CN110698065A - Steel pipe with glass lining - Google Patents
Steel pipe with glass lining Download PDFInfo
- Publication number
- CN110698065A CN110698065A CN201910835392.6A CN201910835392A CN110698065A CN 110698065 A CN110698065 A CN 110698065A CN 201910835392 A CN201910835392 A CN 201910835392A CN 110698065 A CN110698065 A CN 110698065A
- Authority
- CN
- China
- Prior art keywords
- steel pipe
- glass
- lined
- lined steel
- layer
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23D—ENAMELLING OF, OR APPLYING A VITREOUS LAYER TO, METALS
- C23D5/00—Coating with enamels or vitreous layers
-
- 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
-
- 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
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C2207/00—Compositions specially applicable for the manufacture of vitreous enamels
- C03C2207/04—Compositions specially applicable for the manufacture of vitreous enamels for steel
Abstract
The invention provides a glass-lined steel pipe which at least comprises a steel pipe base body and a glass layer combined with the steel pipe base body, wherein the glass layer contains diboron trioxide, and the mass percentage of the diboron trioxide is 15% -20%. The glass layer of the glass-lined steel pipe provided by the invention has few bubbles and strong adhesive force.
Description
Technical Field
The invention relates to a composite material, in particular to a glass-lined steel pipe.
Background
The current compounding methods of metal materials and inorganic non-metal materials mainly comprise a self-propagating high-temperature synthesis method, a thermal spraying method, physical vapor deposition, chemical vapor deposition, enamel and the like.
The self-propagating high-temperature synthesis method is a new process for preparing boride, carbide, nitride, silicide and intermetallic compound materials by maintaining self-propagation of combustion waves by using an exothermic reaction between raw materials, and was originally invented by a.g. merzhanov et al, russian chemico-physical research institute. Since the self-propagating high-temperature synthesis technology is generated, the foreign countries have made great progress on material preparation processes and equipment, and materials such as TiB2, TiC, MoSi2 and the like are successfully produced in large quantities by adopting the technology, and the technology is the most advanced in Russia and the technology level in the United states. However, the synthesis process has serious environmental pollution, the technological process is difficult to control, the product porosity is high, the inorganic non-metallic material layer is always cracked, and the potential cracking risk exists. Therefore, the product can be used for wear resistance, but is difficult to be used for corrosion prevention.
The thermal spraying method of inorganic nonmetallic materials refers to a series of processes in which finely dispersed inorganic nonmetallic coating materials are deposited in a molten or semi-molten state on a prepared substrate surface to form a certain sprayed deposition layer. It is a technique that inorganic non-metal powder or inorganic non-metal material is heated to molten or semi-molten state by using a certain heat source (such as electric arc, plasma spraying or combustion flame, etc.), and then sprayed onto the surface of the pretreated substrate at a certain speed by means of flame flow itself or compressed air, and deposited to form surface coatings with various functions. This technique has no potential risk of cracking relative to self-propagating high temperature synthesis, but has higher porosity and very low bond strength. The corrosion resistance and the wear resistance of the material are general, and the characteristic of stronger performance of inorganic non-metallic materials is difficult to develop.
Physical vapor deposition and chemical vapor deposition can form a layer of dense inorganic non-metallic material film on the surface of the substrate, but the cost is very high, and the method is not suitable for mass production.
The enamel is inorganic glass enamel coated on the surface of a metal base blank. The enamel coating on the metal surface can prevent the metal from rusting, so that the metal can not form an oxide layer on the surface when being heated and can resist the corrosion of various liquids. The enamel product is safe, non-toxic, easy to wash and clean, and may be used widely as diet utensil and washing utensil in daily life. The enamel layer can also endow the product with beautiful appearance and serve people's life. Therefore, the enamel product has both the strength of metal, the gorgeous appearance of the enamel and the performance of chemical erosion resistance. However, enamel products are becoming more and more rare in recent years, mainly because the surface enamel layer is easily broken, cracks are easily generated when products with larger volume are made, and the like, especially when the thermal expansion coefficient of the enamel is far from that of the metal material of the base layer.
How to overcome the defects of the various schemes can form a layer of compact and uniform inorganic non-metallic material layer with high toughness and strength, particularly a ceramic layer, an enamel layer, a glass layer, a glaze layer and the like on the surface of metal, so that the inorganic non-metallic material layer has wear resistance, corrosion resistance and certain thermal shock resistance and shock resistance, and is a problem to be solved urgently.
The present application thus proposes a completely new, very economical and high-quality solution for cladding metal pipes and sheets with a layer of inorganic, non-metallic material, such as glass.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present invention provides a new composite material, and aims to solve the technical problem of lining a metal pipe with a glass layer.
In order to solve the problems, the invention adopts the technical scheme that: the glass-lined steel pipe at least comprises a steel pipe base body and a glass layer combined with the steel pipe base body, and is characterized in that the glass layer contains diboron trioxide, and the mass percentage of the diboron trioxide is 15% -20%.
Preferably, the mass percentage of the diboron trioxide is 16-17%.
Preferably, the glass layer contains sodium oxide, and the mass percentage content of the sodium oxide is less than 15%.
Preferably, the mass percentage content of the sodium oxide is 10-13%.
Preferably, the mass content of silica is 50% or more.
Preferably, the glass layer further contains calcium oxide, and the mass percentage of the calcium oxide is 5% -15%.
Preferably, the mass percentage of the calcium oxide is 8-12%.
Preferably, the method for manufacturing the glass-lined steel pipe comprises the following steps:
1) providing a steel tube substrate and a glass material;
2) and forming the glass layer by heating the steel tube substrate and the glass material and cooling, and bonding the glass layer and the steel tube substrate.
Preferably, the method for manufacturing the glass-lined steel pipe comprises the following steps: the glass material is provided in the form of a glass frit.
Preferably, the method for manufacturing the glass-lined steel pipe comprises the following steps: mixing glass powder with liquid to obtain a mixture, coating the mixture on the surface of the steel tube substrate, and drying to enable the glass powder to be adhered to the surface of the steel tube substrate.
The invention has the beneficial effects that: the glass layer of the glass-lined steel pipe prepared according to the invention has less bubbles and strong adhesive force.
The conception, the specific structure, and the technical effects produced by the present invention will be further described below to fully understand the objects, the features, and the effects of the present invention.
Detailed Description
The present invention stems from one unexpected discovery by the inventors of the present application. As described above, the inventors of the present application have tried to directly weld glass frit to the inner wall of a steel pipe and found that the method of direct welding is not at all feasible. In a test, the inventor of the application unexpectedly finds that the performance of the product obtained in the test is greatly improved compared with the performance obtained in the previous test, the number of bubbles is obviously reduced, and the bursting degree of the glass is obviously reduced. It was found that the composition of the glass frit in this test was greatly different from that of the conventional glass frit, and the boron content of the glass frit in this test was much higher than that of the conventional glass frit. Based on this finding, the inventors of the present application guessed that boron enrichment greatly helps the bonding of glass and the inner wall of the steel pipe. Then, the inventors of the present invention started to test the bonding performance between glass having various boron contents and compositions and the inner wall of the steel pipe. Furthermore, the impact resistance of the glass layer is also unexpectedly superior. The product has unexpectedly superior performance in both further corrosion and abrasion resistance tests.
After a series of tests, the applicant has found that, when the percentage by mass of boron is higher than about 20%, the glass needs to be melted at a higher temperature, even close to or exceeding the melting point of the steel, and therefore the percentage by mass of boron cannot be higher than about 20%. In a preferred embodiment, the boron content is above about 15% by weight, and more preferably, the boron content is between about 16% and about 17% by weight. When the sodium content reaches about 15% by mass or more, the thermal stability, chemical stability and mechanical strength of the glass are remarkably reduced. The sodium content is preferably about 10% to 13% by mass, so that the desired effect on the properties of the product is achieved.
The invention is further illustrated below with reference to specific examples.
Example 1
(1) One embodiment of a steel pipe made in accordance with the principles of the present invention
(a) Selection of materials
The steel pipe substrate is made of steel pipe with the inner diameter of 60mm, the steel pipe is made of high-quality carbon structural steel with the steel grade of 45, and the length of the steel pipe is about 1 m.
The anticorrosive material is glass powder with the size of more than 300 meshes, and the anticorrosive material comprises 50% of silicon dioxide, 10% of sodium oxide, 5% of potassium oxide, 10% of calcium oxide, 16% of boron trioxide and other components in percentage by mass, wherein the other components comprise aluminum oxide, magnesium oxide, barium oxide, impurities and the like. The amount of the anticorrosive material is 0.75g/cm2A meter (comprising the short tube mentioned in step (c) below).
(b) Rust and dust removal
And carrying out internal rust removal and dust removal treatment on the steel pipe. The methods of removing rust (e.g., removing rust with an iron brush) and removing dust (e.g., air blowing treatment) employed in the prior art are both applicable to this embodiment. After the rust removal treatment, the quality of the iron oxide on the inner wall of the steel pipe is not higher than 1 gram per square meter.
(c) Pipeline port pretreatment
Short pipes made of corrosion-resistant nickel-based alloy and having the same diameter and thickness as the steel pipe are provided, and the two short pipes are welded to the two ends of the steel pipe respectively. The welding methods used in the prior art are all suitable for this embodiment. The short pipes at the two ends of the steel pipe are used for welding the two steel pipes when the pipeline is laid.
(d) Coating of corrosion-resistant materials
And (3) pouring the anticorrosive material on the inner wall of the steel pipe uniformly, and scraping the anticorrosive material off the short pipe (for example, reserving 2mm) which does not need to be lined partially.
(e) Heating and cooling
Rotating the steel pipe (rotating speed is proper for promoting the anticorrosive material to be uniformly distributed on the inner wall of the steel pipe by the centrifugal force of the steel pipe), enabling the steel pipe to pass through a medium-frequency heater at a constant speed (heating the steel pipe to about 1100 ℃, moving speed is proper for melting the intermediate material and uniformly attaching the intermediate material on the pipe wall), and then naturally cooling.
(2) Comparative examples of the above examples
(a) Selection of materials
The steel pipe substrate is made of steel pipe with the inner diameter of 60mm, the steel pipe is made of high-quality carbon structural steel with the steel grade of 45, and the length of the steel pipe is about 1 m.
The anticorrosive material is glass powder with the size of more than 300 meshes, and the anticorrosive material comprises, by mass, 60% of silicon dioxide, 10% of sodium oxide, 5% of potassium oxide, 10% of calcium oxide and other components including aluminum oxide, magnesium oxide, barium oxide, impurities and the like. The amount of the anticorrosive material is 0.75g/cm2A meter (comprising the short tube mentioned in step (c) below).
(b) Rust and dust removal
And carrying out internal rust removal and dust removal treatment on the steel pipe. The methods of removing rust (e.g., removing rust with an iron brush) and removing dust (e.g., air blowing treatment) employed in the prior art are both applicable to this embodiment. After the rust removal treatment, the quality of the iron oxide on the inner wall of the steel pipe is not higher than 1 gram per square meter.
(c) Pipeline port pretreatment
Short pipes made of corrosion-resistant nickel-based alloy and having the same diameter and thickness as the steel pipe are provided, and the two short pipes are welded to the two ends of the steel pipe respectively. The welding methods used in the prior art are all suitable for this embodiment. The short pipes at the two ends of the steel pipe are used for welding the two steel pipes when the pipeline is laid.
(d) Coating of corrosion-resistant materials
And (3) pouring the anticorrosive material on the inner wall of the steel pipe uniformly, and scraping the anticorrosive material off the short pipe (for example, reserving 2mm) which does not need to be lined partially.
(e) Heating and cooling
Rotating the steel pipe (rotating speed is proper for promoting the anticorrosive material to be uniformly distributed on the inner wall of the steel pipe by the centrifugal force of the steel pipe), enabling the steel pipe to pass through a medium-frequency heater at a constant speed (heating the steel pipe to about 1100 ℃, moving speed is proper for melting the intermediate material and uniformly attaching the intermediate material on the pipe wall), and then naturally cooling.
(3) Comparison of the Performance of the products of the examples of the invention with that of the products of the comparative examples
The products of the examples of the invention and the products of the comparative examples are cut into small sections of about 10cm, and performance detection is carried out.
