CN103574220A - Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof - Google Patents
Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof Download PDFInfo
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- CN103574220A CN103574220A CN201310391212.2A CN201310391212A CN103574220A CN 103574220 A CN103574220 A CN 103574220A CN 201310391212 A CN201310391212 A CN 201310391212A CN 103574220 A CN103574220 A CN 103574220A
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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
- 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
- F16L58/08—Coatings characterised by the materials used by metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/022—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using pressure fluids
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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
- F16L9/02—Rigid pipes of metal
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The invention discloses a hydraulic pressure expansion liner corrosion resistant alloy composite tube which is composed of a corrosion resistant alloy inner tube and a mild steel outer tube. The corrosion resistant alloy inner tube and the mild steel outer tube are assembled and liquid pressure is applied on the interior thereof after the assembly to cause the outer surface of the corrosion resistant alloy inner tube and the inner surface of the mild steel outer tube to be tight connected. The wall thickness of the corrosion resistant alloy inner tube is 1-4mm, and the outer diameter of the corrosion resistant alloy inner tube is 70-600mm. The wall thickness of the mild steel outer tube is 6-15mm, and the outer diameter of the mild steel outer tube is 76-610 mm. The composite tube has the beneficial effects that by adopting the method disclosed by the invention, an oil and gas gathering and transporting pipeline can be built for a severe corrosion area, and the method has no special requirements on sites and technologies, so the generalization is convenient.
Description
Technical field:
The invention belongs to oil gas conveying steel pipe manufacturing, relate to a kind of Hydraulic Expansion and close liner corrosion resistant alloy composite pipe fitting and manufacture method thereof.
Background technique:
Statistics shows, since 2000, the annual corrosion loss of China surpasses 5,000 hundred million yuan, accounts for 5% of GNP gross national product, and corrosive pipeline accounts for significant proportion therein.The experience of developed country and statistics demonstration, wherein more than 1/4th corrosions loss can be controlled by corrosion protection means.As long as take effective anticorrosive measure, just can extension device and working life of equipment, actively utilization and extention corrosion protection new equipment, new technology, new process, new material, China at least can reduce 30% of corrosion loss, and hundreds billion of units retrieve a loss.
People prevent the corrosion of fluid to pipeline by studying various technology for a long time, such as using corrosion resistant metal and nonmetallic material, be coated with, plate, ooze, serve as a contrast anti-corrosion layer in pipeline, add corrosion inhibitor etc. in fluid.The corrosion resistant alloy pipelines such as stainless steel, nickel-base alloy, titanium alloy have good antiseptic property and process industrial art performance because of it, are widely used in the corrosive atmospheres such as oil, chemical industry, ocean.But adopt single corrosion resistant alloy piping cost higher.For example, the line well head gathering line of transferring natural gas from the west to the east, because source of the gas is serious containing aggressive medium, had once adopted the two phase stainless steel material of 11 kilometers long, the gathering line that bore is 508mm, and all from external import, project total cost approximately 3.6 hundred million.
If adopt stainless steel and pipe line steel composite manufacturing steel pipe, just can solve pipe interior etching problem.Because its inwall only has very thin coating, cost is also lower.Meanwhile, outer low carbon steel or pipe line steel also can provide the required intensity of body and toughness reguirements.Stratiform structure double metallic composite material can make the very greatly different different metal of intensity, fusing point, thermal expansion coefficient difference realize combination, the advantage that integrates different materials, give full play to dissimilar material properties, greatly save rare metallic material, reduce the manufacture cost of equipment.
A few years from now on, market will increase fast to the demand of composition metal pipeline product, more than 100 ten thousand tons of steel pipes only consume petroleum in China Petroleum year, more than 100 hundred million yuan of costs, wherein more than 50% petroleum steel pipe is used substantially in strong corrosive environment, and the market capacity of petroleum industry anti-corrosion pipeline is annual over 5,000,000,000 yuan.China is a lot of containing the oil gas field of sour gas, as there are the rugged environment of many oil gas fields in deep-well, high temperature, high pressure, high corrosion in Tarim, Xinjiang, Sichuan, Central Plains, and every year need be from Japan, these high alloy materials of German import ton up to ten thousand.If employing stainless steel composite pipe, can stop import, and saves substantial contribution.
