (ja) * 1974-08-19 1976-02-20 Nippon Steel Corp Rasenjohogozaitsukikinzokukanno seizohoho
KR100718869B1 (ko) * 2007-01-03 2007-05-16 대한강관 주식회사 금속 리브관
KR101206104B1 (ko) * 2012-07-13 2012-12-03 주식회사 보국산업 누수방지용 금속 리브강관
CN203404502U (zh) * 2013-06-09 2014-01-22 宝鸡石油钢管有限责任公司 螺旋缝双金属复合焊管
CN203431333U (zh) * 2013-08-23 2014-02-12 湖南双马新材料科技有限公司 一种内表面平整外表面具加强筋的双层金属管
CN104266006A (zh) * 2014-09-18 2015-01-07 南京联众建设工程技术有限公司 一种带加强环的螺旋钢管及其制作方法
CN105156771A (zh) * 2015-09-18 2015-12-16 南京联众建设工程技术有限公司 双金属螺旋钢管及其制作方法
CN205173741U (zh) * 2015-09-18 2016-04-20 南京联众建设工程技术有限公司 双金属螺旋钢管

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2023509326A (ja) * 2019-12-11 2023-03-08 ポスコホールディングス インコーポレーティッド スパイラルチューブ
EP4075039A4 (fr) * 2019-12-11 2023-04-05 Posco Tube en spirale
JP7496874B2 (ja) 2019-12-11 2024-06-12 ポスコホールディングス インコーポレーティッド スパイラルチューブ

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