CN1822907A - Production of clad pipes - Google Patents
Production of clad pipes Download PDFInfo
- Publication number
- CN1822907A CN1822907A CNA2004800202084A CN200480020208A CN1822907A CN 1822907 A CN1822907 A CN 1822907A CN A2004800202084 A CNA2004800202084 A CN A2004800202084A CN 200480020208 A CN200480020208 A CN 200480020208A CN 1822907 A CN1822907 A CN 1822907A
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- CN
- China
- Prior art keywords
- pipe
- mentioned
- outer tube
- interior pipe
- tubular construction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/154—Making multi-wall tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/04—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes with tubes; of tubes with rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/08—Tube expanders
- B21D39/20—Tube expanders with mandrels, e.g. expandable
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
- Y10T29/49938—Radially expanding part in cavity, aperture, or hollow body
- Y10T29/4994—Radially expanding internal tube
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Branch Pipes, Bends, And The Like (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
A method of manufacturing a tubular structure such as a clad pipe (10) having inner and outer pipe sections (11, 13) with an interference fit therebetween and also a clad pipe (10) manufactured in accordance with that method. The method comprises the following steps: (a) positioning two pipe sections one within the other to provide an assembly (15) comprising the inner pipe section (11) and the outer pipe section (13); (b) radially expanding a portion of the inner pipe section (11) into engagement with the surrounding portion of the outer pipe section (13) using an expansion tool (17); (c) continuing to radially expand said portion of the inner pipe section (11) to plastically expand said portion of the inner pipe section (13) and elastically expand the surrounding portion of the outer pipe section (13); and (d) repeating steps (b) and (c) for one or more further portions of the inner pipe section (11). Because the inner pipe section (11) is radially expanded into a condition which it undergoes plastic deformation and the outer pipe section (13) is radially expanded to undergo elastic but not plastic deformation, interference between the inner and outer pipe sections is achieved due to the residual tensile stress in the outer pipe section (13) and the residual compression stress in the inner pipe section (11). The method may also involve establishing a metallurgical bond between the confronting surfaces of the two pipe sections (11, 13).
Description
Technical field
The present invention relates to the preparation of multiple tube and other tubular constructions, pipe and outer tube have interference engagement in having in this tubular construction between the two.
Background technology
Pipe and outer tube had interference engagement in a multiple tube generally comprised between them.The desired properties of pipe and outer tube in multiple tube generally combines.For example, multiple tube can have pipe and an outer tube in one, and interior pipe has special characteristic, and is for example heat-resisting and/or corrosion-resistant, and outer tube also has the characteristic of uniqueness, and for example, relative cost is lower, high strength, high ductibility and/or weldability.
Have various known manufacturing processes now and made multiple tube.A kind of known operation is to use hydraulics pressure to be applied to the inside of interior pipe, and caliber is to expanding and the outer tube CONTACT WITH FRICTION in making.This operation comprises the inner tube portion of plugging, and gives the inside input fluid (normally water) of interior pipe then, therefore it can be born and is radially expanded.But such operation has several shortcomings, and one of them is that it must discharge the air in the initial clearance space between interior pipe and outer tube.Therefore, on outer tube, just must get out steam vent.The air of collection is discharged, but because steam vent is arranged, so its part that also can cause multiple tube is scrapped.Another shortcoming is owing to guaranteeing do not have water between interior pipe and outer tube, because residual water can cause welding or other quality problems.Also having a shortcoming is that the piston that is used for sealing inner tube portion can cause multiple tube distortion or other damage.
Included pipe and outer tube is combined just they is heat-treated before of another kind of manufacturing process.Particularly, outer tube is heated, so that it can be radially expanded, interior pipe is cooled so that make its radial contraction.The interior pipe that shrinks is inserted in the outer tube of expansion, the result, and outer tube is retracted on the interior pipe, and interior tube swelling so just can form interference engagement between them to outer tube.Therefore such process is very complicated because need the equipment of heating and cooling tube altogether.
In order to overcome above-mentioned background technology and its problem of being brought and difficulty, researched and developed the present invention.
Above-mentioned discussion about background technology of the present invention is for the ease of understanding the present invention.But, should be noted in the discussion above that this explanation is not a kind of affirmation or approval, think the related material of the application be disclosed, known or before the application's priority date in the part of the domestic common practise of Australia.
Summary of the invention
According to a first aspect of the invention, provide a kind of method of making tubular construction, pipe and outer tube in tubular construction has have interference engagement between them.This method may further comprise the steps:
(e) two one of pipes are placed among another, an assembly that has comprised interior pipe and outer tube is provided;
(f) be radially expanded the part of interior pipe so that contact with the circumferential section of outer tube;
(g) continue to be radially expanded in the above-mentioned part of pipe make in the above-mentioned part of pipe produce plastic deformation, and make the circumferential section generation strain of above-mentioned outer tube;
(h) internally part of pipe or a plurality of part repeating step (b) and (c).
Because interior caliber is to expanding into the generation state of plastic deformation, and outer tube is radially expanded to the generation strain but nonplastic distortion, therefore owing to residual-tensile stress and the compressive residual stress in interior pipe in outer tube, so interference engagement is just arranged between interior pipe and outer tube.
Because the above-mentioned other parts of interior pipe continue to expand, therefore the air between interior pipe and outer tube is easy to discharge, can't have air remain in the production tube structure between pipe and the outer tube.
Best, expansion step (b) and (c) proceed to the other end from an end of assembly in order.But if necessary, order can change.For example, order can and move to an end in the middle of the assembly two ends gradually, moves to the other end again.
If necessary, the opposite face of one or two in two pipes can be strengthened mechanical bond between the two through preliminary treatment.Usually, preliminary treatment can comprise roughed surface, for example can be undertaken by the sandblast operation.
This method can also be included between the opposite face of two pipes and set up metallurgical binding.
The end of tubular construction can seal by any suitable mode, prevents that moisture and other pollutant from entering between two pipes.The end of tubular construction can also seal by the mode of for example welding.
End (preferably at two ends) at tubular construction, the end of a pipe is positioned at the inboard of another pipe corresponding end, and the residue of another pipe exposes bound fraction and is covered by a cover layer, and this cover layer forms metallurgical binding on another pipe, and forms metallurgical sealing between two pipes.
Best, interior pipe comprises an above-mentioned pipe, and outer tube comprises above-mentioned another pipe.
Best, cover layer comprises a weld overlay.
Though can adopt any suitable mode to apply expansive force, an expansion gear that has cylindrical press surface is particularly suitable for this purpose.By such device, pressure face can be determined that the expansion of expansion structure provides an expansive force can for the inner surface of interior pipe by an expansion structure.Expansion can realize by expansion fluid.
Expansion structure can be mounted on the support, and this support can move axially along the inside of interior pipe.
According to a second aspect of the invention, provide a kind of tubular construction according to the first aspect present invention manufacturing.This tubular construction can comprise a multiple tube.
According to a third aspect of the invention we, a kind of tubular construction that has interior pipe and outer tube is provided, interference engagement is arranged between them, one end of a pipe is positioned at the inboard of another pipe corresponding end, the resulting exposed parts of another pipe is covered by a weld overlay, the metallurgy sealing in cover layer is provided between pipe and the outer tube.
Best, interior pipe comprises an above-mentioned pipe, and outer tube comprises above-mentioned another pipe.
Best, such metallurgy sealing is to be positioned at each end of tubular construction.
According to a fourth aspect of the present invention, a kind of device that is used to produce the tubular construction with interior pipe and outer tube is provided, between interior pipe and the outer tube interference engagement is arranged, structure comprises a understructure and the pressure texture on understructure, understructure is used for engaging with the inner surface of interior pipe, and move along inner surface, pressure texture has been determined a cylindrical pressure surface, it can engage with the inner surface of interior pipe along with expanding.
Best, understructure comprises a roll assembly that has carried the support member of pressure texture and much carried support member, and this roll assembly can be used for rolling along the inner surface location of interior pipe and along inner surface.
For convenience, two roll assemblies are provided with at interval, and pressure texture is positioned at the centre of two roll assemblies.
Best, pressure texture comprises an expansion structure.
Description of drawings
By the present invention may be better understood to following several explanations that relate to the specific embodiments of making multiple tube.Specification can be with reference to following accompanying drawing, wherein
A kind of series of steps of multiple tube is made in Fig. 1 to 7 expression according to first embodiment;
Fig. 8 uses, has the perspective view of an expansion structure device in the pipe manufacturer process;
Fig. 9 is the perspective illustration that is used for limiting the enclosed ring that the pipe assembly is radially expanded;
Figure 10 is the end-view of ring structure;
Figure 11 is the side view of ring structure;
Figure 12 is the partial section that has represented according to one section of the multiple tube of second embodiment;
Figure 13 is the partial side view in cross section of amplifying, and has represented at the interior pipe of the multiple tube of Figure 12 and the seal between the outer tube.
The specific embodiment
Relate to a kind of multiple tube 10 of manufacturing at the first represented embodiment of Fig. 1 to 11, it comprises 11 and outer tubes 13 of pipe in.Two pipe 11,13 mutual interference engagement are to form a pipe assembly 15.This structure is that pipe 11 is as the lining of outer tube 13 in assembly 15 in making.
In this embodiment, interior pipe 11 comprises the stainless steel lining of a 1.6mm wall thickness, and outer tube 13 comprises the carbon steel pipe of a 6.35mm wall thickness.What two pipes 11,13 were represented in Fig. 1 is that interior pipe 11 inserts before the outer tubes, in Fig. 2, represent be insert after.
Before interior pipe 11 inserted outer tube 13, the contact-making surface between them (inner surface of the outer surface of interior pipe 11 and outer tube 13) process sandblast operation (for example blasting treatment) was made coarse, to obtain the SA2.5 profile.
Then a device as bloat tool 17 is inserted in the pipe assembly 15, as shown in Figure 3.Subsequently, bloat tool 17 moves along pipe assembly 15, moves to the other end from an end, carries out expansion process along pipe assembly 15, as shown in Figure 4, and will be elaborated below.Having overlappingly between each expansion step and next expansion step, normally probably is 300mm in this embodiment.
An enclosed ring 21 is along with bloat tool 17 is worked together, and closed-loop is around pipe assembly 15 location, and align with the cylindrical press surface 19 of bloat tool 17 (registration).
The internal face that is radially expanded to interior pipe 11 of the cylindrical press surface 19 of bloat tool 17 provides a radially outer power.This outside power just makes the part of the interior pipe 11 that engages with cylindrical press surface 19 outwards expand, and moves to outer tube 13 and contact.Apply outside power for continuously the part of interior pipe 11, cause its plastic deformation, cause outer tube 13 strains simultaneously.When reaching outer tube 11 elastic limits soon, just stop to expand, so the pressure face 19 of instrument 17 shrinks.Instrument 17 moves along pipe assembly 15 then, also has the overlapping of 300mm.Reexpansion operation then causes plastic deformation so that the circumferential section of interior pipe 11 expands, and assigns to cause strain with the expand circumferential part of outer tube 17 of mode similar to the above.Repeating this operation subsequently all disposes up to whole pipe assembly 15.
Because being radially expanded to, interior pipe 11 has plastic deformation, and outer tube 13 is radially expanded to elasticity but nonplastic distortion, therefore, owing to remaining tensile stress is arranged in the outer tube 13 and remaining compression stress is arranged, between interior pipe and outer tube 11,13, will there be interference in interior pipe 11.
Therefore because the various piece of interior pipe 11 is to expand in order, the air between interior pipe and outer tube 11,13 is easy to discharge, can't have air remain in the production tube assembly 15 between pipe and the outer tube.
Enclosed ring 21 is along with the pressure face 19 of bloat tool 17 moves gradually.Closed-loop 21 is in order to limit the degree that is radially expanded of outer tube 17, just can to guarantee that therefore it can not expand into the degree that produces plastic deformation.
Along with finishing of expansion process, sealed moisture and other pollutant of preventing in the end of pipe assembly 15 enters two zones between the pipe 11,13.In this embodiment, the end is to seal by a weld seam 22, as shown in Figure 5.Then, can polish weld seam 22, as shown in Figure 6, so that a finish is provided.
Finished product multiple tube 10 represents that in Fig. 7 pipe 11 and outer tube 13 in it comprises have interference engagement between them.Be an interference fit between two pipes 11,13 clamping force is provided, clamping force is owing to remaining tensile stress being arranged in outer tube 13 and having remaining compression stress to occur in interior pipe 11.
The finished product multiple tube 10 API 5LD that can meet international standards.
Enclosed ring 21 is represented in Fig. 9,10 and 11.Enclosed ring 21 comprises a sleeve 51 that can be installed to outer tube 13 outsides, is used for limiting the possible degree that is radially expanded, as mentioned above.Sleeve 51 is divided into two parts 52 and 53, to allow the sleeve expansion and to be installed on the outer tube 13.There is a locking device 55 to be used for releasedly two sleeve parts 52,53 being locked together the sleeve 51 that forms sealing.Locking device 55 comprises several clamping plate 57, and clamping plate are soldered or be fixed on by different way on two sleeve parts 52,53.Clamping plate also have hole 59, and when two sleeve parts 52,53 assembled the formation sleeve, these holes just were in alignment with each other.A lock pin 61 is accommodated in the hole of every cover alignment.Each lock pin 61 comprises lock part 63 and the compartment betwixt 65 that several axially spaced-aparts are provided with.The diameter of lock part 63 is greater than the diameter of compartment 65, and can be accommodated in the lock hole 59 two sleeve parts 52,53 are fixed together.When lock pin 61 residing states are to make lock part 63 be arranged in hole 59, two axle sleeve parts 52,53 to be fixed together when forming axle sleeve 51, then moving axially of lock pin 61 can make lock part 63 switch between the lock hole 59 that enters and leave separately.On the other hand, when lock pin 61 residing states are when making lock part 63 leave hole 59, the diameter that discharges compartment 65 just allows two sleeve parts to break away from so that sleeve 51 inserts outer tube 13 and extracts from outer tube 13 less than the formed clearance space of the diameter of lock part.Also have a leverage 67 to realize lock pin 61 moving axially between two states.
In first embodiment, the end of pipe assembly 15 seals by weld seam 22, as illustrated in Figures 5 and 6.Certainly, also can adopt other hermetically-sealed construction.
A kind of in other the hermetically-sealed construction represents that in the embodiment shown in accompanying drawing 12 and 13 this embodiment is similar with first embodiment in some aspects, and uses identical Reference numeral to represent similar portions.
In this embodiment, interior pipe 11 is shorter than outer tube 13, and like this, the end of interior pipe is the inboard of corresponding outer tube end in pipe assembly 15 just.Expose inner 14 and covered by a weld overlay 71 in that outer tube 13 every ends are resulting, this cover layer can be a heating wire TIG weld seam cover layer for example.
Though the end of interior pipe 11 can be in inboard any distance place, outer tube 13 corresponding ends, preferably 30 to 50 millimeters of this distances.
In the end of multiple tube 10 chamfering 73 is arranged, be used to weld purpose.
Usually, the length of multiple tube 10 is to weld one by one in the petroleum pipeline operation, and the abutting end of pipe assembly welds together by the girth welding operation.If defective or other defect take place in girth welding, under the situation that metallurgy seals between pipe and the outer tube 11,13 in not destroying, just can carry out rectification work.Rectification work is usually included between the joint of multiple tube 10 and cuts away girth welding, again chamfering carried out in the end of adjacent tubes, again multiple tube is welded together then.In other words, provide a unnecessary length in the weld overlay 71 of multiple tube 10 every ends, its can in not destroying, manage and outer tube between just can for example cut and mach operation under the condition of seal integrity.This just provides very big advantage when the joint that uses the pipe assembly is installed pipeline, can during not destroying, manage and outer tube 11,13 between finish work under the metallurgy situation about sealing at tube end.
The foregoing description relates to the manufacturing of multiple tube 10, and it has mechanical bond between interior pipe and outer tube 11,13.
The 3rd embodiment (not shown) is similar to the above embodiments, except have metallurgical binding between interior pipe and outer tube 11,13.This is included in before the expansion process, provides on one or two in the opposite face of interior pipe and outer tube and controls golden bond, will manage assembly 15 and be heated to a temperature that is enough to form metallurgical binding between interior pipe and outer tube after expansion process.In this embodiment, bond comprises the nickel-based brazing powder that is applied in any appropriate manner on interior pipe 11 outer surfaces, for example can apply by injection.When using spraying that brazing powder is provided, spraying can be finished by high-speed oxidation fuel (HVOF), velocity air fuel (HVAF) or plasma spraying.
In case interior pipe 11 is in the outer tube 13, just seals the space that forms between the two, forms vacuum and/or in enclosure space, introduce inert gas (for example argon gas).Pipe and outer tube 11,13 are radially expanded according to mode similar to the above embodiments then.After expansion process, pipe assembly 15 is just by an induction coil, and this induction coil can be heated to the pipe assembly temperature that is enough to interior pipe and outer tube are welded together, and this temperature is 1100 ℃ usually.
Can carry out any necessary finishing operation, for example heat treatment and straightening operation to the pipe assembly then.
From the above, clearly, each embodiment can provide simply a kind of but efficiently structure produce multiple tube.
Though the embodiment that relates to multiple tube has been described above, be understandable that the present invention is not limited to make multiple tube, it can be used to make any tubular construction with interior pipe and outer tube, wherein between interior pipe and outer tube interference engagement is arranged.
Can make various improvement and distortion in the case without departing from the scope of the present invention.
In whole specification, except the content of other form of needs, " comprise " and variation as " comprising (odd number) " or " having comprised ", be construed as and mean and comprise a specific integer or one group of integer, but do not get rid of other arbitrary integer or one group of integer.
Claims (20)
1, pipe and outer tube had interference engagement in a kind of method of making tubular construction, tubular construction had between them, and this method may further comprise the steps:
(a) two one of pipes are positioned among another, an assembly that has comprised interior pipe and outer tube is provided;
(b) be radially expanded the part of interior pipe so that contact with the circumferential section of outer tube;
(c) continue to be radially expanded in the above-mentioned part of pipe make in the above-mentioned part of pipe produce plastic deformation, and make the circumferential section generation strain of above-mentioned outer tube;
(d) internally part of pipe or a plurality of part repeating step (b) and (c).
2, the method for claim 1 is characterized in that expansion step (b) and (c) proceeds to the other end from an end of assembly in order.
3, the method for claim 1 is characterized in that expansion step (b) and (c) in the middle of the assembly two ends, and moves to an end gradually, moves to the other end then.
4,, it is characterized in that one or two the opposite face in two pipes can be strengthened mechanical bond between the two through preliminary treatment as claim 1,2 or 3 described methods.
5,, it is characterized in that also being included between the opposite face of two pipes and set up metallurgical binding as the described method of above-mentioned arbitrary claim.
6, as the described method of above-mentioned arbitrary claim, it is characterized in that the end of tubular construction is sealed.
7,, it is characterized in that welded seal is passed through in the end of tubular construction as the described method of above-mentioned claim 6.
8, as the described method of above-mentioned arbitrary claim, it is characterized in that at least one end of a pipe is positioned at the inboard of another pipe corresponding end, and the resulting exposed parts of another pipe is covered by a cover layer, this cover layer forms metallurgical binding on another pipe, and forms metallurgical sealing between two pipes.
9, as the described method of above-mentioned claim 8, pipe comprises an above-mentioned pipe in it is characterized in that, outer tube comprises above-mentioned another pipe.
10,, it is characterized in that cover layer comprises a weld overlay as above-mentioned claim 8 or 9 described methods.
11, a kind of tubular construction according to any one method manufacturing of claim 1 to 10.
12, the tubular construction of pipe and outer tube in a kind of having, interference engagement is arranged between them, one end of a pipe is positioned at the inboard of another pipe corresponding end, and another is managed formed exposed parts and is covered by a weld overlay, the metallurgy sealing in cover layer is provided between pipe and the outer tube.
13, as the described tubular construction of above-mentioned claim 12, pipe comprises an above-mentioned pipe in it is characterized in that, outer tube comprises above-mentioned another pipe.
14,, it is characterized in that above-mentioned metallurgical sealing is to be positioned at each end of tubular construction as above-mentioned claim 12 or 13 described tubular constructions.
15, a kind of device that is used to produce tubular construction with interior pipe and outer tube, between interior pipe and the outer tube interference engagement is arranged, this device comprises a understructure and the pressure texture on understructure, understructure is used for engaging with the inner surface of interior pipe, and move along inner surface, pressure texture has been determined a cylindrical pressure surface, and it can engage with the inner surface of interior pipe along with expanding.
16, as the described device of above-mentioned claim 15, it is characterized in that understructure comprises a roll assembly that has carried the support member of pressure texture and much carried support member, roll assembly can be used for rolling along the inner surface location of interior pipe and along inner surface.
17, as the described device of above-mentioned claim 16, it is characterized in that two roll assemblies are provided with at interval, pressure texture is positioned at the centre of two roll assemblies.
18,, it is characterized in that pressure texture comprises an expansion structure as the described device of above-mentioned claim 18.
19, a kind of with reference to the described method of accompanying drawing.
20, a kind of with reference to the described multiple tube of accompanying drawing.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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AU2003902440 | 2003-05-20 | ||
AU2003902440A AU2003902440A0 (en) | 2003-05-20 | 2003-05-20 | Production of clad pipes |
Publications (2)
Publication Number | Publication Date |
---|---|
CN1822907A true CN1822907A (en) | 2006-08-23 |
CN100364685C CN100364685C (en) | 2008-01-30 |
Family
ID=31501306
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CNB2004800202084A Ceased CN100364685C (en) | 2003-05-20 | 2004-05-20 | Production of clad pipes |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070132228A1 (en) |
EP (1) | EP1635969A4 (en) |
CN (1) | CN100364685C (en) |
AU (1) | AU2003902440A0 (en) |
BR (1) | BRPI0411149A (en) |
NO (1) | NO20056071L (en) |
WO (1) | WO2004103603A1 (en) |
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- 2004-05-20 BR BRPI0411149-4A patent/BRPI0411149A/en not_active Application Discontinuation
- 2004-05-20 CN CNB2004800202084A patent/CN100364685C/en not_active Ceased
- 2004-05-20 EP EP04734032A patent/EP1635969A4/en not_active Withdrawn
- 2004-05-20 WO PCT/AU2004/000672 patent/WO2004103603A1/en active Search and Examination
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Also Published As
Publication number | Publication date |
---|---|
BRPI0411149A (en) | 2006-07-11 |
EP1635969A1 (en) | 2006-03-22 |
WO2004103603A1 (en) | 2004-12-02 |
EP1635969A4 (en) | 2009-12-02 |
US20070132228A1 (en) | 2007-06-14 |
NO20056071L (en) | 2006-02-20 |
AU2003902440A0 (en) | 2003-06-05 |
CN100364685C (en) | 2008-01-30 |
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