CN113579426B - Welding method for stainless steel pipeline lined in butt joint section - Google Patents
Welding method for stainless steel pipeline lined in butt joint section Download PDFInfo
- Publication number
- CN113579426B CN113579426B CN202110676475.2A CN202110676475A CN113579426B CN 113579426 B CN113579426 B CN 113579426B CN 202110676475 A CN202110676475 A CN 202110676475A CN 113579426 B CN113579426 B CN 113579426B
- Authority
- CN
- China
- Prior art keywords
- welding
- layer
- stainless steel
- pipeline
- composite
- 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
Images
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
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
-
- 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
- B23K9/00—Arc welding or cutting
- B23K9/32—Accessories
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Arc Welding In General (AREA)
Abstract
A method for welding a stainless steel pipeline with a lining at a butt joint section comprises the steps of coating an anti-corrosion coating on the inner wall and the outer wall of the pipeline; the inner wall of the pipe orifice of the pipeline is attached with a stainless steel belt layer. In the butt welding process of two adjacent pipelines, groove design, groove processing and pairing design in a preparation stage before butt welding are carried out; selecting welding materials and setting welding process parameters in the welding method stage; the composite pipeline with the stainless steel strip lining in the joint section can be assembled and welded efficiently and with high quality by the technical means of a bottom layer sealing and welding method, a transition layer welding method, interlayer temperature control and the like in the welding operation stage.
Description
Technical Field
The invention belongs to the technical field of welding, and particularly relates to a method for welding a stainless steel pipeline lined in a butt joint section.
Background
In engineering construction, in order to solve the problem of internal corrosion of a buried pipeline in the using process, the inner wall and the outer wall of a steel pipe are made of 3PE anticorrosive materials to form anticorrosive coatings. And the pipe orifice butt joint section is attached by adopting a stainless steel strip lining in an extrusion mode so as to facilitate the connection of the pipe orifices in a welding mode. The stainless steel band is firstly pasted at the position of the pipe orifice, and then the anti-corrosion coating is manufactured. Because the pipe wall structure of the welding position is complex, the welding quality cannot be ensured by adopting the existing welding method.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for welding a stainless steel pipeline lined in a butt joint section. The method specifically comprises the following steps:
a method for welding a stainless steel pipeline lined with a butt joint section comprises the steps that an inner wall and an outer wall of the pipeline are provided with anti-corrosion coatings; the inner wall of the pipe orifice position of the pipeline is attached with a stainless steel belt layer, and the definition is as follows: the side wall of the pipeline is a base layer, the stainless steel belt layer is a composite layer, and a composite gap is formed between the composite layer and the base layer. The step of butt welding two adjacent pipelines comprises the following steps:
1. preparation before welding
1.1 groove design, processing and pairing:
(1) Groove design
Designing a groove at the position of a pipeline port, wherein the groove is a V-shaped groove with a truncated edge, and the groove angle is as follows: alpha is more than 50 degrees and less than 70 degrees, and the bevel face: 5-10 degrees, group to gap: b is less than or equal to 3mm, and truncated edge: c is more than or equal to 2mm and less than or equal to 4mm;
(2) Groove processing and assembling:
a. after the grooves are machined, polishing the inner part of the double-layer side to clean stains before assembly, simultaneously protecting finished products, and sealing the pipe orifices to be welded;
integrally polishing the inner and outer surfaces near the groove to remove impurities before formal welding; the compound layer is not damaged during polishing;
b. when the composite layers are combined, the composite layers of the two pipelines are aligned by taking the composite layers as a reference, and the misalignment amount is controlled to be not more than 2mm; when the multiple layers are not equal in thickness, the misalignment amount is taken according to the small-thickness multiple layers;
before the multilayer assembly: protective gas is filled into the tube in advance to replace the air in the tube; or the flux-cored welding wire with the coating is adopted to weld the multiple layers, so that the metal welding seam on the back is prevented from being oxidized and the alloy elements are prevented from being burnt;
1.2 enacting a welding method
The welding process comprises the following steps: welding a bottoming layer, namely a welding multiple layer, namely a welding compound layer, a plugging compound gap, a welding transition layer, and a filling and covering layer;
the composite gap is blocked by adopting a manual argon tungsten-arc welding method;
the welding transition layer is welded by adopting shielded metal arc welding; the transition layer corresponds to the truncated edge of the groove;
before filling and cover surface welding, cleaning the welding seam surface and the edge of the groove of the transition layer, and filling the welding seam between the two grooves and the cover surface of the welding seam surface; welding rod arc welding is adopted for filling and cover surface welding;
1.3 selection of welding materials
1.3.1 selection of welding wires for welding multiple layers and plugging composite gaps: the welding wire is matched with the chemical components of the stainless steel strip;
1.3.2 welding the material of the transition layer and selecting: selecting a welding material with the content of the chromium-nickel alloy higher than that of the base material;
1.3.3 selection of welding rods for welding base layers: welding a base layer by adopting shielded metal arc welding;
1.4, setting welding process parameters;
2. welding operation
2.1 sealing and welding of priming layer and composite gap
After the bottoming layer is welded, the welding of the composite gap is controlled according to welding process parameters, the current and the welding method are controlled, and the composite gap is sealed after the base layer and the composite layer are hot-melted;
the welding current is in the interval of 90-110A;
after welding a section of welding seam, paying attention to the change of the color of the welding seam, judging whether air exists in the welding seam, and timely checking whether a leakage point occurs in the filling of the protective gas; wind speed is also required to be noticed during welding, and wind prevention measures are taken when necessary;
2.2 transition layer welding
The transition layer strictly controls welding current according to welding process parameters;
2.3 control of interlayer temperature
The interlayer temperature should be controlled below 150 ℃.
By adopting the welding method, the composite pipeline with the stainless steel band lining the joint section can be assembled and welded with high efficiency and high quality.
Drawings
FIG. 1 is a view showing a portion to which a steel strip is bonded.
Fig. 2 is a schematic diagram of groove structure.
In the figure: a base layer 1, a composite layer 2 and a composite gap 3.
Detailed Description
In this embodiment, 20 is introduced for the construction of underground water supply and drainage pipeline of ethylene project integrated with building project smoke platform polyurethane industry chain-building project # A method for welding a stainless steel band (316L stainless steel) lined composite pipeline at a butt joint section of a steel pipe.
1. Overview of the project
The integrated ethylene project of the smoke platform Wanhua polyurethane industrial chain selects 20 buried pipelines for water supply and drainage # The steel pipe, in order to guarantee buried pipeline corrosion problems in the use, the pipeline inside and outside wall adopts 3PE corrosion protection material to carry on anticorrosive, adopts the wide stainless steel area of 150mm (316L stainless steel) inside lining in the mouth of pipe butt joint section with the laminating of extruded mode to be convenient for the mouth of pipe connects with welding mode.
For the unpressurized perishable pipeline, compared with a full stainless steel pipe, a composite steel pipe or a corrosion-resistant material steel pipeline, the design can greatly reduce the cost.
The length of the butt-jointed section is 3160 m in total and 276 weld joints are formed in the butt-jointed section. Table 1.1 basic parameters of the pipe, fig. 1 is a diagram showing the attachment portion of the stainless steel band.
TABLE 1.1 composite pipe basic parameters
2. Preparation before welding
2.1 groove design, processing and pairing
(1) Groove design
As the maximum nominal diameter of the buried pipeline is DN600, the groove is suitable to be processed into a V-shaped groove with a truncated edge, the bevel angle is more than 50 degrees and less than alpha and less than 70 degrees, the bevel face is 5 to 10 degrees, the pairing gap b is less than or equal to 3mm, and the truncated edge 2 is less than or equal to c and less than or equal to 4mm.
