CN2547988Y - Bimetallic multiple-unit tube - Google Patents
Bimetallic multiple-unit tube Download PDFInfo
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- CN2547988Y CN2547988Y CN 02224790 CN02224790U CN2547988Y CN 2547988 Y CN2547988 Y CN 2547988Y CN 02224790 CN02224790 CN 02224790 CN 02224790 U CN02224790 U CN 02224790U CN 2547988 Y CN2547988 Y CN 2547988Y
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Abstract
The utility model discloses a bimetallic multiple-unit tube to be used in industries such as petroleum and chemistry, which is mainly used to solve the problem of the prior bimetallic multiple-unit tube of which a parent tube and a liner do not stick to each other firmly due to a large amount of interlayer gaps between the parent tube and the liner and are easy to cause interlayer separation in a large area. The bimetallic multiple-unit tube of the utility model comprises a parent tube (101) arranged at the outer layer and a liner tube (103) at the inner layer; a braze welding layer (102) is arranged between the inner surface of the parent tube (101) and the outer surface of liner tube (103). The interlayer gap between the parent tube and liner tube is filled with the braze welding layer (102) which realizes the hundred percent and rather firm metallurgical bonding between the parent tube and the liner tube. The utility model, if various tubes made of expensive and pure noble metal materials are replaced, can greatly reduce the cost of materials and is mainly used as anti-corrosive tubes in petroleum industry, chemical industry and other industries.
Description
Technical field
The utility model relates to a kind of composite bimetal pipe that is used for industry such as oil, chemistry.
Background technique
In recent years,, want output, want benefit, increased the weight of machine utilization greatly to equipment along with China's oil refining enterprise develops to maximization, intensification direction.And China's main oilfield crude oil becomes heavy, acid number is high, sulfur-bearing is high, salinity is big, and refines import Middle East sour crude in a large number, has all increased the weight of the corrosion of oil refining apparatus, therefore equipment and pipeline has been proposed higher anti-corrosion requirement.For a long time, petrochemical system adopts stainless steel, titanium, copper and a small amount of other noble metal weldless tube in a large number, and is costly.Therefore, all kinds of composite pipes (comprising composite bimetal pipe) have obtained increasing research and application.
Composite bimetal pipe is formed with the bushing pipe that is positioned at internal layer by being positioned at outer field parent tube.The at present domestic manufacture method that generally adopts is machinery applying (as technological methodes such as hot extrusion, cold-drawn, cold spinnings); The external production technology that adopts also has the coating process of pipeline corrosion protection lining in addition to the above methods.The composite pipe of various mechanical applying manufactured, parent tube and bushing pipe do not reach firm metallurgy combination.Owing to have a large amount of interlayer gaps inevitably between parent tube and the bushing pipe, when the internal layer bushing pipe occurs between local pitting or crack, a large amount of highly corrosive medium infiltration parent tube and the bushing pipe, will form crevice corrosion, thereby quicken corrosive pipeline, and then cause pipe interlayer large size to separate.Under the temperature and pressure effect, the internal layer bushing pipe is subjected to external pressure, unstability takes place even cause the bushing pipe bulge, causes the accident of pipeline obstruction to take place.So be badly in need of replacing existing mechanical applying composite pipe with a kind of composite bimetal pipe of more high performance metallurgy combination.
At present, adopt the shooter process only to be used for the production of explosive clad plate.As metallic composite, existing explosive clad plate has been widely used in the manufacturing of petrochemical equipment.But adopt the shooter process can't produce composite bimetal pipe, corresponding composite pipe material is still blank.
In recent years, be applied to the spraying of petrochemical industry pipeline, the tubing of enamel surface modification,, have holiday, impact failure problem, do not have due anti-corrosion effect although cheap.Add that the construction requirement flange connects, and has not only increased difficulty of construction, and has improved cost.If replace, will produce huge economic benefit so, and can satisfy the requirement of industry product upgradings such as oil, chemical industry with the composite bimetal pipe material.
Summary of the invention
Technical problem to be solved in the utility model is: existing with exist between the existing parent tube of the composite bimetal pipe of various mechanical applying manufactured and the bushing pipe a large amount of interlayer gaps and the two in conjunction with insecure, in use easily cause the problem that the interlayer large size is separated and then made internal layer bushing pipe generation unstability even cause the bushing pipe bulge of managing.
For addressing the above problem, the technical solution adopted in the utility model is: a kind of composite bimetal pipe, comprise the bushing pipe that is positioned at outer field parent tube and is positioned at internal layer, and it is characterized in that: between the outer surface of the internal surface of parent tube and bushing pipe, one deck brazing layer is arranged.
Adopt the utility model, have following beneficial effect: the utility model is soldering one deck brazing layer between the outer surface of the internal surface of composite bimetal pipe parent tube and bushing pipe, brazing layer filled up the interlayer gap between parent tube and the bushing pipe and make parent tube and bushing pipe between can reach 100% metallurgy combination; Its interlayer gap is zero, and can be by the ultrasonic flaw detection check of " Nondestructing Detection of Pressure Vessels " JB4730-94 standard code.Therefore, the utility model has been eliminated existing a large amount of interlayer gap between the parent tube of existing composite bimetal pipe and the bushing pipe fully.Brazing layer forms a kind of mesosphere of metallurgy combination between the bushing pipe of the utility model bimetallic material composite pipe and parent tube; Reasonably select brazing material, can make the anti-corrosion and mechanical property of this middle close binder be higher than bushing pipe and parent tube.Therefore, the lining pipe of the utility model composite bimetal pipe to be to combine with parent tube very securely, solved effectively the existing parent tube of existing composite bimetal pipe and bushing pipe in conjunction with insecure, in use easily cause the large size of pipe interlayer to separate and then make internal layer bushing pipe generation unstability even cause series of technical such as bushing pipe bulge.
The utility model is as a kind of novel metallurgical brazing composite bimetal pipe, had both parent tube (intensity height, expense low) and both performances of bushing pipe (corrosion-resistant) and advantage.Replace the expensive all kinds of tubing of making by pure noble metal with the utility model, but cost saving is about 20%～30%, thereby reduces cost of material greatly, and save a large amount of scarce resources.Adopt argon arc welding, manual electric arc welding to tap into the requirement of capable butt welding when in addition, adopting the composite pipe of suitable solder brazing to satisfy site operation simultaneously; Can with the supporting use of existing metallic composite.In a word, the utility model is as a kind of novel anticorrosion tubing, can satisfy in the production process requirement to dielectric corrosion and temperature, pressure.Can be widely used in high temperature, high pressure, high corrosive environment in the industries such as oil, chemical industry, pharmacy, food, and the product medium requires to prevent to have good market development potential in the device and piping engineering system of iron ion pollution.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Fig. 1 is the axial cross-sectional schematic of the utility model Frequency Induction Heating brazing process and device.
Fig. 2 is the sectional view of the utility model composite bimetal pipe.
Embodiment
Shown in the sectional view of Fig. 2 the utility model composite bimetal pipe, the utility model composite bimetal pipe comprises the bushing pipe 103 that is positioned at outer field parent tube 101 and is positioned at internal layer, between the outer surface of the internal surface of parent tube 101 and bushing pipe 103 one deck brazing layer 102 is arranged.The thickness of brazing layer 102 is generally 0.03 to 0.10 millimeter.For clarity sake, the thickness to brazing layer 102 has carried out exaggerative signal.
The key step of the manufacturing process flow of the utility model composite bimetal pipe comprises successively: A, parent tube and bushing pipe raw material clean; B, bushing pipe solder are coated; C, cold drawing are compound; D, Frequency Induction Heating soldering.Can also carry out subsequent heat treatment to the composite pipe after the soldering when needing in addition.Below above each step is described in detail.A, parent tube and bushing pipe raw material clean
Before different tubing is compound, the internal surface of parent tube 101 and the outer surface of bushing pipe 103 are cleaned, remove lip-deep greasy dirt and oxide.B, bushing pipe solder are coated
After the cleaning, immediately at the coated solder of the outer surface of bushing pipe 103.C, cold drawing are compound
The Frequency Induction Heating soldering is the committed step of the utility model composite bimetal pipe manufacture process, belongs to the composite brazing of different metal materials.Mainly be used as the pipe and the pipe fitting of the melting the implemented connection of all size of under certain temperature and pressure, carrying vapour, liquid, solid aggressive medium in the industries such as oil refining, chemical industry owing to xenogenesis bimetallic material composite pipe of the present utility model and by the various pipe fitting goods of its manufacturing, so adopt the welding method of soldering; Make full use of the uniformity and stable and the flowability under melted state, wettability of solder, under capillarity, solder is filled between the dissimilar metal, finish the welding at composite pipe different metal materials interface.
The selection of solder should be according to being decided by the performance of compound xenogenesis mother metal (bushing pipe and parent tube), is in principle and is complementary by the weldering mother metal.For example, the nickel-based solder that stainless steel carbon steel adopts Ni-Cr-B-Si (nickel-chromium-boron-silicon) to be, copper-carbon steel adopts copper base solder, and titanium-carbon steel adopts silver-base solder.Solder itself also should have high-temperature oxidation resistance and corrosion resistance.More than to the intermediate frequency induction heating brazing method and given concentrated explanation to the selection of parent tube, bushing pipe and solder material by way of example.
Meet step C, the composite pipe soldering in intermediate frequency induction heating device with cold drawing after compound.
Fig. 1 is with the schematic representation of a kind of Frequency Induction Heating brazing device brazed composited tube of the present utility model (axially sectional view).This Frequency Induction Heating brazing device has a Seal cage 6, in establish heat induced circle 5; Heat induced circle 5 links to each other with medium-frequency power.Seal cage inert gas conduit 9 stretches in the Seal cage 6.Composite pipe to be welded 1 usefulness suspension rod 3 vertical liftings after cold drawing is compound pass Seal cage 6 and heat induced circle 5 in intermediate frequency induction heating device.The top of suspension rod 3 is provided with suspension hook 301, links to each other with jacking equipment.Upper and lower at Seal cage 6 housings is provided with sealing flange 401 and Seal cage lower seal flange 402 on the Seal cage around composite pipe respectively.The last lower nozzle of composite pipe is provided with upper orifice sealing flange 201 and lower nozzle sealing flange 202 around suspension rod 3 respectively.Composite pipe inert gas conduit 8 stretches into the internal cavities of composite pipe through upper orifice sealing flange 201.The purpose that above-mentioned each sealing flange is set mainly is in order to prevent the inert gas effusion.
The Frequency Induction Heating brazing process as shown in Figure 1.Feed inert gas with displaced air, so that in soldering heating process, parent tube and bushing pipe are carried out protection against oxidation to the inner chamber of cold drawing composite pipe 1 and the inside of Seal cage 6 respectively through composite pipe inert gas conduit 8 and Seal cage inert gas conduit 9.Inert gas can use nitrogen, argon gas etc.; For example feed weight percentage and be 99.999% pure argon gas, its flow control is at 6～12 liters/minute.
Start medium-frequency power then, carry out induction heating by 5 pairs of cold drawing composite pipes of heat induced circle 1.The selection of power should be decided (promptly to reach exceed the solder melting point be as the criterion for 30 ℃～60 ℃) according to the tube wall temperature that is heated composite pipe.For example (the composite pipe caliber is 159 millimeters of φ to the composite pipe of 159 * (8+3) millimeters of φ, carbon steel parent tube thickness is 8 millimeters, the stainless steel lining tube thickness is 3 millimeters, solder is the nickel-based solder of Ni-Cr-B-Si system), power selects 80～160 kilowatts, heating-up temperature is between 1040 ℃～1100 ℃, to guarantee the molten solder of solder.
When above-mentioned cold drawing composite pipe 1 is heated to brazing temperature, start jacking equipment, drive it vertically downward, the speed with 100～200 mm/min is carried out the Frequency Induction Heating soldering by heating in medium frequency induction coil 5 to the top from the pipe bottom by suspension rod 3; After finishing, soldering promptly makes the utility model composite bimetal pipe, referring to Fig. 2.Capillary gap between the internal surface of the thickness of its brazing layer 102 and the formed parent tube 101 of cold drawing compound working procedure and the outer surface of bushing pipe 103 is identical; Optimum value is 0.03～0.10 millimeter.
When the composite pipe after the soldering need be heat-treated, can carry out subsequent heat treatment.For example the soldering internal lining pipe is Austenitic Stainless Steel, when parent tube is the composite pipe of low carbon steel, at the composite pipe after the soldering below Seal cage 6 housings quenching water spray ring 7 is set.When composite pipe is carried out soldering; to the cooling (referring to Fig. 1) of spraying water from the outside by the pipeline section after 5 induction brazings of heat induced circle of inert gas shielding part; make the solutionizing of brazed composited tube inner liner stainless steel layer austenite, to guarantee stainless anti intercrystalline corrosion performance.
Adopt the composite bimetal pipe of cited above-mentioned several parent tubes, bushing pipe and solder manufacturing of the utility model specification, its technical target of the product is as follows:
Composite bimetal pipe caliber: 630 millimeters of Φ 89～Φ
Internal layer bushing pipe wall thickness: 1.5～4 millimeters
Scale (pipe range): 3～9 meters
Yield strength (σ
S): be not less than basic unit
Tensile strength (σ
b): be not less than basic unit
Elongation percentage (δ): be not less than basic unit
Binder course shear strength: 〉=147MPa
Bushing pipe intergranular corrosion (stainless steel bushing pipe): qualified (" stainless steel sulfuric acid-copper sulfate corrosion
Test method " GB4334.5-90)
Composite steel tube ultrasonic flaw detection: by " Nondestructing Detection of Pressure Vessels "
The JB4730-94 standard is carried out
Serviceability temperature :≤450 ℃
Applicating example: ordinary decompression column bottom line, atmosphere 3rd side cut, normal four lines of refining sour crude, high-acid crude oil or high-sulfur high-acid crude oil, subtract three-way, subtract high temperature, high corroded pipelines such as four lines, catalytic fractionator bottom line, recycle oil line, service condition is: temperature is not higher than 300 ℃～400 ℃, pressure is 0.1～2.5MPa, and medium is hydrocarbon+high temperature sulphur+high temperature vulcanized hydrogen+high-temperature naphthenic acid.If tubing is selected carbon steel material for use, its rate of corrosion will be above 0.5 millimeter/year, is resistant material not.If select the Cr-Mo steel material for use, its corrosion resistance does not have too big raising, belongs to not resistant material yet.If select stainless steel material for use, its Master Cost will increase greatly, and the danger of polythionic acid stress cracking takes place simultaneously in addition.Under these conditions, adopting the composite bimetal pipe (parent tube is No. 20 carbon steels, and bushing pipe is 304L or 316L stainless steel) with the utility model structure to be one selects preferably.
More than by embodiment the utility model is had been described in detail.Above-mentioned embodiment does not limit scope of the present utility model.According to actual needs, can have a variety of for parent tube, the bushing pipe of making the utility model composite bimetal pipe and the material of the solder that is complementary with it and the specification of pipe; The method that those skilled in the art needs to propose according to the utility model specification is according to specific circumstances determined concrete processing parameter, can implement the utility model fully.
The utility model composite bimetal pipe can also become various elbows, threeway, big or small first-class pipe fitting, use supporting with it as the advanced composite material (ACM) manufacturing except can be used as the tubing use.
Claims (5)
1, a kind of composite bimetal pipe comprises the bushing pipe (103) that is positioned at outer field parent tube (101) and is positioned at internal layer, it is characterized in that: between the outer surface of the internal surface of parent tube (101) and bushing pipe (103) one deck brazing layer (102) is arranged.
2, composite bimetal pipe according to claim 1 is characterized in that: the thickness of described brazing layer (102) is 0.03 millimeter to 0.10 millimeter.
3, composite bimetal pipe according to claim 1 and 2, it is characterized in that: the material of composite bimetal pipe parent tube (101) is a carbon steel, the material of bushing pipe (103) is a stainless steel, and the solder that forms brazing layer (102) is the nickel-based solder of nickel-chromium-boron-silicon system.
4, composite bimetal pipe according to claim 1 and 2 is characterized in that: the material of composite bimetal pipe parent tube (101) is a carbon steel, and the material of bushing pipe (103) is a copper, and the solder that forms brazing layer (102) is a copper base solder.
5, composite bimetal pipe according to claim 1 and 2 is characterized in that: the material of composite bimetal pipe parent tube (101) is a carbon steel, and the material of bushing pipe (103) is a titanium, and the solder that forms brazing layer (102) is a silver-base solder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02224790 CN2547988Y (en) | 2002-04-11 | 2002-04-11 | Bimetallic multiple-unit tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02224790 CN2547988Y (en) | 2002-04-11 | 2002-04-11 | Bimetallic multiple-unit tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2547988Y true CN2547988Y (en) | 2003-04-30 |
Family
ID=33702131
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02224790 Expired - Fee Related CN2547988Y (en) | 2002-04-11 | 2002-04-11 | Bimetallic multiple-unit tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2547988Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900898A (en) * | 2011-07-28 | 2013-01-30 | 霍惠春 | Preparation method of composite stainless steel oil pipe |
| CN103203598A (en) * | 2013-04-11 | 2013-07-17 | 新兴铸管股份有限公司 | Metallurgical composite bimetal seamless pipe production process |
| CN103511759A (en) * | 2012-06-28 | 2014-01-15 | 浙江兆隆合金股份有限公司 | Low-stress copper steel composite welded pipe and production method thereof |
| CN104266003A (en) * | 2014-09-11 | 2015-01-07 | 邯郸新兴特种管材有限公司 | Bimetallic composite steel pipe and production method thereof |
| CN107313724A (en) * | 2017-07-11 | 2017-11-03 | 西安向阳航天材料股份有限公司 | A kind of metallurgy type is combined oil well pipe and its manufacture method |
| CN111195658A (en) * | 2020-01-08 | 2020-05-26 | 河北金奥管业有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
| CN111716745A (en) * | 2020-06-17 | 2020-09-29 | 浙江久立特材科技股份有限公司 | Method for preparing bimetal glued composite pipe |
-
2002
- 2002-04-11 CN CN 02224790 patent/CN2547988Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900898A (en) * | 2011-07-28 | 2013-01-30 | 霍惠春 | Preparation method of composite stainless steel oil pipe |
| CN103511759A (en) * | 2012-06-28 | 2014-01-15 | 浙江兆隆合金股份有限公司 | Low-stress copper steel composite welded pipe and production method thereof |
| CN103203598A (en) * | 2013-04-11 | 2013-07-17 | 新兴铸管股份有限公司 | Metallurgical composite bimetal seamless pipe production process |
| CN104266003A (en) * | 2014-09-11 | 2015-01-07 | 邯郸新兴特种管材有限公司 | Bimetallic composite steel pipe and production method thereof |
| CN107313724A (en) * | 2017-07-11 | 2017-11-03 | 西安向阳航天材料股份有限公司 | A kind of metallurgy type is combined oil well pipe and its manufacture method |
| CN111195658A (en) * | 2020-01-08 | 2020-05-26 | 河北金奥管业有限公司 | Special-shaped rocker shaft seamless steel tube and forming method thereof |
| CN111716745A (en) * | 2020-06-17 | 2020-09-29 | 浙江久立特材科技股份有限公司 | Method for preparing bimetal glued composite pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030430 Termination date: 20110411 |