CN103727322B - Integral type stainless steel and carbon steel multiple tube and preparation technology thereof - Google Patents
Integral type stainless steel and carbon steel multiple tube and preparation technology thereof Download PDFInfo
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- CN103727322B CN103727322B CN201410021820.9A CN201410021820A CN103727322B CN 103727322 B CN103727322 B CN 103727322B CN 201410021820 A CN201410021820 A CN 201410021820A CN 103727322 B CN103727322 B CN 103727322B
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- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 129
- 239000010962 carbon steel Substances 0.000 title claims abstract description 129
- 239000010935 stainless steel Substances 0.000 title claims abstract description 120
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 120
- 238000005516 engineering process Methods 0.000 title claims abstract description 7
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 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
- 238000005097 cold rolling Methods 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 238000000137 annealing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000010410 layer Substances 0.000 abstract description 13
- 238000003825 pressing Methods 0.000 abstract description 4
- 238000005253 cladding Methods 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 description 11
- 239000004744 fabric Substances 0.000 description 10
- 239000003921 oil Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 239000002131 composite material Substances 0.000 description 8
- 239000002689 soil Substances 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000032258 transport Effects 0.000 description 7
- 238000005507 spraying Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 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
- 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
- 229910001141 Ductile iron Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 235000020188 drinking water Nutrition 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
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 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
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 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
- 238000002372 labelling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000011513 prestressed concrete Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
-
- 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
Landscapes
- 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 a kind of integral type stainless steel and carbon steel multiple tube and preparation technology thereof, mainly solve the connection between basic unit and the cladding of internal lining pipe of the prior art, bonding pipe, pressing pipe insecure, be easily layered, and the problem such as poor performance。This integral type stainless steel and carbon steel multiple tube includes four-layer structure, it is followed successively by stainless steel layer, stainless steel and carbon steel mixed layer, carbon steel layer, coat from the inside to the outside, wherein, described stainless steel and carbon steel mixed layer is structure as a whole by metallurgical smelting by rustless steel and carbon steel, and stainless steel layer and stainless steel and carbon steel mixed layer, carbon steel layer and stainless steel and carbon steel mixed layer are all structure as a whole；The ratio of described stainless steel layer and the thickness of carbon steel layer is 1:10；It is additionally provided with groove in this integral type stainless steel and carbon steel multiple tube termination, and the angle of this groove is 30 ° to 35 °。Present configuration is simple, cheap, function admirable, therefore, is suitable for 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 and carbon steel multiple tube and preparation technology thereof。
Background technology
In prior art, liquid conveying pipe mainly includes 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 are all not good enough, some special transport pipelines, as: drinking water transport pipeline, at present, the pollution source of drinking water 90% is in pipeline self, therefore, the performance requirement drinking pipeline is higher, although and stainless steel pipes has higher guarantee in performance, but it is with high costs, it is unfavorable for long distance transportation。
Further, have developed multiple compound steel, mainly include inside bearing strip multiple tube and adhesion type multiple tube two kinds, such as the Chinese invention patent " composite stainless steel pipe " that publication number is 2351647Y, it by rustless steel as outer tube, the internal lining pipe being made up of plastics or iron sheet it is lined with again at stainless outer tube, the composite stainless steel pipe of this kind of inside bearing strip combines the feature of the low cost of stainless premium properties and plastics or iron sheet internal lining pipe, but, inside bearing strip multiple tube is not particularly suited in bigbore pipeline transportation, the composite bed of its basic unit and liner very easily separates, welding between pipeline also bothers very much；Another kind of, adhesion type multiple tube such as publication number is the Chinese invention patent " composite stainless steel sheet material " of CN2351272Y, and the Chinese invention patent that publication number is CN201310168Y " decorative panel of a kind of composite stainless steel ", its structure is mainly on the basis of corrosion resistant plate by the sheet material of bonding mode compound other material of last layer, and this is also the main complex method of current composite plate described on the market；Additionally, also have a kind of double-level-metal compound pipeline complex pipeline by pressing, its to adhesion type multiple tube, inside bearing strip multiple tube similar, be not suitable for large diameter pipeline equally, the connection between composite bed and basic unit is not firm, easily departs from。
Summary of the invention
It is an object of the invention to overcome drawbacks described above, it is provided that a kind of simple in construction, reasonable in design, with low cost, being connected firmly between composite bed and basic unit, be especially suitable for the integral type stainless steel and carbon steel multiple tube of large diameter pipeline。
Based on same inventive concept, to achieve these goals, the present invention adopts following two technical scheme:
Scheme one
Integral type stainless steel and carbon steel multiple tube, including four-layer structure, it is followed successively by stainless steel layer, stainless steel and carbon steel mixed layer, carbon steel layer from the inside to the outside, have insulation or/and the coat of anti-corrosion function, wherein, described stainless steel and carbon steel mixed layer is structure as a whole by metallurgical smelting by rustless steel and carbon steel, and stainless steel layer and stainless steel and carbon steel mixed layer, carbon steel layer and stainless steel and carbon steel mixed layer are all structure as a whole；The ratio of described stainless steel layer and the thickness of carbon steel layer is 1:10；It is additionally provided with groove in this integral type stainless steel and carbon steel multiple tube termination, and the angle of this groove is 30 ° to 35 °。
Further, in order to improve the comprcssive strength of the present invention, the flexibility of this integral type stainless steel and carbon steel multiple tube is less than or equal to 0.003；Described coat is epoxy resin layer, PE layer or three oily two layer of cloths。Wherein term " three oily two cloth " refers to that priority is smeared one layer of oil successively, swathes one layer of cloth, smears one layer of oil again, swathes one layer of cloth again, finally smeared one layer of oil more from the inside to the outside on pipeline outer wall, the coat being alternately made up of three layers oil and two layers of cloth, oil and cloth can select according to actual needs。
In order to reduce cost further, guaranteeing on the basis of comprcssive strength of the present invention, in described carbon steel layer, it is additionally provided with the arc-shaped cavity mated with pipeline。Meanwhile, this arc-shaped cavity also helps being thermally isolated inside and outside pipeline, is particularly suited for open air transport pipeline。
When shallow embedding or Pipes Buried Deep Underground, the moisture at the bottom of ground very easily accelerates the corrosion rate 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 and carbon steel。Capillary penetrating drainage band can effectively by the moisture absorption in pipeline soil and get rid of, thus avoiding the moisture in soil corrosion to pipeline table wall。
Scheme two
Integral type stainless steel and carbon steel multiple tube, including four-layer structure, it is followed successively by stainless steel layer, stainless steel and carbon steel mixed layer, carbon steel layer from outside to inside, have insulation or/and the coat of anti-corrosion function, wherein, described stainless steel and carbon steel mixed layer is structure as a whole by metallurgical smelting by rustless steel and carbon steel, and stainless steel layer and stainless steel and carbon steel mixed layer, carbon steel layer and stainless steel and carbon steel mixed layer are all structure as a whole；The ratio of described stainless steel layer and the thickness of carbon steel layer is 1:10；It is additionally provided with groove in this integral type stainless steel and carbon steel multiple tube termination, and the angle of this groove is 30 ° to 35 °。
Further, in order to improve the comprcssive strength of the present invention, the flexibility of this integral type stainless steel and carbon steel multiple tube is less than or equal to 0.003；Described coat is epoxy resin layer, PE layer or three oily two layer of cloths。Wherein term " three oily two cloth " refers to that priority is smeared one layer of oil successively, swathes one layer of cloth, smears one layer of oil again, swathes one layer of cloth again, finally smeared one layer of oil more from the inside to the outside on pipeline outer wall, the coat being alternately made up of three layers oil and two layers of cloth, oil and cloth can select according to actual needs。
In order to reduce cost further, guaranteeing on the basis of comprcssive strength of the present invention, in described carbon steel layer, it is additionally provided with the arc-shaped cavity mated with pipeline。Meanwhile, this arc-shaped cavity also helps being thermally isolated inside and outside pipeline, is particularly suited for open air transport pipeline。
When shallow embedding or Pipes Buried Deep Underground, the moisture at the bottom of ground very easily accelerates the corrosion rate of pipeline appearance wall, therefore, the present invention on described stainless steel layer, tubular axle combined to being provided with capillary penetrating drainage band along integral type stainless steel and carbon steel。Capillary penetrating drainage band can effectively by the moisture absorption in pipeline soil and get rid of, thus avoiding the moisture in soil corrosion to pipeline table wall。
