CN104043910A - Welding joint of great-deformation steel pipe based on strain design region - Google Patents
Welding joint of great-deformation steel pipe based on strain design region Download PDFInfo
- Publication number
- CN104043910A CN104043910A CN201410169592.XA CN201410169592A CN104043910A CN 104043910 A CN104043910 A CN 104043910A CN 201410169592 A CN201410169592 A CN 201410169592A CN 104043910 A CN104043910 A CN 104043910A
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- China
- Prior art keywords
- welding joint
- welding
- steel pipe
- welding point
- great
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- 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
- 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
Abstract
The invention relates to a welding joint of a great-deformation steel pipe based on a strain design region, and belongs to the technical field of welding. The invention aims at providing a novel welding joint for preventing the steel pipe from fracturing at the welding joint part by aiming at the strain design region. The welding joint has the main technical scheme that the welding joint is different from the welding joint used in the prior art, the reinforcement of the welding joint is 2.5 to 5.0mm, and each side of an upper opening of a groove is broadened by 8.0 to 10.0mm. The welding joint has the advantages that the welding joint is generally the weakest position in a pipeline, and the integral deformation-resistant capability of the pipeline is enhanced after the welding joint is broadened and heightened. The welding joint is applicable to the welding of the great-deformation steel pipe made of x70 steel and the like.
Description
Technical field
The welding point that the present invention relates to a kind of steel pipe, belongs to welding technology field.
Background technology
Current domestic steel-pipe welding, for reducing local stress, general welding point reinforcement is controlled at 0-2.0mm left and right.Cap weld is wide: suitable for reading every side broadening 0.5-2.0mm left and right of grooves of welding joints.Especially the large deformation steel such as X70, domestic also through using the ripe welding point of checking.
Summary of the invention
The object of the invention is: for stress design area, for preventing that steel pipe is at the fracture of welding point place, a kind of new welding point adopting.
Technical scheme of the present invention is as follows: different from other welding method, welder's welding is when capping, and toe of weld that should first butt welded seam both sides carries out reinforcement, covers welding.In welding process, can micro-ly put, to reach the width requirement of welding point, and then carry out the multi-pass welding at weld seam center, reach the reinforcement requirement of welding point.The general reinforcement of welding point using is at present controlled at 0-2.0mm left and right.Cap weld is wide: suitable for reading every side broadening 0.5-2.0mm left and right of grooves of welding joints.And large deformation steel welded joint reinforcement 2.5-5.0mm.Welding point width is at suitable for reading every side broadening 8.0-10.0mm of groove.And make welding point rounding off.The mechanical properties such as welding point is curved through face, it is curved to carry on the back, stretching experiment showed, the ability that has increased the whole resistance to deformation of pipeline after welding point broadening is increased.
Advantage of the present invention is: general welding point is position the weakest in pipeline, and the rear ability that increases the whole resistance to deformation of pipeline is increased in the welding point broadening based on stress design area large deformation Steel Pipe Design.
The present invention is applicable to: the welding of the large deformation steel conduits such as x70 steel.
Accompanying drawing explanation
Fig. 1 is the partial enlarged drawing of welding point. Fig. 2 is the front view of welding point.
1: steel pipe 2: welding point reinforcement 3: welding point 4: welding point broadening
The specific embodiment
First should work out welding procedure sheet according to welding procedure specification (WPS), welding surroundings: temperature, humidity, wind speed should meet the demands.Before weldering, answer preheating, welder should take appointment with certificate, and on steel pipe (1), welds.Welder's welding is when capping, toe of weld that should first butt welded seam both sides carries out reinforcement, cover in welding process and can micro-ly put, to reach the requirement of welding point broadening (4), and then carry out the multi-pass welding at welding point center, reach the requirement of welding point reinforcement (2), welding point (3) the reinforcement 2.5-5.0mm of qualified large deformation steel pipe, suitable for reading every side broadening 8.0-10.0mm of groove also makes welding point rounding off.Large deformation Steel Welded Joint generally should be through visual examination, and the blemish such as misalignment, undercut are answered passed examination, and weld seam inside should be qualified through nondestructive flaw detection examination.Guarantee the safe handling of pipeline.
Claims (1)
1. a kind of welding point based on stress design area large deformation steel pipe, comprise steel pipe, welding point, it is characterized in that: welding point reinforcement 2.5-5.0mm, the width of welding point is at suitable for reading every side broadening 8.0-10.0mm of groove, and makes welding point rounding off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410169592.XA CN104043910A (en) | 2014-04-16 | 2014-04-16 | Welding joint of great-deformation steel pipe based on strain design region |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410169592.XA CN104043910A (en) | 2014-04-16 | 2014-04-16 | Welding joint of great-deformation steel pipe based on strain design region |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104043910A true CN104043910A (en) | 2014-09-17 |
Family
ID=51497570
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410169592.XA Pending CN104043910A (en) | 2014-04-16 | 2014-04-16 | Welding joint of great-deformation steel pipe based on strain design region |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104043910A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336583B1 (en) * | 1999-03-23 | 2002-01-08 | Exxonmobil Upstream Research Company | Welding process and welded joints |
| JP2011125921A (en) * | 2009-12-21 | 2011-06-30 | Mitsubishi Heavy Ind Ltd | Improvement structure in creep strength of welded joint |
| CN102639278A (en) * | 2009-12-04 | 2012-08-15 | 新日本制铁株式会社 | Butt weld joint and method for manufacturing same |
-
2014
- 2014-04-16 CN CN201410169592.XA patent/CN104043910A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6336583B1 (en) * | 1999-03-23 | 2002-01-08 | Exxonmobil Upstream Research Company | Welding process and welded joints |
| CN102639278A (en) * | 2009-12-04 | 2012-08-15 | 新日本制铁株式会社 | Butt weld joint and method for manufacturing same |
| JP2011125921A (en) * | 2009-12-21 | 2011-06-30 | Mitsubishi Heavy Ind Ltd | Improvement structure in creep strength of welded joint |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |