CN105478964A - Surfacing welding technology for large-area anti-corrosion layers of tube plate - Google Patents
Surfacing welding technology for large-area anti-corrosion layers of tube plate Download PDFInfo
- Publication number
- CN105478964A CN105478964A CN201610067535.XA CN201610067535A CN105478964A CN 105478964 A CN105478964 A CN 105478964A CN 201610067535 A CN201610067535 A CN 201610067535A CN 105478964 A CN105478964 A CN 105478964A
- Authority
- CN
- China
- Prior art keywords
- welding
- tube sheet
- built
- layer
- bead
- 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.)
- Pending
Links
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
- B23K9/04—Welding for other purposes than joining, e.g. built-up welding
- B23K9/042—Built-up welding on planar surfaces
-
- 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
- B23K9/095—Monitoring or automatic control of welding parameters
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The invention discloses a surfacing welding technology for large-area anti-corrosion layers of a tube plate. The technology includes the steps that the tube plate is assembled and positioned, and the portion to-be-welded is cleared; welding equipment is installed and debugged, and welding technological parameters are input; straight welding pass surfacing welding is carried out at the primary side of the tube plate, after one layer is formed through surfacing welding, the tube plate is turned over by 180 degrees, and straight welding pass surfacing welding is carried out at the secondary side of the tube plate; welding operation is repeated until the anti-corrosion layers of the specific thickness are formed at the two sides of the tube plate. According to the welding technology, the deformation of the tube plate can be as low as 1 mm or below after the welding technology is completed, the welding process is stable, weld joints are formed uniformly, fusion between layer passes is good, and the requirement for welding quality of nuclear island main equipment can be met.
Description
Technical field
The present invention relates to Tube-sheet Welding technique, be specifically related to a kind of tube sheet large area anticorrosion layer bead-welding technology.
Background technology
Tube sheet built-up welding is widely used in the manufacturing of the devices such as heat exchanger, especially on the products such as Nuclear island equipment passive residual heat removal heat exchanger, the built-up welding of large area anticorrosion layer is designed with, carry out the method for welding after rigidly fixing for the current domestic main employing of this type of weld seam in downhand position, this method has the shortcomings such as welds prepares time length, workpiece transhipment is inconvenient, pass weld residual stress is large, long in time limit; In addition, because product tube plate thickness is thinner, when adopting conventional large heat input welding method, very easily cause welding deformation, be difficult to the Product jointing standard reaching Nuclear island equipment, therefore, need the automatic soldering technique that exploitation adapts with it badly.
Summary of the invention
In order to overcome the problems referred to above, present inventor has performed and study with keen determination, design a kind of tube sheet large area anticorrosion layer bead-welding technology, make the deflection having welded back tube sheet can be low to moderate≤1mm, and welding process is stablized, appearance of weld is even, and between layer road, fusion is good, can meet the welding quality requirement of nuclear island primary device.
The object of the present invention is to provide tube sheet large area anticorrosion layer bead-welding technology, this technique comprises the following steps:
Step 1), by tube sheet assembling and positioning, and treat welding position and clear up;
Step 2), install, debug welding equipment, input welding condition;
Step 3), string bead built-up welding is carried out at the primary side of tube sheet, after built-up welding one deck, tube sheet is overturn 180 °, carry out string bead built-up welding ground floor at the secondary side of tube sheet, welding bead direction is identical with primary side welding bead direction, heap postwelding, by tubing plate rotating 90 °, the built-up welding tube sheet secondary side second layer, the second layer and ground floor in 90 °, after built-up welding is two-layer, tube sheet is overturn 180 °;
Step 4), the built-up welding tube sheet primary side second layer, built-up welding direction and ground floor in 90 °, heap postwelding, by tubing plate rotating 90 °, built-up welding tube sheet primary side third layer, built-up welding direction is identical with ground floor, after built-up welding is two-layer, tube sheet is overturn 180 °.
Step 5) built-up welding tube sheet secondary side third layer, built-up welding direction and secondary side second layer built-up welding direction in 90 °.
Wherein, the thickness of described tube sheet is 240mm, and material is steel, is preferably SA-508Gr.3Cl.2 steel.
