CN103801844A - Connecting process for lining copper alloy composite tube flange - Google Patents

Connecting process for lining copper alloy composite tube flange Download PDF

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Publication number
CN103801844A
CN103801844A CN201410062732.3A CN201410062732A CN103801844A CN 103801844 A CN103801844 A CN 103801844A CN 201410062732 A CN201410062732 A CN 201410062732A CN 103801844 A CN103801844 A CN 103801844A
Authority
CN
China
Prior art keywords
copper alloy
welding
tube
flange
liner
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
Application number
CN201410062732.3A
Other languages
Chinese (zh)
Inventor
汪正友
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
WUHU XINLI PIPELINE TECHNOLOGY Co Ltd
Original Assignee
WUHU XINLI PIPELINE TECHNOLOGY Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WUHU XINLI PIPELINE TECHNOLOGY Co Ltd filed Critical WUHU XINLI PIPELINE TECHNOLOGY Co Ltd
Priority to CN201410062732.3A priority Critical patent/CN103801844A/en
Publication of CN103801844A publication Critical patent/CN103801844A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K10/00Welding or cutting by means of a plasma
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K28/00Welding or cutting not covered by any of the preceding groups, e.g. electrolytic welding
    • B23K28/02Combined welding or cutting procedures or apparatus
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24BMACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B27/00Other grinding machines or devices
    • B24B27/06Grinders for cutting-off

Abstract

The invention discloses a connecting process for a lining copper alloy composite tube flange. The connecting process is characterized in that the opening of a lining copper alloy composite tube and a flange are connected safely and fast by means of the preparation process before welding, the welding material selection process, the treatment process and the welding technology process. The preparation process before welding is characterized in that an abrasive wheel cutting machine or a plasma cutting machine is used for sawing and polishing the lining copper alloy composite tube so that the cross section of the opening can be perpendicular to the axis of a tube body. The welding material selection process is characterized in that a copper alloy welding rod with texture identical with that of an inner layer copper alloy material is selected and dried. The welding technology process is characterized in that a direct current argon arc welding machine is used, the welding current is controlled to range from 80 amperes to 100 amperes, and argon flow is generally adjusted to be 8-10 liters per minute according to the actual work environment. The connecting process has the advantages that the lining copper alloy composite tube connected with the flange can be connected with any device such as a valve, a container, a pipeline and a pump through the flange of the same specification, purity when the lining copper alloy composite tube conveys media is ensured, the tube body is prevented from being corroded, and use is convenient and fast.

Description

Liner copper alloy multiple tube flange connects technique
Technical field
The present invention relates to bimetal compound pipeline interconnection technique field is installed, be specifically related to liner copper alloy multiple tube flange and connect technique.
Background technology
In fields such as desalinization, heat exchange and urban water supplies, pipeline becomes the basic equipment of carrying all kinds of media.In order to guarantee, the purity of pumped (conveying) medium and health grade and pipeline self are not polluted and corrode by medium, must adopt the pipeline of anticorrosion pipeline and stable chemical performance.Take carbon steel tubing as base tube, liner copper alloy tube, the liner copper alloy multiple tube of producing through synchronous complex technique cold extrusion of modern times, existing strong especially resistance to corrosion and chemical stability, price is again significantly lower than same specification pure copper tube.
Liner copper alloy multiple tube, because of its special material structure, in the time 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 between liner copper alloy multiple tube and flange safety being connected, become the bottleneck of liner copper alloy multiple tube popularization and application.Many producers adopt traditional common solder technology, directly caused liner copper alloy multiple tube and flange connections seepage, corroded the serious quality accidents such as even explosion.
Summary of the invention
Problem to be solved by this invention is to provide a kind of liner copper alloy multiple tube flange and connects technique, to reach both convenient and swift, again can strict guarantee liner copper alloy multiple tube and flange connections is corrosion-resistant, fine and close non-leakage, use the permanent free-revving engine of safety.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
(1) cutting of liner copper alloy multiple tube and port processing:
Available abrasive wheel cutting machine or CUT cutting, forbid with pipe cutter or oxygen welding cutting.Because liner copper alloy multiple tube inner tube copper alloy tube is very thin, with the cutting of pipe cutter or lathe, very easily cause the layering of inner tube copper alloy tube and break, more can cause the mouth of pipe uneven with gas welding cutting.When cutting, necessary strict guarantee liner copper alloy multiple tube cutting section is vertical with multiple tube axis.
2) welding material is selected and pre-welding treatment:
The flange being connected with liner copper alloy multiple tube must be copper alloy flange.The copper alloy electrode of welding material employing and liner copper alloy inner layer material homogeneity, its diameter is determined according to liner copper alloy multiple tube specification, and internal layer copper alloy tube is thinner, and the copper alloy electrode of employing is thinner, generally between ¢ 1.0~¢ 2.5mm.
Pre-welding treatment: before copper alloy electrode uses, must dry moisture, in order to avoid produce bubble in the time of welding.Bake out temperature: 300 0~320 0, drying time general control was at 3~3.5 hours.
3) welding:
By flange and liner copper alloy multiple tube location, liner copper alloy multiple tube is a little less than flange sealing surface D, and D should equal the total wall thickness of liner copper alloy multiple tube.
First weld the liner copper alloy multiple tube mouth of pipe, have suffered the mouth of pipe with the close weldering of copper alloy electrode, especially will make copper alloy organize the outer carbon steel part of whole uniform fold liner copper alloy multiple tube pipe ends.Then weld multiple tube tube wall and flange contact portion with copper alloy electrode or stainless steel electrode.
Copper alloy electrode welding, can select direct-flow argon-arc welder argon protection welding, and welding current is controlled within the scope of 80~90 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 liner copper alloy multiple tube pipe section especially comprehensively, can not have carbon steel material to appear.To carry out if desired the water pressure test.
The present invention has the following advantage: the liner copper alloy multiple tube welding with flange safe, can being connected by the realization of same size flange and valve, container, pipeline, pump and other arbitrary equipment, not only strict guarantee pure and body self when pipeline pumped (conveying) medium be not corroded, and convenient and swift.
Accompanying drawing explanation
Below the mark in this Figure of description 1 expressed content and figure is briefly described:
Accompanying drawing 1 is liner copper alloy multiple tube of the present invention, and flange connects process schematic representation.
In accompanying drawing 1: 1. liner copper alloy multiple tube, the 2. welding of welding, 4. liner copper alloy multiple tube tube wall and the flange bottom of copper alloy flange, 3. liner copper alloy 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, described liner copper alloy multiple tube 1, is made up of internal layer copper alloy tube and outer carbon steel tubing, and described flange is manufactured by copper alloy.Liner copper alloy multiple tube 1 after sawing and port reconditioning is injected to copper alloy flange 2, and low go out flange sealing surface D, D equals the total wall thickness of liner copper alloy multiple tube.
Flange inner wall and liner copper alloy multiple tube mouth of pipe section are welded completely with argon arc welding machine, make welding material 3 cover the outer carbon steel part of liner copper alloy multiple tube mouth of pipe section completely, thereby avoid the medium carried because contact carbon liner copper alloy outer pipe of composite pipe carbon steel tubing is contaminated or have the medium directly etching carbon steel tubing of contaminative completely.
The welding 4 of flange bottom and liner copper alloy multiple tube tube wall, available copper alloy electrode or stainless steel electrode, object is to strengthen the bonding strength of liner copper alloy multiple tube and flange.

Claims (4)

1. a kind ofliner copper alloy multiple tube flange connects technique, it is characterized in that: prepare by comprising before weldering, the group technology such as welding material selection and processing and solder technology realizes the connection safely and fast between liner copper alloy multiple tube and flange.
2. according to claim 1, described in a kind ofliner copper alloy multiple tube flange connects technique, it is characterized in that: prepare before described weldering, be with abrasive wheel cutting machine or CUT by the sawing of inner liner stainless steel multiple tube reconditioning sawing rear port, make port cross section perpendicular in body axis.
3. according to claim 1, described in a kind ofliner copper alloy multiple tube flange connects technique, it is characterized in that: described welding material is selected and processed, and comprises the copper alloy electrode of selecting with the identical material of internal layer Cu alloy material, before welding rod uses, must dry moisture, in order to avoid produce bubble in the time of welding.
4. according to claim 1, described in a kind ofliner copper alloy multiple tube flange connects technique, it is characterized in that: described solder technology, comprise and 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 liner copper alloy multiple tube mouth of pipe section completely.
CN201410062732.3A 2014-02-25 2014-02-25 Connecting process for lining copper alloy composite tube flange Pending CN103801844A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410062732.3A CN103801844A (en) 2014-02-25 2014-02-25 Connecting process for lining copper alloy composite tube flange

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410062732.3A CN103801844A (en) 2014-02-25 2014-02-25 Connecting process for lining copper alloy composite tube flange

Publications (1)

Publication Number Publication Date
CN103801844A true CN103801844A (en) 2014-05-21

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410062732.3A Pending CN103801844A (en) 2014-02-25 2014-02-25 Connecting process for lining copper alloy composite tube flange

Country Status (1)

Country Link
CN (1) CN103801844A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077910A (en) * 2016-07-07 2016-11-09 张利 A kind of welding method of oil filling pipe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN103706926A (en) * 2013-09-13 2014-04-09 汪正友 Process for connecting lined stainless steel clad pipes with flanges

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CN103706926A (en) * 2013-09-13 2014-04-09 汪正友 Process for connecting lined stainless steel clad pipes with flanges

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077910A (en) * 2016-07-07 2016-11-09 张利 A kind of welding method of oil filling pipe

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Application publication date: 20140521