CN103706926A - Process for connecting lined stainless steel clad pipes with flanges - Google Patents
Process for connecting lined stainless steel clad pipes with flanges Download PDFInfo
- Publication number
- CN103706926A CN103706926A CN201310414856.9A CN201310414856A CN103706926A CN 103706926 A CN103706926 A CN 103706926A CN 201310414856 A CN201310414856 A CN 201310414856A CN 103706926 A CN103706926 A CN 103706926A
- Authority
- CN
- China
- Prior art keywords
- stainless steel
- inner liner
- welding
- multiple tube
- flange
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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
- B23K9/16—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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
- B23K35/0255—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in welding
- B23K35/0261—Rods, electrodes, wires
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a special process for connecting lined stainless steel clad pipes with flanges. The special process is characterized by comprising safely connecting the lined stainless steel clad pipes with the flanges by means of combined methods of pre-welding preparation, welding material selection and treatment and welding technologies and the like. The special process has the advantages that the lined stainless steel clad pipe connected with the flanges can be connected with other optional equipment such as valves, containers, pipelines and pumps by the identical flanges, accordingly, the purity can be strictly guaranteed when media are delivered by pipelines, pipe bodies of the lined stainless steel clad pipes can be strictly guaranteed against being corroded, and the lined stainless steel clad pipes can be conveniently and quickly connected with the flanges.
Description
Technical field
The present invention relates to bimetal compound pipeline welding technology field, be specifically related to the technique that is connected between a kind of inner liner stainless steel multiple tube and flange.
Background technology
In many modern industries such as oil refining, chemical industry, sewage disposal, pipeline becomes the basic equipment of carrying all kinds of media.In order to keep, the purity of pumped (conveying) medium and health grade or pipeline self are not polluted and corrode by medium, must adopt anticorrosion pipeline.Take carbon steel tubing as base tube, liner ultra-thin stainless steel pipe, the inner liner stainless steel multiple tube forming through synchronous complex technique extruding of modern times, existing stronger resistance to corrosion, price, again significantly lower than same specification stainless steel tube, is fallen over each other to choose by current many chemical industry and sewage treatment industry.Inner liner stainless steel multiple tube, because of its special material structure, when being connected with valve, container, pump and various kinds of equipment, can only adopt flange to connect.
Flange connect have bonding strength high, for convenience detach, the advantages such as fast are installed, but how to realize inner liner stainless steel multiple tube, be connected with the safety between flange, become the most critical link of inner liner stainless steel multiple tube popularization and application.Many producers adopt traditional common solder technology, directly caused multiple tube junction seepage, corrode the serious quality accident such as even explosion.
Summary of the invention
Problem to be solved by this invention is to provide the special welding procedure between a kind of inner liner stainless steel multiple tube and flange, can significantly reduce costs, can carry the free-revving engine of quality by strict guarantee pipeline again to reach.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
1, the cutting of inner liner stainless steel multiple tube:
Available CUT cutting or cold cut are cut.Common employing ￠ 400mm abrasive wheel cutting machine cutting is cut in cold cut, forbids with pipe cutter or oxygen welding cutting.Because inner liner stainless steel multiple tube inner tube stainless steel is very thin, with pipe cutter or lathe cutting, very easily cause inside and outside double layer of metal material separated, with gas welding cutting, more can cause the mouth of pipe uneven.Inner liner stainless steel multiple tube cutting section must be vertical with conduit axis.
2, welding material is selected and is processed:
The flange being connected with inner liner stainless steel multiple tube must be steel flange.The basic electrode of welding material employing and inner liner stainless steel inner layer material homogeneity, its diameter is determined according to inner liner stainless steel tube wall size, and internal layer stainless steel is thinner, and the stainless steel electrode of employing is thinner, generally between ￠ 1.5～￠ 2mm.
Welding rod is processed: before welding rod uses, must dry moisture, in order to avoid produce bubble when welding.Bake out temperature: 300
0～320
0, drying time general control was at 3～3.5 hours.
3, welding:
By flange and inner liner stainless steel multiple tube location, inner liner stainless steel multiple tube is a little less than flange sealing surface D, and D should equal the total wall thickness of inner liner stainless steel multiple tube.
First weld the inner liner stainless steel multiple tube mouth of pipe, with the close weldering of stainless steel electrode, have suffered the mouth of pipe, especially will make the outer carbon steel part of the whole uniform fold multiple tube of stainless steel austenite structure pipe end.Then with stainless steel or ordinary carbon steel welding rod, weld multiple tube tube wall and flange contact portion.
Stainless steel electrode welding, can select direct-flow argon-arc welder argon protection welding, and welding current is controlled within the scope of 80～100 amperes, and argon gas stream can be adjusted between 8～10 liters/min according to actual working environment.
4, check:
The welding slag that welds weld seam is removed totally, carefully observed weld seam must not have pore, pit, face of weld is smooth evenly will note covering inner liner stainless steel multiple tube pipe section especially comprehensively, can not have carbon steel material to appear.To carry out the water pressure test if desired.
The present invention has the following advantage: the inner liner stainless steel multiple tube welding with flange safe, can being connected by identical flange realization and valve, container, pipeline, pump and other arbitrary equipment, not only strict guarantee pure and body self during pipeline pumped (conveying) medium be not corroded, and convenient and swift.
Accompanying drawing explanation
Below the expressed content of this Figure of description 1 and the mark in figure are briefly described:
Accompanying drawing 1 is connected process schematic representation for inner liner stainless steel multiple tube of the present invention with flange welding.
In accompanying drawing 1: 1. inner liner stainless steel multiple tube body, 2. steel flange, 3. welding, the 4. welding of inner liner stainless steel multiple tube tube wall and flange bottom of inner liner stainless steel multiple tube mouth of pipe section and flange.
The specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with accompanying drawing 1 and embodiment, the present invention is described in further detail, this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.
As shown in Figure 1, the compound body of described inner liner stainless steel is comprised of internal layer stainless steel and outer carbon steel, and described flange is comprised of pure stainless steel.Inner liner stainless steel multiple tube after sawing and port reconditioning 1 is injected to pure steel flange 2, and lowly go out flange sealing surface D, D equals the total wall thickness of inner liner stainless steel multiple tube.
With argon arc welding machine, flange inner wall and inner liner stainless steel multiple tube mouth of pipe section are welded completely, make welding material stainless steel austenite structure 3 cover the outer carbon steel part of inner liner stainless steel multiple tube mouth of pipe section completely, thereby avoid the medium of carrying because contact carbon steel material is contaminated or directly etching body completely.
The welding 4 of flange bottom and inner liner stainless steel multiple tube tube wall, available stainless steel electrode or normal carbon steel electrode, object is to strengthen the bonding strength of inner liner stainless steel multiple tube and flange.
Claims (4)
1. inner liner stainless steel multiple tube flange connects a technique, it is characterized in that realizing the connection safely and fast between inner liner stainless steel multiple tube and flange by welding the group technologies such as front preparation, welding material selection and processing and solder technology.
2. according to claim 1, require described a kind of inner liner stainless steel multiple tube flange to connect technique, before described weldering, prepare, it is characterized in that using ￠ 400 abrasive machines or CUT by the sawing of inner liner stainless steel multiple tube and port reconditioning, make mouth of pipe cross section perpendicular in body axis, then enter flange hole, and lowly going out flange sealing surface D, D equals the total wall thickness of inner liner stainless steel multiple tube.
3. according to claim 1, require described a kind of inner liner stainless steel multiple tube flange to connect technique, described welding material and processing, it is characterized in that welding material must select the basic electrode with the identical material of internal layer stainless steel material, diameter is between ￠ 1.5～￠ 2mm, before welding rod uses, must dry moisture, in order to avoid produce bubble, bake out temperature when welding: 300
0～320
0, drying time was controlled between 3～3.5 hours.