Employing specification is stainless steel or the Nickel-based Welding Strip Surfacing of 60mm × 0.5mm, preferably adopts EQNiCrFe-7A, EQ309L or EQ308L welding.
Step 2) described in welding equipment be EASB manipulator.
Step 2) described in welding condition comprise:
Welding average current is 650 ~ 900A, and weldingvoltage is 25 ~ 32V, and speed of welding is 140 ~ 190mm/min, preheat temperature and interlayer temperature≤177 DEG C in welding process, and welding position is downhand welding.
Step 3) and step 4) welding process in, band pole extension elongation is 20 ~ 30mm, and solder paste thickness is 20 ~ 45mm, and welding bead amount of lap is 6 ~ 14mm.
The thickness of described anticorrosion layer is 7 ~ 10mm.
Carry out welding bead cleaning before welding with in welding process, adopt emery wheel by position to be welded or welding bead surface finish to smooth.
Weld the deflection≤1mm of back tube sheet.
The beneficial effect that the present invention has comprises:
(1) conservative control of interlayer temperature when tube sheet large area anticorrosion layer bead-welding technology provided by the invention passes through thermal weld stress, welding direction, welding position, welding bead quantity and welds, effectively can reduce welding deformation, the deflection having welded back tube sheet can be low to moderate≤1mm;
(2) tube sheet large area anticorrosion layer bead-welding technology provided by the invention decreases the operations such as workpiece rigidly fixes, and is conducive to improving welding efficiency, the reduction of erection time;
(3) tube sheet large area anticorrosion layer bead-welding technology welding process provided by the invention is stablized, and appearance of weld is even, and between layer road, fusion is good, can meet the welding quality requirement of nuclear island primary device.
Accompanying drawing explanation
Fig. 1 illustrates the structural representation of the tube sheet anticorrosion layer welding product according to a kind of preferred embodiment of the present invention.
Drawing reference numeral illustrates:
1-tube sheet
2-anticorrosion layer
A-deflection
Detailed description of the invention
Below by drawings and Examples, the present invention is described in more detail.Illustrated by these, the features and advantages of the invention will become more explicit.
According to the present invention, provide tube sheet large area anticorrosion layer bead-welding technology, this technique comprises the following steps:
Step 1), by tube sheet assembling and positioning, and treat welding position and clear up.
Tube sheet large area anticorrosion layer bead-welding technology provided by the invention is applicable to the tube sheet of specific standard and material, and wherein, the thickness of described tube sheet is 240mm, and material is steel, is preferably SA-508Gr.3Cl.2 steel.
Preferably carry out welding bead cleaning before welding, adopt emery wheel by portion faces polishing to be welded to smooth, to remove the defect, iron rust, oxide skin etc. of portion faces to be welded, then use white non-woven cloth to dip acetone wiping position to be welded, to non-woven fabrics nondiscolouring, to remove moisture and greasy dirt.
Step 2), install, debug welding equipment, input welding condition.
Tube sheet large area anticorrosion layer bead-welding technology provided by the invention preferably adopts EASB manipulator welding equipment to carry out automatic welding, programming Control can be carried out to welding condition and process, comprise welding position, interlayer temperature etc., welding process is stablized, good appearance of weld and welding quality can be obtained, and automaticity is high, Product jointing efficiency can be improved, reduce the duration.
In a preferred embodiment in accordance with the present invention, employing specification is stainless steel or the Nickel-based Welding Strip Surfacing of 60mm × 0.5mm, and preferably adopt EQNiCrFe-7A, EQ309L or EQ308L welding, solder flux is the solder flux that matches, and the granularity of solder flux is 10 ~ 60 orders.
Install above-mentioned welding equipment, debug before using, check equipment, ensure that correct, each function of each connection is normal, welding gas etc. meets the demands.
In Tube-sheet Welding process, control suitable interlayer temperature and be conducive to the distribution of weldment homogeneous temperature, thus effectively reducing temperature stress and the crackle caused thus and welding deformation, it is less than 200 DEG C that the present invention preferably controls weld interpass temperature, is more preferably less than 185 DEG C.
