CN103727322A - Integrated stainless steel-carbon steel composite tube and preparation technology thereof - Google Patents
Integrated stainless steel-carbon steel composite tube and preparation technology thereof Download PDFInfo
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- CN103727322A CN103727322A CN201410021820.9A CN201410021820A CN103727322A CN 103727322 A CN103727322 A CN 103727322A CN 201410021820 A CN201410021820 A CN 201410021820A CN 103727322 A CN103727322 A CN 103727322A
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- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 131
- 239000010962 carbon steel Substances 0.000 title claims abstract description 131
- 239000002131 composite material Substances 0.000 title claims abstract description 65
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000010935 stainless steel Substances 0.000 claims abstract description 123
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 123
- 239000010410 layer Substances 0.000 claims abstract description 106
- 238000002156 mixing Methods 0.000 claims abstract description 31
- 239000011247 coating layer Substances 0.000 claims abstract description 22
- 238000003723 Smelting Methods 0.000 claims abstract description 7
- 238000005260 corrosion Methods 0.000 claims description 16
- 238000005098 hot rolling Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 10
- 239000003822 epoxy resin Substances 0.000 claims description 9
- 229920000647 polyepoxide Polymers 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 238000005097 cold rolling Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 238000010030 laminating Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 11
- 239000004744 fabric Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 239000002689 soil Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000005507 spraying Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 238000001723 curing Methods 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 235000012206 bottled water Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006334 epoxy coating Polymers 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- -1 wherein Substances 0.000 description 1
Images
Classifications
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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
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
-
- 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
- F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
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- 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
-
- 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
-
- 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
- F16L58/10—Coatings characterised by the materials used by rubber or plastics
- F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
-
- 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
- F16L59/00—Thermal insulation in general
- F16L59/02—Shape or form of insulating materials, with or without coverings integral with the insulating materials
- F16L59/029—Shape or form of insulating materials, with or without coverings integral with the insulating materials layered
-
- 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
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/075—Arrangements using an air layer or vacuum the air layer or the vacuum being delimited by longitudinal channels distributed around the circumference of a tube
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses an integrated stainless steel-carbon steel composite tube and a preparation technology thereof. The problems that a lined tube, an adhesive tube, and a base layer and a composite layer of a laminating tube are not firmly fixed, easy to layer, poor in performance and the like in the prior art are mainly solved. The integrated stainless steel-carbon steel composite tube comprises a four-layer structure, namely the stainless steel layer, a stainless steel-carbon steel mixing layer, a carbon steel layer and a coating layer are orderly arranged from inside to outside; the stainless steel-carbon steel mixing layer is of an integral structure and is made of stainless steel and carbon steel in a metallurgical smelting manner; the stainless steel layer and the stainless steel-carbon steel mixing layer are of an integral structure; the carbon steel layer and the stainless steel-carbon steel mixing layer are of an integral structure; the thickness ratio of the stainless steel layer to the carbon steel layer is 1:10. A groove is also formed in the tip of the integrated stainless steel-carbon steel composite tube, and the angle of the groove is 30-35 degrees. The integrated stainless steel-carbon steel composite tube is simple in structure, low in price and excellent in performance. Therefore, the integrated stainless steel-carbon steel composite tube is applicable to popularization and application.
Description
Technical field
The present invention relates to a kind of pipeline, specifically, relate to a kind of integral type stainless steel carbon steel composite pipe and preparation process thereof.
Background technique
In prior art, liquid conveying pipe mainly comprises following several: common ductile iron pipeline, carbon steel piping, prestressed concrete pipe road, PE pipe etc., the bearing capacity of above-mentioned pipeline, corrosion resistance, external force resistance destructiveness is all not good enough, some special delivering pipes, as: potable water delivering pipe, at present, the pollution source of potable water 90% is in pipeline self, therefore, higher to drinking the performance requirement of pipeline, although and stainless steel pipeline has higher guarantee in performance, it is with high costs, is unfavorable for long distance transportation.
Further, multiple compound steel have been developed, mainly comprise two kinds of inside bearing strip composite pipe and adhesion type composite pipes, as the publication number Chinese invention patent " composite stainless steel pipe " that is 2351647Y, it by stainless steel as outer tube, in stainless outer tube, be lined with again the internal lining pipe of being made by plastics or iron sheet, the composite stainless steel pipe of this kind of inside bearing strip combines the feature cheaply of stainless premium properties and plastics or iron sheet internal lining pipe, but, inside bearing strip composite pipe is not also suitable in bigbore pipeline transport, the composite bed of its basic unit and liner is very easily separated, welding between pipeline also bothers very much, another kind of, the Chinese invention patent that adhesion type composite pipe is CN2351272Y as publication number " composite stainless steel sheet material ", and the publication number Chinese invention patent " a kind of decorative sheet of composite stainless steel " that is CN201310168Y, its structure be mainly on the basis of corrosion resistant plate by the sheet material of compound other material of last layer of bonding mode, this is also the current main complex method of described composite sheet on the market, in addition, the multiple tube that also has a kind of double-level-metal to form by pressing, it is similar to adhesion type composite pipe, inside bearing strip composite pipe, is not suitable for equally large diameter pipeline, and being connected between composite bed and basic unit is not firm, easily departs from.
Summary of the invention
The object of the invention is to overcome above-mentioned defect, being connected firmly between a kind of simple in structure, reasonable in design, with low cost, composite bed and basic unit is provided, be especially applicable to the integral type stainless steel carbon steel composite pipe of large diameter pipeline.
Based on same inventive concept, to achieve these goals, the present invention adopts following two kinds of technological schemes:
Scheme one
Integral type stainless steel carbon steel composite pipe, comprise four-layer structure, it is followed successively by from the inside to the outside stainless steel lining, stainless steel carbon steel mixing layer, carbon steel layer, has insulation or/and the coating layer of anti-corrosion function, wherein, described stainless steel carbon steel mixing layer is structure as a whole by metallurgical smelting by stainless steel and carbon steel, and stainless steel lining and stainless steel carbon steel mixing layer, carbon steel layer and stainless steel carbon steel mixing layer are all structure as a whole; Described stainless steel lining is 1:10 with the ratio of the thickness of carbon steel layer; In this integral type stainless steel carbon steel composite pipe termination, be also provided with groove, and the angle of this groove is 30 ° to 35 °.
Further, in order to improve compressive strength of the present invention, the tortuosity of this integral type stainless steel carbon steel composite pipe is less than or equal to 0.003; Described coating layer is epoxy resin layer, PE layer or three oily two layer of cloths.Wherein term " three oily two cloth " refers on pipeline outer wall by successively smearing successively one deck oil outside interior, swathe one deck cloth, smear one deck oil again, swathe one deck cloth again, finally smearing one deck oil again, the coating layer alternately consisting of three layers of oil and two layers of cloth, oil and cloth can be selected according to actual needs.
In order further to reduce costs, guaranteeing on the basis of compressive strength of the present invention, in described carbon steel layer, be also provided with the arc-shaped cavity mating with pipeline.Meanwhile, this arc-shaped cavity also helps the inside and outside heat isolation of pipeline, is particularly useful for outdoor delivering pipe.
When shallow embedding or Pipes Buried Deep Underground, the moisture at the bottom of ground is very easily accelerated the rate of corrosion of pipeline appearance wall, therefore, the present invention on described epoxy resin layer, tubular axle combined to being provided with capillary penetrating drainage band along integral type stainless steel carbon steel.Capillary penetrating drainage band can also be got rid of the mositure absorption in pipeline soil effectively, thereby has avoided the corrosion of moisture in soil to pipeline table wall.
Scheme two
Integral type stainless steel carbon steel composite pipe, comprise four-layer structure, it is followed successively by from outside to inside stainless steel lining, stainless steel carbon steel mixing layer, carbon steel layer, has insulation or/and the coating layer of anti-corrosion function, wherein, described stainless steel carbon steel mixing layer is structure as a whole by metallurgical smelting by stainless steel and carbon steel, and stainless steel lining and stainless steel carbon steel mixing layer, carbon steel layer and stainless steel carbon steel mixing layer are all structure as a whole; Described stainless steel lining is 1:10 with the ratio of the thickness of carbon steel layer; In this integral type stainless steel carbon steel composite pipe termination, be also provided with groove, and the angle of this groove is 30 ° to 35 °.
Further, in order to improve compressive strength of the present invention, the tortuosity of this integral type stainless steel carbon steel composite pipe is less than or equal to 0.003; Described coating layer is epoxy resin layer, PE layer or three oily two layer of cloths.Wherein term " three oily two cloth " refers on pipeline outer wall by successively smearing successively one deck oil outside interior, swathe one deck cloth, smear one deck oil again, swathe one deck cloth again, finally smearing one deck oil again, the coating layer alternately consisting of three layers of oil and two layers of cloth, oil and cloth can be selected according to actual needs.
In order further to reduce costs, guaranteeing on the basis of compressive strength of the present invention, in described carbon steel layer, be also provided with the arc-shaped cavity mating with pipeline.Meanwhile, this arc-shaped cavity also helps the inside and outside heat isolation of pipeline, is particularly useful for outdoor delivering pipe.
When shallow embedding or Pipes Buried Deep Underground, the moisture at the bottom of ground is very easily accelerated the rate of corrosion of pipeline appearance wall, therefore, the present invention on described stainless steel lining, tubular axle combined to being provided with capillary penetrating drainage band along integral type stainless steel carbon steel.Capillary penetrating drainage band can also be got rid of the mositure absorption in pipeline soil effectively, thereby has avoided the corrosion of moisture in soil to pipeline table wall.
The preparation process of above-mentioned integral type stainless steel carbon steel composite pipe: (1) hot rolling; (2) dephosphorize by high pressure water; (3) rolling/laminar flow is cooling; (4) hot rolling reeling; (5) hot rolling bundling; (6) cold rolling; (7) pickling; (8) cold rolling; (9) bright annealing: (10) bright straightening; (11) skiving; (12) roll into tubulose.
When coating layer is selected epoxy resin layer, the plastic spraying of integral type stainless steel carbon steel composite pipe is as follows:
(1) pretreatment: acid washing phosphorization (rust cleaning);
(2) polishing, polishes to integral type stainless steel carbon steel composite pipe;
(3) preheating, puts into Electric heat oven by the integral type stainless steel carbon steel composite pipe of having polished, and preheating temperature is 230 ℃ to 250 ℃, one hour to two hours preheat time;
(4) spraying, the integral type stainless steel carbon steel composite pipe complete to preheating carries out epoxy powder application;
(5) solidify, after spray, heat after integral type stainless steel carbon steel composite pipe to 180 ℃, then integral type stainless steel carbon steel composite pipe is cured;
When in described step (5), solidifying temperature reaches 200 ℃, keep 15 minutes.
Compared with prior art, beneficial effect of the present invention is:
(1) the present invention simple in structure, design ingenious, cheap.
(2) the present invention is four-layer structure by piping design, be followed successively by stainless steel lining, the mixing layer of stainless steel and carbon steel, carbon steel layer, coating layer, wherein, the mixing layer of stainless steel and carbon steel is structure as a whole by metallurgical smelting, meanwhile, the mixing layer of stainless steel and carbon steel is integrally formed structure with stainless steel lining and carbon steel layer respectively again, compared to of the prior art bonding, liner and pressing, connection in the present invention between three is more firm, be difficult for departing from, and, the thickness proportion of stainless steel lining and carbon steel layer is only 1:10, with traditional cast-iron pipe, Stainless Steel Tube, PE pipe is compared, the performance of integral type stainless steel carbon steel composite pipe is more excellent, price is lower.
(3) the present invention arranges groove by the termination of pipeline, the angle of its groove is through being specifically designed to 30 ° to 35 °, the advantage of this design is, be convenient to the welding between pipeline and pipeline, meanwhile, soldering point forms attractive in appearance, complete weld seam, has avoided in existing composite pipe after pipeline and pipeline welding, easily there is slight crack, affect the attractive in appearance of pipeline.
(4) the present invention is designed to be less than or equal to 0.003 by the tortuosity of pipeline, has effectively improved the compressive strength of pipeline, has effectively guaranteed the crushing resistance of pipeline in remote pipe transportation.
(5) the present invention is further provided with capillary penetrating drainage band along pipeline axial trend, and it can also be got rid of the mositure absorption in pipeline soil effectively, thereby has avoided the corrosion of moisture in soil to pipeline table wall.