(a) Thickness of the layer of corrosion-resistant material
The thickness of the anticorrosive material layer was about 3mm for both the products of examples of the present invention and the products of comparative examples.
(b) Anticorrosive material layer detection
The anticorrosive material layer of the product of the comparative example is observed by naked eyes and detected by electric sparks (1-2 ten thousand volts) to find a large amount of bubbles or cracks, and a plurality of cracks appear.
The number of bubbles in the anticorrosive material layer of the product of the comparative example is slightly reduced, and the crack is greatly reduced.
(c) Adhesion test
The impact of the example products with the example products of the invention showed that the glass layers of the example products of the invention remained intact when the glass layers of the example products began to flake.
Example 2
(1) One embodiment of a steel pipe made in accordance with the principles of the present invention
(a) Selection of materials
The steel pipe substrate is made of steel pipe with the inner diameter of 60mm, the steel pipe is made of high-quality carbon structural steel with the steel grade of 45, and the length of the steel pipe is about 1 m.
The anticorrosive material is glass powder with size over 300 mesh, and contains silica 50 wt%, sodium oxide 13 wt%, potassium oxide 5 wt%, calcium oxide 10 wt%, boron trioxide 17 wt% and other componentsThe other components comprise aluminum oxide, magnesium oxide, barium oxide, impurities and the like. The amount of the anticorrosive material is 0.75g/cm2A meter (comprising the short tube mentioned in step (c) below).
(b) Rust and dust removal
And carrying out internal rust removal and dust removal treatment on the steel pipe. The methods of removing rust (e.g., removing rust with an iron brush) and removing dust (e.g., air blowing treatment) employed in the prior art are both applicable to this embodiment. After the rust removal treatment, the quality of the iron oxide on the inner wall of the steel pipe is not higher than 1 gram per square meter.
(c) Pipeline port pretreatment
Short pipes made of corrosion-resistant nickel-based alloy and having the same diameter and thickness as the steel pipe are provided, and the two short pipes are welded to the two ends of the steel pipe respectively. The welding methods used in the prior art are all suitable for this embodiment. The short pipes at the two ends of the steel pipe are used for welding the two steel pipes when the pipeline is laid.
(d) Coating of corrosion-resistant materials
And (3) pouring the anticorrosive material on the inner wall of the steel pipe uniformly, and scraping the anticorrosive material off the short pipe (for example, reserving 2mm) which does not need to be lined partially.
(e) Heating and cooling
Rotating the steel pipe (rotating speed is proper for promoting the anticorrosive material to be uniformly distributed on the inner wall of the steel pipe by the centrifugal force of the steel pipe), enabling the steel pipe to pass through a medium-frequency heater at a constant speed (heating the steel pipe to about 1100 ℃, moving speed is proper for melting the intermediate material and uniformly attaching the intermediate material on the pipe wall), and then naturally cooling.
(2) Comparative examples of the above examples
(a) Selection of materials
The steel pipe substrate is made of steel pipe with the inner diameter of 60mm, the steel pipe is made of high-quality carbon structural steel with the steel grade of 45, and the length of the steel pipe is about 1 m.
The anticorrosive material is glass powder with size over 300 mesh, and contains silica 60 wt%, sodium oxide 13 wt%, potassium oxide 5 wt%, calcium oxide 10 wt% and other components including alumina, magnesia, barium oxide and impurityAnd the like. The amount of the anticorrosive material is 0.75g/cm2A meter (comprising the short tube mentioned in step (c) below).
(b) Rust and dust removal
And carrying out internal rust removal and dust removal treatment on the steel pipe. The methods of removing rust (e.g., removing rust with an iron brush) and removing dust (e.g., air blowing treatment) employed in the prior art are both applicable to this embodiment. After the rust removal treatment, the quality of the iron oxide on the inner wall of the steel pipe is not higher than 1 gram per square meter.
(c) Pipeline port pretreatment
Short pipes made of corrosion-resistant nickel-based alloy and having the same diameter and thickness as the steel pipe are provided, and the two short pipes are welded to the two ends of the steel pipe respectively. The welding methods used in the prior art are all suitable for this embodiment. The short pipes at the two ends of the steel pipe are used for welding the two steel pipes when the pipeline is laid.
(d) Coating of corrosion-resistant materials
And (3) pouring the anticorrosive material on the inner wall of the steel pipe uniformly, and scraping the anticorrosive material off the short pipe (for example, reserving 2mm) which does not need to be lined partially.
(e) Heating and cooling
Rotating the steel pipe (rotating speed is proper for promoting the anticorrosive material to be uniformly distributed on the inner wall of the steel pipe by the centrifugal force of the steel pipe), enabling the steel pipe to pass through a medium-frequency heater at a constant speed (heating the steel pipe to about 1100 ℃, moving speed is proper for melting the intermediate material and uniformly attaching the intermediate material on the pipe wall), and then naturally cooling.
(3) Comparison of the Performance of the products of the examples of the invention with that of the products of the comparative examples
The products of the examples of the invention and the products of the comparative examples are cut into small sections of about 10cm, and performance detection is carried out.
(a) Thickness of the layer of corrosion-resistant material
The thickness of the anticorrosive material layer was about 3mm for both the products of examples of the present invention and the products of comparative examples.
(b) Anticorrosive material layer detection
The anticorrosive material layer of the product of the comparative example is observed by naked eyes and detected by electric sparks (1-2 ten thousand volts) to find a large amount of bubbles or cracks, and a plurality of cracks appear.
The number of bubbles in the anticorrosive material layer of the product of the comparative example is slightly reduced, and the crack is greatly reduced.
(c) Adhesion test
The impact of the example products with the example products of the invention showed that the glass layers of the example products of the invention remained intact when the glass layers of the example products began to flake.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. The glass-lined steel pipe at least comprises a steel pipe base body and a glass layer combined with the steel pipe base body, and is characterized in that the glass layer contains diboron trioxide, and the mass percentage of the diboron trioxide is 15% -20%.
2. The lined glass steel pipe of claim 1, wherein the boron trioxide is present in an amount of 16 to 17% by weight.
3. The glass-lined steel pipe of claim 1, wherein the glass layer comprises sodium oxide, the sodium oxide being present in an amount of less than 15% by weight.
4. The glass-lined steel pipe according to claim 1, wherein the sodium oxide is contained in an amount of 10 to 13% by mass.
5. The glass-lined steel pipe according to claim 1, wherein the silica content is 50% by mass or more.
6. The glass-lined steel pipe of claim 1, wherein the glass layer further comprises calcium oxide, and the calcium oxide is present in an amount of 5 to 15% by mass.
7. The glass-lined steel pipe according to claim 6, wherein the calcium oxide is present in an amount of 8 to 12% by mass.
8. The glass-lined steel pipe of claim 1, wherein the glass-lined steel pipe is produced by a method comprising:
1) providing a steel tube substrate and a glass material;
2) and forming the glass layer by heating the steel tube substrate and the glass material and cooling, and bonding the glass layer and the steel tube substrate.
9. The glass-lined steel pipe of claim 8, wherein the glass-lined steel pipe is produced by a method comprising: the glass material is provided in the form of a glass frit.
10. The glass-lined steel pipe of claim 9, wherein the glass-lined steel pipe is produced by a method comprising: mixing glass powder with liquid to obtain a mixture, coating the mixture on the surface of the steel tube substrate, and drying to enable the glass powder to be adhered to the surface of the steel tube substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835392.6A CN110698065A (en) | 2019-09-05 | 2019-09-05 | Steel pipe with glass lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910835392.6A CN110698065A (en) | 2019-09-05 | 2019-09-05 | Steel pipe with glass lining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110698065A true CN110698065A (en) | 2020-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910835392.6A Pending CN110698065A (en) | 2019-09-05 | 2019-09-05 | Steel pipe with glass lining |
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| CN (1) | CN110698065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111715500A (en) * | 2020-06-10 | 2020-09-29 | 华庚新材料科技(嘉兴)有限公司 | Method for manufacturing composite steel pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111715500A (en) * | 2020-06-10 | 2020-09-29 | 华庚新材料科技(嘉兴)有限公司 | Method for manufacturing composite steel pipe |
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