The heat input that during welding, local is uneven is the decisive factor producing welding stress and distortion, the movement of metallic that heat input affects around thermal source, the distortion of final formation welding stress, adopt small area analysis under the prerequisite ensureing welding quality as far as possible, to reduce thermal weld stress, effectively can reduce welding deformation, preferred weld average current of the present invention is 650 ~ 900A, and weldingvoltage is 25 ~ 32V.
According to specification and the material of tube sheet to be welded, to improve welding quality, reduce for the purpose of Tube-sheet Welding deflection, through calculation and test repeatedly, obtain optimized welding condition, to ensure that welding quality stable is reliable, appearance of weld is evenly attractive in appearance and tube plate deformation amount is little, comprising:
Welding average current is 650 ~ 900A, and weldingvoltage is 25 ~ 32V, and speed of welding is 140 ~ 190mm/min, preheat temperature and interlayer temperature≤177 DEG C in welding process, and welding position is downhand welding.
Step 3), string bead built-up welding is carried out at the primary side of tube sheet, after built-up welding one deck, tube sheet is overturn 180 °, carry out string bead built-up welding ground floor at the secondary side of tube sheet, welding bead direction is identical with primary side welding bead direction, heap postwelding, by tubing plate rotating 90 °, the built-up welding tube sheet secondary side second layer, the second layer and ground floor in 90 °, after built-up welding is two-layer, tube sheet is overturn 180 °;
Step 4), the built-up welding tube sheet primary side second layer, built-up welding direction and ground floor in 90 °, heap postwelding, by tubing plate rotating 90 °, built-up welding tube sheet primary side third layer, built-up welding direction is identical with ground floor, after built-up welding is two-layer, tube sheet is overturn 180 °.
Step 5), built-up welding tube sheet secondary side third layer, built-up welding direction and secondary side second layer built-up welding direction in 90 °.
Carry out anticorrosion layer built-up welding at the primary side of tube sheet and secondary side according to the method described above, the welding bead on tube sheet two sides is mutually certain degree, makes weldment reach stress equilibrium on three-dimensional, reduces to greatest extent to weld the tube sheet deformation brought.
In above-mentioned welding process, preferably with pole extension elongation is 20 ~ 30mm, and solder paste thickness is 20 ~ 45mm, and welding bead amount of lap is 6 ~ 14mm.
All need weld each welding bead in welding process before on a welding bead clean, to ensure that welding position meets welding standard, avoid the final welding quality of impurity effect, preferred employing emery wheel will treat that welding bead surface finish is to smooth, to remove the defect, iron rust, oxide skin etc. of portion faces to be welded, then white non-woven cloth is used to dip acetone wiping position to be welded, to non-woven fabrics nondiscolouring, to remove moisture and greasy dirt.
Tube sheet large area anticorrosion layer bead-welding technology described above provided by the invention is adopted to carry out tube sheet heap postwelding testing result as follows:
PT (infiltration), UT (ultrasonic) detect and meet nuclear island primary device anticorrosion layer Requirements of Nondestructive Testing; Corresponding Physicochemical test meets nuclear island primary device requirement.
Said welding method provided by the invention is in conjunction with the tube sheet of specific materials, specification and specific welding condition, during by controlling thermal weld stress, welding direction, welding position, welding bead quantity and welding, interlayer temperature controls welding deformation amount, the deflection having welded back tube sheet can be low to moderate≤1mm, simultaneously, welding procedure welding process provided by the invention is stablized, appearance of weld is even, between layer road, fusion is good, welding product is through every nondestructive testing and physicochemical property test, and its result meets the welding quality requirement of nuclear island primary device.
