CN103506780A - Magnetized steel tube welding process - Google Patents

Magnetized steel tube welding process Download PDF

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Publication number
CN103506780A
CN103506780A CN201210317857.7A CN201210317857A CN103506780A CN 103506780 A CN103506780 A CN 103506780A CN 201210317857 A CN201210317857 A CN 201210317857A CN 103506780 A CN103506780 A CN 103506780A
Authority
CN
China
Prior art keywords
magnetized
welding
steel tube
steel
magnetized 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.)
Withdrawn
Application number
CN201210317857.7A
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Chinese (zh)
Inventor
王自力
聂玉栋
陈玲风
初中新
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.)
CHINA SIXTH METALLURGICAL CONSTRUCTION Co Ltd
Original Assignee
CHINA SIXTH METALLURGICAL CONSTRUCTION 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 CHINA SIXTH METALLURGICAL CONSTRUCTION Co Ltd filed Critical CHINA SIXTH METALLURGICAL CONSTRUCTION Co Ltd
Priority to CN201210317857.7A priority Critical patent/CN103506780A/en
Publication of CN103506780A publication Critical patent/CN103506780A/en
Withdrawn legal-status Critical Current

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    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B23K31/027—Making tubes with soldering or welding

Abstract

The invention provides a magnetized steel tube welding process. The two sides of an end bevel of a magnetized steel tube are respectively provided with a U-type roll in a welded mode so that influences of magnetism in welding can be eliminated, operations are simple and convenient to carry out, cost is little, the effect is obvious, and the magnetized steel tube welding process can be used for welding of any magnetized steel tube.

Description

A kind of steel-pipe welding technique that is magnetized
Technical field
The present invention relates to a kind of pipeline welding process, relate in particular to a kind of pipeline welding process that is magnetized.
Background technology
After steel pipe magnetizes, conventionally can affect the normal welding of pipeline, cannot welding fabrication by conventional method.Traditional demagnetization method mainly contains three kinds: first change design, adopt prefabrication, i.e. and external welding on the scene, connects in.The flange of in Xian factory, being burn-on in steel pipe two ends, then transport to joint connection in site, the impact of strong magnetic field circumstance while having removed job site welding from.Weak point is that pad has increased by one times, carries back and forth steel pipe, and workload is large, long in time limit, and expense increases.It two is that current-carrying coil demagnetization method is welded.On mouth of pipe both sides, put respectively coil (use be RVV), connect resistance pressure regulator and adjust voltage, control size of current, carry out anti-magnetic and process to demagnetization.If use direct current demagnetization, must obtain power supply by DC welder, and in degaussing process, repeatedly adjust and detect, be therefore not easy to obtain satisfied erasure effect.It three is groove contact demagnetization methods.When steel pipe butt welding, can not stay groove gap clearance ，Jiang both sides groove slightly to contact, welding zone influence of magnetic field weakens at once greatly, but can cause welding position intensity to decline, and is not suitable for pressure piping.
Summary of the invention
The defect that complicated operation, expense are high, workload is large, effect is bad facing in order to overcome prior art, the invention provides a kind of easy and simple to handle, expense compared with low, workload is little, the tube welding process that is magnetized of successful.
The technical scheme that the present invention solves its technical problem employing is: adopt " U " shape volume short circuit demagnetization method.According to the quality requirement of welding gap clearance, fix the position that butting grooves is relative, with smooth bar, simmer into " U " shape volume, across being welded in groove both sides, span is unsuitable excessive, as far as possible near groove, round steel leg and pipeline are wanted full weld, in order to the good magnetic field, both sides of connecting, round steel specification should adopt Φ l6-Φ 20, the long 150mm of " U " shape volume two legs, wide will the adapting with groove width of " U " shape volume, 120 ℃ of groove circumference, locate respectively to weld " U " shape volume, just can effectively weaken magnetic field affects welding zone, making " U " shape is to be convenient to the continuous welding of " U " shape door lower nozzle energy.After being soldered, prescind again " U " shape volume, stay down on one weld bond and use.
The invention has the beneficial effects as follows, easy and simple to handle, expense compared with low, workload is little, successful, reliable in quality, technology are simple.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is " U " shape volume short circuit demagnetization schematic diagram.
In figure 1, " U " shape volume, 2, groove, 3, welded still pipe
The specific embodiment
As shown in Figure 1, a kind of being magnetized is suspended to welding procedure, and its operating process is: first, process the groove of the steel pipe that is magnetized according to designing requirement parameter; Secondly, the quality requirement according to welding gap clearance, fixes the position that butting grooves is relative; Then with smooth bar, simmer into " U " shape volume, across being welded in groove both sides, span is unsuitable excessive, and near groove, round steel leg and pipeline are wanted full weld as far as possible; Then according to standard operation, require to weld the steel pipe interface that is magnetized; Finally prescind " U " shape volume, stay down on one weld bond and use.

