CN113145993A - Header pipe seat welding process - Google Patents
Header pipe seat welding process Download PDFInfo
- Publication number
- CN113145993A CN113145993A CN202110578675.4A CN202110578675A CN113145993A CN 113145993 A CN113145993 A CN 113145993A CN 202110578675 A CN202110578675 A CN 202110578675A CN 113145993 A CN113145993 A CN 113145993A
- Authority
- CN
- China
- Prior art keywords
- welding
- header
- tube seat
- layer
- 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.)
- Pending
Links
- 238000003466 welding Methods 0.000 title claims abstract description 78
- 238000000034 method Methods 0.000 title claims abstract description 21
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- NGONBPOYDYSZDR-UHFFFAOYSA-N [Ar].[W] Chemical compound [Ar].[W] NGONBPOYDYSZDR-UHFFFAOYSA-N 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 3
- 230000007774 longterm Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 16
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
Abstract
The invention provides a welding process of a header pipe seat, which comprises the following steps of selecting a pipeline with the diameter of DN350 multiplied by 1000mm multiplied by 12mm as a base material of a header, and forming a hole in the vertical direction of the header, wherein the shape of the hole is an annular space curve without forming a groove; the tube seat is a DN80 standard tube seat, a saddle-shaped groove is formed in one section of the tube seat, the groove of the tube seat is attached to and positioned with the outline of the opening of the header before welding, a positioning block is arranged at the top of the tube seat, and a base is arranged at the bottom of the header to limit the rigid movement of a welding part; a welding gun is adopted to carry out multilayer multi-pass welding, the gun head of the welding gun is 45 degrees during welding, three welding seams are formed in the welding process, the welding gun carries out anticlockwise closed-loop welding along a saddle-shaped welding path, the welding seams comprise three layers, namely a bottoming layer, a filling layer and a covering layer. The saddle-shaped welding seam of the pipe seat header welded by the process has high strength and small deformation, and has less phenomena of cracks and other defects in long-term high-temperature and high-pressure service.
Description
Technical Field
The invention provides a welding process, particularly relates to a header pipe seat welding process, and belongs to the field of manufacturing of pressure containers.
Background
The welding process of the saddle welding seam of the header pipe seat is complex, the factors influencing the quality and the performance are many, in the actual service process, the header pipe seat not only bears the internal pressure, but also is often acted by the bending moment, the torque and the axial force, and the header pipe seat is often a dangerous part with higher stress concentration in a piping system due to the geometric structure of the header pipe seat and the complexity of the external load, so that the integrity and the safe operation of the whole piping system are directly influenced by the quality of the welding quality and the bearing capacity of the header pipe seat in a certain sense. The method reduces the defects of the welding seam after the welding is finished and improves the welding quality by optimizing the welding sequence.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the header tube seat welding process, the header tube seat welded by the process has high structural strength, cannot deform in long-term use, and prolongs the service life of the header tube seat.
The technical scheme adopted for realizing the above purpose of the invention is as follows: a saddle-shaped welding seam welding process for a header pipe seat comprises the following steps: selecting a pipeline with the diameter of DN350 multiplied by 1000 multiplied by 12mm as a parent metal of the header, and opening a hole in the vertical direction of the header without a groove; the tube seat is a DN80 standard tube seat, a saddle-shaped groove is formed in one section of the tube seat, the groove of the tube seat is attached to and positioned with the outline of the opening of the header before welding, a positioning block is arranged at the top of the tube seat, and a base is arranged at the bottom of the header to limit the rigid movement of a welding part; a welding gun is adopted to carry out multilayer multi-pass welding, the gun head of the welding gun is 45 degrees during welding, three welding seams are formed in the welding process, the welding gun carries out anticlockwise closed-loop welding along a saddle-shaped welding path, the welding seams comprise three layers, namely a bottoming layer, a filling layer and a covering layer.
Furthermore, the shape of the opening of the header is an annular space curve.
Furthermore, one end of the pipe seat is a V-shaped groove, the other end of the pipe seat is a saddle-shaped groove, and the angles of the grooves are within the range of 35-50 degrees.
Furthermore, the bottom layer is welded by manual argon tungsten-arc welding, the filling layer and the cover surface layer are welded by carbon dioxide gas protection, and the gun head of a welding gun is aligned to the crack of the header pipe seat and is welded layer by layer.
Drawings
FIG. 1 is a geometric drawing of header tube seat structure;
in the figure: 1-header and 2-pipe seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
As shown in FIG. 1, the invention provides a saddle-shaped welding seam welding process for a header pipe seat, which is characterized by comprising the following steps: selecting a pipeline with the diameter of DN350 multiplied by 1000 multiplied by 12mm as a parent metal of the header, and opening a hole in the vertical direction of the header without a groove; the tube seat is a DN80 standard tube seat, a saddle-shaped groove is formed in one section of the tube seat, the groove of the tube seat is attached to and positioned with the outline of the opening of the header before welding, a positioning block is arranged at the top of the tube seat, and a base is arranged at the bottom of the header to limit the rigid movement of a welding part; a welding gun is adopted to carry out multilayer multi-pass welding, the gun head of the welding gun is 45 degrees during welding, three welding seams are formed in the welding process, the welding gun carries out anticlockwise closed-loop welding along a saddle-shaped welding path, the welding seams comprise three layers, namely a bottoming layer, a filling layer and a covering layer.
