CN105983752A - Low-alloy steel pipe welding process - Google Patents
Low-alloy steel pipe welding process Download PDFInfo
- Publication number
- CN105983752A CN105983752A CN201510048199.XA CN201510048199A CN105983752A CN 105983752 A CN105983752 A CN 105983752A CN 201510048199 A CN201510048199 A CN 201510048199A CN 105983752 A CN105983752 A CN 105983752A
- Authority
- CN
- China
- Prior art keywords
- welding
- clearing
- groove
- weld
- alloy steel
- 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
Landscapes
- Arc Welding In General (AREA)
Abstract
The invention discloses a low-alloy steel pipe welding process, characterized by comprising a welding process including the following steps: confirming a groove, clearing two sides of the groove, group seaming, tack welding, back welding, clearing welding splatters, fill welding in layers, cosmetically welding, clearing weld roots, cosmetically welding, clearing welding splatters, auto-checking appearance for qualification, stamping numbers and clearing, nondestructively detecting and clearing, repairing, and nondestructively detecting and clearing; the low-alloy steel pipe welding process of the invention enables strict and reasonable control for parameters of various process stages, the flow is standardized, welding stress and deformation are decreased, and therefore mechanical properties of a welded pipe are improved.
Description
Technical field
The invention belongs to welding procedure field, specifically a kind of low-alloy steel pipeline welding procedure.
Background technology
Low-alloy steel has the features such as high intensity, high tenacity and good combination property, is widely used at industrial circle.It is known that the extensively application of any structural metallic materials depends not only on the performance characteristics of himself, and also rely on the progress of solder technology.At present; low-alloy steel welding mainly uses the welding method that submerged-arc welding, gas shielded arc welding etc. are traditional; though having the advantages such as technical maturity, production cost are low, but have that thermal weld stress amount is big, deformation is big, joint is brittle, be easily generated defect and the problem such as welding production efficiency is low.Along with progress and the development of national economy of science and technology, welding quality, production efficiency and the product quality of low-alloy steel is had higher requirement.Traditional welding method the most can not meet the requirement of welding quality and the production efficiency improved constantly and use traditional welding method by time integrally welded for stainless steel pipes, its heat input is wayward, it is easily caused the poor welding quality of product, then poor mechanical property.
Summary of the invention
The deficiency existed in view of prior art, it is an object of the invention to provide a kind of low-alloy steel pipeline welding procedure, controls each stage process parameter by strict, it is achieved improve mechanical property after pipeline welding.
The technical scheme realizing the object of the invention is as follows:
A kind of low-alloy steel pipeline welding procedure, it is characterised in that this technique comprises the following steps:
A. welding operation flow process: groove confirmation → groove both sides clear up → organize butt welded seam → tack welding → backing welding → cleaning splashing welding slag → layering fill weldering → cosmetic welding → removing root of weld → cosmetic welding → cleaning splashing welding slag → self-inspection visual examination qualified → play steel seal number clearing up → Non-Destructive Testing clear up → reprocess → Non-Destructive Testing and clear up；
B. welding procedure and requirement:
(1) preparation of welding material: welding rod material selects E5015；Core diameter Φ 2.5-3mm, electric current 70-90A
(2) the drying temperature of welding rod is 250-300 DEG C, and baking time is 2-3 hour；
(3) Welded Joints and inspection of edge preparation before welding, root face is 2 ± 1mm, and group is 2 ± 1mm to gap, and groove is 40-60 °, rust in the range of weldment groove face and slope mouth inner and outer side >=25mm, oxide skin, greasy dirt, scale etc. are cleaned out, and must not have the defect such as crackle, interlayer；
(4) should use the pressure fixture such as code, jack during group butt welded seam by weld seam group to gap check and correction uniformly, group is 3 ± 2mm to gap, misalignment≤3mm；
(5) must be fixed with the form of symmetrical spot welding by weldment before welding, tack welding thickness is 1/3-2/3, its a length of 150-220mm of design throat depth, time on tack welding weld seam if any the weld defect such as pore and crackle, it is necessary to removes and rewelds；
(6) backing welding layer height is less than 4mm, when filling weldering, and welding rod teeter, make welding bead surface recessed, and height is less than mother metal surface 1.5mm-2mm, during cosmetic welding, welding pool edge should exceed groove seamed edge 0.5-1.5mm；
(7) thickness 1～2mm of every layer of weld seam during welding；During welding, gesture must steadily, and welding rod swing speed is wanted uniformly, amplitude of fluctuation wants consistent, and weld width is uniform；400 500 millimeters/min of speed of welding when welding.