4. according to claim 1, require described a kind of inner liner stainless steel multiple tube flange to connect technique, described solder technology, it is characterized in that welding with direct-flow argon-arc welder, welding current is controlled within the scope of 80～100 amperes, argon gas stream can be adjusted between 8～10 liters/min according to actual working environment, and welding material covers contacting of the inner liner stainless steel multiple tube mouth of pipe section pumped (conveying) medium and outer carbon steel to avoid completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310414856.9A CN103706926A (en) | 2013-09-13 | 2013-09-13 | Process for connecting lined stainless steel clad pipes with flanges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310414856.9A CN103706926A (en) | 2013-09-13 | 2013-09-13 | Process for connecting lined stainless steel clad pipes with flanges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103706926A true CN103706926A (en) | 2014-04-09 |
Family
ID=50400475
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310414856.9A Pending CN103706926A (en) | 2013-09-13 | 2013-09-13 | Process for connecting lined stainless steel clad pipes with flanges |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103706926A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801844A (en) * | 2014-02-25 | 2014-05-21 | 芜湖鑫力管道技术有限公司 | Connecting process for lining copper alloy composite tube flange |
| CN105478961A (en) * | 2015-12-31 | 2016-04-13 | 浙江盛达铁塔有限公司 | T-shaped welding method |
| CN114453706A (en) * | 2022-03-08 | 2022-05-10 | 常州市乐萌压力容器有限公司 | Crystallizer driving shaft welding process |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62228786A (en) * | 1985-12-16 | 1987-10-07 | 住友電気工業株式会社 | Method of connecting composite pipe |
| JPH0724584A (en) * | 1993-03-26 | 1995-01-27 | Musashino Eng:Kk | Vacuum joint |
| JPH11291081A (en) * | 1998-04-07 | 1999-10-26 | Futawa Flange Seisakusho:Kk | Welded flange |
| JP2001227689A (en) * | 2000-02-18 | 2001-08-24 | Mie Prefecture | Flanged pipe, connection pipe using the same, and method of manufacturing the flanged pipe |
| CN1840948A (en) * | 2005-03-30 | 2006-10-04 | 钱乐中 | Composite steel pipe with flange and manufacturing method thereof |
| CN101749503A (en) * | 2009-12-29 | 2010-06-23 | 西安向阳航天材料股份有限公司 | Duplex metal compound flange pipe fitting having flange connection on end and manufacturing method thereof |
| JP2010155275A (en) * | 2008-12-26 | 2010-07-15 | Sango Co Ltd | Weld joint and method for manufacturing the same |
| CN102513665A (en) * | 2011-12-09 | 2012-06-27 | 南车眉山车辆有限公司 | Method for welding joints of composite tube |
-
2013
- 2013-09-13 CN CN201310414856.9A patent/CN103706926A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62228786A (en) * | 1985-12-16 | 1987-10-07 | 住友電気工業株式会社 | Method of connecting composite pipe |
| JPH0724584A (en) * | 1993-03-26 | 1995-01-27 | Musashino Eng:Kk | Vacuum joint |
| JPH11291081A (en) * | 1998-04-07 | 1999-10-26 | Futawa Flange Seisakusho:Kk | Welded flange |
| JP2001227689A (en) * | 2000-02-18 | 2001-08-24 | Mie Prefecture | Flanged pipe, connection pipe using the same, and method of manufacturing the flanged pipe |
| CN1840948A (en) * | 2005-03-30 | 2006-10-04 | 钱乐中 | Composite steel pipe with flange and manufacturing method thereof |
| JP2010155275A (en) * | 2008-12-26 | 2010-07-15 | Sango Co Ltd | Weld joint and method for manufacturing the same |
| CN101749503A (en) * | 2009-12-29 | 2010-06-23 | 西安向阳航天材料股份有限公司 | Duplex metal compound flange pipe fitting having flange connection on end and manufacturing method thereof |
| CN102513665A (en) * | 2011-12-09 | 2012-06-27 | 南车眉山车辆有限公司 | Method for welding joints of composite tube |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103801844A (en) * | 2014-02-25 | 2014-05-21 | 芜湖鑫力管道技术有限公司 | Connecting process for lining copper alloy composite tube flange |
| CN105478961A (en) * | 2015-12-31 | 2016-04-13 | 浙江盛达铁塔有限公司 | T-shaped welding method |
| CN114453706A (en) * | 2022-03-08 | 2022-05-10 | 常州市乐萌压力容器有限公司 | Crystallizer driving shaft welding process |
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Application publication date: 20140409 |