CN108608096A - A kind of welding procedure method of oil and gas transmission mechanical composite tube - Google Patents
A kind of welding procedure method of oil and gas transmission mechanical composite tube Download PDFInfo
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- CN108608096A CN108608096A CN201810472542.7A CN201810472542A CN108608096A CN 108608096 A CN108608096 A CN 108608096A CN 201810472542 A CN201810472542 A CN 201810472542A CN 108608096 A CN108608096 A CN 108608096A
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Classifications
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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
- 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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
- B23K33/004—Filling of continuous seams
-
- 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
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar seams
- B23K9/0282—Seam welding; Backing means; Inserts for curved planar seams for welding tube sections
-
- 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)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The present invention provides a kind of welding procedure methods of oil and gas transmission mechanical composite tube.The mechanical composite tube is made of liner layer and base, and the welding procedure method includes the following steps：Built-up welding is carried out to mechanical composite tube welding ends；The welding ends of mechanical composite tube is processed into the U-shaped groove of gapless group pair, the root extended length of the groove is 0.8mm~1.2mm, and the width of root face is 2.5mm~3.0mm；Groove group pair is completed, anti-oxidation processing is carried out to welding ends；The base metals penetration ratio for controlling graded seal between liner layer and base is 20%~30%, controls welding material ingredient, completes the root bead to composite bimetal pipe welding ends, transition weldering, filling weldering and cosmetic welding.The welding procedure method of the present invention can improve the stress situation of butt weld, and Crack prevention generates, simplifies welding procedure, improve welding efficiency.
Description
Technical field
The present invention relates to pipeline welding technology fields, will more specifically it is multiple to be related to a kind of oil and gas transmission machinery
The welding procedure method for closing pipe is particularly suitable for the machine to acidic corrosives petroleum gases such as conveying particle containing chlorine, hydrogen sulfide
Tool multiple tube is welded.
Background technology
It is soldering and sealing, root bead, transition weldering, filling weldering and lid in existing liner mechanical composite tube construction method welding process
It welds in face.The shortcomings of it is more that there are working procedures, and welding bead design is complicated.If without strictly monitoring welding quality, it is likely to result in
Weldquality hidden danger, such as soldering and sealing layer penetration cause liner corrosion resistant alloy to be diluted.
Invention content
It is above-mentioned existing in the prior art it is an object of the present invention to solving for the deficiencies in the prior art
One or more problems.For example, one of the objects of the present invention is to provide one kind capable of reducing mechanical composite tube site welding work
Sequence can improve the welding procedure method of the mechanical composite tube of welding quality and efficiency.
To achieve the goals above, the present invention provides a kind of welding of the mechanical composite tube of oil and gas transmission to apply
Work method.The mechanical composite tube is made of liner layer and base, and the welding procedure method may comprise steps of：To machine
Tool composite tube welding end carries out built-up welding；The welding ends of mechanical composite tube is processed into the U-shaped groove of gapless group pair, the groove
Root extended length be 0.8mm~1.2mm, the width of root face be 2.5mm~3.0mm；Groove group pair is completed, welding ends is carried out
Gas shield is handled；The base metals penetration ratio for controlling graded seal between liner layer and base can be 20%~30%, control
Welding material ingredient processed completes the root bead to composite bimetal pipe welding ends, transition is welded, filling is welded and cosmetic welding.
An exemplary embodiment of the welding procedure method of mechanical composite tube is answered in the oil and gas transmission of the present invention
In, the liner layer of the mechanical composite tube can be stainless steel or nickel-base alloy, and base can be mild steel or low-alloy pipeline
Steel.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, the bevel angle of the groove can be 19 °~29 °, and groove chamfering can be 3.0mm~3.4mm
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, it is described that carry out anti-oxidation processing to welding ends include carrying out gas shield to the front of weld seam and being carried out to the back side of weld seam
Gas shield, the back side to weld seam carry out the Internal architecture air dam that gas shield is included in mechanical composite tube.It is described to construct
Material used in the both ends of air dam is the material for being easy to discharge line, and the distance of the both ends material is 200mm~300mm.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, opening width of the groove group to after is 12mm~15mm.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, the selection of the welding material includes selection welding material identical with liner composition of layer when carrying out root bead, is carried out
Different steel weld material is selected when crossing weldering, filling weldering and cosmetic welding.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, the welding of the mechanical composite tube is compound to machinery for 58%~62% Nickel-based Alloy Welding material including the use of nickel content
Pipe carries out root bead, transition weldering, filling weldering and cosmetic welding.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, the root bead to composite bimetal pipe welding ends, transition weldering, filling weldering and the cosmetic welding completed includes that manual tungsten may be used
Electrode argon arc welding carries out root bead to liner layer and base and transition is welded, and welding electrode arc welding may be used and welded to base.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, it is described complete to weld the root bead of composite bimetal pipe welding ends, transition, filling weldering and cosmetic welding include using heating wire TIG into
Row welding.
In an exemplary embodiment of the welding procedure method of the oil and gas transmission mechanical composite tube of the present invention
In, it is described to carry out weld preheating when being welded to mechanical composite tube, interlayer temperature control when welding 100 ° with
Under.
Compared with prior art, the advantageous effect of welding procedure method of the present invention includes：
(1) welding process flow of traditional mechanical composite tube is changed, heap is carried out to the pipe end of mechanical composite tube first
Weldering, can improve the stress situation of butt weld, be capable of the generation of Crack prevention.
(2) construction technology of mechanical composite tube site welding can be reduced, operation is simplified.
(3) groove of the design present invention can improve welding efficiency in conjunction with the welding procedure of the present invention, ensure welding matter
Amount.
Description of the drawings
By the description carried out below in conjunction with the accompanying drawings, above and other purpose of the invention and feature will become more clear
Chu, wherein：
Fig. 1 shows the welding procedure of the oil and gas transmission mechanical composite tube of an illustrative embodiment of the invention
The flow diagram of method.
Fig. 2 shows the welding procedures of the oil and gas transmission mechanical composite tube of an illustrative embodiment of the invention
The finished edge structural schematic diagram of method.
Fig. 3 shows the welding procedure of the oil and gas transmission mechanical composite tube of an illustrative embodiment of the invention
Method constructs air dam schematic diagram.
Specific implementation mode
Hereinafter, oil and gas transmission according to the present invention will be described in detail in conjunction with attached drawing and exemplary embodiment
With the welding procedure method of mechanical composite tube.
Specifically, multiple for the machinery of the petroleum gas of the acidic corrosive medias such as conveying particle containing chlorine, hydrogen sulfide
The welding for closing pipe needs to ensure welding quality, improves the efficiency of welding.The welding procedure method of the present invention first carries out pipe end
Then built-up welding is directed to the groove that the welding design of the mechanical composite tube matches, is finally welded to root bead, transition weldering, filling
It is controlled with cosmetic welding, can be good at shortening welding process flow, ensure welding quality, improve welding efficiency.
Fig. 1 shows the welding procedure of the oil and gas transmission mechanical composite tube of an illustrative embodiment of the invention
The process flow diagram of method.It is multiple with machinery that Fig. 2 shows the oil and gas transmissions of an illustrative embodiment of the invention
Close the finished edge structural schematic diagram of the welding procedure method of pipe.Fig. 3 shows the oil of an illustrative embodiment of the invention
The welding procedure method of natural gas transportation mechanical composite tube constructs air dam schematic diagram.
The present invention provides a kind of welding procedure methods of oil and gas transmission mechanical composite tube.In the stone of the present invention
In one exemplary embodiment of the welding procedure method of oily natural gas transportation mechanical composite tube, the mechanical composite tube refers to
The bimetallic mechanical multiple tube being made of the liner layer as base and as coating.The liner layer of the mechanical composite tube can be with
For corrosion resisting alloys such as stainless steel, nickel-base alloys, base can be mild steel or low-alloy pipe line steel etc..It should be noted that this
The mechanical composite tube of invention refers to that the petroleum gas machinery for conveying the acidic corrosive medias such as particle containing chlorine, hydrogen sulfide is compound
Pipe.As shown in Figure 1, the welding procedure method may include：
Step S01 carries out built-up welding to mechanical composite tube welding ends.
In the welding procedure of traditional oil and gas transmission mechanical composite tube, usually first welding ends is sealed
Weldering.But the soldering and sealing layer formed after welding ends soldering and sealing can cause the liner layer alloy of mechanical composite tube to be corroded.The present invention changes
Traditional welding procedure carries out built-up welding to the welding ends of mechanical composite tube first, avoids unnecessary soldering and sealing, eliminate possibility
Existing security risk, improves welding quality.
Step S02 carries out retaining wall on slope to the mechanical composite tube welding ends of heap postwelding.
Welding groove design has important influence to the welding difficulty and quality of pipeline.The groove of design should consider groove
Easy making process and welding convenience, also to consider welding after the completion of internal stress to acid medium pipeline-weld service safety
Influence.It designs bad groove and is unfavorable for field pipes welding, welding difficulty can be increased, be unfavorable for pushing away for welding procedure
Wide application.And larger internal stress may be will produce after the completion of groove welding, increase the risk of pipe stress corrosion cracking.
The groove that the present invention designs neither increases welding operation difficulty, and will not generate shadow to the stress corrosion resistant ability of pipeline-weld
It rings.
As shown in Fig. 2, the groove that the present invention designs is the U-shaped groove of gapless group pair.The groove parameter of design be intended to
Mechanical composite tube itself is closely coordinated.The main control parameters of the groove include bevel angle β, groove chamfering R, root
L and width of root face P is stretched out in portion.Wherein, the control molding major parameter in root includes that L and width of root face P is stretched out in root.At this
The liner layer of invention is during the composite tube welding of stainless steel or corrosion-resistant nickel-based alloy, it is desirable that has to alloying element smaller
It waters down.Therefore the U-shaped groove of multiple tube is often designed larger root and is stretched out, generally 2 to 3mm.Inventor the study found that
In carbon steel welding, the problem of being watered down without the concern for alloying element, the main function that root is stretched out is to facilitate arc conducts hot
It measures to the root of weld.Therefore, the present invention reduces root extension elongation to 1.0 ± 0.2mm, it is preferred that root extension elongation can
0.9mm~1.1mm is thought, it is furthermore preferred that can be 1.0mm.The width of root face is that the control gapless counterpart root of weld is molding
Key, the excessive width of root face will lead to not, by root face burn through, cause incomplete root penetration.The too small width of root face is be easy to cause
The defects of internal concave at root.In traditional composite tube welding, generally the width of root face is controlled in 1.8mm~2.0mm.But due to carbon
Steel welding pool has the better mobility of opposite high alloy material, therefore suitably increases the width of root face in groove design.
Inventor has found that the width of root face variation tolerance that carbon steel is welded to gapless counterpart is larger in welding operating process, for ease of
Retaining wall on slope and transhipment, therefore it by the width of root face can be 2.5mm~3.0mm to design, it is preferred that the width of root face can be
2.7mm~2.9mm, it is furthermore preferred that can be 2.9mm.
The main influence for considering welding stress and welding operability of the design of bevel angle β.The size of bevel angle influences
The distribution of weld stress.Welding stress is concentrated on the direction of tensile stress by too small bevel angle, increases carbon steel and low conjunction
Golden steel stress corrosion cracking.On the contrary, suitable bevel angle can effectively avoid the generation of side wall incomplete fusion defect.Therefore, originally
The welding procedure method of invention is directed to above-mentioned mechanical composite tube, and bevel angle is set as 19 °~29 °.Preferably, Ke Yiwei
21 °~26 °.For example, when the tube wall thickness of mechanical composite tube is in 8mm~12mm, in conjunction with welding, operational and weld seam is corrosion-resistant wants
It asks, unilateral 12 ° of welding grooves design may be used, is i.e. bevel angle is 24 °.The chamfering of groove could be provided as 3.0mm~
3.4mm, it is preferred that the chamfering of groove could be provided as 3.2mm.The groove of the above parameter is designed, has group to efficient, welding
The small advantage of loading especially suitable for improving the speed of welding of root bead, while reducing the weld metal deposition amount of filling weldering, carries
High welding efficiency.
Step S03 completes groove group pair, and gas shield processing is carried out to welding ends.
After the completion of retaining wall on slope, need that the groove after processing is grouped.Opening width of the groove group to after is to welding
The comfort level of process has a major impact.The size and tube wall thickness of bevel angle determine the opening width of welding groove.
In this example, it is 12mm~15mm that opening width of the welding groove group to after, which can be arranged, it is preferred that can be arranged to 14mm.
For example, when carrying out root bead to welding ends using argon tungsten-arc welding, tungsten electrode can be facilitated to stretch into and complete root bead inside groove, also side
Just it uses the argon arc welding porcelain mouth of 6# to 8# to be positioned over bevelled edge and carries out crank swing welding.
Before implementing to weld, need to carry out protection against oxidation processing to welding ends.Main includes being carried out to the front of weld seam
Gas shield and gas shield is carried out to the back side of weld seam.
More than, carrying out gas shield to the back side of weld seam can be in the Internal architecture air dam of mechanical composite tube.Construct air dam
Material used in both ends can be the material easily excluded, for example, the round rubber skin to match with mechanical composite tube internal diameter, or
Person can be the material that can build confining gas room made with starch or other carbohydrate.Construct the both ends of air dam
The distance of material can be 200mm~300mm, it is preferred that can be 230mm~270mm, it is furthermore preferred that can be 250mm.
Back-protective is carried out to weld seam and may be coextruded argon filling in pipe pipe, effect is that internal activity replacement of oxygen is become inertia
Gas avoids oxygen from being reacted with high temperature weld metal and aoxidizes, influences weld properties and corrosion resistance.Argon filling is completed
After oxygen determination instrument may be used oxygen content is measured, residual oxygen content is not higher than 300ppm.
As shown in figure 3, it is rubber skin, the both ends Interal fixation of rubber skin that the material at structure air dam both ends, which can be centre,
The material that can form closed gas compartment.In a centrally disposed pipeline that can be passed through protective gas for rubber skin,
The pipe surface being placed in air dam is provided with multiple stomatas for capableing of release guard gas.
Positive gas shield when being welded for mechanical composite tube can use argon gas.For example, working as using argon arc welding to machine
When tool multiple tube is welded, the pure argon that may be used 99.99% is protected.When mechanical composite tube root bead welds, weld seam
The back side must be protected to prevent sealing run from being aoxidized.The pure argon that equally may be used 99.99% carries out gas shield.
Certainly the protected mode of the present invention is without being limited thereto, it is, for example, possible to use flux shielding.Flux shielding is mainly carried out using flux-cored wire
Welding, melts the skull to be formed by the drug core component in welding wire and is protected.Flux shielding mainly gas shielding condition compared with
Hardly possible uses under conditions of realizing.
Step S04, welds welding ends.
After carrying out front, backside gas protection to weld seam, then mechanical composite tube welding ends progress root bead, transition are welded,
Filling weldering and cosmetic welding.For the mechanical composite tube of the present invention, the welding between liner layer and base, more effectively to prevent
The problems such as dilution and carbon diffusion, the graded seal between liner layer and base strictly should control penetration ratio.In this example, interior
The base metals penetration ratio of graded seal can be controlled 20%~30% between lining and base.Preferably, it can control
22%~28%.For example, penetration ratio can be 26%.
In this example, the backing welding of liner layer and transition zone (refer to corrosion-resistant alloy layer and external carbon steel inside multiple tube
Interface between base) welding the smaller hand tungsten argon arc welding of heat input may be used.It can be with for the welding of base
Using the method for welding electrode arc welding.In order to have better welding efficiency, root bead, transition weldering, filling weldering and the lid of mechanical composite tube
Face weldering may be used heating wire TIG and be welded.
In this example, to ensure the corrosion resistance of liner layer material, liner layer material is avoided to exist in the welding process
The sensitizing temperature section residence time is long, without carrying out weld preheating.Meanwhile to prevent the generation and heat affecting of HOT CRACK FOR WELDING P
The crystal grain in area is grown up and Carbide Precipitation, should control interlayer temperature, can by interlayer temperature control at 100 DEG C hereinafter, it is preferred that
, interlayer temperature can be controlled at 90 DEG C or less.
In this example, root bead can select the welding material consistent with liner layer.Transition weldering, filling weldering and cosmetic welding
It needs, in view of connecting between liner layer and base, different steel weld material can be selected.For example, liner layer is the stainless of 316L
Steel can then select 316L stainless steel solid welding wires during root bead.It then can be with for transition weldering, filling weldering and cosmetic welding
Such as 309 stainless steel welding sticks, welding rod are selected, is had the advantages that at low cost.
In this example, the welding material select can utilize nickel content for 58%~62% Nickel-based Alloy Welding
Material carries out root bead, transition weldering, filling weldering and cosmetic welding to mechanical composite tube.Using nickel content be 58%~62% it is Ni-based
Alloy welding material has the advantages that corrosion resistance, cracking resistance are more preferable.It is, for example, possible to use nickel content is 58%~62%
ERNiCrMo-3 nickel-base alloy wldings welded.
More than, the welding procedure method of mechanical composite tube of the invention is suitable for the welding of common mechanical multiple tube, especially
Welding suitable for the petroleum gas mechanical composite tube for conveying the acidic corrosive medias such as particle containing chlorine, hydrogen sulfide.
In conclusion the welding procedure method of the mechanical composite tube of the present invention carries out heap to the pipe end of mechanical composite tube first
Weldering, can improve the stress situation of butt weld, can avoid the generation of crackle.The groove for designing the present invention, in conjunction with welding
Technique can improve welding efficiency, and welding procedure is simple for process.
Although above by describing the present invention in conjunction with exemplary embodiment, those skilled in the art should be clear
Chu can carry out exemplary embodiment of the present invention each in the case where not departing from spirit and scope defined by claim
Kind modifications and changes.
Claims (10)
1. a kind of welding procedure method of oil and gas transmission mechanical composite tube, which is characterized in that the mechanical composite tube
It is made of liner layer and base, the welding procedure method includes the following steps：
Built-up welding is carried out to mechanical composite tube welding ends；
The welding ends of mechanical composite tube is processed into the U-shaped groove of gapless group pair, the root extended length of the groove is
0.8mm~1.2mm, the width of root face are 2.5mm~3.0mm；
Groove group pair is completed, anti-oxidation processing is carried out to welding ends；
The base metals penetration ratio for controlling graded seal between liner layer and base is 20%~30%, control welding material at
Point, complete the root bead to composite bimetal pipe welding ends, transition is welded, filling is welded and cosmetic welding.
2. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
The liner layer of the mechanical composite tube is stainless steel or nickel-base alloy, and base is mild steel or low-alloy pipe line steel.
3. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
The bevel angle of the groove is 19 °~29 °, and groove chamfering is 3.0mm~3.4mm.
4. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
It is described that carry out anti-oxidation processing to welding ends include carrying out gas shield and to the back side of weld seam into promoting the circulation of qi to the front of weld seam
Body is protected, and the back side to weld seam is included in the Internal architecture air dam of mechanical composite tube into gas shield.
5. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 4, which is characterized in that
Described to construct material used in the both ends of air dam be the material for being easy to discharge line, and the distance of the both ends material is 200mm
~300mm.
6. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
Opening width of the groove group to after is 12mm~15mm.
7. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
The Nickel-based Alloy Welding material that the welding of the mechanical composite tube is 58%~62% including the use of nickel content is to mechanical composite tube
Carry out root bead, transition weldering, filling weldering and cosmetic welding.
8. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
The root bead to composite bimetal pipe welding ends, transition weldering, filling weldering and the cosmetic welding completed includes using handwork tungsten electrode argon arc
Weldering carries out root bead to liner layer and base and transition is welded, and is welded to base using welding electrode arc welding.
9. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, which is characterized in that
The root bead to composite bimetal pipe welding ends, transition weldering, filling weldering and the cosmetic welding completed includes being welded using heating wire TIG
It connects.
10. the welding procedure method of oil and gas transmission mechanical composite tube according to claim 1, feature exist
In, it is described to carry out weld preheating when being welded to mechanical composite tube, interlayer temperature control when welding 100 ° with
Under.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109834365A (en) * | 2019-03-08 | 2019-06-04 | 中国石油天然气集团有限公司 | A kind of processing method for small-bore internal coat pipeline butt welding |
| CN110253108A (en) * | 2019-07-12 | 2019-09-20 | 中船桂江造船有限公司 | A kind of welding method of level-B steel+316L dissimilar steel |
| CN112439981A (en) * | 2019-09-02 | 2021-03-05 | 中国石油化工股份有限公司 | Butt joint method of corrosion-resistant alloy prefabricated inner repaired mouth steel pipe |
| CN114734119A (en) * | 2022-04-01 | 2022-07-12 | 无锡金亿联圣机械科技有限公司 | Welding groove and welding method of petroleum pipeline |
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Application publication date: 20181002 |