A kind of low-alloy steel pipeline welding procedure of the present invention has technique each stage strict conservative control of parameter, standard process, reduces welding stress and deformation, thus improves the mechanical property after pipeline welding.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, and its operating procedure is as follows:
A kind of low-alloy steel pipeline welding procedure, this technique comprises the following steps:
A. welding operation flow process: groove confirmation → groove both sides clear up → organize butt welded seam → tack welding → backing welding → cleaning splashing welding slag → layering fill weldering → cosmetic welding → removing root of weld → cosmetic welding → cleaning splashing welding slag → self-inspection visual examination qualified → play steel seal number clearing up → Non-Destructive Testing clear up → reprocess → Non-Destructive Testing and clear up；
B. welding procedure and requirement:
(1) preparation of welding material: welding rod material selects E5015；Core diameter Φ 2.5-3mm, electric current 70-90A
(2) the drying temperature of welding rod is 250-300 DEG C, and baking time is 2-3 hour；
(3) Welded Joints and inspection of edge preparation before welding, root face is 2 ± 1mm, and group is 2 ± 1mm to gap, and groove is 40-60 °, rust in the range of weldment groove face and slope mouth inner and outer side >=25mm, oxide skin, greasy dirt, scale etc. are cleaned out, and must not have the defect such as crackle, interlayer；
(4) should use the pressure fixture such as code, jack during group butt welded seam by weld seam group to gap check and correction uniformly, group is 3 ± 2mm to gap, misalignment≤3mm；
(5) must be fixed with the form of symmetrical spot welding by weldment before welding, tack welding thickness is 1/3-2/3, its a length of 150-220mm of design throat depth, time on tack welding weld seam if any the weld defect such as pore and crackle, it is necessary to removes and rewelds；
(6) backing welding layer height is less than 4mm, when filling weldering, and welding rod teeter, make welding bead surface recessed, and height is less than mother metal surface 1.5mm-2mm, during cosmetic welding, welding pool edge should exceed groove seamed edge 0.5-1.5mm；
(7) thickness 1～2mm of every layer of weld seam during welding；During welding, gesture must steadily, and welding rod swing speed is wanted uniformly, amplitude of fluctuation wants consistent, and weld width is uniform；400 500 millimeters/min of speed of welding when welding.
The preferred embodiment of the present invention described in detail above.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to the design of the present invention without creative work.Therefore, all technical staff in the art, all should be at the protection domain being defined in the patent claims the most on the basis of existing technology by logic minute analysis, reasoning or the available technical scheme of limited experiment.
Claims (1)
1. a low-alloy steel pipeline welding procedure, it is characterised in that this technique comprises the following steps:
A. welding operation flow process: groove confirmation → groove both sides clear up → organize butt welded seam → tack welding → backing welding → cleaning splashing welding slag → layering fill weldering → cosmetic welding → removing root of weld → cosmetic welding → cleaning splashing welding slag → self-inspection visual examination qualified → play steel seal number clearing up → Non-Destructive Testing clear up → reprocess → Non-Destructive Testing and clear up；
B. welding procedure and requirement:
(1) preparation of welding material: welding rod material selects E5015；Core diameter Φ 2.5-3mm, electric current 70-90A
(2) the drying temperature of welding rod is 250-300 DEG C, and baking time is 2-3 hour；
(3) Welded Joints and inspection of edge preparation before welding, root face is 2 ± 1mm, and group is 2 ± 1mm to gap, and groove is 40-60 °, rust in the range of weldment groove face and slope mouth inner and outer side >=25mm, oxide skin, greasy dirt, scale etc. are cleaned out, and must not have the defect such as crackle, interlayer；
(4) should use the pressure fixture such as code, jack during group butt welded seam by weld seam group to gap check and correction uniformly, group is 3 ± 2mm to gap, misalignment≤3mm；
(5) must be fixed with the form of symmetrical spot welding by weldment before welding, tack welding thickness is 1/3-2/3, its a length of 150-220mm of design throat depth, time on tack welding weld seam if any the weld defect such as pore and crackle, it is necessary to removes and rewelds；
(6) backing welding layer height is less than 4mm, when filling weldering, and welding rod teeter, make welding bead surface recessed, and height is less than mother metal surface 1.5mm-2mm, during cosmetic welding, welding pool edge should exceed groove seamed edge 0.5-1.5mm；
(7) thickness 1～2mm of every layer of weld seam during welding；During welding, gesture must steadily, and welding rod swing speed is wanted uniformly, amplitude of fluctuation wants consistent, and weld width is uniform；400 500 millimeters/min of speed of welding when welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510048199.XA CN105983752A (en) | 2015-01-30 | 2015-01-30 | Low-alloy steel pipe welding process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510048199.XA CN105983752A (en) | 2015-01-30 | 2015-01-30 | Low-alloy steel pipe welding process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105983752A true CN105983752A (en) | 2016-10-05 |
Family
ID=57035872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510048199.XA Pending CN105983752A (en) | 2015-01-30 | 2015-01-30 | Low-alloy steel pipe welding process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105983752A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624409A (en) * | 2016-11-29 | 2017-05-10 | 西安长庆科技工程有限责任公司 | Pipeline prefabrication system and method |
| CN106895252A (en) * | 2017-03-10 | 2017-06-27 | 广州增立钢管结构股份有限公司 | A kind of steel pipe and its manufacture method with blocking magnetic conduction construction |
| CN107584190A (en) * | 2017-09-27 | 2018-01-16 | 中国核工业二三建设有限公司 | A kind of pipeline narrow gap automatic welding method for welding |
| CN110091030A (en) * | 2019-05-24 | 2019-08-06 | 江苏格兰环境科技有限公司 | The welding procedure of heating furnace pipeline steel alloy |
| CN110732747A (en) * | 2019-09-16 | 2020-01-31 | 广州文冲船厂有限责任公司 | Welding method |
| CN111604570A (en) * | 2020-06-02 | 2020-09-01 | 陕西华山路桥集团有限公司 | Cellulose vertical downward welding method for pipeline |
| CN113399799A (en) * | 2021-06-18 | 2021-09-17 | 四川华川基业建设集团珑威容器制造有限公司 | Metal joint welding process |
| CN114799769A (en) * | 2022-05-25 | 2022-07-29 | 无锡市新峰管业有限公司 | Manufacturing process and appearance detection device for welded steel pipe |
-
2015
- 2015-01-30 CN CN201510048199.XA patent/CN105983752A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106624409A (en) * | 2016-11-29 | 2017-05-10 | 西安长庆科技工程有限责任公司 | Pipeline prefabrication system and method |
| CN106895252A (en) * | 2017-03-10 | 2017-06-27 | 广州增立钢管结构股份有限公司 | A kind of steel pipe and its manufacture method with blocking magnetic conduction construction |
| CN107584190A (en) * | 2017-09-27 | 2018-01-16 | 中国核工业二三建设有限公司 | A kind of pipeline narrow gap automatic welding method for welding |
| CN107584190B (en) * | 2017-09-27 | 2020-12-15 | 中国核工业二三建设有限公司 | Automatic welding method for narrow gap of pipeline |
| CN110091030A (en) * | 2019-05-24 | 2019-08-06 | 江苏格兰环境科技有限公司 | The welding procedure of heating furnace pipeline steel alloy |
| CN110732747A (en) * | 2019-09-16 | 2020-01-31 | 广州文冲船厂有限责任公司 | Welding method |
| CN111604570A (en) * | 2020-06-02 | 2020-09-01 | 陕西华山路桥集团有限公司 | Cellulose vertical downward welding method for pipeline |
| CN113399799A (en) * | 2021-06-18 | 2021-09-17 | 四川华川基业建设集团珑威容器制造有限公司 | Metal joint welding process |
| CN114799769A (en) * | 2022-05-25 | 2022-07-29 | 无锡市新峰管业有限公司 | Manufacturing process and appearance detection device for welded steel pipe |
| CN114799769B (en) * | 2022-05-25 | 2023-05-23 | 无锡市新峰管业有限公司 | Manufacturing process and appearance detection device of welded steel pipe |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105983752A (en) | Low-alloy steel pipe welding process | |
| CN100450688C (en) | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method | |
| CN104801839B (en) | The welding procedure of austenitic stainless steel and chrome molybdenum heat resisting steel | |
| CN103212913B (en) | A kind of group of large diameter thin wall corrugated stainless steel tubing to and welding method | |
| CN101927390A (en) | Method for welding circumferential weld between metal thin-wall clad layer and base layer of clad pipe | |
| CN104084750B (en) | Submerged arc welding restorative procedure after the wearing and tearing of alkaline compression roller | |
| CN104191095B (en) | A kind of major diameter annular element welding procedure | |
| CN108788410A (en) | T-steel full penetration exempts from back chipping welding method | |
| CN102363239B (en) | Automatic narrow-gap submerged arc welding process for all-welded fixed ball valve with medium and large calibers | |
| CN102465287B (en) | Manufacture method for laser cladded composite pipe with three layers of metals | |
| CN105665898B (en) | A kind of pearlitic heat resistant steel composite board Lincoln weld welding method | |
| CN104551352A (en) | Dissimilar metal welding method | |
| CN103464873B (en) | Electric-arc welding process for Ti alloy and nickel-base high-temperature alloy | |
| CN105033455B (en) | A kind of steel/niobium method for laser welding | |
| CN110421238A (en) | A kind of welding procedure of high intensity cylinder butt welding | |
| CN105983761A (en) | High-strength steel welding process | |
| CN108500429A (en) | A kind of welding method of composite bimetal pipe | |
| CN103752988B (en) | The welding method of corrosion resistant plate | |
| CN105983753A (en) | Ordinary carbon structural steel welding process | |
| CN109530883A (en) | A kind of stainless steel 310S welding procedure | |
| CN105798530A (en) | Fracture repair method for gear reducer output shaft | |
| CN109807438A (en) | A method of for water heater porcelain enamel steel liner girth welding | |
| CN104439616A (en) | 0Cr18Ni9 stainless steel plate welding process | |
| CN104416259A (en) | Welding process of water feed pump of nuclear power plant conventional island | |
| CN102658418A (en) | Novel welding technology for welding water wall tube with spraying layer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161005 |
|
| WD01 | Invention patent application deemed withdrawn after publication |