Composite bimetal pipe general design principles is that base material meets piping design allowable stress, alloy opposing corrosion or wearing and tearing etc.Its main manufacture methods is divided into metallurgy combination and two kinds of modes of mechanical bond by interface combination degree.Adopting the laminated composite plate of metallurgy combination is raw material, by the technique of welding after cold forming, manufactures layered bi-metal composite pipe, be a kind of flexibly, method cheaply.It is compound that it first carries out heat by the slab of two kinds of unlike materials with superhigh power hot rolling mill, then by UO or JCO technique, is rolled into pipe, then carries out welding of longitudinal seam.With respect to hole enlargement composite pipe and explosion clad pipe, the layered bi-metal composite pipe that adopts welding procedure to prepare, has certain superiority at the composite pipe with respect to other technique manufacture aspect post-forming process, welding and tube body performance.But because multiple layer is in steel duct, groove processing, assembling precision, welding method and welding sequence etc. in manufacture process are all had to special requirement, for different mother metals, also to select different welding consumabless simultaneously, in welding process, penetration ratio, heat input, interpass temperature etc. are all had to strict requirement, thereby manufacture processing is more difficult, productivity is very low.
Adopt welded pipe or seamless steel pipe, size is by after its coaxial assembling on request, and the composite pipe that the mode of its laminating is manufactured to internal pressurization is a kind of composite pipe of mechanical bond.This tubing manufacture method is simple, and productivity is high.Although because interface combination degree is low, make it be not suitable for hot working again, to pipe fitting without deformation requirements, in the situation without hot environment, mechanical composite tube can meet use needs completely.
The domestic research about composite pipe, mainly concentrates on small-bore composite pipe aspect, and take by hole enlargement, to explode compound etc. be Main Means.There is certain defect in the composite pipe by hole enlargement, the means such as compound of exploding, its size is also subject to certain limitation aspect tube performance and life-span.Its process limitation is larger simultaneously, and equipment and place are all had to specific (special) requirements, is not suitable for promoting.
The invention provides a kind of Hydraulic Expansion and close liner corrosion resistant alloy composite pipe fitting and manufacture method thereof, its technique is simple, to raw material without specific (special) requirements.The Composite pipe properties of preparation meets the usage requirement of seriously corroded Region of Oil-gas field gathering line.
Summary of the invention:
The invention provides a kind of Hydraulic Expansion and close liner corrosion resistant alloy composite pipe fitting and manufacture method thereof.Adopt the liner corrosion resistant alloy composite pipe fitting of the present invention's manufacture, can solve the construction needs of seriously corroded Region of Oil-gas gathering line.
The present invention selects weldless tube or the welded pipe effect raw material through being up to the standards, and according to size requirement, internal layer corrosion resistant alloy pipe external diameter is less than outer carbon steel tube internal diameter.By after the coaxial assembling of the inner and outer pipe that meets Dimensions requirement, inner and outer pipes annular space is vacuumized to rear soldering and sealing.After soldering and sealing completes, interior water filling is suppressed, pressurize certain hour to managing to adopt hydraulic press.Force value should make inner tube produce plastic deformation, and outer tube amount of deformation approaches maximum flexibility distortion.After release, composite pipe fitting is tested, and carry out secondary soldering and sealing after excising pipe end certain size, and pipe end is processed.
The technical solution adopted in the present invention is as follows:
Close a liner corrosion resistant alloy composite pipe fitting, described composite pipe fitting consists of corrosion resistant alloy inner tube and low carbon steel outer tube, the outer pipe internal surface fluid-tight engagement of corrosion resistant alloy inner tube outer surface and low carbon steel.
Described corrosion resistant alloy inner tube wall thickness is 1mm～4mm, and corrosion resistant alloy inner tube external diameter is 70mm～600mm.
Described low carbon steel outer tube wall thickness is 6mm～15mm, and low carbon steel outer tube external diameter is 76mm～610mm.
Described corrosion resistant alloy inner tube is weldless tube or welded pipe; Described low carbon steel outer tube is weldless tube or except the ERW welded pipe of inner burr.
Described corrosion resistant alloy inner tube external diameter is than the little 1mm～3mm of low carbon steel outer tube diameter.
The SMYS of described low carbon steel outer tube is 360MPa～621MPa.
Described Hydraulic Expansion closes the manufacture method of liner corrosion resistant alloy composite pipe fitting, and corrosion resistant alloy inner tube and low carbon steel outer tube are assembled, and after assembling, by apply fluid pressure to inside, makes pipe internal surface fluid-tight engagement outside corrosion resistant alloy inner tube outer surface and low carbon steel.
Corrosion resistant alloy inner tube outer surface is carried out to pickling, and the outer pipe internal surface of low carbon steel carries out shot blast; Corrosion resistant alloy inner tube is coaxially assemblied in to low carbon steel outer tube inner, after pipe end adopts MAG weldering sealing, water filling is suppressed to certain pressure, pressurize pressure release after 10 minutes again; While suppressing to internal water flooding, applied pressure value is 10MPa～70MPa.
Before exerting pressure in composite pipe fitting inside, inner and outer pipes annular space is vacuumized to processing.
After pressure release, to the excision of pipe end soldering and sealing position, will after pipe end position inner tube excision certain length, carry out again secondary soldering and sealing; Composite pipe fitting after soldering and sealing is detected with pipe end and processed.
The present technique beneficial effect of the invention is, adopts the method in the present invention, can manufacture a kind of seriously corroded Region of Oil-gas gathering line, the method to place with technology without specific (special) requirements, easily popularization.
Accompanying drawing explanation:
Fig. 1 Hydraulic Expansion closes liner corrosion resistant alloy composite pipe manufacturing process flow;
Fig. 2 pipe end cuts after inner tube certain size, and soldering and sealing front axle is to schematic cross-section;
Operative position and processing processing mode schematic diagram after the soldering and sealing of Fig. 3 pipe end and soldering and sealing;
Wherein: 1 is J type groove; 2 is excision position.
Embodiment:
Below in conjunction with accompanying drawing, the present invention is described in further detail:
Referring to Fig. 1,2 and 3, a kind of Hydraulic Expansion closes liner corrosion resistant alloy composite pipe fitting and manufacture method thereof, composite pipe fitting consists of corrosion resistant alloy inner tube and low carbon steel outer tube, after assembling, by apply fluid pressure to inside, makes inner tube outer surface and outer pipe internal surface fluid-tight engagement.
Inner tube wall thickness is 1mm～4mm, and inner tube external diameter is 70mm～600mm; Outer tube wall thickness is 6mm～15mm, and outer tube external diameter is 76mm～610mm.
Corrosion resistant alloy inner tube is weldless tube or welded pipe; Low carbon steel outer tube is weldless tube or except the ERW welded pipe of inner burr.
Inner tube external diameter is than the little 1mm～3mm of outer tube diameter.
Inner tube outer surface is carried out to pickling, and outer pipe internal surface carries out shot blast; Again inner tube is coaxially assemblied in to outer tube inside, after pipe end adopts MAG weldering sealing, water filling is suppressed to certain pressure, pressurize pressure release after 10 minutes.
Before exerting pressure in inside, inner and outer pipes annular space is vacuumized to processing.
While suppressing to internal water flooding, applied pressure value size is relevant with intensity and the size of inner and outer pipes, and different from size according to outer tube intensity, force value is 10MPa～70MPa.
After pressure release, to the excision of pipe end soldering and sealing position, will after pipe end position inner tube excision certain length, carry out again secondary soldering and sealing.
Composite pipe fitting after soldering and sealing is detected with pipe end and processed.
Outer tube material is low carbon steel, and its SMYS is 360MPa～621MPa.
The present invention carries out the preparation of steel pipe by Fig. 1 flow process.
(1) outer tube is prepared:
Scale cutting: according to size of product requirement, base tube is cut by certain length;
Inner surface inspection: close inspection base tube inner surface quality, in order to avoid there is the defect that affects inner and outer pipes bond quality;
Inner surface treatment: internal surface is carried out to Shot Blasting;
Purge is dried: internally purge outwardly oven dry rear stand-by.
(2) internal lining pipe is prepared
Tubulation: stainless steel belt is rolled into pipe, adopt TIG or Plasma Welding method to weld, strictly control weldquality and pattern, carry out if desired reconditioning processing;
Scale cutting: qualified steel pipe cuts by scale requirement after testing;
Surface treatment: Stainless Steel Tube is carried out to pickling processes, guarantee outer surface quality;
Cleaning, drying: clean steel tube surface acid solution, dry stand-by;
(3) assembling processing
Inner and outer pipes assembling: inner tube is put into outer tube, according to technological requirement, pipe end is carried out to soldering and sealing;
Hydraulic buckling: the pipe fitting assembling is carried out to water filling, and suppress expansion by designing and calculating force value, to pressurize certain hour after scheduled pressure value;
Hydrostatics testing: by standard test steel pipe withstand voltage properties;
Pipe end is processed: pipe end soldering and sealing and pipe end chamfered edge, before soldering and sealing, inner tube is excised to certain length, and then from inside, adopt special welding consumables to carry out built-up welding, make pipe end certain length scope internal and external layer reach metallurgy combination, for tube end maching and subsequent installation construction are prepared;
Dimensional gaughing and sign: check the apparent size of steel pipe, meet the laggard line identifier of standard-required.
(embodiment 1)
| Grade of steel | C | Si | Mn | P | S | Cr | Ni | Cu | Mo | Nb | V | Ti | N |
| X65 | 0.05 | 0.215 | 1.175 | 0.017 | 0.002 | 0.028 | 0.011 | 0.033 | 0.006 | 0.039 | 0.05 | 0.015 | / |
| 2205 | 0.024 | 0.572 | 1.63 | 0.009 | 0.002 | 22.8 | 5.76 | / | 3.12 | / | 0.024 | / | 0.13 |
| YS(Rt0.5)，MPa | TS，MPa | Specific elongation, % |
| 460 | 555 | 43 |
| 465 | 565 | 40 |
| 460 | 565 | 42 |
(embodiment 2)
The above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, yet not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the method for above-mentioned announcement and technology contents to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, still belong in the scope of technical solution of the present invention.
Claims (10)
1. Hydraulic Expansion closes a liner corrosion resistant alloy composite pipe fitting, it is characterized in that: described composite pipe fitting consists of corrosion resistant alloy inner tube and low carbon steel outer tube, the outer pipe internal surface fluid-tight engagement of corrosion resistant alloy inner tube outer surface and low carbon steel.
2. Hydraulic Expansion as claimed in claim 1 closes liner corrosion resistant alloy composite pipe fitting, it is characterized in that: described corrosion resistant alloy inner tube wall thickness is 1mm～4mm, and corrosion resistant alloy inner tube external diameter is 70mm～600mm.
3. Hydraulic Expansion as claimed in claim 1 closes liner corrosion resistant alloy composite pipe fitting, it is characterized in that: described low carbon steel outer tube wall thickness is 6mm～15mm, and low carbon steel outer tube external diameter is 76mm～610mm.
4. Hydraulic Expansion as claimed in claim 1 closes liner corrosion resistant alloy composite pipe fitting, it is characterized in that: described corrosion resistant alloy inner tube is weldless tube or welded pipe; Described low carbon steel outer tube is weldless tube or except the ERW welded pipe of inner burr.
5. a kind of liner corrosion resistant alloy composite pipe fitting as claimed in claim 1, is characterized in that: described corrosion resistant alloy inner tube external diameter is than the little 1mm～3mm of low carbon steel outer tube diameter.
6. Hydraulic Expansion as claimed in claim 1 closes liner corrosion resistant alloy composite pipe fitting, it is characterized in that: the SMYS of described low carbon steel outer tube is 360MPa～621MPa.
7. the manufacture method that Hydraulic Expansion closes liner corrosion resistant alloy composite pipe fitting as described in claim 1,2,3,4,5 or 6, it is characterized in that: corrosion resistant alloy inner tube and low carbon steel outer tube are assembled, after assembling, by apply fluid pressure to inside, make pipe internal surface fluid-tight engagement outside corrosion resistant alloy inner tube outer surface and low carbon steel.
8. the manufacture method that Hydraulic Expansion closes liner corrosion resistant alloy composite pipe fitting as claimed in claim 7, is characterized in that: corrosion resistant alloy inner tube outer surface is carried out to pickling, and the outer pipe internal surface of low carbon steel carries out shot blast; Corrosion resistant alloy inner tube is coaxially assemblied in to low carbon steel outer tube inner, after pipe end adopts MAG weldering sealing, water filling is suppressed to certain pressure, pressurize pressure release after 10 minutes again; While suppressing to internal water flooding, applied pressure value is 10MPa～70MPa.
9. the manufacture method that Hydraulic Expansion closes liner corrosion resistant alloy composite pipe fitting as claimed in claim 7, is characterized in that: before exerting pressure in composite pipe fitting inside, inner and outer pipes annular space is vacuumized to processing.
10. the manufacture method that Hydraulic Expansion closes liner corrosion resistant alloy composite pipe fitting as claimed in claim 7, is characterized in that: after pressure release, to the excision of pipe end soldering and sealing position, will after pipe end position inner tube excision certain length, carry out secondary soldering and sealing again; Composite pipe fitting after soldering and sealing is detected with pipe end and processed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310391212.2A CN103574220A (en) | 2013-08-31 | 2013-08-31 | Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof |
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| CN201310391212.2A CN103574220A (en) | 2013-08-31 | 2013-08-31 | Hydraulic pressure expansion liner corrosion resistant alloy composite tube and manufacturing method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104879577A (en) * | 2015-06-11 | 2015-09-02 | 马鞍山市圣火科技有限公司 | Manufacturing method of composite tube |
| CN105750832A (en) * | 2014-12-18 | 2016-07-13 | 中国石油天然气集团公司 | Production method for bimetal composite pipe |
| CN107363179A (en) * | 2017-08-07 | 2017-11-21 | 海隆管道工程技术服务有限公司 | A kind of manufacture method of lined composite steel tube |
| CN107413965A (en) * | 2017-08-07 | 2017-12-01 | 海隆管道工程技术服务有限公司 | A kind of full body chucking device |
| CN108591626A (en) * | 2018-04-02 | 2018-09-28 | 苏州柏仕非奥自动化设备科技有限公司 | A kind of processing and forming technology of carbon steel, Ni-based composite bimetal pipe part |
| CN110906069A (en) * | 2019-11-22 | 2020-03-24 | 西安向阳航天材料股份有限公司 | Manufacturing method of vacuum mechanical composite pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105750832A (en) * | 2014-12-18 | 2016-07-13 | 中国石油天然气集团公司 | Production method for bimetal composite pipe |
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| CN107413965A (en) * | 2017-08-07 | 2017-12-01 | 海隆管道工程技术服务有限公司 | A kind of full body chucking device |
| CN108591626A (en) * | 2018-04-02 | 2018-09-28 | 苏州柏仕非奥自动化设备科技有限公司 | A kind of processing and forming technology of carbon steel, Ni-based composite bimetal pipe part |
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| CN110906069B (en) * | 2019-11-22 | 2021-06-08 | 西安向阳航天材料股份有限公司 | Manufacturing method of vacuum mechanical composite pipe |
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Application publication date: 20140212 |