CN102267015A - Butt welding construction method of stainless steel clad pipes with diameter of not more than 600mm - Google Patents
Butt welding construction method of stainless steel clad pipes with diameter of not more than 600mm Download PDFInfo
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- CN102267015A CN102267015A CN2011102133305A CN201110213330A CN102267015A CN 102267015 A CN102267015 A CN 102267015A CN 2011102133305 A CN2011102133305 A CN 2011102133305A CN 201110213330 A CN201110213330 A CN 201110213330A CN 102267015 A CN102267015 A CN 102267015A
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Abstract
The invention discloses a butt welding construction method, in particular discloses a butt welding construction method of stainless steel clad pipes with the diameter of not more than 600mm, and belongs to the technical field of metal welding production. The butt welding construction method has the advantages of facilitating welding operation and well ensuring welding quality. The butt welding construction method comprises the following steps: firstly machining integral single-sided V-shaped welding grooves with openings towards the outside of pipe walls on base layers and composite layers of the stainless steel clad pipes with the small diameter of not more than 600mm; carrying out butt-joint assembly on the small-diameter stainless steel clad pipes with the qualified machined butt joint grooves; and carrying out manual argon tungsten-arc welding on composite-layer welding seams positioned at root parts of the V-shaped grooves, and then sequentially carrying out manual electric-arc welding on transition-layer welding seams and base-layer welding seams from inside to outside on the radial outer surfaces of the welded composite-layer welding seams until the whole butt-jointed welding seams are completely welded.
Description
Technical field
The present invention relates to a kind of butt welding construction method, especially relate to the butt welding construction method that a kind of diameter is not more than the stainless steel composite pipe of 600mm, belong to the metal solder production technical field.
Background technology
In certain desalinization engineering, the pipe-line system that the company at inventor place is responsible for installing, wherein one is at every evaporator outlet to be arranged 16 φ 600 * 10+2 communicating pipes, is the compound stainless steel composite pipe that forms of 20R and stainless steel this communicating pipe.4 evaporimeters of this project have 64 welding junctions; According to designing requirement, the interface weld seam requires to carry out 100% radiographic inspection, and the II level is qualified.Because the diameter of communicating pipe is φ 600, the little stage that can not weld and use electric tool reconditioning construction at tube interior to personnel, so unconditionally adopt the basic unit of the welding earlier weld seam of multiple tube routine, welding transition layer weld seam again behind the back gouging, weld the welding procedure of composite bed weld seam at last, also just can't adopt basic unit's work sheet V-type bevel for welding, composite bed processing is with respect to the I type bevel for welding of the inside indentation 3-5mm of the peak of basic unit's groove, as shown in Figure 3.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and can make things convenient for welding operation, can well guarantee the butt welding construction method that diameter is not more than the rust steel pipe of 600mm that is used for of welding quality again.
The technical scheme that adopts for solving the problems of the technologies described above is: diameter is not more than the butt welding construction method of the stainless steel composite pipe of 600mm, may further comprise the steps,
A, the diameter that earlier needs is docked are not more than the basic unit and the whole single face V-type bevel for welding of opening outside tube wall of composite bed processing of the path stainless steel composite pipe of 600mm;
B, the path stainless steel composite pipe that will process qualified butt joint groove again dock assembling;
C and then weld to assembling qualified path stainless steel composite pipe, when assembling qualified path stainless steel composite pipe and weld, undertaken by following step, adopt the GTAW welding to be positioned at the composite bed weld seam of double V-groove root earlier, at this simultaneously, the composite bed outside the welding position is filled with protective gas, the back side of the welding pool of groove root composite bed is protected; And then on the radially-outer surface of the composite bed weld seam that welding is finished, adopt manual electric arc welding welding transition layer weld seam and basic unit's weld seam successively from inside to outside, up to complete butt weld of welding.
Further be; when the back side of groove root composite bed welding pool is protected; protective gas is an argon gas, the protection argon gas in the outside of composite bed by manually with the back side that is transported to welding pool of moving of welding pool composite bed being protected by argon-arc welding gun.
The optimal way of such scheme is that the flow that is transported to the protection argon gas in the composite bed outside by argon-arc welding gun is 6～8L/min.
Further be that the welding material that is used for welding transition layer weld seam and basic unit's weld seam is the ENiCrFe-3 welding rod.
Further be, when welding transition layer weld seam and composite bed weld seam, its interlayer temperature is less than 150 ℃, and welding current is got lower limit, weldingvoltage and the speed of welding of welding material operation instructions regulation and got welding material operation instructions set upper limit value.