Furthermore, the shape of the opening of the header is an annular space curve.
Furthermore, one end of the pipe seat is a V-shaped groove, the other end of the pipe seat is a saddle-shaped groove, and the angles of the grooves are within the range of 35-50 degrees.
Furthermore, the bottom layer is welded by manual argon tungsten-arc welding, the filling layer and the cover surface layer are welded by carbon dioxide gas protection, and the gun head of a welding gun is aligned to the crack of the header pipe seat and is welded layer by layer.
Claims (4)
1. A saddle-shaped welding seam welding process for a header pipe seat is characterized by comprising the following steps: selecting a pipeline with the diameter of DN350 multiplied by 1000 multiplied by 12mm as a parent metal of the header, and opening a hole in the vertical direction of the header without a groove; the tube seat is a DN80 standard tube seat, a saddle-shaped groove is formed in one section of the tube seat, the groove of the tube seat is attached to and positioned with the outline of the opening of the header before welding, a positioning block is arranged at the top of the tube seat, and a base is arranged at the bottom of the header to limit the rigid movement of a welding part; a welding gun is adopted to carry out multilayer multi-pass welding, the gun head of the welding gun is 45 degrees during welding, three welding seams are formed in the welding process, the welding gun carries out anticlockwise closed-loop welding along a saddle-shaped welding path, the welding seams comprise three layers, namely a bottoming layer, a filling layer and a covering layer.
2. The header welding process of claim 1 wherein the header opening is shaped as an annular space curve.
3. The header welding process of claim 1 wherein one end of the header is a V-groove and the other end is a saddle-groove, the groove angles being in the range of 35 ° to 50 °.
4. The header welding process of claim 1, wherein the primer layer is welded by argon tungsten arc welding, the filler layer and the cap layer are welded by carbon dioxide gas arc welding, and the tip of the welding gun is aligned with the crack of the header and welded layer by layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110578675.4A CN113145993A (en) | 2021-05-26 | 2021-05-26 | Header pipe seat welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110578675.4A CN113145993A (en) | 2021-05-26 | 2021-05-26 | Header pipe seat welding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113145993A true CN113145993A (en) | 2021-07-23 |
Family
ID=76877581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110578675.4A Pending CN113145993A (en) | 2021-05-26 | 2021-05-26 | Header pipe seat welding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113145993A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57127579A (en) * | 1981-02-02 | 1982-08-07 | Nippon Kokan Kk <Nkk> | Welding device for main pipe body and branch pipe body |
| CN102151954A (en) * | 2011-02-23 | 2011-08-17 | 格菱动力设备(中国)有限公司 | Operating method for welding fillet weld of tube seat on header |
| CN103111730A (en) * | 2013-01-22 | 2013-05-22 | 北京中电华强焊接工程技术有限公司 | Saddle-shaped track automation welding method of collection box large tube socket |
| CN106735999A (en) * | 2017-01-21 | 2017-05-31 | 中国东方电气集团有限公司 | A kind of variable cross-section groove header base automatic soldering method |
| CN107999934A (en) * | 2017-12-11 | 2018-05-08 | 中国第重型机械集团大连加氢反应器制造有限公司 | Saddle-shaped joint pipe groove narrow-clearance submerged arc welding connects method and apparatus |
| CN108890092A (en) * | 2018-07-18 | 2018-11-27 | 攀钢集团工程技术有限公司 | The method of consumable electrode MAG weldering welding tube sheet single face welding and double face shaping |
-
2021
- 2021-05-26 CN CN202110578675.4A patent/CN113145993A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57127579A (en) * | 1981-02-02 | 1982-08-07 | Nippon Kokan Kk <Nkk> | Welding device for main pipe body and branch pipe body |
| CN102151954A (en) * | 2011-02-23 | 2011-08-17 | 格菱动力设备(中国)有限公司 | Operating method for welding fillet weld of tube seat on header |
| CN103111730A (en) * | 2013-01-22 | 2013-05-22 | 北京中电华强焊接工程技术有限公司 | Saddle-shaped track automation welding method of collection box large tube socket |
| CN106735999A (en) * | 2017-01-21 | 2017-05-31 | 中国东方电气集团有限公司 | A kind of variable cross-section groove header base automatic soldering method |
| CN107999934A (en) * | 2017-12-11 | 2018-05-08 | 中国第重型机械集团大连加氢反应器制造有限公司 | Saddle-shaped joint pipe groove narrow-clearance submerged arc welding connects method and apparatus |
| CN108890092A (en) * | 2018-07-18 | 2018-11-27 | 攀钢集团工程技术有限公司 | The method of consumable electrode MAG weldering welding tube sheet single face welding and double face shaping |
Non-Patent Citations (4)
| Title |
|---|
| 吕慧: "联箱管座角焊缝裂纹及防止措施探讨", 《湖南电力》 * |
| 王传友: "手工钨极氩弧盲焊技术在炉管安装工程中的应用", 《石油化工建设》 * |
| 白占桥: "插入式联箱角焊缝的无损探伤", 《华北电力技术》 * |
| 马继国: "压力容器焊接接头的分析", 《化工设备与管道》 * |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |
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| RJ01 | Rejection of invention patent application after publication |