CN107398688B - A kind of multiple tube instrument mouth aperture and welding method - Google Patents
A kind of multiple tube instrument mouth aperture and welding method Download PDFInfo
- Publication number
- CN107398688B CN107398688B CN201710833121.8A CN201710833121A CN107398688B CN 107398688 B CN107398688 B CN 107398688B CN 201710833121 A CN201710833121 A CN 201710833121A CN 107398688 B CN107398688 B CN 107398688B
- Authority
- CN
- China
- Prior art keywords
- welding
- multiple tube
- coating
- welding method
- weld groove
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
-
- 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
Abstract
The invention discloses a kind of multiple tube instrument mouth aperture and welding methods, comprising the following steps: A1. selects carbon steel pipe or low alloy steel as base, composite bimetal pipe of the corrosion resisting alloy pipe as coating；A2. in compound pipe surface reactor startup weld groove, heap weld groove forms blind hole through base and in coating, and fills up heap weld groove again by built-up welding and form welding layer；A3. secondary aperture is carried out to gained heap weld groove in A2 step, institute's aperture runs through welding layer and coating blind hole；A4. opened hole site insertion and weldolet in A3 step.Integrality of the anticorrosion layer of corrosion resistant alloy pipeline at branch pipe can be guaranteed, while effectively solving the problems, such as complex process by changing processing technology using the present invention.
Description
Technical field
The present invention relates to pipeline manufacturing technology fields, more particularly to a kind of multiple tube instrument mouth aperture and welding method.
Background technique
In the prior art, with home and abroad petroleum gas project development, most of oil field, gas field project are found
The ambient condition the next complicated, and " high yield, high temperature, high pressure, Gao Han H is presented in the Large gas field project especially developed in recent years2S、
Height contains CO2, high chloride ion-containing " feature, the corrosivity of medium is stronger, and operation risk is higher.To improve Engineering Reliability and Quan Shou
Period economy is ordered, such gas field development project uses composite bimetal pipe as Project for Corrosion Protection substantially, it is therefore desirable to each
Aspect carries out technological break-through and perfect.
Aperture especially is carried out to pipeline and is inserted into instrument, since corrosion resistant alloy bimetal compound pipeline relies on the anti-corrosion conjunction of 3mm
Layer gold is anticorrosive, but progress aperture destroys the integrality of the anticorrosion layer of pipeline on the pipeline, reduces pipeline corrosion resistance；
It first can be responsible for (base tube) aperture, then branch pipe welded directly to the run pipe in carbon steel in factory at present, be finally responsible for using Full-automatic welding equipment
Inner surface carries out anticorrosion layer built-up welding, but the high automatic Pipeline inner wall overlaying equipment of the necessary purchase cost of the technique, and technique
It is complicated.
Summary of the invention
The invention mainly solves the technical problem of providing a kind of multiple tube instrument mouth aperture and welding methods, pass through change
Processing technology guarantees integrality of the anticorrosion layer of corrosion resistant alloy pipeline at branch pipe, while effectively solving the problems, such as complex process.
To solve above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
A kind of multiple tube instrument mouth aperture and welding method, which comprises the following steps:
A1. select carbon steel pipe or low alloy steel as base, corrosion resisting alloy pipe is compound as the bimetallic of coating
Pipe；
A2. in compound pipe surface reactor startup weld groove, heap weld groove forms blind hole through base and in coating, and again by built-up welding
It fills up heap weld groove and forms welding layer；
A3. secondary aperture is carried out to gained welding layer in A2 step, institute's aperture runs through welding layer and coating blind hole；
A4. opened hole site insertion and weldolet in A3 step.
Further, the corrosion resisting alloy in the A1 step is nickel-base alloy.
Further, gained heap weld groove in the A2 step, need to remove whole parent metals in heap weld groove, and coating remains
Remaining thickness is not less than 1mm.
Further, the heap in the A2 step is welded in pipeline wall thickness in 20mm or more using automatic surfacing, pipeline
Wall thickness uses hand tungsten argon arc welding within 20mm, and adds ERNiCrMo-3 nickel-based welding wire and carry out built-up welding, and in welding,
Carry out low_input_power and interlayer temperature control.
Further, the low_input_power is to reduce the heat of unit length weld seam as far as possible under the premise of ensuring fusion character
Input, heat input not more than 10KJ/cm.
Further, after the completion of the interlayer temperature control is preceding layer welding bead, workpiece table is carried out before next layer of welding
Face is cooling, controls interlayer temperature.
Further, ultrasonic examination is carried out after the completion of the welding detect whether that there are crackles, incomplete fusion defect.
Further, nickel-base alloy hole wall is formed between secondary institute aperture and base and coating in the A3 step.
Further, the nickel-base alloy hole wall is 3mm or more thickness.
Further, Liquid penetrant testing is carried out after the completion of the Saddle welding.