(6) the present invention offers arc-shaped cavity in carbon steel layer inside, and this arc-shaped cavity is several, and is evenly distributed in carbon steel layer, and it can completely cut off the inside and outside heat exchange of pipeline effectively, is particularly useful for outdoor pipeline transport.
(7) the present invention, by being coated with coating layer at inner-walls of duct or outer wall, has greatly improved corrosion resistance of the present invention and heat insulation property thus.
(8) the present invention compared with prior art, not only possesses novelty and creativeness, and its material is common material, cheap, possesses very high practicability and the market competitiveness, for it, applies on a large scale, has established solid foundation.
Accompanying drawing explanation
Fig. 1 is the present invention-embodiment 1 structural representation.
Fig. 2 is the sectional view of Fig. 1.
Fig. 3 is partial schematic diagram of the present invention.
Fig. 4 is the present invention-embodiment 2 structural representation.
Fig. 5 is the cost comparison diagram of conventional pipeline in the present invention and prior art.
Wherein, the corresponding title of reference character: 1-stainless steel lining, 2-stainless steel carbon steel mixing layer, 3-carbon steel layer, 4-coating layer, 5-O-ring seal, 6-arc-shaped cavity, 7-capillary penetrating drainage band.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Embodiments of the present invention include but not limited to the following example.
As shown in Figures 1 to 3, the present embodiment provides a kind of integral type stainless steel carbon steel composite pipe, this composite pipe comprises four-layer structure, it is followed successively by stainless steel lining 1 from the inside to the outside, stainless steel carbon steel mixing layer 2, carbon steel layer 3, coating layer 4, specifically, stainless steel lining is made by pure stainless steel, carbon steel layer is made by pure carbon steel material, stainless steel carbon steel mixing layer is structure as a whole by metallurgical smelting by stainless steel and carbon steel, meanwhile, the mixing layer of stainless steel and carbon steel is integrally formed structure with stainless steel lining and carbon steel layer respectively again, be that stainless steel carbon steel mixing layer consists of a part for stainless steel lining and a part for carbon steel layer fusion respectively, be that stainless steel carbon steel mixing layer consists of a part for stainless steel lining and a part for carbon steel layer fusion respectively, compared to of the prior art bonding, liner and pressing, stainless steel lining in the present embodiment, stainless steel carbon steel mixing layer, connection between carbon steel layer is more firm, be difficult for departing from, especially be applicable to the application of large diameter pipeline.
On the basis of the above, in order further to reduce costs, economize on resources, in the present embodiment, the Thickness Ratio of stainless steel lining and carbon steel layer is 1:10, be that stainless steel lining is only 1/10 of carbon steel layer, the application in the present embodiment of expensive stainless steel contains stainless bimetal well below traditional other, having realized the pipeline of thin specification makes, in the present invention and prior art, the contrast of the cost of conventional pipeline as shown in Figure 5, wherein, dotted line represents PE1000 type composite pipe, shorter solid line represents nodular cast iron, longer solid line represents a kind of integral type stainless steel carbon steel composite pipe in the present invention.
Performance of the present invention is better than conventional pipelines, and the performance comparison of itself and conventional P E pipe is as shown in following table 1 and table 2:
Table 1
Table 2
Consider welding aesthetic property and soundness between pipeline and pipeline, the present embodiment arranges groove by the termination of pipeline, the angle of its groove is through being specifically designed to 30 ° to 35 °, the advantage of this design is, is convenient to the welding between pipeline and pipeline, simultaneously, soldering point forms attractive in appearance, complete weld seam, avoided in existing composite pipe, after pipeline and pipeline welding, easily occurring slight crack, affected the attractive in appearance of pipeline.
Coating layer, has insulation or/and anti-corrosion function, and usually, coating layer is selected epoxy resin layer, PE layer or three oily two layer of cloths.
Wherein, epoxy resin layer, effect is to improve the corrosion resistance of pipeline outer wall, and its technique is as follows:
Pretreatment: acid washing phosphorization (rust cleaning);
Polishing: integral type stainless steel carbon steel composite pipe is polished, and its advantage is, makes base material inside and outside wall coating even, and good leveling property, reaches CJ/T120-2008 standard and GB/T5135.20-2010 standard;
Preheating: the integral type stainless steel carbon steel composite pipe of having polished is put into Electric heat oven and carry out preheating (about one and a half hours preheat time), preheating temperature is 230 ℃-250 ℃.
Spraying: the tubing complete to preheating carries out epoxy powder application.
Solidify: after spraying, heating integral type stainless steel carbon steel composite pipe is preheating to after 180 ℃, and the integral type stainless steel carbon steel composite pipe spraying is cured, and in solidification process, continues heating, when temperature reaches 200 ℃, keeps 15 minutes, completes curing.Its advantage is, in the time of spraying, epoxy powder does not also have complete cementing wall in or beyond integral type stainless steel carbon steel composite pipe, through halfhour pre-heat cure, make the curing agent in epoxy resin completely curing, thereby make epoxy coating adhesion stronger.
Further, in the present embodiment, the tortuosity of integral type stainless steel carbon steel composite pipe is designed to be less than or equal to 0.003, has effectively improved the compressive strength of pipeline, effectively guaranteed the crushing resistance of pipeline in remote pipe transportation.
In order further to reduce costs, guaranteeing on the basis of compressive strength of the present invention, in carbon steel layer, be also provided with the arc-shaped cavity 6 mating with pipeline, this arc-shaped cavity is conducive to the inside and outside heat isolation of pipeline, is particularly useful for outdoor delivering pipe.
When shallow embedding or Pipes Buried Deep Underground, the moisture at the bottom of ground is very easily accelerated the rate of corrosion of pipeline appearance wall, therefore, the present embodiment on coating layer, tubular axle combined to being provided with capillary penetrating drainage band 7 along integral type stainless steel carbon steel.Capillary penetrating drainage band can also be got rid of the mositure absorption in pipeline soil effectively, thereby has avoided the corrosion of moisture in soil to pipeline table wall.
---dephosphorize by high pressure water------hot rolling reeling---hot rolling bundling---cold rolling (hot rolling annealing)---pickling---cold rolling---bright annealing---bright straightening---skiving that rolling/laminar flow is cooling that in the present invention, stainless steel lining, stainless steel carbon steel are mixed into, the flow of carbon steel layer is as follows: hot rolling.Complete after above-mentioned technique, make that stainless steel lining, stainless steel carbon steel are mixed into, the semi-finished product of carbon steel layer, wherein, stainless steel lining, stainless steel carbon steel are mixed into, the innovation of the preparation of carbon steel layer is each process step flow process, and do not lie in process conditions, and the process conditions in each step are existing, and those skilled in the art can learn or reasonably derive each process conditions according to working experience, therefore, the present embodiment does not repeat.Above-mentioned semi-finished product, by rolling into tubular structure, are obtained to integral type stainless steel carbon steel composite pipe finished product.
As shown in Figure 4, the present embodiment and embodiment's 1 difference is, integral type stainless steel carbon steel composite pipe, comprise four-layer structure, it is followed successively by stainless steel lining, stainless steel carbon steel mixing layer, carbon steel layer, coating layer from outside to inside, and corresponding, coating layer is positioned at inner-walls of duct.
The present invention is not only an independent technological scheme, and the overall plan being comprised of a plurality of cases, and each embodiment is all a kind of set-up modes, and each embodiment is all one of technological schemes of the present invention.
According to above-described embodiment, just can realize well the present invention.What deserves to be explained is; under prerequisite based on above-mentioned design principle; for solving same technical problem; even if some that make on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technological scheme adopting is still the same with the present invention, therefore it also should be in protection scope of the present invention.
Claims (9)
1. integral type stainless steel carbon steel composite pipe, it is characterized in that, comprise four-layer structure, it is followed successively by from the inside to the outside stainless steel lining (1), stainless steel carbon steel mixing layer (2), carbon steel layer (3), has insulation or/and the coating layer of anti-corrosion function (4), wherein, described stainless steel carbon steel mixing layer (2) is structure as a whole by metallurgical smelting by stainless steel and carbon steel, and stainless steel lining (1) is all structure as a whole with stainless steel carbon steel mixing layer (2) with stainless steel carbon steel mixing layer (2), carbon steel layer (3); Described stainless steel lining (1) is 1:10 with the ratio of the thickness of carbon steel layer (3); In this integral type stainless steel carbon steel composite pipe termination, be also provided with groove (5), and the angle of this groove (5) is 30 ° to 35 °.
2. integral type stainless steel carbon steel composite pipe according to claim 1, is characterized in that, the tortuosity of this integral type stainless steel carbon steel composite pipe is less than or equal to 0.003; Described coating layer (4) is epoxy resin layer, PE layer or three oily two layer of cloths.
3. integral type stainless steel carbon steel composite pipe according to claim 1 and 2, is characterized in that, is also provided with the arc-shaped cavity (6) mating with pipeline in described carbon steel layer (3).
4. integral type stainless steel carbon steel composite pipe according to claim 1 and 2, is characterized in that, upper, tubular axle combined to being provided with capillary penetrating drainage band (7) along integral type stainless steel carbon steel at described coating layer (4).
5. integral type stainless steel carbon steel composite pipe, it is characterized in that, comprise four-layer structure, it is followed successively by from outside to inside stainless steel lining (1), stainless steel carbon steel mixing layer (2), carbon steel layer (3), has insulation or/and the coating layer of anti-corrosion function (4), wherein, described stainless steel carbon steel mixing layer (2) is structure as a whole by metallurgical smelting by stainless steel and carbon steel, and stainless steel lining (1) is all structure as a whole with stainless steel carbon steel mixing layer (2) with stainless steel carbon steel mixing layer (2), carbon steel layer (3); Described stainless steel lining (1) is 1:10 with the ratio of the thickness of carbon steel layer (3); In this integral type stainless steel carbon steel composite pipe termination, be also provided with groove (5), and the angle of this groove (5) is 30 ° to 35 °.
6. integral type stainless steel carbon steel composite pipe according to claim 5, is characterized in that, the tortuosity of this integral type stainless steel carbon steel composite pipe is less than or equal to 0.003; Described coating layer (4) is epoxy resin layer, PE layer or three oily two layer of cloths.
7. according to the integral type stainless steel carbon steel composite pipe described in claim 5 or 6, it is characterized in that, in described carbon steel layer (3), be also provided with the arc-shaped cavity (6) mating with pipeline.
8. according to the integral type stainless steel carbon steel composite pipe described in claim 5 or 6, it is characterized in that, upper, tubular axle combined to being provided with capillary penetrating drainage band (7) along integral type stainless steel carbon steel at described stainless steel lining (1).
9. the preparation process of the integral type stainless steel carbon steel composite pipe as described in claim 1 to 8, is characterized in that, comprises the following steps: (1) hot rolling; (2) dephosphorize by high pressure water; (3) rolling/laminar flow is cooling; (4) hot rolling reeling; (5) hot rolling bundling; (6) cold rolling; (7) pickling; (8) cold rolling; (9) bright annealing; (10) bright straightening; (11) skiving; (12) roll into pipe.
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| CN201410021820.9A CN103727322B (en) | 2013-10-18 | 2014-01-17 | Integral type stainless steel and carbon steel multiple tube and preparation technology thereof |
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| CN2013104899500 | 2013-10-18 | ||
| CN201310489950.0A CN103527866A (en) | 2013-10-18 | 2013-10-18 | Integrated stainless steel-carbon steel composite tube and preparation process and coating process thereof |
| CN201410021820.9A CN103727322B (en) | 2013-10-18 | 2014-01-17 | Integral type stainless steel and carbon steel multiple tube and preparation technology thereof |
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| CN103727322B CN103727322B (en) | 2016-06-22 |
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| CN108340129A (en) * | 2018-03-13 | 2018-07-31 | 太原科技大学 | A kind of preparation method of the stainless steel and carbon steel composite tube on the deposited side of easy welding |
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| CN104249510A (en) * | 2014-08-25 | 2014-12-31 | 常熟市董浜镇华进电器厂 | High heat efficiency electric heating tube |
| CN105499556B (en) * | 2015-12-08 | 2018-11-27 | 大连理工高邮研究院有限公司 | A kind of offshore oil and gas field seabed corrosion-resisting compound pipe |
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| CN103527866A (en) | 2014-01-22 |
| CN103727322B (en) | 2016-06-22 |
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