(2) Groove processing and assembling
a. The groove is processed by a special groove machine, an angular grinding machine (a stainless steel special grinding wheel) is used for internally grinding and cleaning stains on the multiple layer side before assembly, finished product protection is timely made, and the closed pipe orifice is to be welded. Before formal welding, the inner and outer surfaces near the groove are integrally polished to remove impurities such as rust, stain and moisture, and a composite layer is not damaged during derusting and cleaning. The cleaning is performed within the range of 20mm on both sides of the groove.
When the groove is manufactured, the base layer and the composite layer are ground to remove part of the anti-corrosion layer, so that the welding treatment is convenient.
b. When the composite layer is assembled, the composite layer is aligned as much as possible, the misalignment amount is controlled to ensure the welding quality of the transition layer and the composite layer, and the misalignment amount is not more than 2mm, when the composite layer is not thick, the misalignment amount is taken according to the thickness of a smaller composite layer, argon gas (the purity of the argon gas is not lower than 99.99 percent and the water content is not greater than 50 mg/3) is filled into the tube in advance before the composite layer is assembled, so that the air in the tube is replaced, or a flux-cored welding wire with a coating is used for welding the composite layer, so that the metal welding seam on the back surface is prevented from being oxidized, alloy elements are burnt, welding defects are easily generated, and the mechanical property and the corrosion resistance of the metal of the welding seam are reduced.
2.2 formulating a welding method
The basic sequence of welding the stainless steel lined composite pipeline at the butt joint section is to weld the composite layer first and then weld the base layer; however, the butt-jointed steel strip is joined to the base layer 20 # The steel pipe is formed by extrusion, so that the attaching degree is not tight enough, and a certain gap exists between the compound layer and the base layer, so that the gap of the compound part is blocked after the compound layer is welded. The actual welding process is as follows: backing welding (multilayer welding), gap plugging, a transition layer, a filling and covering layer, so that the welding of the gap plugging is the most critical step in the whole welding process, and a manual argon tungsten-arc welding method is adopted.
For the welding of the transition layer, because the deposited metal components are complex, in order to enable the welding process to be transited smoothly, the welding is carried out by adopting shielded metal arc welding.
The welding seam surface and the bevel edge of the transition layer must be cleaned before filling and cover surface welding, and the base layer is made of 20 materials # The welding process is very mature, so that shielded metal arc welding is still adopted for welding a base layer.
2.3 selection of welding materials
2.3.1 selection of priming coat and gap-plugging welding wire
For the priming coat, according to the principle that welding materials are selected for stainless steel welding: the welding wire is matched with the chemical components of the base material and adopts ER316L (H00 Cr19Ni12Mo 2) stainless steel welding wire with the diameter of
The deposited metal chemical composition is shown in table 2.1.
TABLE 2.1 ER316L deposited metal chemical composition TABLE
| C | Si | Mn | P | S | Ni | Cr | Mo | Cu |
| ≤0.03 | 0.3-0.65 | 1.0-2.5 | ≤0.03 | ≤0.03 | 11.0-14.0 | 18.0-20.0 | 2.0-3.0 | ≤0.75 |
| 0.019 | 0.52 | 1.80 | 0.017 | 0.013 | 11.62 | 18.64 | 2.11 | 0.07 |
2.3.2 selection of transition layer electrode
Because the deposited metal of the transition layer has the problem that the alloy is diluted, in order to ensure the proportion of the chromium-nickel alloy of the transition layer, a welding material with the content of the chromium-nickel alloy higher than that of the parent metal, namely an E316-16 (A022) stainless steel welding rod is selected, in order to ensure that the bottom layer is not burnt through, the bottom layer is selected
The welding rod is used for welding the transition layer, and the chemical composition of E316-16 deposited metal is shown in a table 2.2.
TABLE 2.2 E316-16 deposited metals chemical composition Table
| C | Si | Mn | Cu | Ni | Cr | Mo | S | P |
| ≤0.04 | ≤0.90 | 0.5-2.5 | ≤0.75 | 11.0-14.0 | 17.0-20.0 | 2.0-3.0 | ≤0.03 | ≤0.035 |
| 0.032 | 0.35 | 1.21 | 0.17 | 1.92 | 18.52 | 2.55 | 0.014 | 0.028 |
2.3.3 selection of base welding rod
The base layer is made of 20 parts # The welding process is relatively mature, so that shielded metal arc welding is still adopted for welding a base layer. In order to ensure the welding quality and the appearance and the attractive appearance, an E4315 (J427) carbon steel welding rod with the diameter of
The chemical composition of E4315 deposited metal is shown in Table 2.3.
TABLE 2.3 E4315 chemical composition table of deposited metal
| C | Si | Mn | V | Ni | Cr | Mo | S | P |
| ≤0.20 | ≤1.00 | 0.5-2.5 | ≤0.08 | ≤0.30 | ≤0.20 | ≤0.3 | ≤0.035 | ≤0.04 |
| 0.107 | 0.70 | 0.447 | 0.008 | 0.020 | 0.028 | 0.003 | 0.004 | 0.015 |
2.4 welding parameters
The welding process parameters are shown in table 2.4.
TABLE 2.4 welding Process parameters
3. Welding technique
3.1 priming coat and gap plugging welding
The bottoming layer and the gap plugging welding are important processes required by the welding quality of the stainless steel lined composite pipeline at the butt joint section, are key to guarantee the welding quality, and need to be finished by adopting argon arc welding. The welder must have a high level of welding technique and responsibility, and if the quality of the primer layer and the gap-sealing weld is not good, the repair is very difficult, and the great economic loss and adverse effect are caused because the stainless steel band and the base layer 20 # The joint of the inner wall of the steel is provided with composite gaps with different thicknesses, and the composite gaps are selected and used as the bottom layer after the bottom layer is welded in the welding processAnd (3) filling welding wires with the same welding material, controlling the current and the welding method in the process, and sealing gaps after the base layer material and the composite layer material are subjected to hot melting.
Welding parameters, namely welding current must be controlled within a range of 90-110A, the root is not completely welded due to the too small current, a welding bead and welding meat are punctured due to the too large current, the current is reasonably controlled to enable the welding wire to be perfectly deposited and clad, gaps are effectively blocked, the clad welding seam can be fully filled, and the welding quality is guaranteed; after welding a section of welding seam, attention is paid to observing the color change of the welding seam, if the welding seam is gray or taimen black, the root is not well protected, air exists in the welding seam, whether a leakage point appears when argon is filled in the welding seam or not is checked, the wind speed is paid attention during welding, and if the air speed exceeds 2m/s, a windproof measure is needed.
3.2 transition layer welding
The transition layer is a very complex part of the deposited metal of the composite pipe, and if the welding parameters are not properly selected, the excessive concentration gradient of the deposited metal alloy is easily caused, so that the corrosion resistance of the joint is influenced.
When a phi 3.2mm welding rod is adopted during welding, the interlayer non-fusion and the concentration gradient of deposited metal alloy are overlarge due to the over-small current, and the root is easily punctured due to the overlarge current. And welding the base layer by using a welding rod.
3.3 control of interlayer temperature
The interlayer temperature is controlled below 150 ℃, and a water cooling method for both sides of the welding line is adopted in the construction, namely, a wet towel which is completely soaked in cold water is wrapped on the steel pipes at both sides which are 80-100mm away from the welding line, so that the welding line is quickly reduced to below 150 ℃.
4. Ending phrase
Practice proves that in the welding process of the stainless steel lined composite pipeline of the butt joint section, the butt joint misalignment amount is strictly controlled by designing a scientific and reasonable welding groove form, the welding method, the welding material and reasonable welding parameters are correctly selected, the strict process control is adopted, the composite layer is tightly attached to the base layer, the welding quality is ensured, and the detection qualified rate is effectively improved. By adopting the welding method, the welding quality in the project completely meets the acceptance requirement.
Claims (4)
1. A method for welding a stainless steel pipeline lined in a butt joint section comprises the following steps of (1) forming an anti-corrosion coating on the inner wall and the outer wall of the pipeline; the inner wall of the pipe orifice position of the pipeline is attached with a stainless steel belt layer, and the definition is as follows: the lateral wall of pipeline is the basic unit, and stainless steel band layer is the multiple layer, is compound gap between multiple layer and the basic unit, and the step that characterized by adjacent two pipeline butt joint welded includes:
one) preparation before welding
1.1 Groove design, machining and pairing:
(1) Bevel design
Designing a groove at the position of a pipeline port, wherein the groove is a V-shaped groove with a truncated edge, and the groove angle is as follows: alpha is more than 50 degrees and less than 70 degrees, and the bevel face: 5-10 degrees, group to gap: b is less than or equal to 3mm, and truncated edge: c is more than or equal to 2mm and less than or equal to 4mm;
(2) Groove processing and pairing:
a. after the groove is processed, polishing the inside of the multilayer side to clean stains before assembly, protecting finished products and sealing the pipe orifices to be welded;
integrally polishing the inner surface and the outer surface near the groove before formal welding to remove impurities; the compound layer is not damaged during polishing;
b. when the composite layers are combined, the composite layers of the two pipelines are aligned by taking the composite layers as a reference, and the misalignment amount is controlled to be not more than 2mm; when the multiple layers are not equal in thickness, the misalignment amount is taken according to the small-thickness multiple layers;
before the multilayer assembly: protective gas is filled into the tube in advance to replace the air in the tube; or the flux-cored welding wire with the coating is adopted to weld the multiple layers, so that the metal welding seam on the back is prevented from being oxidized and the alloy elements are prevented from being burnt;
1.2 Formulation of a welding process
The welding process comprises the following steps: welding a bottoming layer, namely a welding multiple layer, namely a welding compound layer, a plugging compound gap, a welding transition layer, and a filling and covering layer;
the composite gap is blocked by adopting a manual argon tungsten-arc welding method;
the welding transition layer is welded by adopting shielded metal arc welding; the transition layer corresponds to the truncated edge of the groove;
before filling and cover surface welding, cleaning up the welding line surface and the groove edge of the transition layer, and filling the welding line between the two grooves and the cover surface of the welding line surface; welding rod arc welding is adopted for filling and cover surface welding;
1.3 Selection of welding materials
1.3.1 Selection of welding wires for welding multiple layers and sealing composite gaps: the welding wire is matched with the chemical components of the stainless steel strip;
1.3.2 The welding material for welding the transition layer is selected from the following materials: selecting a welding material with the content of the chromium-nickel alloy higher than that of the base material;
1.3.3 Selection of electrodes for welding the base layer: welding the base layer by adopting shielded metal arc welding;
1.4 Formulating welding process parameters;
II) welding operation
2.1 Sealing welding of primer layer and composite gap
After the welding of the priming layer is finished, the welding of the composite gap is controlled according to welding process parameters, the current and the welding method are controlled, and the composite gap is sealed after the base layer and the composite layer are hot-melted;
the welding current is in the interval of 90-110A;
after welding a section of welding seam, paying attention to observing the color change of the welding seam, judging whether air exists in the welding seam, and checking whether a leakage point appears in the filling of the protective gas in time; wind speed is also required to be noticed during welding, and wind prevention measures are taken when necessary;
2.2 ) welding of transition layers
The transition layer strictly controls welding current according to welding process parameters;
2.3 Control of interlayer temperature
The interlayer temperature is controlled below 150 ℃;
the stainless steel belt layer is 316L stainless steel, and the base layer is made of 20 # Steel;
basic parameters of composite pipeline
The welding wire for welding the multiple layers adopts ER316L (H00 Cr19Ni12Mo 2) stainless steel welding wire with the diameter of
The welding material for welding the transition layer adopts an E316-16 (A022) stainless steel welding rod which is selected
Welding rods;
the welding material of the welding base layer adopts an E4315 (J427) carbon steel welding rod with the diameter of
Welding rods;
the welding process parameters are as follows
GTAW: argon tungsten-arc welding, namely argon arc welding; SMAW: and (4) manual arc welding.
2. The method for welding the stainless steel pipe lined in the butt joint section according to claim 1, wherein in the beveling and pairing, the cleaning range is within 20mm of each of both sides of the bevel.
3. The method for welding the stainless steel pipe lined with the butt joint section as claimed in claim 1, wherein the shielding gas is argon, the purity of the argon is not less than 99.99%, and the water content of the argon is not more than 50 mg/ml 3 。
4. The welding method of the butt-jointed lining stainless steel pipeline according to claim 1, wherein the control method of the interlayer temperature comprises the following steps: during construction, a cooling method of water cooling at two sides of a welding line is adopted, namely, a wet towel which is completely soaked in cold water is wrapped on steel pipes at two sides which are 80-100mm away from the welding line, so that the temperature of the welding line is reduced to below 150 ℃ as soon as possible.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110676475.2A CN113579426B (en) | 2021-06-18 | 2021-06-18 | Welding method for stainless steel pipeline lined in butt joint section |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110676475.2A CN113579426B (en) | 2021-06-18 | 2021-06-18 | Welding method for stainless steel pipeline lined in butt joint section |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113579426A CN113579426A (en) | 2021-11-02 |
| CN113579426B true CN113579426B (en) | 2023-02-28 |
Family
ID=78243966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110676475.2A Active CN113579426B (en) | 2021-06-18 | 2021-06-18 | Welding method for stainless steel pipeline lined in butt joint section |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113579426B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114278373A (en) * | 2021-11-26 | 2022-04-05 | 中铁十局集团第三建设有限公司 | Construction method for mounting large-diameter water delivery steel pipe in shield tunnel |
| CN114043046A (en) * | 2021-11-26 | 2022-02-15 | 中石化第四建设有限公司 | Argon-filling-free welding method for preventing back surface from being oxidized by priming argon arc welding at pipeline mounting port |
| CN114985880B (en) * | 2022-06-14 | 2024-04-19 | 沈阳鼓风机集团核电泵业有限公司 | Method for welding austenitic stainless steel piece and carbon steel piece |
| CN115026390B (en) * | 2022-06-24 | 2023-04-28 | 西安石油大学 | Bimetal composite pipe welding method |
| CN115502518A (en) * | 2022-10-10 | 2022-12-23 | 中国化学工程第十四建设有限公司 | Manufacturing and assembly welding process of thin-wall lining welding type plastic-coated steel pipe |
| CN115673699B (en) * | 2022-12-16 | 2023-04-28 | 山东创新精密科技有限公司 | Corrosion prevention treatment method for petroleum pipeline |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07314174A (en) * | 1994-05-20 | 1995-12-05 | Nippon Steel Corp | Pipe making welding method of clad stainless steel pipe |
| CN103331327A (en) * | 2013-05-27 | 2013-10-02 | 中国石油天然气集团公司 | Bimetal composite pipe girth welding method |
| CN111843105A (en) * | 2020-07-28 | 2020-10-30 | 沧州隆泰迪管道科技有限公司 | Automatic backing welding process for prefabrication of bimetal composite pipeline |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1354061A (en) * | 2000-11-22 | 2002-06-19 | 中国建筑第八工程局工业设备安装公司一公司 | Stainless steel composite pipe welding method |
| CN103357998B (en) * | 2012-03-29 | 2015-12-16 | 中国化学工程第四建设有限公司 | Dual-metal clad steel pipe welding method |
| CN105127568A (en) * | 2015-08-10 | 2015-12-09 | 安徽富煌钢构股份有限公司 | Double-metal composite tube welding technique |
-
2021
- 2021-06-18 CN CN202110676475.2A patent/CN113579426B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07314174A (en) * | 1994-05-20 | 1995-12-05 | Nippon Steel Corp | Pipe making welding method of clad stainless steel pipe |
| CN103331327A (en) * | 2013-05-27 | 2013-10-02 | 中国石油天然气集团公司 | Bimetal composite pipe girth welding method |
| CN111843105A (en) * | 2020-07-28 | 2020-10-30 | 沧州隆泰迪管道科技有限公司 | Automatic backing welding process for prefabrication of bimetal composite pipeline |
Non-Patent Citations (5)
| Title |
|---|
| 316L+20G不锈钢复合管焊接技术;杨胜金等;《焊接》;20061231(第01期);第58-61页 * |
| L245NCS/316L复合输气管道的焊接技术;周培山等;《天然气工业》;20161130(第11期);第96-101页 * |
| Q245R+022Cr19Ni10复合管焊接工艺;李国平等;《焊接技术》;20160930;第77-79页 * |
| 不锈钢衬层双金属复合管的焊接;徐志友;《装备制造》;20100401(第04期);第217页 * |
| 双金属复合管环焊工艺及接头强度设计现状与趋势;杨专钊等;《油气储运》;20170331(第03期);第241-248+254页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113579426A (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113579426B (en) | Welding method for stainless steel pipeline lined in butt joint section | |
| CN103624378B (en) | Pipeline Hot Wire TIG Welding connects method | |
| CN100450688C (en) | Thin-wall stainless steel double-layer and carbon steel base layer composite tube girth weld welding method | |
| CN103008988B (en) | The method of internal joint patch weldering exempted from by a kind of anticorrosive steel pipeline | |
| CN101623790B (en) | Welding method of cupronickel weldment | |
| CN101362249A (en) | Girth welding method of duplex stainless steel bimetal composite pipe | |
| CN109623099A (en) | Helical blade wearing layer alloy welding deposit technique | |
| CN101927390A (en) | Method for welding circumferential weld between metal thin-wall clad layer and base layer of clad pipe | |
| CN106903399B (en) | The high strength pipe semiautomatic welding method of X80 or more grade of steel | |
| CN115026390B (en) | Bimetal composite pipe welding method | |
| CN102091852A (en) | Method for welding copper nickel pipe | |
| CN106583951A (en) | Large aperture thick wall nickel alloy composite tube butt welding process | |
| US9126130B2 (en) | Fluid vessel with abrasion and corrosion resistant interior cladding | |
| US11655929B2 (en) | Reducing the risk of corrosion in pipelines | |
| CN111151845A (en) | Main loop of nuclear main pump test bed and inner wall surfacing and circumferential weld butt welding method thereof | |
| CN110773890A (en) | Circumferential welding method for stainless steel metallurgical composite pipe | |
| CN116551127A (en) | Phenol acetone TP2205 double-phase pipeline welding construction method | |
| CN106513949A (en) | Non-filling argon protective butt welding method suitable for inner walls of small and medium-diameter austenitic stainless steel pipes | |
| CN201140884Y (en) | Soldering structure of container housing made by zirconium steel composite board | |
| CN112439981B (en) | Butt joint method of corrosion-resistant alloy prefabricated inner joint coating steel pipe | |
| JP6054533B2 (en) | System for the production of clad materials using resistance seam welding | |
| CN106885068A (en) | A kind of joint coating on pipeline structure | |
| CN105014203A (en) | Welding process of high-quality carbon steel pipelines | |
| CN113634853B (en) | Method for welding composite steel pipeline with material of 1-1/4Cr-1/2Mo +410S | |
| CN115041786B (en) | Welding method for WC9 pearlite heat-resistant steel and P36 low alloy steel dissimilar steel pipeline |
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 |