The beneficial effects of the present invention are: being in contrast to the prior art, the present invention carries out instrument using secondary aperture method
The welding of Saddle is installed, so that forming nickel-base alloy hole wall between the installation through-hole and base of Saddle, is effectively ensured anti-corrosion
Integrality of the anticorrosion layer (coating) of alloy pipeline at branch pipe, it is ensured that whole pipeline performance safety；Solve live aperture, weldering
Connecing the problem that quality is difficult to ensure, it is ensured that corrosion resistant alloy pipeline is widely applied utilization in petroleum gas projects, and
And can be effectively reduced cost, it increases economic efficiency.
Specific embodiment
Specific embodiment is described further the present invention below.
A kind of multiple tube instrument mouth aperture and welding method, comprising the following steps:
A1. select carbon steel pipe or low alloy steel as base, corrosion resisting alloy pipe is compound as the bimetallic of coating
Pipe；Corrosion resisting alloy is nickel-base alloy.
A2. in compound pipe surface reactor startup weld groove, heap weld groove forms blind hole through base and in coating, and again by built-up welding
It fills up heap weld groove and forms welding layer；Gained heap weld groove need to remove whole parent metals in heap weld groove, the residual thickness of coating
Not less than 1mm.In built-up welding, if pipeline wall thickness in 20mm or more, using automatic surfacing；If pipeline wall thickness 20mm with
It is interior, then hand tungsten argon arc welding is used, and add ERNiCrMo-3 nickel-based welding wire and carry out built-up welding, and in welding, carry out low-heat
Input and interlayer temperature control.The low_input_power is to reduce unit length weld seam as far as possible under the premise of ensuring fusion character
Heat input, heat input not more than 10KJ/cm.The interlayer temperature control is next layer of welding after the completion of preceding layer welding bead
Workpiece surface temperature control is carried out before.And ultrasonic examination is carried out after the completion of built-up welding welding and is detected whether there are crackle, not
Fuse defect.
A3. secondary aperture is carried out to gained welding layer in A2 step, institute's aperture runs through welding layer and coating blind hole；Secondary institute
Nickel-base alloy hole wall is formed between aperture and base and coating, nickel-base alloy hole wall is 3mm or more thickness.Opened hole site
It is inserted into and weldolet, the Saddle welding carries out Liquid penetrant testing after the completion.
In actual processing, it is used as and is covered using the resisto pipe of the N08825 and the above trade mark that carried out solution strengthening
Layer, base are carbon steel pipe or low alloy steel, and wherein base provides intensity and guarantees, cladding guarantees pipeline corrosion resistance；Base
It processes to form metallurgical composite pipe using modes such as hot rolling, explosion weldering, built-up welding with cladding.
Compound tube field aperture welding most critical is to ensure that supervisor and Saddle junction fillet weld seam quality, forbids to lead
The corrosive medium conveyed in pipe base carbon steel or the direct contacting pipe of low-alloy steel, i.e., it is so-called " dew iron ".An aperture (i.e.
Reactor startup weld groove) after, base formed through-hole, coating formed blind hole, at this point, coating institute's open-blind hole apart from multiple tube medium channel at least
1mm thickness prevents the burn-through in later period built-up welding.Then built-up welding is carried out, and using ERNiCrMo-3 nickel-based welding wire to once being opened
Hole (i.e. reactor startup weld groove) is filled, so that filling up nickel-base alloy metal in heap weld groove again.
, need to be under the premise of ensuring fusion character in welding, reduction heat input as far as possible, according to heat input Q=NLU/u formula,
The wherein heat input (J/cm) of Q-- unit length weld seam；I-- welding current (A)；U-- arc voltage (V)；U-- speed of welding
(cm/s)；N-- coefficient of thermal efficiency；Heat input is lower, and the oxidation of the elements such as corrosion resistant alloy element Ni, Cr, Mo and scaling loss reduce, and resists
Corrosive nature is better, the heat input of unit length weld seam not more than 10KJ/cm.And the strict control interlayer temperature in welding
It spends, after the completion of preceding layer welding bead, controls workpiece surface temperature before next layer of welding.And interlayer temperature is lower, the cooling of postwelding workpiece
It is faster, advantageously ensure that deposited metal corrosion resistance
After the completion of primary institute's aperture (i.e. reactor startup weld groove) built-up welding filling, secondary aperture is carried out in obturator, is opened secondary
The hole wall in hole is nickel-base alloy metal remaining in heap weld groove, that is, between secondary institute aperture and base and coating.Two
The pore wall thickness in secondary opened hole is that the nickel base alloy layer of 3-5mm without considering the cost, is also possible to more certainly
Thick nickel base alloy layer.Hole wall can effectively prevent the base's carbon steel or low-alloy steel of being responsible for internal corrosion medium and position of opening
Contact, it is ensured that whole pipeline resistance to corrosion.To guarantee hole wall nickel base alloy layer quality, after being polished, then infiltration spy is carried out
Hurt (PT), it is ensured that hole wall zero defect.
In aperture twice, due to needing the aperture on Ni-based multiple tube, coating nickel-base alloy is that viscosity is big, with high hardness
Material, it is necessary to which selecting has variable speed, torque protection, and the devices such as double exhausted source protections: when motor is loaded, torsion can greatly may be used
It is small；When boring material is hard, viscosity is big material, torsion is transferred to maximum, revolving speed is transferred to that minimum (revolving speed is lower, and torsion is bigger, revolving speed
Higher, torsion is smaller), overload protection arrangement ensures motor autostop, and motor is effectively protected, and avoids burning out motor.
And it is the instrument ozzle welding quality for guaranteeing scene opening, and it is all made of Saddle mode, since Saddle size is small,
And must assure that welding quality, using full hand tungsten argon arc welding (GTAW) welding, guarantee root through welding；To guarantee root weldering
Thoroughly, Saddle and supervisor outer surface need to keep the gap of 1.0~2.0mm.
The present invention carries out the welding of instrument installation Saddle using secondary aperture method, so that the installation through-hole and base of Saddle
Nickel-base alloy hole wall is formed between layer, integrality of the anticorrosion layer (coating) of corrosion resistant alloy pipeline at branch pipe is effectively ensured, really
Protect whole pipeline performance safety；Solve the problems, such as that live aperture, welding quality are difficult to ensure, it is ensured that corrosion resistant alloy pipeline is in stone
It is widely applied utilization in oily Natural Gas Projects engineering, and can be effectively reduced cost, is increased economic efficiency.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize invention
Equivalent structure or equivalent flow shift made by description, is applied directly or indirectly in other relevant technical fields,
It is included within the scope of the present invention.
Claims (10)
1. a kind of multiple tube instrument mouth aperture and welding method, which comprises the following steps:
A1. select carbon steel pipe or low alloy steel as base, composite bimetal pipe of the corrosion resisting alloy pipe as coating；
A2. in compound pipe surface reactor startup weld groove, heap weld groove forms blind hole through base and in coating, and is filled up again by built-up welding
Heap weld groove simultaneously forms welding layer；
A3. secondary aperture is carried out to gained welding layer in A2 step, institute's aperture runs through welding layer and coating blind hole；
A4. opened hole site insertion and weldolet in A3 step.
2. multiple tube instrument mouth aperture according to claim 1 and welding method, which is characterized in that in the A1 step
Corrosion resisting alloy is nickel-base alloy.
3. multiple tube instrument mouth aperture according to claim 1 and welding method, which is characterized in that institute in the A2 step
Heap weld groove is obtained, whole parent metals in heap weld groove need to be removed, the residual thickness of coating is not less than 1mm.
4. according to claim 1 or 3 any the multiple tube instrument mouth apertures and welding method, which is characterized in that the A2
Heap in step is welded in pipeline wall thickness in 20mm or more using automatic surfacing, and pipeline wall thickness uses tungsten electrode argon within 20mm
Arc-welding, and add ERNiCrMo-3 nickel-based welding wire and carry out built-up welding, and in welding, carry out low_input_power and interlayer temperature control.
5. multiple tube instrument mouth aperture according to claim 4 and welding method, which is characterized in that the low_input_power is
Under the premise of ensuring fusion character, the heat input of unit length weld seam is reduced, heat input is no more than 10KJ/cm.
6. multiple tube instrument mouth aperture according to claim 4 and welding method, which is characterized in that the interlayer temperature control
It is made as after the completion of preceding layer welding bead, workpiece surface cooling is carried out before next layer of welding, interlayer temperature is controlled.
7. multiple tube instrument mouth aperture according to claim 4 and welding method, which is characterized in that after the completion of the welding
It carries out ultrasonic examination and detects whether that there are crackles, incomplete fusion defect.
8. multiple tube instrument mouth aperture according to claim 1 and welding method, which is characterized in that two in the A3 step
Nickel-base alloy hole wall is formed between secondary institute aperture and base and coating.
9. multiple tube instrument mouth aperture according to claim 8 and welding method, which is characterized in that the nickel-base alloy hole
Wall is 3mm or more thickness.
10. multiple tube instrument mouth aperture according to claim 1 and welding method, which is characterized in that the Saddle weldering
Liquid penetrant testing is carried out after the completion of connecing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710833121.8A CN107398688B (en) | 2017-09-15 | 2017-09-15 | A kind of multiple tube instrument mouth aperture and welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710833121.8A CN107398688B (en) | 2017-09-15 | 2017-09-15 | A kind of multiple tube instrument mouth aperture and welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107398688A CN107398688A (en) | 2017-11-28 |
| CN107398688B true CN107398688B (en) | 2019-03-26 |
Family
ID=60388684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710833121.8A Active CN107398688B (en) | 2017-09-15 | 2017-09-15 | A kind of multiple tube instrument mouth aperture and welding method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107398688B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112475537A (en) * | 2020-11-11 | 2021-03-12 | 国家能源集团谏壁发电厂 | On-site repair method for T23 water wall based on surfacing technology |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6380972A (en) * | 1986-09-22 | 1988-04-11 | Babcock Hitachi Kk | Piping joining method for pressure container |
| JPH0929429A (en) * | 1995-07-21 | 1997-02-04 | Toshiba Corp | Welding procedure |
| CN101585114A (en) * | 2009-01-14 | 2009-11-25 | 中国华电工程(集团)有限公司 | Welding method and structure of tube seat |
| CN201745974U (en) * | 2009-07-07 | 2011-02-16 | 上海贤达罗兰压力容器制造有限公司 | Protective and leak detecting structure of weld joint of container taking active metal and steel composite board as liner |
| CN102267013A (en) * | 2010-06-04 | 2011-12-07 | 中国石油大学(华东) | Connecting method for gas mixture connecting tube and sealing head of hydrogenation reactor |
| CN102513713A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Welding method for stainless steel composite board pressure vessel shell and insert-type stainless steel connecting pipe |
| 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 |
-
2017
- 2017-09-15 CN CN201710833121.8A patent/CN107398688B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6380972A (en) * | 1986-09-22 | 1988-04-11 | Babcock Hitachi Kk | Piping joining method for pressure container |
| JPH0929429A (en) * | 1995-07-21 | 1997-02-04 | Toshiba Corp | Welding procedure |
| CN101585114A (en) * | 2009-01-14 | 2009-11-25 | 中国华电工程(集团)有限公司 | Welding method and structure of tube seat |
| CN201745974U (en) * | 2009-07-07 | 2011-02-16 | 上海贤达罗兰压力容器制造有限公司 | Protective and leak detecting structure of weld joint of container taking active metal and steel composite board as liner |
| CN102267013A (en) * | 2010-06-04 | 2011-12-07 | 中国石油大学(华东) | Connecting method for gas mixture connecting tube and sealing head of hydrogenation reactor |
| CN102513713A (en) * | 2011-12-14 | 2012-06-27 | 张家港圣汇气体化工装备有限公司 | Welding method for stainless steel composite board pressure vessel shell and insert-type stainless steel connecting pipe |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107398688A (en) | 2017-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101972878A (en) | Process for welding duplex stainless steel | |
| Kahar | Duplex stainless steels-an overview | |
| CN103286414A (en) | Welding method of oil gas transmission antisulphour steel pipelines | |
| Alvaraes et al. | Microstructural characterization of Inconel 625 nickel-based alloy weld cladding obtained by electroslag welding process | |
| Frei et al. | Low heat input gas metal arc welding for dissimilar metal weld overlays part III: hydrogen-assisted cracking susceptibility | |
| Pantelis et al. | Corrosion of weldments | |
| CN114505656B (en) | Manufacturing process of plunger pump housing, plunger pump housing and plunger pump | |
| CN107398688B (en) | A kind of multiple tube instrument mouth aperture and welding method | |
| JP2018001275A (en) | Welding waveform for stainless steel applications | |
| CN102278542A (en) | Metallurgy compound pipeline and manufacturing method thereof | |
| Yue et al. | Welding technology development for an erosion-resistant slurry pipeline steel | |
| CN102909484A (en) | Cobalt-based surfacing welding wire | |
| CN108581139A (en) | A kind of welding method of oil and gas transmission bimetal compound pipeline | |
| WO2006069414A1 (en) | Pipeline welding | |
| CN105983766A (en) | Low-carbon steel and alloy steel welding method | |
| CN107971606A (en) | A kind of pre- jointing method of steel pipe weld bond | |
| CN106964909A (en) | Pre- repaired mouth cermet（DSHS）Inside cover the manufacture method of steel pipe | |
| CN108581140A (en) | Gunmetal welding procedure | |
| US6307178B1 (en) | Method for welding shaped bodies made of carburized heat-resistant steel | |
| CN105855663A (en) | New method for surfacing coating composite welding | |
| CN108453403A (en) | The welding method of Pressure container manhole flange anticorrosion sieve plate | |
| CN202152872U (en) | Anti-corrosion valve structure | |
| JP2013108918A (en) | Nozzle welded part corrosion prevention and repair method | |
| Gonçalves e Silva et al. | Double-Sided welding as an alternative for joining internally clad pipes | |
| Lu et al. | Effect of iron content on localised corrosion resistance of Ni-Cr-Mo alloy weld overlays in chloride ion-containing environments |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |