CN106041270A - Automatic pipeline welding method - Google Patents
Automatic pipeline welding method Download PDFInfo
- Publication number
- CN106041270A CN106041270A CN201610477094.0A CN201610477094A CN106041270A CN 106041270 A CN106041270 A CN 106041270A CN 201610477094 A CN201610477094 A CN 201610477094A CN 106041270 A CN106041270 A CN 106041270A
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- China
- Prior art keywords
- welding
- pipeline
- pipelines
- automatic welding
- internal clamp
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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
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- 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
-
- 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
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/06—Tubes
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses an automatic pipeline welding method which is characterized by comprising the following steps: S1, performing U-shaped groove treatment of to-be-welded parts of pipelines; S2, assembling the pipelines subjected to U-shaped groove treatment with an internal clamp with an internal argon filling protection function; S3, performing anti-oxidation treatment; S4, performing welding treatment of the pipelines with hot-wire TIG automatic welding equipment; and S5, performing inspection after welding.
Description
Technical field
The present invention relates to pipeline welding technical field, in particular to a kind of automatic welding of pipelines method.
Background technology
In recent years, the exploitation of domestic and international normal gas pools was the most saturated, and for meeting the market demand, natural gas extraction is gradually to height
The unconventional gas fields such as temperature, peracidity stride forward.About Nock-tem gas field, south, Turkmenistan belongs to high temperature, high pressure, high yield, high Containing Sulfur
Hydrogen, high carbonated, the high chlorion that contains are in " six is high " gas field of one, and tubing is rotten by sulfide stress cracking (SSC), stress
The corrosion of the multiple mechanism crackings such as erosion cracking, hydrogen induced cracking (HIC).In view of the working condition that operation pressure is high, corrosive medium is harsh,
Owing to nickel-base alloy intensity is high, plasticity is good, energy stress corrosion resistant, acid corrosion, the chloride that especially can be suitably used for high concentration is situated between
Matter, its corrosion resistance is significantly better than austenitic stainless steel, and internal collection is defeated has selected composite steel tube.Carbon relative to single metal
Steel, the welding of stainless steel pipes, the welding of Double-metal pipe, the design of grooves of welding joints form, welding method and welding material
The factors such as the selection of material, welding condition are all very different, and welding procedure is complicated, and weld defect is many, the processing of joint
High with matching requirements.
Welding is the most important factor of restriction pipeline construction efficiency, and common TIG soldering method is protected owing to using noble gas
Protecting, arc burning quite stable, weldquality is the most excellent, is the Welder of high-end industrial department welding precision parts first-selection
Process.Its major defect is that welding efficiency is low, is generally suitable for the root weld of small-bore pipeline during pipeline welding, routine
GTAW method has constrained pipeline construction efficiency.
Summary of the invention
It is an object of the invention to provide a kind of automatic welding of pipelines method, to solve the deficiencies in the prior art.
For realizing the object of the invention, the technical scheme of employing is:
A kind of automatic welding of pipelines method, it is characterised in that comprise the following steps:
S1: pipeline is carried out gapless U-shaped groove process and processes；
S2: pipe string；
S3: anti-oxidation process；
S4: pipeline is carried out soldering by heating wire TIG automatic welding equipment；
S5: check after welding.
Further, described step S1 includes following sub-step:
S11: retaining wall on slope, pipeline welding groove type uses the U-shaped groove of monolateral 15 °-20 °；
S12: the U-shaped groove after processing is carried out, polishes in the range of the 25mm of tube groove both sides, Sanding Area to be made
Territory is smooth, then with dehydrated alcohol wiping Sanding Area.
Further, described step S2 includes following sub-step:
S21: load the internal clamp of the interior argon-filled protection function of band, puts into pipeline by the internal clamp of interior for band argon-filled protection function
In, check that boil on the nape opposite the mouth pipeline connects and boil on the nape opposite the mouth is the most accurate, it is ensured that the axiality of pipeline；
S22: internal clamp group pair, opens internal clamp, tensioner internal clamp support claw, and it is right to complete to organize.
Further, described step S3 includes following sub-step:
S31: applying argon gas displaced air in pipeline, for avoiding the coating back side to be aoxidized, should carry out applying argon gas guarantor at the coating back side
Protect；
S32: determination of oxygen content, uses determination of oxygen content instrument to carry out internal oxygen content and measures, it is desirable to internal gas oxygen content is less than
Equal to 150PPM.
Further, described step S4 includes following sub-step:
S41: open heating wire TIG automatic welding equipment；
S42: root bead welds；
S43: packed layer welds；
S44: capping layer welds.
Further, described step S5 includes following sub-step:
S51: visual examination；
S52: nondestructive inspection, uses ray and defect detection on ultrasonic basis to carry out nondestructive inspection detection.
The invention has the beneficial effects as follows,
1, heating wire TIG Full-automatic welding is in the case of pipeline is relatively fixed, and welding tractor drives welding gun along track around pipe
Wall moves, thus realizes automatic welding.All position automatic welding device is by welding tractor, walking track, automatic control system etc.
Part composition.All-position automatic welding technology improves welding quality and labor productivity, alleviates the labor intensity of workman.
2, use heating wire TIG full automatic welding, remain that arc stability, Weld Performance be excellent, owning without TIG welderings such as splashings
Advantage；Can be completely independent control electric arc and heated filament, deposition efficiency is controlled；Use heated filament, deposition rate can be made to increase 50%-100%,
Dilution rate is low, can obtain superior in quality welding point；During hot wire TIG welding, welding wire is heated to 300-500 before being admitted to molten bath
DEG C, the little energy drawn from electric arc, so that deposition efficiency improves 3-5 times than cold wire bond, similar with MIG weldering；Hot wire welding is molten
Changing the filler metal after preheating, total heat input input decreases, and this is conducive to limiting welding deformation；Appearance of weld is attractive in appearance, all
Even, pore-free, the defect such as lack of penetration；Welding high performance material often produces pore, during hot wire welding because of welding wire surface contamination hydrogen
Welding wire temperature is high, and its surface moisture content and pollutant are removed, and hydrogen blistering greatly reduces；Bath superheat temperature is low, and alloying element burns
Damage few；Useful minimum rate of accumulation energy increases the ability of metal deposition, adds heated filament, deposition efficiency can from 50% bring up to 100% with
On, heat input is only increased to 20% by 10%.No matter from efficiency, for quality still uses, hot wire TIG welding's technique is all once to remove from office
Newly, it is the highest that it successfully solves TIG weldering deposition efficiency, and when speed is fast, the defect such as easy undercut, is that of TIG Welding flies
Jump.
3, the ERNiCrMo3 nickel-based welding wire using nickel content to be 60%, it is ensured that welding point has good corrosion resistance
Energy.
4, use gapless U-shaped slope type, effectively reduce incomplete fusion defect, improve welding quality, decrease simultaneously
Root bead layer is because of the risk that corrosion resistance reduces by carbon steel layer dilution.The bevel angle of 15-20 °, both ensure that welding point
There is good fusion character, decrease again the loading of welding wire simultaneously, save engineering cost and improve welding procedure efficiency.
Accompanying drawing explanation
Fig. 1 is the structural representation of the groove that the present invention provides.
Detailed description of the invention
Below by specific embodiment and combine accompanying drawing the present invention is described in further detail.
A kind of automatic welding of pipelines method is:
1, welding procedure design is formulated
1) welding method: for pipeline, selects heating wire TIG Full-automatic welding method；
2) welding material: welding material uses ERNiCrMo3 nickel-based welding wire, it is ensured that the corrosion resistance of welding point.
2, retaining wall on slope
Use gapless U-shaped slope type, effectively reduce incomplete fusion defect, improve welding quality, decrease root bead layer simultaneously
Because of the risk that corrosion resistance reduces by carbon steel layer dilution.Pipeline welding groove type uses the U-shaped groove of monolateral 15 °-20 °,
Both ensure that welding point had good fusion character, decreased again the loading of welding wire simultaneously, and saved engineering cost and improve
Welding procedure efficiency.
3, groove cleans
Require before welding that polishing is clean in the range of the 25mm of groove both sides, polishing region to be made smoothness, expose metallic luster, then use
Dehydrated alcohol wiping.
4, the internal clamp of the interior argon-filled protection function of band is loaded
The internal clamp of argon-filled protection function in band is put into pipeline, checks that boil on the nape opposite the mouth pipeline connects and boil on the nape opposite the mouth is the most accurate, protect
The axiality of card pipeline；Group is less than 0.5mm to gap 0mm, unfitness of butt.
5, internal clamp group pair
Opening internal clamp, tensioner internal clamp support claw, it is right to complete to organize.
6, welded rails and welding tractor are loaded
Loading welded rails, welded rails track is to be installed on pipeline for welding tractor walking and the special mechanism of location, its
Structure directly influence welding tractor walking smoothness and position degree, the most just have influence on welding quality.Welding tractor welds
Dolly is the drive mechanism realizing automatic Arc Welding, and it is arranged on welded rails, circles along tube wall with welding gun,
It it is one of important step realizing mouth of pipe automatic welding.
7, applying argon gas, displaced air in pipeline
For avoiding the coating back side to be aoxidized, applying argon gas protection should be carried out at the coating back side.
8, determination of oxygen content
Use determination of oxygen content instrument to carry out internal oxygen content to measure, it is desirable to internal gas oxygen content is less than or equal to 150PPM.
9, welding equipment is opened
1) line is connected by heating wire TIG welding machine by specification, connect with the mains, and open welding machine and controller；
2) arranging heater current size and welding parameter, the source of welding current only need to arrange heater current size, and other all parameters are equal
Arrange on a remote control；
3) after technological parameter and rifle head being mixed up, welding can be proceeded by, in welding process, by remote controller, to welding
Parameter is finely adjusted, to ensure welding quality.
10, root bead welding
1) before root bead, groove unfitness of butt joint, root face height difference and alignment clearance should be understood, in welding process by welder
In carry out relevant parameter fine setting, with avoid occur root bead defect；
2) during whole root bead, electric arc should be directed at Weld pipe mill welding all the time, should adjust in time when welding gun off-center
Whole, to avoid occurring situation that is unilateral not molten or that burn to occur；
3) root bead joint must carry out polish (owing to easily occurring receiving arc arc crater or crackle when root bead receives arc)；
4) during root bead, arc length should the shortest (the shortest welding wire tungsten electrode easy to stick), the oversize welding forming of arc length can be the most bulging, weldering
Both sides, road form folder ditch；
5) root bead should be advisable to weld joint about 2mm blow-out when receiving arc.
11, packed layer welding operation
1), when using single track direct mode (not swinging) welding, during bevel for welding limit, electric arc is advisable from groove limit 1-2mm.Keep to the side very much
Welding forming is poor, from groove limit too away from easily cause sidewall and do not melt.
2), when using swing mode to weld, swing width should be advisable by 2-3mm less than groove width.If groove width exceedes
During 12mm, it should use shunting to swing welding.
3) in the filling process, if weld folder ditch deep time, it should first folder ditch is polished, then welds.
12, capping layer welding operation
1) during capping, swing width is difficult to excessive, if groove width is more than 12mm, shunting should be used to arrange weldering mode capping, otherwise
Welding bead indent easily occurs.
2) stay about the 0.5mm degree of depth to carry out capping to be advisable.
13, welding is stopped
After stopping welding, close the source of welding current, take off welded rails, remove internal clamp.
14, postwelding inspection
Postwelding is after visual examination is qualified, then uses ray and defect detection on ultrasonic basis to carry out nondestructive inspection detection.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, that is made any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. an automatic welding of pipelines method, it is characterised in that comprise the following steps:
S1: to carrying out U-shaped groove process at pipeline welding；
S2: the pipeline after processing U-shaped groove uses the internal clamp of the interior argon-filled protection function of band by pipe string；
S3: anti-oxidation process；
S4: pipeline is carried out soldering by heating wire TIG automatic welding equipment；
S5: check after welding.
Automatic welding of pipelines method the most according to claim 1, it is characterised in that: described step S1 includes following sub-step
Rapid:
S11: two pipelines carry out U-shaped retaining wall on slope, pipeline welding groove type uses the U-shaped groove of monolateral 15 °-20 °；
S12: the U-shaped groove after processing is carried out, polishes in the range of the 25mm of tube groove both sides, Sanding Area to be made
Territory is smooth, then with dehydrated alcohol wiping Sanding Area.
Automatic welding of pipelines method the most according to claim 2, it is characterised in that: described step S2 includes following sub-step
Rapid:
S21: the internal clamp of argon-filled protection function in band is loaded in two pipelines, checks whether the interface of two pipelines aligns；
S22: open the internal clamp of argon-filled protection function in band, tensioner internal clamp support claw, it is right to complete to organize, it is desirable to two pipelines connect
Gap between Kou is that between 0mm, and two pipe joints, unfitness of butt joint is less than 0.5mm.
Automatic welding of pipelines method the most according to claim 3, it is characterised in that: described step S3 includes following sub-step
Rapid:
S31: the argon of internal clamp is filled with the air that built in pipeline changes in pipeline；
S32: the assay of the oxygen in pipeline, uses determination of oxygen content instrument to carry out pipeline and includes oxygen determination, it is desirable in pipeline
Gas oxygen content is less than or equal to 150PPM.
Automatic welding of pipelines method the most according to claim 4, it is characterised in that: described step S4 includes following sub-step
Rapid:
S41: open heating wire TIG automatic welding equipment；
S42: root bead welds；
S43: packed layer welds；
S44: capping layer welds.
Automatic welding of pipelines method the most according to claim 5, it is characterised in that: described step S5 includes following sub-step
Rapid:
S51: visual examination；
S52: nondestructive inspection, uses ray and defect detection on ultrasonic basis to carry out nondestructive inspection detection.
Automatic welding of pipelines method the most according to claim 1, it is characterised in that also include S0 step:
S0: welding material selects: welding material uses ERNiCrMo3 nickel-based welding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477094.0A CN106041270A (en) | 2016-06-27 | 2016-06-27 | Automatic pipeline welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610477094.0A CN106041270A (en) | 2016-06-27 | 2016-06-27 | Automatic pipeline welding method |
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| Publication Number | Publication Date |
|---|---|
| CN106041270A true CN106041270A (en) | 2016-10-26 |
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ID=57165770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610477094.0A Pending CN106041270A (en) | 2016-06-27 | 2016-06-27 | Automatic pipeline welding method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108608096A (en) * | 2018-05-17 | 2018-10-02 | 四川石油天然气建设工程有限责任公司 | A kind of welding procedure method of oil and gas transmission mechanical composite tube |
| CN108788386A (en) * | 2018-07-03 | 2018-11-13 | 四川石油天然气建设工程有限责任公司 | A kind of welding method of oil and gas transmission composite bimetal pipe |
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| US20140035279A1 (en) * | 2012-08-03 | 2014-02-06 | Lincoln Global, Inc. | Methods and systems of joining pipes |
| CN203459867U (en) * | 2013-08-12 | 2014-03-05 | 辽河石油勘探局 | Internal opening aligning machine with argon filling function |
| CN103612003A (en) * | 2013-11-30 | 2014-03-05 | 西安向阳航天材料股份有限公司 | Full-automatic butt welding technology of bi-metal composite tubes |
| CN103624378A (en) * | 2013-12-02 | 2014-03-12 | 昆山华恒焊接股份有限公司 | Pipeline butt joint hot wire TIG welding method |
| CN105458471A (en) * | 2016-01-19 | 2016-04-06 | 四川石油天然气建设工程有限责任公司 | Pipeline connector welding method |
-
2016
- 2016-06-27 CN CN201610477094.0A patent/CN106041270A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140035279A1 (en) * | 2012-08-03 | 2014-02-06 | Lincoln Global, Inc. | Methods and systems of joining pipes |
| CN203459867U (en) * | 2013-08-12 | 2014-03-05 | 辽河石油勘探局 | Internal opening aligning machine with argon filling function |
| CN103612003A (en) * | 2013-11-30 | 2014-03-05 | 西安向阳航天材料股份有限公司 | Full-automatic butt welding technology of bi-metal composite tubes |
| CN103624378A (en) * | 2013-12-02 | 2014-03-12 | 昆山华恒焊接股份有限公司 | Pipeline butt joint hot wire TIG welding method |
| CN105458471A (en) * | 2016-01-19 | 2016-04-06 | 四川石油天然气建设工程有限责任公司 | Pipeline connector welding method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108608096A (en) * | 2018-05-17 | 2018-10-02 | 四川石油天然气建设工程有限责任公司 | A kind of welding procedure method of oil and gas transmission mechanical composite tube |
| CN108788386A (en) * | 2018-07-03 | 2018-11-13 | 四川石油天然气建设工程有限责任公司 | A kind of welding method of oil and gas transmission composite bimetal pipe |
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Application publication date: 20161026 |
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