CN107081509A - Pipeline welding process - Google Patents
Pipeline welding process Download PDFInfo
- Publication number
- CN107081509A CN107081509A CN201710204162.0A CN201710204162A CN107081509A CN 107081509 A CN107081509 A CN 107081509A CN 201710204162 A CN201710204162 A CN 201710204162A CN 107081509 A CN107081509 A CN 107081509A
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- China
- Prior art keywords
- welding
- pipeline
- weld
- welded
- slope
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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
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- 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
- B23K9/18—Submerged-arc welding
- B23K9/186—Submerged-arc welding making use of a consumable electrodes
-
- 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
- B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a kind of pipeline welding process, including following welding step:Retaining wall on slope, weldering before processing, welding preparation, start welding, welding inspection, weld completion, the beneficial effects of the invention are as follows：The welding procedure of the present invention passes through the cleaning before welding to groove, and strictly control the scope of inwall unfitness of butt joint, realize and weld assembly is accurately positioned, it ensure that the intensity of welding, simultaneously the martensite hardened structure that processing is produced at tube groove is reduced by being preheated before welding to welding position, improve the cracking resistance of welding, avoid the generation of weld crack, finally weld is checked before cosmetic welding, the crack for welding improper generation is not only avoid, is also beneficial in welding gap dissipate hydrogen spilling.
Description
Technical field
The present invention relates to welding procedure, and in particular to pipeline welding process.
Background technology
At present, with science and technology advancing, all trades and professions to the transfer pipeline product in machinery industry increasingly
Increase, it is necessary to substantial amounts of heavy caliber and high performance delivery pipe in such as oil exploitation industry, in low Boiler Tube, high pressure
It is also required to use carbon steel piping in seamless steel tube for boiler.The welding quality of carbon steel piping requires higher, and existing steel-pipe welding technique
Electroplating equipment wielding machine poor-performing in carbon steel pipe commissure, can not meet some for the higher neck of commissure mechanical property requirements
The application in domain；Part steel pipe manufacturer of today realizes welding carbon steel pipe and stainless steel to solve the problem using submerged-arc welding
Pipe, but this method uses the production method of single steel plate, the demand in market far can not be met by causing output.
It is to produce the weaker main cause of welded pipe line mechanical performance at present to being dealt with improperly at pipeline welding.
The content of the invention
It is an object of the invention to provide a kind of pipeline welding process, solve at present to being dealt with improperly at pipeline welding,
It is to produce the problem of welded pipe line mechanical performance is weaker.
To solve above-mentioned technical problem, the present invention uses following technical scheme：
Pipeline welding process, including following welding step：
Retaining wall on slope：First to the weld of pipeline according to welding procedure sheet progress retaining wall on slope before welding；
Processed before weldering：Inner and outer pipes face at tube groove processing is polished, 1~3cm of inner and outer pipes face at retaining wall on slope is removed
In the range of paint, water stain, miscellaneous dirt and dirt, until tube groove processing at inner and outer pipes face it is smooth without projection；
Welding preparation：Start before welding, pipeline domestic demand is blocked with felt, prevent ventilative in pipeline, while and to pipe to be welded
Road weld when tube wall temperature reaches 80~100 DEG C, stops preheating with being preheated；
Start welding：Pipeline after preheating is welded, wherein welding sequence is composite surface soldering and sealing first to groove, is then welded
Coating is connect, then welding transition layer, is subsequently filled weldering, last cosmetic welding；
Welding inspection：After the completion of filling weldering, weld is checked, the position for having weld defect is removed, it is then again pre-
Heating, and carry out second of welding；
Welding is completed：After welding inspection is errorless, cosmetic welding is carried out to weld.
In the technical program, the projection before weldering at processing mainly cleaning groove, so that ensureing the accuracy of welding,
Avoid reducing the mechanical strength at pipeline welding because of impurity, and block pipeline before welding, when being in order to avoid welding,
It is ventilative in pipeline to make temperature drop at groove too fast so as to influence welding, the mechanical performance after influence welding, and preheat and reduce
The martensite hardened structure that processing is produced at tube groove, improves the cracking resistance of welding, it is to avoid the generation of weld crack,
It is last that weld is checked, the crack for welding improper generation is not only avoid after the completion of filling weldering, it is also beneficial to welding
Hydrogen is dissipated in gap to overflow.
Further technical scheme is, when the above-mentioned same groove position welding times on pipeline are more than twice,
Welding times are amputated more than groove position twice, groove position is then selected again and is processed.
In the technical program, same position is repeatedly processed, so make the hydrogen that the tube metal of weld dissolves to
Overheated zone diffusing capacity increase, the hidden danger as generation heat affected area cold crack, delayed crack, and cause its position mechanical property
Decline.
Further technical scheme is that above-mentioned when starting welding, the alignment clearance of welding is in 2~3mm.More enter
The technical scheme of one step is that above-mentioned welding wire and the horizontal sextant angle of welding direction are between 70~80 °.
Further technical scheme is that the bevel angle of above-mentioned welded pipe line is 35~45 °.
Further technical scheme is, above-mentioned when being welded to pipeline, and welding groove is Y types.
Compared with prior art, the beneficial effects of the invention are as follows：
The welding procedure of the present invention strictly controls the scope of inwall unfitness of butt joint by the cleaning before welding to groove, realizes
Weld assembly is accurately positioned, it is ensured that the intensity of welding, while by being reduced before welding to welding position preheating
The martensite hardened structure that processing is produced at tube groove, improves the cracking resistance of welding, it is to avoid the generation of weld crack,
Finally weld is checked before cosmetic welding, the crack for welding improper generation is not only avoid, is also beneficial to soldered
Hydrogen is dissipated in gap to overflow.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to invent into
Row is further described.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, limit is not used to
The fixed present invention.
Embodiment 1
Pipeline welding process, including following welding step：
1st, retaining wall on slope：First to the weld of pipeline according to welding procedure sheet progress retaining wall on slope, wherein bevel angle before welding
For 45 °；
2nd, processed before welding：Inner and outer pipes face at tube groove processing is polished, inner and outer pipes face 1cm models at retaining wall on slope are removed
Interior paint, water stain, miscellaneous dirt and dirt are enclosed, until the inner and outer pipes face at tube groove processing is smooth without projection；
3rd, welding preparation：Start before welding, pipeline domestic demand is blocked with felt, prevent ventilative in pipeline, while and to be welded
With being preheated at pipeline welding, when tube wall temperature reaches 100 DEG C, stop preheating；
4th, welding is started：Pipeline after preheating is welded, the alignment clearance of welding is in 2mm, the water of welding wire and welding direction
Flat angle is at 70 °, and wherein welding sequence is composite surface soldering and sealing first to groove, then weld overlay, then welding transition layer, so
Filling weldering, last cosmetic welding afterwards；
5th, welding inspection：After the completion of filling weldering, weld is checked, the position for having weld defect removed, then again
Preheating, and carry out second of welding；
6th, welding is completed：After welding inspection is errorless, cosmetic welding is carried out to weld.
Embodiment 2
Pipeline welding process, including following welding step：
1st, retaining wall on slope：First to the weld of pipeline according to welding procedure sheet progress retaining wall on slope before welding, bevel angle is
35°；
2nd, processed before welding：Inner and outer pipes face at tube groove processing is polished, inner and outer pipes face 3cm models at retaining wall on slope are removed
Interior paint, water stain, miscellaneous dirt and dirt are enclosed, until the inner and outer pipes face at tube groove processing is smooth without projection；
3rd, welding preparation：Start before welding, pipeline domestic demand is blocked with felt, prevent ventilative in pipeline, while and to be welded
With being preheated at pipeline welding, when tube wall temperature reaches 80 DEG C, stop preheating；
4th, welding is started：Pipeline after preheating is welded, the alignment clearance of welding is in 3mm, the water of welding wire and welding direction
Flat angle is at 80 °, and wherein welding sequence is composite surface soldering and sealing first to groove, then weld overlay, then welding transition layer, so
Filling weldering, last cosmetic welding afterwards；
5th, welding inspection：After the completion of filling weldering, weld is checked, the position for having weld defect removed, then again
Preheating, and carry out second of welding；
6th, welding is completed：After welding inspection is errorless, cosmetic welding is carried out to weld.
Embodiment 3
Pipeline welding process, including following welding step：
1st, retaining wall on slope：First to the weld of pipeline according to welding procedure sheet progress retaining wall on slope before welding, bevel angle is
40°；
2nd, processed before welding：Inner and outer pipes face at tube groove processing is polished, inner and outer pipes face 2cm models at retaining wall on slope are removed
Interior paint, water stain, miscellaneous dirt and dirt are enclosed, until the inner and outer pipes face at tube groove processing is smooth without projection；
3rd, welding preparation：Start before welding, pipeline domestic demand is blocked with felt, prevent ventilative in pipeline, while and to be welded
With being preheated at pipeline welding, when tube wall temperature reaches 90 DEG C, stop preheating；
4th, welding is started：Pipeline after preheating is welded, the alignment clearance of welding in 2.5mm, welding wire and welding direction
Horizontal sextant angle is at 75 °, and wherein welding sequence is composite surface soldering and sealing first to groove, then weld overlay, then welding transition layer,
It is subsequently filled weldering, last cosmetic welding；
5th, welding inspection：After the completion of filling weldering, weld is checked, the position for having weld defect removed, then again
Preheating, and carry out second of welding；
6th, welding is completed：After welding inspection is errorless, cosmetic welding is carried out to weld.
Claims (6)
1. pipeline welding process, it is characterised in that：Including following welding step：
Retaining wall on slope：First to the weld of pipeline according to welding procedure sheet progress retaining wall on slope before welding；
Processed before weldering：Inner and outer pipes face at tube groove processing is polished, 1~3cm of inner and outer pipes face at retaining wall on slope is removed
In the range of paint, water stain, miscellaneous dirt and dirt, until tube groove processing at inner and outer pipes face it is smooth without projection；
Welding preparation：Start before welding, pipeline domestic demand is blocked with felt, prevent ventilative in pipeline, while and to pipe to be welded
Road weld when tube wall temperature reaches 80~100 DEG C, stops preheating with being preheated；
Start welding：Pipeline after preheating is welded, wherein welding sequence is composite surface soldering and sealing first to groove, is then welded
Coating is connect, then welding transition layer, is subsequently filled weldering, last cosmetic welding；
Welding inspection：After the completion of filling weldering, weld is checked, the position for having weld defect is removed, it is then again pre-
Heating, and carry out second of welding；
Welding is completed：After welding inspection is errorless, cosmetic welding is carried out to weld.
2. pipeline welding process according to claim 1, it is characterised in that：To the same groove position welding time on pipeline
When number is more than twice, welding times are amputated more than groove position twice, groove position is then selected again and is processed.
3. pipeline welding process according to claim 1, it is characterised in that：When starting welding, the alignment clearance of welding
In 2~3mm.
4. pipeline welding process according to claim 1, it is characterised in that：The horizontal sextant angle of the welding wire and welding direction
Between 70~80 °.
5. pipeline welding process according to claim 1, it is characterised in that：The bevel angle of the welded pipe line be 35~
45°。
6. pipeline welding process according to claim 1, it is characterised in that：It is described when being welded to pipeline, weld slope
Mouth is Y types.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710204162.0A CN107081509A (en) | 2017-03-30 | 2017-03-30 | Pipeline welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710204162.0A CN107081509A (en) | 2017-03-30 | 2017-03-30 | Pipeline welding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107081509A true CN107081509A (en) | 2017-08-22 |
Family
ID=59614445
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710204162.0A Pending CN107081509A (en) | 2017-03-30 | 2017-03-30 | Pipeline welding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107081509A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007130654A (en) * | 2005-11-09 | 2007-05-31 | Nippon Steel Engineering Co Ltd | Temper bead method |
| CN101554671A (en) * | 2008-04-09 | 2009-10-14 | 株式会社神户制钢所 | A welding method |
| CN104551337A (en) * | 2015-01-23 | 2015-04-29 | 中誉远发国际建设集团有限公司 | 30CrMo heat resistant steel pipeline welding construction method |
| CN104801839A (en) * | 2015-04-01 | 2015-07-29 | 中石化工建设有限公司 | Welding technology of austenitic stainless steel and chrome molybdenum heat resistant steel |
| CN104959710A (en) * | 2015-07-09 | 2015-10-07 | 成都振中电气有限公司 | Carbon steel pipe welding technology |
| CN105290569A (en) * | 2014-07-25 | 2016-02-03 | 青岛百键城环保科技有限公司 | Welding process for composite pipeline |
| CN105328307A (en) * | 2014-08-08 | 2016-02-17 | 青岛百键城环保科技有限公司 | Welding process for composite pipeline |
| CN105522258A (en) * | 2014-10-23 | 2016-04-27 | 邵杰 | Composite pipeline welding process |
| CN105983749A (en) * | 2015-01-30 | 2016-10-05 | 重庆广鼎道路设施有限公司 | Pipeline welding process |
| CN105983747A (en) * | 2015-01-30 | 2016-10-05 | 重庆金亚模具制造有限公司 | Welding process for pressure pipelines |
-
2017
- 2017-03-30 CN CN201710204162.0A patent/CN107081509A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007130654A (en) * | 2005-11-09 | 2007-05-31 | Nippon Steel Engineering Co Ltd | Temper bead method |
| CN101554671A (en) * | 2008-04-09 | 2009-10-14 | 株式会社神户制钢所 | A welding method |
| CN105290569A (en) * | 2014-07-25 | 2016-02-03 | 青岛百键城环保科技有限公司 | Welding process for composite pipeline |
| CN105328307A (en) * | 2014-08-08 | 2016-02-17 | 青岛百键城环保科技有限公司 | Welding process for composite pipeline |
| CN105522258A (en) * | 2014-10-23 | 2016-04-27 | 邵杰 | Composite pipeline welding process |
| CN104551337A (en) * | 2015-01-23 | 2015-04-29 | 中誉远发国际建设集团有限公司 | 30CrMo heat resistant steel pipeline welding construction method |
| CN105983749A (en) * | 2015-01-30 | 2016-10-05 | 重庆广鼎道路设施有限公司 | Pipeline welding process |
| CN105983747A (en) * | 2015-01-30 | 2016-10-05 | 重庆金亚模具制造有限公司 | Welding process for pressure pipelines |
| CN104801839A (en) * | 2015-04-01 | 2015-07-29 | 中石化工建设有限公司 | Welding technology of austenitic stainless steel and chrome molybdenum heat resistant steel |
| CN104959710A (en) * | 2015-07-09 | 2015-10-07 | 成都振中电气有限公司 | Carbon steel pipe welding technology |
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| 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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170822 |