The preparation technology of above-mentioned integral type stainless steel and carbon steel multiple tube: (1) hot rolling；(2) water under high pressure dephosphorization；(3) section cooling；(4) hot rolling reeling；(5) hot rolling bundling；(6) cold rolling；(7) pickling；(8) cold rolling；(9) bright annealing: (10) light straightening；(11) surface grinding；(12) tubulose is rolled into。
When coat selects epoxy resin layer, the plastic spraying of integral type stainless steel and carbon steel multiple tube is as follows:
(1) pretreatment: acid washing phosphorization (rust cleaning)；
(2) polishing, polishes to integral type stainless steel and carbon steel multiple tube；
(3) preheating, puts in Electric heat oven by the integral type stainless steel and carbon steel multiple tube polished, and preheating temperature is 230 DEG C to 250 DEG C, one hour to two hours preheating time；
(4) spraying, carries out epoxy powder application to preheating complete integral type stainless steel and carbon steel multiple tube；
(5) solidify, after spray, heat integral type stainless steel and carbon steel multiple tube to after 180 DEG C, then integral type stainless steel and carbon steel multiple tube being solidified；
When in described step (5), solidification temperature reaches 200 DEG C, keep 15 minutes。
Compared with prior art, the beneficial effects of the present invention is:
(1) present configuration is simple, it is ingenious, cheap to design。
(2) pipe design is four-layer structure by the present invention, it is followed successively by stainless steel layer, the mixed layer of rustless steel and carbon steel, carbon steel layer, coat, wherein, the mixed layer of rustless steel and carbon steel is structure as a whole by metallurgical smelting, meanwhile, rustless steel is integrally formed structure with stainless steel layer and carbon steel layer again respectively with the mixed layer of carbon steel, bonding compared to of the prior art, liner and pressing, in the present invention, the connection between three is more firm, it is not easily disconnected from, and, the thickness proportion of stainless steel layer 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 and carbon steel multiple tube is more excellent, price is lower。
(3) termination of pipeline is arranged groove by the present invention, the angle of its groove is specially designed is 30 ° to 35 °, the advantage of this design is in that, it is easy to welding between pipeline with pipeline, meanwhile, pad constitutes attractive in appearance, complete weld seam, it is to avoid in existing multiple tube after pipeline and pipeline welding, slight crack easily occurs, affects the attractive in appearance of pipeline。
(4) flexibility of pipeline is designed as less than or equal to 0.003 by the present invention, is effectively improved the comprcssive strength of pipeline, effectively ensures pipeline crushing resistance in remote pipe transports。
(5) present invention axially moves towards along pipeline to be provided with capillary penetrating drainage band further, its can effectively by the moisture absorption in pipeline soil and get rid of, thus avoiding the moisture in soil corrosion to pipeline table wall。
(6) present invention offers arc-shaped cavity inside carbon steel layer, and this arc-shaped cavity is several, and is evenly distributed in carbon steel layer, its heat exchange that can effectively completely cut off inside and outside pipeline, is particularly suited for outdoor pipeline transportation。
(7) present invention is by being coated with coat at inner-walls of duct or outer wall, thus drastically increases corrosion resistance and the heat insulation property of the present invention。
(8) present invention is compared with prior art, not only possesses novelty and creativeness, and its material is common material, cheap, possesses very high practicality and the market competitiveness, for its large-scale popularization and application, has established solid foundation。
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention-embodiment 1。
Fig. 2 is the sectional view of Fig. 1。
Fig. 3 is partial schematic diagram of the present invention。
Fig. 4 is the structural representation of the present invention-embodiment 2。
Fig. 5 is the present invention and the Cost comparisons figure of conventional pipeline in prior art。
Wherein, the title corresponding to accompanying drawing labelling: 1-stainless steel layer, 2-stainless steel and carbon steel mixed layer, 3-carbon steel layer, 4-coat, 5-O-ring seal, 6-arc-shaped cavity, 7-capillary penetrating drainage band。
Detailed description of the invention
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。
Embodiment 1
As shown in Figures 1 to 3, present embodiments provide a kind of integral type stainless steel and carbon steel multiple tube, this multiple tube includes four-layer structure, it is followed successively by stainless steel layer 1 from the inside to the outside, stainless steel and carbon steel mixed layer 2, carbon steel layer 3, coat 4, specifically, stainless steel layer is made up of pure stainless steel, carbon steel layer is then made up of pure carbon steel material, stainless steel and carbon steel mixed layer is then structure as a whole by metallurgical smelting by rustless steel and carbon steel, meanwhile, rustless steel is integrally formed structure with stainless steel layer and carbon steel layer again respectively with the mixed layer of carbon steel, namely stainless steel and carbon steel mixed layer is made up of the part fusion of a part for stainless steel layer with carbon steel layer respectively, namely stainless steel and carbon steel mixed layer is made up of the part fusion of a part for stainless steel layer with carbon steel layer respectively, bonding compared to of the prior art, liner and pressing, stainless steel layer in the present embodiment, stainless steel and carbon steel mixed layer, connection between carbon steel layer is more firm, it is not easily disconnected from, it is especially suitable for the application of large diameter pipeline。
On the basis of the above, in order to reduce cost further, economize on resources, in the present embodiment, the thickness of stainless steel layer and carbon steel layer is than for 1:10, namely stainless steel layer is only the 1/10 of carbon steel layer, the application in the present embodiment of expensive stainless steel contains stainless bimetal well below traditional other, the pipeline achieving Thin Specs makes, the present invention is with the Cost comparisons of conventional pipeline in prior art as shown in Figure 5, wherein, dotted line represents PE1000 type multiple tube, shorter solid line represents nodular cast iron, longer solid line represents a kind of integral type stainless steel and carbon steel multiple tube in the present invention。
The performance of the present invention is better than conventional pipelines, its with shown in the tradition performance comparison such as table 1 below of PE pipe and table 2:
Table 1
Table 2
Consider to weld aesthetic property and fastness between pipeline with pipeline, the termination of pipeline is arranged groove by the present embodiment, the angle of its groove is specially designed is 30 ° to 35 °, the advantage of this design is in that, it is simple to welding between pipeline with pipeline, simultaneously, pad constitutes attractive in appearance, complete weld seam, avoid in existing multiple tube after pipeline and pipeline welding, it is easy to slight crack occurs, affects the attractive in appearance of pipeline。
Coat, has insulation or/and anti-corrosion function, and usually, coat selects epoxy resin layer, PE layer or three oily two layer of cloths。
Wherein, epoxy resin layer, effect is in that 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 and carbon steel multiple tube is polished, has an advantage in that, make base material inside and outside wall coating uniform, good leveling property, reach CJ/T120-2008 standard and GB/T5135.20-2010 standard；
Preheating: the integral type stainless steel and carbon steel multiple tube polished is put into Electric heat oven and carries out preheating (about one and a half hours preheating time), preheating temperature is 230 DEG C 250 DEG C。
Spraying: carry out epoxy powder application to preheating complete tubing。
Solidify: the integral type stainless steel and carbon steel multiple tube sprayed is solidified after being preheating to 180 DEG C by spraying post-heating integral type stainless steel and carbon steel multiple tube, in solidification process, continue heating, when temperature reaches 200 DEG C, keep 15 minutes, complete to solidify。Have an advantage in that, when spraying, epoxy powder is but without complete cementing wall in or beyond integral type stainless steel and carbon steel multiple tube, through halfhour pre-heat cure, the firming agent in epoxy resin is made to be fully cured, so that epoxy coating adhesive force is higher。
Further, the flexibility of integral type stainless steel and carbon steel multiple tube is designed as less than or equal to 0.003 by the present embodiment, is effectively improved the comprcssive strength of pipeline, effectively ensure pipeline crushing resistance in remote pipe transports。
In order to reduce cost further, guaranteeing on the basis of comprcssive strength of the present invention, be additionally provided with the arc-shaped cavity 6 mated with pipeline in carbon steel layer, this arc-shaped cavity is conducive to being thermally isolated inside and outside pipeline, is particularly suited for open air transport pipeline。
When shallow embedding or Pipes Buried Deep Underground, the moisture at the bottom of ground very easily accelerates the corrosion rate of pipeline appearance wall, therefore, the present embodiment on coat, tubular axle combined to being provided with capillary penetrating drainage band 7 along integral type stainless steel and carbon steel。Capillary penetrating drainage band can effectively by the moisture absorption in pipeline soil and get rid of, thus avoiding the moisture in soil corrosion to pipeline table wall。
In the present invention, stainless steel layer, stainless steel and carbon steel are mixed into, the technological process of production of carbon steel layer is as follows: hot rolling water under high pressure dephosphorization section cooling hot rolling reeling hot rolling bundling cold rolling (hot rolling annealing) pickling and cold-rolling bright annealing light straightening surface grinding。After completing above-mentioned technique, namely prepare stainless steel layer, stainless steel and carbon steel is mixed into, the semi-finished product of carbon steel layer, wherein, stainless steel layer, stainless steel and carbon steel are mixed into, the innovation of the preparation of carbon steel layer is in that each processing step flow process, and do not lie in process conditions, and the process conditions in each step are existing, those skilled in the art are appreciated that or reasonably derive each process conditions according to working experience, therefore, the present embodiment does not repeat。By above-mentioned semi-finished product by rolling into tubular structure, obtain integral type stainless steel and carbon steel multiple tube finished product。
Embodiment 2
As shown in Figure 4, the present embodiment difference from embodiment 1 is in that, integral type stainless steel and carbon steel multiple tube, including four-layer structure, it is followed successively by stainless steel layer, stainless steel and carbon steel mixed layer, carbon steel layer, coat from outside to inside, and accordingly, coat is positioned at inner-walls of duct。
The present invention is not only an independent technical scheme, and the overall plan being made up of multiple cases, and each embodiment is all a kind of set-up mode, and namely each embodiment is all one of technical scheme。
According to above-described embodiment, the present invention just can be realized well。What deserves to be explained is; under premise based on above-mentioned design principle; for solving same technical problem; even if some making on architecture basics disclosed in this invention are without substantial change or polishing; the essence of the technical scheme adopted is still the same with the present invention, therefore it should also be as in protection scope of the present invention。
Claims (9)
1. integral type stainless steel and carbon steel multiple tube, it is characterized in that, including four-layer structure, it is followed successively by stainless steel layer (1), stainless steel and carbon steel mixed layer (2), carbon steel layer (3) from the inside to the outside, have insulation or/and the coat (4) of anti-corrosion function, wherein, described stainless steel and carbon steel mixed layer (2) is structure as a whole by metallurgical smelting by rustless steel and carbon steel, and stainless steel layer (1) is all structure as a whole with stainless steel and carbon steel mixed layer (2) with stainless steel and carbon steel mixed layer (2), carbon steel layer (3)；The ratio of the thickness of described stainless steel layer (1) and carbon steel layer (3) is 1:10；It is additionally provided with groove (5) in this integral type stainless steel and carbon steel multiple tube termination, and the angle of this groove (5) is 30 ° to 35 °。
2. integral type stainless steel and carbon steel multiple tube according to claim 1, it is characterised in that the flexibility of this integral type stainless steel and carbon steel multiple tube is less than or equal to 0.003；Described coat (4) is epoxy resin layer, PE layer or three oily two layer of cloths。
3. integral type stainless steel and carbon steel multiple tube according to claim 1 and 2, it is characterised in that be additionally provided with the arc-shaped cavity (6) mated with pipeline in described carbon steel layer (3)。
4. integral type stainless steel and carbon steel multiple tube according to claim 1 and 2, it is characterised in that upper at described coat (4), tubular axle combined to being provided with capillary penetrating drainage band (7) along integral type stainless steel and carbon steel。
5. integral type stainless steel and carbon steel multiple tube, it is characterized in that, including four-layer structure, it is followed successively by stainless steel layer (1), stainless steel and carbon steel mixed layer (2), carbon steel layer (3) from outside to inside, have insulation or/and the coat (4) of anti-corrosion function, wherein, described stainless steel and carbon steel mixed layer (2) is structure as a whole by metallurgical smelting by rustless steel and carbon steel, and stainless steel layer (1) is all structure as a whole with stainless steel and carbon steel mixed layer (2) with stainless steel and carbon steel mixed layer (2), carbon steel layer (3)；The ratio of the thickness of described stainless steel layer (1) and carbon steel layer (3) is 1:10；It is additionally provided with groove (5) in this integral type stainless steel and carbon steel multiple tube termination, and the angle of this groove (5) is 30 ° to 35 °。
6. integral type stainless steel and carbon steel multiple tube according to claim 5, it is characterised in that the flexibility of this integral type stainless steel and carbon steel multiple tube is less than or equal to 0.003；Described coat (4) is epoxy resin layer, PE layer or three oily two layer of cloths。
7. the integral type stainless steel and carbon steel multiple tube according to claim 5 or 6, it is characterised in that be additionally provided with the arc-shaped cavity (6) mated with pipeline in described carbon steel layer (3)。
8. the integral type stainless steel and carbon steel multiple tube according to claim 5 or 6, it is characterised in that upper at described stainless steel layer (1), tubular axle combined to being provided with capillary penetrating drainage band (7) along integral type stainless steel and carbon steel。
9. the preparation technology of the integral type stainless steel and carbon steel multiple tube as described in claim 1 to 8 any one, it is characterised in that comprise the following steps: (1) hot rolling；(2) water under high pressure dephosphorization；(3) section cooling；(4) hot rolling reeling；(5) hot rolling bundling；(6) cold rolling；(7) pickling；(8) cold rolling；(9) bright annealing；(10) light straightening；(11) surface grinding；(12) pipe is rolled into。
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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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| 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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| 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 |
| 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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| CN103727322A (en) | 2014-04-16 |
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Effective date of registration: 20210520 Address after: No.7, 5th floor, unit 3, building 8, 593 Jinfu Road, Jinniu District, Chengdu, Sichuan 610000 Patentee after: Chengdu ZhongLuo Technology Co.,Ltd. Address before: No. 107, liangzhongli, Zhifang street, Jiangxia District, Wuhan City, Hubei Province, 430000 Patentee before: Yi Bo |