Embodiment
Carry out anticorrosion layer built-up welding according to said welding method provided by the invention to the tube sheet of nuclear island primary device heat exchanger, wherein, the thickness of tube sheet is 240mm, and material is SA-508Gr.3Cl.2, and concrete welding process is as follows:
Step 1), tube sheet is carried out installation location, use emery wheel by extremely smooth for portion faces polishing to be welded, then dip acetone wiping position to be welded, to non-woven fabrics nondiscolouring with white non-woven cloth;
Step 2), EASB manipulator welding equipment is installed, debugs, checked, input welding condition: welding average current is 650 ~ 900A, weldingvoltage is 25 ~ 32V, and speed of welding is 140 ~ 190mm/min, preheat temperature and interlayer temperature≤177 DEG C in welding process, welding position is downhand welding, use EQNiCrFe-7A or the EQ309L & EQ308L welding that specification is 60mm × 0.5mm, solder flux is the solder flux that matches, and the granularity of solder flux is 10 ~ 60 orders;
Step 3), string bead built-up welding is carried out at the primary side of tube sheet, after built-up welding one deck, tube sheet is overturn 180 °, carry out string bead built-up welding ground floor at the secondary side of tube sheet, welding bead direction is identical with primary side welding bead direction, heap postwelding, by tubing plate rotating 90 °, the built-up welding tube sheet secondary side second layer, the second layer and ground floor in 90 °, after built-up welding is two-layer, tube sheet is overturn 180 °;
Step 4), the built-up welding tube sheet primary side second layer, built-up welding direction and ground floor in 90 °, heap postwelding, by tubing plate rotating 90 °, built-up welding tube sheet primary side third layer, built-up welding direction is identical with ground floor, after built-up welding is two-layer, tube sheet is overturn 180 °;
Step 5) built-up welding tube sheet secondary side third layer, built-up welding direction and secondary side second layer built-up welding direction in 90 °.
Pole extension elongation is with to be 20 ~ 30mm in the process, solder paste thickness is 20 ~ 45mm, welding bead amount of lap is 6 ~ 14mm, simultaneously, welding each welding bead before all on a welding bead clean, welding bead surface finish is to smooth, then dips acetone wiping position to be welded, to non-woven fabrics nondiscolouring with white non-woven cloth to adopt emery wheel to treat;
Welding product detects, and testing result is as follows:
PT, UT detect and meet nuclear island primary device anticorrosion layer Requirements of Nondestructive Testing; Corresponding Physicochemical test meets nuclear island primary device requirement.
Result shows, and the welding product that the present embodiment obtains reaches above-mentioned test stone, meets the welding quality requirement of nuclear island primary device.
In describing the invention, it should be noted that, term " on ", " interior ", the orientation of the instruction such as " outward " or position relationship be based on the orientation under duty of the present invention or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore can not be interpreted as limitation of the present invention.
More than in conjunction with preferred embodiment and exemplary example to invention has been detailed description.But it is to be understood that, these detailed description of the invention are only to illustrative explanations of the present invention, do not form any restriction to protection scope of the present invention.When not exceeding the present invention's spirit and protection domain, can carry out various improvement, equivalencing or modification to the technology of the present invention content and embodiment thereof, these all fall within the scope of protection of the present invention.Protection scope of the present invention is as the criterion with claims.
Claims (9)
1. tube sheet large area anticorrosion layer bead-welding technology, is characterized in that, this technique comprises the following steps:
Step 1), by tube sheet assembling and positioning, and treat welding position and clear up;
Step 2), install, debug welding equipment, input welding condition;
Step 3), string bead built-up welding is carried out at the primary side of tube sheet, after built-up welding one deck, tube sheet is overturn 180 °, carry out string bead built-up welding ground floor at the secondary side of tube sheet, welding bead direction is identical with primary side welding bead direction, heap postwelding, by tubing plate rotating 90 °, the built-up welding tube sheet secondary side second layer, the second layer and ground floor in 90 °, after built-up welding is two-layer, tube sheet is overturn 180 °;
Step 4), the built-up welding tube sheet primary side second layer, built-up welding direction and ground floor in 90 °, heap postwelding, by tubing plate rotating 90 °, built-up welding tube sheet primary side third layer, built-up welding direction is identical with ground floor, after built-up welding is two-layer, tube sheet is overturn 180 °;
Step 5) built-up welding tube sheet secondary side third layer, built-up welding direction and secondary side second layer built-up welding direction in 90 °.
2. welding procedure according to claim 1, is characterized in that, the thickness of described tube sheet is 240mm, and material is steel, is preferably SA-508Gr.3Cl.2 steel.
3. welding procedure according to claim 1 and 2, is characterized in that, employing specification is stainless steel or the Nickel-based Welding Strip Surfacing of 60mm × 0.5mm, preferably adopts EQNiCrFe-7A, EQ309L or EQ308L welding.
4., according to the welding procedure one of claims 1 to 3 Suo Shu, it is characterized in that, step 2) described in welding equipment be EASB manipulator.
5., according to the welding procedure one of Claims 1-4 Suo Shu, it is characterized in that, step 2) described in welding condition comprise:
Welding average current is 650 ~ 900A, and weldingvoltage is 25 ~ 32V, and speed of welding is 140 ~ 190mm/min, preheat temperature and interlayer temperature≤177 DEG C in welding process, and welding position is downhand welding.
6., according to the welding procedure one of claim 1 to 5 Suo Shu, it is characterized in that, step 3) and step 4) welding process in, band pole extension elongation is 20 ~ 30mm, and solder paste thickness is 20 ~ 45mm, and welding bead amount of lap is 6 ~ 14mm.
7. according to the welding procedure one of claim 1 to 6 Suo Shu, it is characterized in that, the thickness of described anticorrosion layer is 7 ~ 10mm.
8. according to the welding procedure one of claim 1 to 7 Suo Shu, it is characterized in that, carry out welding bead cleaning before welding with in welding process, adopt emery wheel by position to be welded or welding bead surface finish to smooth.
9. according to the welding procedure one of claim 1 to 8 Suo Shu, it is characterized in that, welded the deflection≤1mm of back tube sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067535.XA CN105478964A (en) | 2016-02-01 | 2016-02-01 | Surfacing welding technology for large-area anti-corrosion layers of tube plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610067535.XA CN105478964A (en) | 2016-02-01 | 2016-02-01 | Surfacing welding technology for large-area anti-corrosion layers of tube plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105478964A true CN105478964A (en) | 2016-04-13 |
Family
ID=55666426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610067535.XA Pending CN105478964A (en) | 2016-02-01 | 2016-02-01 | Surfacing welding technology for large-area anti-corrosion layers of tube plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105478964A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945440A (en) * | 2016-05-30 | 2016-09-21 | 哈尔滨空调股份有限公司 | Method for preventing pipe plates from welding deformation through strip surfacing of high-pressure air cooler pipe plates |
| CN105945438A (en) * | 2016-05-20 | 2016-09-21 | 浙江工商大学 | Automatic cap welding machine of smoke pipe |
| CN109623105A (en) * | 2018-12-23 | 2019-04-16 | 南京理工大学 | A kind of increase and decrease material Collaborative Manufacturing method |
| CN109623107A (en) * | 2018-12-23 | 2019-04-16 | 南京理工大学 | A kind of increase and decrease material Collaborative Manufacturing change system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03248777A (en) * | 1990-02-27 | 1991-11-06 | Nissan Motor Co Ltd | Build-up welding method for al or al alloy surface |
| CN102350568A (en) * | 2011-09-26 | 2012-02-15 | 张家港化工机械股份有限公司 | Method for preventing tube sheets from deforming during overlaying process |
| CN102990195A (en) * | 2012-12-13 | 2013-03-27 | 常州蓝翼飞机装备制造有限公司 | Surfacing process for corrosion-resistant layers of tube plates of large heat exchangers |
| CN103486429A (en) * | 2013-10-02 | 2014-01-01 | 黑龙江宏宇电站设备有限公司 | Bead weld alloy wear-resisting tube and bead weld manufacturing method thereof |
| CN104002030A (en) * | 2014-06-10 | 2014-08-27 | 中铁宝桥（扬州）有限公司 | Butt joint method for super-thick steel plates |
| CN104148773A (en) * | 2014-08-04 | 2014-11-19 | 云南大为化工装备制造有限公司 | Method for controlling tailor welding deformation of large metal pipe plate |
-
2016
- 2016-02-01 CN CN201610067535.XA patent/CN105478964A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03248777A (en) * | 1990-02-27 | 1991-11-06 | Nissan Motor Co Ltd | Build-up welding method for al or al alloy surface |
