CN105583582A - Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly - Google Patents
Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly Download PDFInfo
- Publication number
- CN105583582A CN105583582A CN201610042419.2A CN201610042419A CN105583582A CN 105583582 A CN105583582 A CN 105583582A CN 201610042419 A CN201610042419 A CN 201610042419A CN 105583582 A CN105583582 A CN 105583582A
- Authority
- CN
- China
- Prior art keywords
- double
- metal pipe
- pipe fitting
- overlay cladding
- groove
- 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
-
- 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
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
- B23K33/006—Filling of continuous seams for cylindrical workpieces
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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)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Arc Welding In General (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
A bi-metal pipeline and pipe fitting beveling method is used for a bi-metal pipeline and a bi-metal pipe fitting. The bi-metal pipeline and the bi-metal pipe fitting each comprise a base layer and a composite layer. Each base layer is made of one of carbon steel, alloy steel and stainless steel. Each composite layer is made of nickel-based alloy or stainless steel. The beveling method comprises the first step that primary beveling is conducted on the base layer and the composite layer of the end face of the bi-metal pipeline or the bi-metal pipe fitting, and the end face is called a beveled end face after primary beveling. The problem of circular seam leakage caused by misalignment can be solved, and the circular seam installation quality is guaranteed.
Description
Technical field
The present invention relates to pipeline field, especially relate to a kind of Double-metal pipe and pipe fitting.
Background technology
In recent years, along with oil, natural gas, chemical industry, developing rapidly of boats and ships exploitation, corrosive pipeline environment has proposed higher to conveyance conduit, more harsh corrosion-resistant requirement, most is bimetallic pipeline, corrosion-resistant, wearability is strong especially, be adapted to ocean, oil, chemical industry, medicine, electric power, natural gas transport, aerospace industry, the aspects such as shipbuilding, but bimetallic pipeline is divided into basic unit and multiple layer two parts, when the pipe fitting diameter of pipeline poor in critical field and when organizing right weld bond misalignment and reaching 0-4mm, multiple layer thickness only has 2-4mm, in the time that pipeline and pipe fitting are all in critical field, counterpart unfitness of butt joint is 4mm to the maximum, the effective thickness of multiple like this layer welding only has 0-2mm, sometimes because positive negative value impact causes misalignment serious, multiple layer effective thickness is 0, cause like this welding of multiple layer and basic unit, the rear leakage of the girth joint operation consequence that causes pipeline is very serious, and cause weld seam material to change, the decay resistance of weld seam also declines greatly. in standard, when the nominal diameter of pipe fitting is during at 650-750, inner end diameter size is ± 2.0, in critical field, and positive 4 values of good job between ﹢ 2 and ﹣ 2, multiple layer thickness is only 2-4mm, is easy to cause misalignment phenomenon.
Summary of the invention
The object of the present invention is to provide a kind of Double-metal pipe and pipe bevel method and Double-metal pipe pipe fitting, the problem of avoiding the circumferential weld causing due to misalignment to reveal, ensures circumferential weld installation quality.
Technical scheme of the present invention is:
Double-metal pipe and pipe bevel method, for Double-metal pipe and bimetal pipe fitting, Double-metal pipe and bimetal pipe fitting include basic unit and multiple layer, and the material of basic unit is carbon steel, steel alloy and stainless wherein a kind of, the material of multiple layer is nickel-base alloy or stainless steel
Groove method:
The first step, to all carrying out groove processing for the first time on the basic unit of Double-metal pipe or bimetal pipe fitting end face and multiple layer, the end face after groove processing is for the first time called groove end face;
Second step, in the enterprising windrow weldering of the groove end face processing, forms overlay cladding, and the overlay cladding at this moment forming is called initial overlay cladding;
The 3rd step, the end face of the initial overlay cladding that built-up welding is formed carries out groove processing for the second time, and the overlay cladding after groove processing is for the second time called final overlay cladding, and the thickness of final overlay cladding is not less than the thickness of multiple layer;
The 4th step, obtains required Double-metal pipe or bimetal pipe fitting.
The thickness of multiple layer is 2-4mm, and the thickness of final overlay cladding is 2-4mm.
The material of overlay cladding is nickel-base alloy or stainless steel.
The number of degrees of groove are 30-37.5 degree.
The thickness of final overlay cladding is identical.
Adopt described Double-metal pipe and the Double-metal pipe pipe fitting of pipe bevel method, Double-metal pipe pipe fitting comprises Double-metal pipe and bimetal pipe fitting, Double-metal pipe and bimetal pipe fitting include basic unit and are positioned at the multiple layer in basic unit outside, the material of multiple layer is nickel-base alloy or stainless steel, the end of Double-metal pipe or bimetal pipe fitting is provided with groove, groove place is provided with overlay cladding, and the thickness of overlay cladding is not less than the thickness of multiple layer.
The material of overlay cladding is nickel-base alloy or stainless steel.
The material of overlay cladding is identical with the material of multiple layer.
The thickness of overlay cladding is 2-4mm.
The number of degrees of groove are 30-37.5 degree.
The method of built-up welding composite bed on the Double-metal pipe that the present invention adopts and the groove of pipe fitting, has avoided weld seam to reveal because misalignment causes in use weld seam, has ensured weldquality and conduit running security.
On pipeline or pipe fitting after groove, built-up welding one deck nickel-base alloy and stainless steel layer on groove, built-up welding thickness is 2-4mm, like this in the process of groove welding weld metal be welded as metal of the same race, there will not be because the problem that the circumferential weld that misalignment causes is revealed ensures circumferential weld installation quality.
The groove that adopts method of the present invention to make can be avoided aforesaid defect, the serious problems of avoiding misalignment and misalignment to cause.
Brief description of the drawings
Fig. 1 is the structural representation of Double-metal pipe of the present invention or pipe fitting end groove.
Detailed description of the invention
As shown in Figure 1, Double-metal pipe of the present invention and pipe bevel method, for Double-metal pipe and bimetal pipe fitting, Double-metal pipe and bimetal pipe fitting include basic unit 1 and multiple layer 2, the material of basic unit 1 is carbon steel, steel alloy and stainless one, the material of multiple layer 2 is nickel-base alloy or stainless steel
Groove method:
The first step, all carries out groove processing for the first time on the basic unit 1 to Double-metal pipe or bimetal pipe fitting end face and multiple layer 2, and the number of degrees α of groove is 30-37.5 degree;
Second step, in the enterprising windrow weldering of the groove end face 4 processing, forms overlay cladding, and the material of overlay cladding is nickel-base alloy or stainless steel. At this moment the overlay cladding forming is called initial overlay cladding;
The 3rd step, the end face of the initial overlay cladding that built-up welding is formed carries out groove processing for the second time, and the number of degrees β=α of groove is also 30-37.5 degree; Overlay cladding after groove processing is called final overlay cladding 3, and the thickness of final overlay cladding 3 is not less than the thickness of multiple layer; The thickness of multiple layer 2 is 2-4mm, and the thickness of final overlay cladding 3 is 2-4mm. The thickness of final overlay cladding 3 is consistent in groove direction, and final overlay cladding 3 thickness everywhere equates.
The 4th step, obtains required Double-metal pipe or bimetal pipe fitting.
Adopt Double-metal pipe and the pipe fitting of this groove method, Double-metal pipe and bimetal pipe fitting include basic unit 1 and are positioned at the multiple layer 2 in basic unit 1 outside, the end of Double-metal pipe or bimetal pipe fitting is provided with groove, groove place is provided with overlay cladding along groove direction, and the thickness of overlay cladding is not less than the thickness of multiple layer 2.
Built-up welding thickness can not be less than the thickness of multiple layer, and the multiple layer thickness that ensures groove end face reaches 2-4mm, this groove type is in the time carrying out girth welding, ensure the corrosion resistance of weld metal, thereby ensure welding quality, avoid weld seam in pipeline performance process to reveal, thereby ensured the safety in operation of pipeline.
Claims (10)
1. Double-metal pipe and pipe bevel method, for Double-metal pipe and bimetal pipe fitting, Double-metal pipe and bimetal pipe fitting include basic unit and multiple layer, and the material of basic unit is carbon steel, steel alloy and stainless wherein a kind of, the material of multiple layer is nickel-base alloy or stainless steel, it is characterized in that:
Groove method:
The first step, to all carrying out groove processing for the first time on the basic unit of Double-metal pipe or bimetal pipe fitting end face and multiple layer, the end face after groove processing is for the first time called groove end face;
Second step, in the enterprising windrow weldering of the groove end face processing, forms overlay cladding, and the overlay cladding at this moment forming is called initial overlay cladding;
The 3rd step, the end face of the initial overlay cladding that built-up welding is formed carries out groove processing for the second time, and the overlay cladding after groove processing is for the second time called final overlay cladding, and the thickness of final overlay cladding is not less than the thickness of multiple layer;
The 4th step, obtains required Double-metal pipe or bimetal pipe fitting.
2. Double-metal pipe groove method according to claim 1, is characterized in that: the thickness of multiple layer is 2-4mm, and the thickness of final overlay cladding is 2-4mm.
3. Double-metal pipe groove method according to claim 1, is characterized in that: the material of overlay cladding is nickel-base alloy or stainless steel.
4. Double-metal pipe groove method according to claim 1, is characterized in that: the number of degrees of groove are 30-37.5 degree.
5. Double-metal pipe groove method according to claim 1, is characterized in that: the thickness of final overlay cladding is identical.
6. adopt the Double-metal pipe pipe fitting of Double-metal pipe as claimed in claim 1 and pipe bevel method, Double-metal pipe pipe fitting comprises Double-metal pipe and bimetal pipe fitting, Double-metal pipe and bimetal pipe fitting include basic unit and are positioned at the multiple layer in basic unit outside, the material of multiple layer is nickel-base alloy or stainless steel, it is characterized in that: the end of Double-metal pipe or bimetal pipe fitting is provided with groove, groove place is provided with overlay cladding, and the thickness of overlay cladding is not less than the thickness of multiple layer.
7. Double-metal pipe pipe fitting as claimed in claim 6, is characterized in that: the material of overlay cladding is nickel-base alloy or stainless steel.
8. Double-metal pipe pipe fitting as claimed in claim 6, is characterized in that: the material of overlay cladding is identical with the material of multiple layer.
9. Double-metal pipe pipe fitting as claimed in claim 6, is characterized in that: the thickness of overlay cladding is 2-4mm.
10. Double-metal pipe pipe fitting as claimed in claim 6, is characterized in that: the number of degrees of groove are 30-37.5 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042419.2A CN105583582A (en) | 2016-01-22 | 2016-01-22 | Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610042419.2A CN105583582A (en) | 2016-01-22 | 2016-01-22 | Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly |
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| CN105583582A true CN105583582A (en) | 2016-05-18 |
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| CN201610042419.2A Pending CN105583582A (en) | 2016-01-22 | 2016-01-22 | Bi-metal pipeline and pipe fitting beveling method and bi-metal pipeline and pipe fitting assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984062A (en) * | 2017-11-27 | 2018-05-04 | 江苏金通灵流体机械科技股份有限公司 | A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds |
Citations (7)
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|---|---|---|---|---|
| JPH08267248A (en) * | 1995-03-30 | 1996-10-15 | Kubota Corp | Method for butt welding of clad pipe |
| CN101100013A (en) * | 2007-07-04 | 2008-01-09 | 中国石油天然气集团公司 | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN101890562A (en) * | 2010-07-26 | 2010-11-24 | 上海电气核电设备有限公司 | Nuclear island primary device connection tube safe end dissimilar metal welding technology |
| CN103612001A (en) * | 2013-12-12 | 2014-03-05 | 西安向阳航天材料股份有限公司 | Bimetal composite pipe end sealing weld technology based on R-shaped groove |
| CN104197104A (en) * | 2014-08-22 | 2014-12-10 | 西安向阳航天材料股份有限公司 | Double-metal composite tube and manufacturing process thereof |
| CN105127685A (en) * | 2015-09-22 | 2015-12-09 | 西安向阳航天材料股份有限公司 | Method for sealing weld of pipe end of mechanical bimetal composite pipe |
-
2016
- 2016-01-22 CN CN201610042419.2A patent/CN105583582A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08267248A (en) * | 1995-03-30 | 1996-10-15 | Kubota Corp | Method for butt welding of clad pipe |
| CN101100013A (en) * | 2007-07-04 | 2008-01-09 | 中国石油天然气集团公司 | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method |
| CN101462193A (en) * | 2009-01-09 | 2009-06-24 | 中国石油天然气集团公司 | Method for welding thin layer iron nickel base alloy carbon steel composite tube |
| CN101890562A (en) * | 2010-07-26 | 2010-11-24 | 上海电气核电设备有限公司 | Nuclear island primary device connection tube safe end dissimilar metal welding technology |
| CN103612001A (en) * | 2013-12-12 | 2014-03-05 | 西安向阳航天材料股份有限公司 | Bimetal composite pipe end sealing weld technology based on R-shaped groove |
| CN104197104A (en) * | 2014-08-22 | 2014-12-10 | 西安向阳航天材料股份有限公司 | Double-metal composite tube and manufacturing process thereof |
| CN105127685A (en) * | 2015-09-22 | 2015-12-09 | 西安向阳航天材料股份有限公司 | Method for sealing weld of pipe end of mechanical bimetal composite pipe |
Non-Patent Citations (1)
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| 宋建义: "内衬不锈钢复合管焊接工艺的改进", 《民营科技》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107984062A (en) * | 2017-11-27 | 2018-05-04 | 江苏金通灵流体机械科技股份有限公司 | A kind of welding method of SUS316 austenitic stainless steels and Weldox700E low-alloy quenched and tempered steel different steel welds |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160518 |
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| RJ01 | Rejection of invention patent application after publication |