Claims (3)

1. the steel-pipe welding technique that is magnetized, is characterized in that utilizing " U " row volume to eliminate magnetic interference, has reached the requirement of welding.
2. a kind of steel-pipe welding technique that is magnetized according to claim 1, is characterized in that " U " shape volume should adopt round steel, and round steel specification is φ 16 ~ φ 20, the long 150mm of two legs.
3. a kind of " U " shape for the steel-pipe welding that is magnetized volume according to claim 2, is characterized in that requiring when being magnetized steel-pipe welding full weld.
CN201210317857.7A 2012-08-31 2012-08-31 Magnetized steel tube welding process Withdrawn CN103506780A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210317857.7A CN103506780A (en) 2012-08-31 2012-08-31 Magnetized steel tube welding process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210317857.7A CN103506780A (en) 2012-08-31 2012-08-31 Magnetized steel tube welding process

Publications (1)

Publication Number Publication Date
CN103506780A true CN103506780A (en) 2014-01-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210317857.7A Withdrawn CN103506780A (en) 2012-08-31 2012-08-31 Magnetized steel tube welding process

Country Status (1)

Country Link
CN (1) CN103506780A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111618462A (en) * 2020-04-26 2020-09-04 中国石油天然气集团有限公司 Metal material pipeline girth welding assembly positioning welding method
CN112621031A (en) * 2020-12-07 2021-04-09 上海江南长兴造船有限责任公司 Welding method of magnetized steel plate in ship building process

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB791174A (en) * 1955-12-07 1958-02-26 Birmingham Small Arms Co Ltd Improvements in or relating to welding by fusion-deposition
US3626145A (en) * 1970-02-02 1971-12-07 Armco Steel Corp Magnetic control of arc environment
CN1733408A (en) * 2005-03-25 2006-02-15 兰州理工大学 Magnetic field control method for electric arc welding
CN101148009A (en) * 2007-06-15 2008-03-26 中国铝业股份有限公司 Method for welding metal under strong magnetic field circumstance
CN101412136A (en) * 2008-11-18 2009-04-22 上海市安装工程有限公司 Welding process of large-sized liquefied natural gas storage tank
CN101564807A (en) * 2008-04-25 2009-10-28 株式会社神户制钢所 Backing welding flux used for single-side submerged arc welding and the single-side submerged arc welding method using the same
CN102489844A (en) * 2011-12-27 2012-06-13 上海锅炉厂有限公司 Method for welding magnetized sheet low-temperature steel

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB791174A (en) * 1955-12-07 1958-02-26 Birmingham Small Arms Co Ltd Improvements in or relating to welding by fusion-deposition
US3626145A (en) * 1970-02-02 1971-12-07 Armco Steel Corp Magnetic control of arc environment
CN1733408A (en) * 2005-03-25 2006-02-15 兰州理工大学 Magnetic field control method for electric arc welding
CN101148009A (en) * 2007-06-15 2008-03-26 中国铝业股份有限公司 Method for welding metal under strong magnetic field circumstance
CN101564807A (en) * 2008-04-25 2009-10-28 株式会社神户制钢所 Backing welding flux used for single-side submerged arc welding and the single-side submerged arc welding method using the same
CN101412136A (en) * 2008-11-18 2009-04-22 上海市安装工程有限公司 Welding process of large-sized liquefied natural gas storage tank
CN102489844A (en) * 2011-12-27 2012-06-13 上海锅炉厂有限公司 Method for welding magnetized sheet low-temperature steel

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111618462A (en) * 2020-04-26 2020-09-04 中国石油天然气集团有限公司 Metal material pipeline girth welding assembly positioning welding method
CN112621031A (en) * 2020-12-07 2021-04-09 上海江南长兴造船有限责任公司 Welding method of magnetized steel plate in ship building process

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Application publication date: 20140115