The invention has the beneficial effects as follows: be processed into the single face V-butt of whole opening to the tube wall outside by butt joint groove with path stainless steel composite pipe basic unit and composite bed; adopt the composite bed weld seam of first bevel for welding root then; then outwards welding transition layer weld seam and basic unit's weld seam successively again; and when the composite bed weld seam of bevel for welding root; fill with protective gas in the outside of composite bed; like this; whole welding operation is carried out from inside to outside successively; thereby make operation become very convenient, weldquality also can get effectively and guarantee.In the welding process of a whole welding junction, all do not need to carry out mechanical back chipping and handle, further simplified operation sequence, improved operability for the compound tubing butt welding of path stainless steel-like.
Description of drawings
Fig. 1 is the butt welding bevel for welding form schematic diagram that the diameter that the present invention relates to is not more than the stainless steel composite pipe of 600mm;
Fig. 2 is the weld seam form schematic diagram that the diameter that the present invention relates to is not more than the stainless steel composite pipe butt welding of 600mm;
Fig. 3 is the groove type schematic diagram of the existing butt joint groove of stainless steel composite pipe that the present invention relates to.
Be labeled as among the figure: basic unit 1, basic unit's weld seam 11, composite bed 2, composite bed weld seam 21, transition zone weld seam 3.
The specific embodiment
Be provided by the inventionly a kind ofly can make things convenient for welding operation as shown in Figure 1 and Figure 2, can well guarantee the butt welding construction method that diameter is not more than the stainless steel composite pipe of 600mm that is used for of welding quality again.Described welding procedure method may further comprise the steps,
A, the diameter that earlier needs is docked are not more than the basic unit 1 and the whole single face V-type bevel for welding of opening outside tube wall of composite bed 2 processing of the path stainless steel composite pipe of 600mm;
B, the path stainless steel composite pipe that will process qualified butt joint groove again dock assembling;
C and then weld to assembling qualified path stainless steel composite pipe, when assembling qualified path stainless steel composite pipe and weld, undertaken by following step, adopt the GTAW welding to be positioned at the composite bed weld seam 21 of double V-groove root earlier, at this simultaneously, composite bed 2 outsides the welding position is filled with protective gas, the back side of the welding pool of groove root composite bed is protected; And then on the radially-outer surface of the composite bed weld seam 21 that welding is finished, adopt manual electric arc welding welding transition layer weld seam 3 and basic unit's weld seam 11 successively from inside to outside, up to complete butt weld of welding.Adopt above-mentioned butt joint groove to be processed into the single face V-butt of whole opening to the tube wall outside with path stainless steel composite pipe basic unit 1 and composite bed 2; adopt the composite bed weld seam 21 of first bevel for welding root then; then outwards welding transition layer weld seam 3 and basic unit's weld seam 11 successively again; and when the composite bed weld seam 21 of bevel for welding root; after construction technology with protective gas is filled in the outside of composite bed 2; whole welding operation is carried out from inside to outside successively; thereby make operation become very convenient, weldquality also can get effectively and guarantee.In the welding process of a whole welding junction, do not need to carry out mechanical back chipping yet and handle, further simplified the welding operation program, improved operability for the compound tubing butt welding of path stainless steel-like.
In the above-mentioned embodiment, for the ease of filling protective gas to the back side of groove root composite bed 2 welding pools, simultaneously in order to improve at high temperature protection effect to stainless steel material, described protective gas is an argon gas, the protection argon gas in the outside of composite bed 2 by manually with the back side that is transported to welding pool of moving of welding pool composite bed 2 being protected by argon-arc welding gun; The flow that is transported to the protection argon gas in composite bed 2 outsides by argon-arc welding gun is 6～8L/min.Can effectively protect the stainless steel at the welding pool back side like this, and easy to operate, protect with low costly, remove the trouble of making complicated auxiliary process device from, reduce production cost.
Owing to after having adopted bevel for welding form of the present invention and welding sequence, when welding transition layer weld seam 3 and basic unit's weld seam 11, all can adopt the ENiCrFe-3 welding rod.When transition zone welds, just need to carry out transition like this with the ER309L welding material, more convenient to operate, reduced the possibility of maloperation, played good guarantee effect to improving welding quality.
Because welding quality is except outside the Pass having with bevel for welding and welding sequence, with welding parameter relation is arranged also, in order to make weldquality reach best, when welding transition layer weld seam 3 and composite bed weld seam 2, its interlayer temperature is less than 150 ℃, and welding current is got lower limit, weldingvoltage and the speed of welding of welding material operation instructions regulation and got welding material operation instructions set upper limit value.
Claims (5)
1. diameter is not more than the butt welding construction method of the stainless steel composite pipe of 600mm, may further comprise the steps,
A, the diameter that earlier needs is docked are not more than the basic unit (1) and the whole single face V-type bevel for welding of opening outside tube wall of composite bed (2) processing of the path stainless steel composite pipe of 600mm;
B, the path stainless steel composite pipe that will process qualified butt joint groove again dock assembling;
C and then weld to assembling qualified path stainless steel composite pipe, when assembling qualified path stainless steel composite pipe and weld, undertaken by following step, adopt the GTAW welding to be positioned at the composite bed weld seam (21) of double V-groove root earlier, at this simultaneously, composite bed (2) outside the welding position is filled with protective gas, the back side of the welding pool of groove root composite bed is protected; And then on the radially-outer surface of the composite bed weld seam (21) that welding is finished, adopt manual electric arc welding welding transition layer weld seam (3) and basic unit's weld seam (11) successively from inside to outside, up to welding complete butt weld.
2. diameter according to claim 1 is not more than the butt welding construction method of the stainless steel composite pipe of 600mm; it is characterized in that: when the back side of groove root composite bed (2) welding pool is protected; protective gas is an argon gas, the protection argon gas in the outside of composite bed (2) by manually with the back side that is transported to welding pool of moving of welding pool composite bed (2) being protected by the argon arc welding welding gun.
3. diameter according to claim 2 is not more than the butt welding construction method of the stainless steel composite pipe of 600mm, it is characterized in that: the flow that is transported to the protection argon gas in composite bed (2) outside by the argon arc welding welding gun is 6～8L/min.
4. diameter according to claim 1 is not more than the butt welding construction method of the stainless steel composite pipe of 600mm, it is characterized in that: the welding material that is used for welding transition layer weld seam (3) and basic unit's weld seam (11) is the ENiCrFe-3 welding rod.
5. be not more than the butt welding construction method of the stainless steel composite pipe of 600mm according to claim 1,2,3 or 4 described diameters, it is characterized in that: when welding transition layer weld seam (3) and composite bed weld seam (2), its interlayer temperature is less than 150 ℃, and welding current is got lower limit, weldingvoltage and the speed of welding of welding material operation instructions regulation and got welding material operation instructions set upper limit value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102133305A CN102267015A (en) | 2011-07-28 | 2011-07-28 | Butt welding construction method of stainless steel clad pipes with diameter of not more than 600mm |
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| CN2011102133305A CN102267015A (en) | 2011-07-28 | 2011-07-28 | Butt welding construction method of stainless steel clad pipes with diameter of not more than 600mm |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106287031A (en) * | 2016-07-27 | 2017-01-04 | 郑州万达重工股份有限公司 | A kind of composite pipe and tube groove form |
| CN111605266A (en) * | 2019-02-22 | 2020-09-01 | 杭州赛富特设备有限公司 | Stainless steel composite device and welding method thereof |
Citations (6)
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| JPH08243754A (en) * | 1995-03-08 | 1996-09-24 | Nippon Steel Corp | Inner face welding method of clad steel tube |
| JPH08267248A (en) * | 1995-03-30 | 1996-10-15 | Kubota Corp | Method for butt welding of clad pipe |
| CN1354061A (en) * | 2000-11-22 | 2002-06-19 | 中国建筑第八工程局工业设备安装公司一公司 | Stainless steel composite pipe welding method |
| CN1546267A (en) * | 2003-12-08 | 2004-11-17 | 西安交通大学 | Welding method for ultra-thin composite layer low-carbon steel - austenitic stainless steel multiple tube adaptor |
| CN101913014A (en) * | 2010-08-24 | 2010-12-15 | 中冶集团华冶资源开发有限责任公司 | Welding method of stainless steel composite board |
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2011
- 2011-07-28 CN CN2011102133305A patent/CN102267015A/en active Pending
Patent Citations (6)
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| JPH08243754A (en) * | 1995-03-08 | 1996-09-24 | Nippon Steel Corp | Inner face welding method of clad steel tube |
| JPH08267248A (en) * | 1995-03-30 | 1996-10-15 | Kubota Corp | Method for butt welding of clad pipe |
| CN1354061A (en) * | 2000-11-22 | 2002-06-19 | 中国建筑第八工程局工业设备安装公司一公司 | Stainless steel composite pipe welding method |
| CN1546267A (en) * | 2003-12-08 | 2004-11-17 | 西安交通大学 | Welding method for ultra-thin composite layer low-carbon steel - austenitic stainless steel multiple tube adaptor |
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| 杨胜金等,1: "316L+20G不锈钢复合管焊接技术", 《焊接》, no. 01, 25 January 2006 (2006-01-25), pages 58 - 61 * |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106287031A (en) * | 2016-07-27 | 2017-01-04 | 郑州万达重工股份有限公司 | A kind of composite pipe and tube groove form |
| CN111605266A (en) * | 2019-02-22 | 2020-09-01 | 杭州赛富特设备有限公司 | Stainless steel composite device and welding method thereof |
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Application publication date: 20111207 |