CN1354061A - Stainless steel composite pipe welding method - Google Patents
Stainless steel composite pipe welding method Download PDFInfo
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- CN1354061A CN1354061A CN 00129337 CN00129337A CN1354061A CN 1354061 A CN1354061 A CN 1354061A CN 00129337 CN00129337 CN 00129337 CN 00129337 A CN00129337 A CN 00129337A CN 1354061 A CN1354061 A CN 1354061A
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Abstract
The present invention relates to a welding method of composite pipe, and is characterized by that for stainless steel composite layer it adopts argon arc welding process, the welding thickness is equal to the thickness of stainless steel composite layer material; between the stainless steel composite layer and carbon steel base layer, transition layer electrowelding process is adopted then for carbon steel base layer, electrowelding process is adopted. Said invented welding method raises welding quality, and can make welding one-time radial test up-to-standard rate be raised to above 97% from about 40%.
Description
The present invention relates to the welding method of stainless steel, carbon steel composite, particularly relate to the welding method of a kind of stainless steel, carbon steel composite tube.
Do not find the welding method of similar stainless steel, carbon steel composite tube as yet through the Chinese patent retrieval, present similar welding method is to adopt stainless steel welding stick or welding rod is disposable that composite bed and basic unit are welded together, no transition zone, and then welding basic unit, welding exists moisture, gas, oil stain, impurity between basic unit and the composite bed all to enter weldering meat like this, causes producing in the weld seam defectives such as gas, slag inclusion, on average once be welded into power and have only about 40%, hindered construction greatly.
The objective of the invention is: a kind of reasonable welding method is provided, and to improve product percent of pass, minimizing is done over again, and accelerating construction progress increases economic benefit.
For reaching above-mentioned purpose, adopt following welding method: the compound layer 2 of stainless steel adopts argon arc welding, and welding wire is selected stainless steel for use; The weldering meat thickness of the compound layer of stainless steel weld seam 4 equals the compound layer of stainless steel 2 material thickness; Carry out transition zone 5 electric welding welding between compound layer 2 of stainless steel and the carbon steel base layer 1, welding rod is selected stainless steel for use; Before transition zone 5 welding, check that the surface has or not crack, defective such as concavo-convex, after processing meets specification requirement on inspection, carry out transition zone 5 welding, after having welded, welding slag, the splash in trimming and the groove again, and carry out surface inspection and have or not weld defect, carry out last behind the zero defect again all over carbon steel base layer weld seam 6 electric welding welding, welding rod is selected stainless steel for use.
The present invention has obtained success in actual use, avoided pore that conventional welding method occurs easily, defective such as lack of penetration, improved welding quality greatly, radiographic inspection qualification rate of welding is reached more than 97%, reduced and done over again, just promoted the use of in our unit.
Description of drawings:
Figure one is a stainless steel composite pipe welding schematic diagram.
Figure two is stainless steel composite pipe structural representations.
The contrast description of drawings; Among the figure one: 1, carbon steel base layer; 2, the compound layer of stainless steel; 3, bevel angle; 4, the compound layer of stainless steel weld seam; 5, transition zone weld seam; 6, carbon steel base layer weld seam.
With reference to accompanying drawing: embodiments of the present invention is further illustrated: with 20# steel and stainless steel composite pipe is example, among the figure one: 1, basic unit: 20# steel, wall thickness 6mm; 2, composite bed: stainless steel, wall thickness 2mm; 3, bevel angle is 60 °; 4, the compound layer of stainless steel weld seam, the weld seam welding wire is selected for use: the stainless steel welding stick of Ф 1.6mm, welding manner adopts manual argon arc welding, at first groove is adopted machining, the flatness of pipeline end face is no more than 0.5mm, the groove face that processes must not have crackle, the layering step, impurity such as greasy dirt, and remove the burr at place, mouth of pipe inside edge with pointed sanding machine, impurity etc., reach smooth, weld seam counterpart gap 1-2mm, the pipeline unfitness of butt joint is no more than 0.5mm, the mouth of pipe is to getting well the back along even spot welding 3 points of welded tube week, spot welding length 20-30mm, thickness is identical with the compound layer of stainless steel 2 wall thickness, the pore of spot welding place, crackle is rewelded after must removing totally, warp is to the spot welding inspection, handle qualified laggard line pipe mouth full weld, composite bed weld seam 4 is identical with the compound layer of stainless steel 2 wall thickness, after welding finishes, check that there are defectives such as free from flaw on the compound layer of stainless steel weld seam 4 surfaces, after checking that processing is qualified, carry out 5 welding of next procedure transition zone, welding rod is selected for use: Ф 2.5mm stainless steel electrode, and the method for employing short arc continuous welding, transition zone 5 weldering meat thickness are about 1/3 of carbon steel base layer 1 thickness; After transition zone 5 welding finishes, trimming impurity again, on inspection, handle qualified after, carry out last again all over 6 welding of carbon steel base layer weld seam, welding rod is selected for use: Ф 3.2mm stainless steel electrode.
Claims (1)
1, the welding method of a kind of carbon steel, stainless steel composite pipe connection, the compound layer 2 of stainless steel uses argon arc weldings, and welding wire is selected stainless steel for use; Carbon steel base layer 1 uses electric welding, welding rod is selected stainless steel for use, it is characterized in that carrying out transition zone 5 electric welding welding between compound layer 2 of stainless steel and the carbon steel base layer 1, welding rod is selected stainless steel for use, and the thickness of the compound layer of stainless steel weld seam 4 equals the compound layer of stainless steel 2 material thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00129337 CN1354061A (en) | 2000-11-22 | 2000-11-22 | Stainless steel composite pipe welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00129337 CN1354061A (en) | 2000-11-22 | 2000-11-22 | Stainless steel composite pipe welding method |
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| CN1354061A true CN1354061A (en) | 2002-06-19 |
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| CN 00129337 Pending CN1354061A (en) | 2000-11-22 | 2000-11-22 | Stainless steel composite pipe welding method |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415436C (en) * | 2004-09-16 | 2008-09-03 | 吉欣（英德）热轧不锈复合钢有限公司 | Method for producing cold rolling continuous welding metal inner composite pipe |
| WO2009003326A1 (en) * | 2007-06-29 | 2009-01-08 | Mengjie Yan | A process for continuous welding a composite pipe with outer stainless cladding layer |
| CN100450688C (en) * | 2007-07-04 | 2009-01-14 | 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 |
| CN101474703B (en) * | 2009-01-21 | 2011-04-06 | 东方锅炉（集团）股份有限公司 | Seal welding method of shell type heat exchanger pipe sheet stainless steel composite layer and carbon steel tube |
| CN102152125A (en) * | 2011-03-01 | 2011-08-17 | 何甜灶 | Production method and device for manufacturing composite pipe from composite stainless steel plate by hot rolling |
| CN102267015A (en) * | 2011-07-28 | 2011-12-07 | 四川电力建设三公司 | Butt welding construction method of stainless steel clad pipes with diameter of not more than 600mm |
| CN101774063B (en) * | 2010-01-12 | 2012-02-15 | 孙伟松 | Defect repair welding process of stainless steel composite board coating |
| CN101543928B (en) * | 2009-05-11 | 2012-04-18 | 辽河石油勘探局 | Compound pipeline welding process of L245NB+316L |
| CN102513713A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Welding method for stainless steel composite board pressure vessel shell and insert-type stainless steel connecting pipe |
| CN103358036A (en) * | 2013-07-18 | 2013-10-23 | 大连三高集团有限公司 | Welding technology for stainless steel composite tubes |
| CN103521899A (en) * | 2013-10-09 | 2014-01-22 | 哈尔滨工业大学 | Welding method for manufacturing composite pipe through composite plate |
| CN103737187A (en) * | 2014-02-11 | 2014-04-23 | 芜湖鑫力管道技术有限公司 | Direct connection welding mounting process for stainless steel-lined composite pipes |
| CN104625341A (en) * | 2014-12-06 | 2015-05-20 | 常熟市东鑫钢管有限公司 | Composite stainless steel pipe circumferential-weld welding process |
| CN104801826A (en) * | 2015-03-24 | 2015-07-29 | 中国海洋石油总公司 | Bimetal composite pipe both-side welding process |
| CN104801832A (en) * | 2015-04-28 | 2015-07-29 | 斯必克冷却技术（张家口）有限公司 | Welding method for pipe end of pipe bundle for direct air cooling system |
| CN111673217A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Method for welding composite board on single surface by adopting ceramic liner |
| CN113579426A (en) * | 2021-06-18 | 2021-11-02 | 中国化学工程第十四建设有限公司 | Welding method for stainless steel pipeline lined in butt joint section |
| CN113770662A (en) * | 2021-10-16 | 2021-12-10 | 博众不锈钢有限公司 | Method for manufacturing small-caliber bimetal composite welded steel pipe |
-
2000
- 2000-11-22 CN CN 00129337 patent/CN1354061A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100415436C (en) * | 2004-09-16 | 2008-09-03 | 吉欣（英德）热轧不锈复合钢有限公司 | Method for producing cold rolling continuous welding metal inner composite pipe |
| WO2009003326A1 (en) * | 2007-06-29 | 2009-01-08 | Mengjie Yan | A process for continuous welding a composite pipe with outer stainless cladding layer |
| CN100498031C (en) * | 2007-06-29 | 2009-06-10 | 吉欣（英德）热轧不锈复合钢有限公司 | Manufacturing method of continuous welding metal composited tube covered with stainless steel |
| CN100450688C (en) * | 2007-07-04 | 2009-01-14 | 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 |
| CN101474703B (en) * | 2009-01-21 | 2011-04-06 | 东方锅炉（集团）股份有限公司 | Seal welding method of shell type heat exchanger pipe sheet stainless steel composite layer and carbon steel tube |
| CN101543928B (en) * | 2009-05-11 | 2012-04-18 | 辽河石油勘探局 | Compound pipeline welding process of L245NB+316L |
| CN101774063B (en) * | 2010-01-12 | 2012-02-15 | 孙伟松 | Defect repair welding process of stainless steel composite board coating |
| CN102152125B (en) * | 2011-03-01 | 2014-12-10 | 何甜灶 | Production method and device for manufacturing composite pipe from composite stainless steel plate by hot rolling |
| CN102152125A (en) * | 2011-03-01 | 2011-08-17 | 何甜灶 | Production method and device for manufacturing composite pipe from composite stainless steel plate by hot rolling |
| CN102267015A (en) * | 2011-07-28 | 2011-12-07 | 四川电力建设三公司 | Butt welding construction method of stainless steel clad pipes with diameter of not more than 600mm |
| CN102513713A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Welding method for stainless steel composite board pressure vessel shell and insert-type stainless steel connecting pipe |
| CN103358036A (en) * | 2013-07-18 | 2013-10-23 | 大连三高集团有限公司 | Welding technology for stainless steel composite tubes |
| CN103358036B (en) * | 2013-07-18 | 2016-08-24 | 大连三高集团有限公司 | A kind of production stainless steel composite pipe welding procedure |
| CN103521899A (en) * | 2013-10-09 | 2014-01-22 | 哈尔滨工业大学 | Welding method for manufacturing composite pipe through composite plate |
| CN103521899B (en) * | 2013-10-09 | 2016-01-20 | 哈尔滨工业大学 | A kind of welding method being prepared multiple tube by composite plate |
| CN103737187A (en) * | 2014-02-11 | 2014-04-23 | 芜湖鑫力管道技术有限公司 | Direct connection welding mounting process for stainless steel-lined composite pipes |
| CN104625341A (en) * | 2014-12-06 | 2015-05-20 | 常熟市东鑫钢管有限公司 | Composite stainless steel pipe circumferential-weld welding process |
| CN104801826A (en) * | 2015-03-24 | 2015-07-29 | 中国海洋石油总公司 | Bimetal composite pipe both-side welding process |
| CN104801826B (en) * | 2015-03-24 | 2017-07-11 | 中国海洋石油总公司 | The process of composite bimetal pipe two-sided welding |
| CN104801832A (en) * | 2015-04-28 | 2015-07-29 | 斯必克冷却技术（张家口）有限公司 | Welding method for pipe end of pipe bundle for direct air cooling system |
| CN111673217A (en) * | 2020-05-11 | 2020-09-18 | 首钢集团有限公司 | Method for welding composite board on single surface by adopting ceramic liner |
| CN113579426A (en) * | 2021-06-18 | 2021-11-02 | 中国化学工程第十四建设有限公司 | Welding method for stainless steel pipeline lined in butt joint section |
| CN113770662A (en) * | 2021-10-16 | 2021-12-10 | 博众不锈钢有限公司 | Method for manufacturing small-caliber bimetal composite welded steel pipe |
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