| CN102350568A (en) * | 2011-09-26 | 2012-02-15 | 张家港化工机械股份有限公司 | Method for preventing tube sheets from deforming during overlaying process |
| CN102990195A (en) * | 2012-12-13 | 2013-03-27 | 常州蓝翼飞机装备制造有限公司 | Surfacing process for corrosion-resistant layers of tube plates of large heat exchangers |
| CN103486429A (en) * | 2013-10-02 | 2014-01-01 | 黑龙江宏宇电站设备有限公司 | Bead weld alloy wear-resisting tube and bead weld manufacturing method thereof |
| CN104002030A (en) * | 2014-06-10 | 2014-08-27 | 中铁宝桥（扬州）有限公司 | Butt joint method for super-thick steel plates |
| CN104148773A (en) * | 2014-08-04 | 2014-11-19 | 云南大为化工装备制造有限公司 | Method for controlling tailor welding deformation of large metal pipe plate |
Non-Patent Citations (2)
| Title |
|---|
| 王莉等: "AP1000 非能动余热排出热交换器管板堆焊技术", 《压力容器》 * |
| 魏娜然，刘明亮: "大直径16Mn管板堆焊工艺", 《中国重型装备》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105945438A (en) * | 2016-05-20 | 2016-09-21 | 浙江工商大学 | Automatic cap welding machine of smoke pipe |
| CN105945440A (en) * | 2016-05-30 | 2016-09-21 | 哈尔滨空调股份有限公司 | Method for preventing pipe plates from welding deformation through strip surfacing of high-pressure air cooler pipe plates |
| CN109623105A (en) * | 2018-12-23 | 2019-04-16 | 南京理工大学 | A kind of increase and decrease material Collaborative Manufacturing method |
| CN109623107A (en) * | 2018-12-23 | 2019-04-16 | 南京理工大学 | A kind of increase and decrease material Collaborative Manufacturing change system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104816076B (en) | A kind of pipe pipe butt weld technologies for steel method of continuous pipe | |
| CN104384677B (en) | A kind of super-thick steel plate welding method | |
| CN105478964A (en) | Surfacing welding technology for large-area anti-corrosion layers of tube plate | |
| CN105127562B (en) | Method for welding welded joint between stainless steel composite plate and austenitic stainless steel | |
| CN101862942B (en) | Manufacturing process method of whipping-proof steel structure of conventional island main workshop of nuclear power station | |
| CN104741741A (en) | Automatic tube butt joint all-position TIG welding technology for coiled tubing | |
| CN101774063B (en) | Defect repair welding process of stainless steel composite board coating | |
| CN105397241B (en) | A kind of welding method for 610U2L material spherical tanks | |
| CN105689857A (en) | Tower drum manufacturing welding process | |
| CN104816070A (en) | Austenitic stainless steel pipeline welding process | |
| CN102231357B (en) | Construction method for controlling cleanliness of electronic-grade multicrystal-silicon process pipe | |
| CN106903399B (en) | The high strength pipe semiautomatic welding method of X80 or more grade of steel | |
| CN104002023A (en) | Welding process special for thick dissimilar material plate | |
| CN110449703A (en) | A kind of aluminum alloy piping welding technique | |
| CN110355449A (en) | A kind of welding procedure method of Low background stainless steel 06Cr19Ni10 structure | |
| CN103203559A (en) | Automatic traceless fusion welding technology of thin-wall stainless steel clean pipeline | |
| CN104625322B (en) | Large non-standard device thick-plate all-position welding method | |
| CN205342165U (en) | Anti -corrosion overlay of tube sheet large tracts of land and have its tube sheet | |
| CN107538112A (en) | A kind of H profile steel thickness web welding method | |
| CN111014898A (en) | Water-soluble paper argon-filling local protection welding method | |
| CN108994476A (en) | Improve the welding procedure for the J-type groove weld quality that pipe is connected with end socket | |
| CN105583499A (en) | Full-automatic welding method for metal powder-cored wire pipeline girth welding joints | |
| CN104088500A (en) | Method for laying anti-corrosion titanium lining on steel chimney of power plant | |
| CN106514029A (en) | Method for surfacing end of long pipe | |
| CN104416259A (en) | Welding process of water feed pump of nuclear power plant conventional island |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |