CN110899920A - Girth welding method for low-alloy steel low-temperature pressure container tank body - Google Patents
Girth welding method for low-alloy steel low-temperature pressure container tank body Download PDFInfo
- Publication number
- CN110899920A CN110899920A CN201911262815.6A CN201911262815A CN110899920A CN 110899920 A CN110899920 A CN 110899920A CN 201911262815 A CN201911262815 A CN 201911262815A CN 110899920 A CN110899920 A CN 110899920A
- Authority
- CN
- China
- Prior art keywords
- welding
- tank body
- low
- welded
- alloy steel
- 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
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
- B23K9/00—Arc welding or cutting
- B23K9/02—Seam welding; Backing means; Inserts
- B23K9/028—Seam welding; Backing means; Inserts for curved planar 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
- B23K9/16—Arc welding or cutting making use of shielding gas
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2101/00—Articles made by soldering, welding or cutting
- B23K2101/04—Tubular or hollow articles
- B23K2101/12—Vessels
- B23K2101/125—Cans
-
- 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
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/02—Iron or ferrous alloys
- B23K2103/04—Steel or steel alloys
Abstract
The invention belongs to the technical field of girth welding, and particularly relates to a girth welding method for a low-alloy steel low-temperature pressure vessel tank body. The welding method comprises the following steps: processing the welding end of the cylinder section of the tank body to be welded until the welding end meets the welding requirement; debugging the welding equipment until the welding equipment meets the requirements; welding between the circular seams of the cylindrical shell sections of the tank body to be welded in a small-hole penetration type tungsten argon arc mode, and forming a bottoming weld bead on the inner side between the circular seams of the cylindrical shell sections of the tank body; and welding between the circular seams of the shell ring of the tank body to be welded by adopting a deep-melting argon arc welding mode, sequentially forming two cover surface tempering welding beads on the outer sides between the circular seams of the shell ring of the tank body, wherein the inner sides of the cover surface tempering welding beads are positioned on the outer sides of the bottoming welding beads, and the two cover surface tempering welding beads are in butt joint. The invention can improve the welding efficiency, reduce the manual quantity and the manual strength, has better working environment and can ensure the welding quality.
Description
Technical Field
The invention belongs to the technical field of girth welding, and particularly relates to a girth welding method for a low-alloy steel low-temperature pressure vessel tank body.
Background
At present, the circumferential seam of a low-alloy steel low-temperature pressure vessel tank body is an important B-type welding seam, the welding joint coefficient is 1.0, full penetration is required, radiographic inspection or recordable ultrasonic inspection is carried out after welding, radiographic inspection is qualified when the radiographic inspection reaches more than II grade, ultrasonic inspection is qualified when the ultrasonic inspection reaches more than one grade, and the surface of the welding seam has no defects such as cracks, air holes, incomplete fusion, incomplete penetration, undercut and the like.
In the prior art, the girth welding of the low-alloy steel low-temperature pressure vessel tank body mostly adopts double-sided submerged arc welding, namely, the front side welding is firstly carried out, after the front side welding is finished, the back side of a welding seam is back-gouged, the welding seam is ground and then welded, the welding flux is used for protection during the submerged arc welding, the welding flux needs to be dried before the welding, and during the front side welding, the welding flux needs to be padded on the back side by a welding flux pad trolley, so that the.
In carrying out the present invention, the applicant has found that at least the following disadvantages exist in the prior art:
the submerged arc welding method needs double-sided welding, welding flux and a welding flux pad are needed during welding, back gouging needs to be carried out through a carbon arc gouging before back welding, and a carbide layer and a carburized layer need to be removed through polishing after back gouging, so that the process is complex, the production efficiency is low, the welding cost is high, and the welding environment is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a girth welding method for a low-alloy steel low-temperature pressure vessel tank body, which aims to solve the technical problems of complex process, low production efficiency, high welding cost and poor welding environment caused by adopting double-sided submerged arc welding in the prior art.
The invention realizes the purpose through the following technical scheme:
a girth welding method for a low-alloy steel low-temperature pressure vessel tank body comprises the following steps:
processing the welding end of the cylinder section of the tank body to be welded until the welding end meets the welding requirement;
debugging the welding equipment until the welding equipment meets the requirements;
welding between the circular seams of the cylindrical shell sections of the tank body to be welded in a small-hole penetration type tungsten argon arc mode, and forming a bottoming weld bead on the inner side between the circular seams of the cylindrical shell sections of the tank body;
and welding between the circular seams of the shell ring of the tank body to be welded by adopting a deep-melting argon arc welding mode, sequentially forming two cover surface tempering welding beads on the outer sides between the circular seams of the shell ring of the tank body, wherein the inner sides of the cover surface tempering welding beads are positioned on the outer sides of the bottoming welding beads, and the two cover surface tempering welding beads are in butt joint.
Further, adopt the welding of aperture penetrating type tungsten electrode argon arc mode between the jar body shell ring circumferential weld of treating the welding, inboard formation bottoming weld pass between jar body shell ring circumferential weld specifically includes:
when a small-hole penetrating type tungsten electrode argon arc mode is adopted to weld between circular seams of a cylinder section of a tank body to be welded, two paths of gas of nozzle welding shielding gas and back shielding gas are adopted to simultaneously protect, wherein after the back shielding gas is delivered for 15-20 seconds in advance, an argon arc welding gun is started to weld, the back shielding gas is always opened in the bottoming weld bead welding process, and the nozzle welding shielding gas and the back shielding gas respectively protect front and back welding seams of the argon arc welding seams;
during welding, the welding current range is 310-380A, the arc voltage range is 16-20V, and the linear velocity is 300-380 mm/min;
and after the cover welding bead is finished, stopping the back shielding gas, and continuously opening the nozzle welding shielding gas.
Furthermore, when a small-hole penetrating argon tungsten-arc welding mode is adopted to weld the circular seams of the shell sections of the tank body to be welded, the nozzle welding protective gas adopts 99.99% pure argon gas, the flow rate is 16-20 l/min, the back gas is 99.99% pure argon or 99.2% industrial nitrogen, and the back gas flow rate is 20-30 l/min.
Further, adopt the deep melting argon arc welding mode to weld between the jar body shell ring circular seam of treating the welding, form twice capping tempering welding bead in proper order in the outside between jar body shell ring circular seam, specifically include:
when a deep-melting argon arc welding mode is adopted to weld between the circular seams of the shell ring of the tank body to be welded, protective gas is welded by a nozzle for protection, the welding current range is 145-175A, the arc voltage range is 12-16V, and the linear speed is (130-170) mm/min.
Further, when a deep-melting argon arc welding mode is adopted to weld the circular seams of the shell ring of the tank body to be welded, the welding shielding gas of the nozzle adopts 99.99% pure argon gas, and the flow rate is 10-18) l/min.
Further, the distance between the center line of the cover surface tempering welding bead and the center line of the backing welding bead is 4-6 mm.
Furthermore, the welding wire used in the backing weld bead and the cover surface tempering weld bead welding is a low alloy steel solid welding wire, the diameter of the welding wire is phi 1.2mm, the model of the welding wire is ER55Ni1, and the Ni content is 0.80-1.10.
Further, debugging the welding equipment until it meets the requirements specifically includes:
and moving the welding gun to the position above the circular seam of the tank body, so that the output end of the welding gun is in a vertical state, the output end of the welding gun is aligned with the position of a bus on the tank body right above the circular seam, and the extension line of the central shaft of the output end of the welding gun passes through the circle center of the circular seam.
Further, when the wall thickness of the tank body is 4-8 mm, the welding end of the tank body shell ring to be welded is not provided with a groove;
when the wall thickness of the tank body is 9-12 mm, a V-shaped groove is formed in the welding end of the tank body shell ring to be welded, the angle of the groove of the V-shaped groove is 70 degrees +/-5 degrees, and the truncated edge is 4-5 mm.
Preferably, the material of the tank body shell ring is low-temperature low-alloy steel 16 MnDR.
The invention has the beneficial effects that:
the invention provides a method for welding the girth joint of a low-alloy steel low-temperature pressure vessel tank body, which is characterized in that a small-hole penetration type tungsten electrode argon arc mode is firstly adopted to weld between the circular joints of the tank body shell ring sections to be welded, so that a bottoming weld bead is formed on the inner side between the circular joints of the tank body shell ring sections, and the bottoming weld bead is formed by welding in the small-hole penetration type tungsten electrode argon arc mode, so that the good penetration capability of a deep-melting argon arc welding compression electric arc can be utilized to achieve single-side welding back surface forming, further double-side welding is not needed, root cleaning is also not needed, the welding efficiency can be improved, the labor quantity and the labor intensity are reduced, and a better working; and then, welding between the circular seams of the shell ring of the tank body to be welded in a deep-melting argon arc welding mode, and sequentially forming two cover surface tempering welding beads on the outer sides between the circular seams of the shell ring of the tank body, so that the welding device not only can be used for filling and cover surface welding, but also can temper the bottoming welding beads, thereby improving the performance between welding bead joints and ensuring the welding quality.
In addition, the invention can reduce the welding cost and improve the welding efficiency because the deep melting argon arc welding does not need to use welding flux and a welding flux pad, and has good practicability.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart of a girth welding method for a low-alloy steel low-temperature pressure vessel tank body according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a tank body with a wall thickness of 4-8 mm after girth welding;
FIG. 3 is a schematic view of the can body after girth welding with a wall thickness of 9 to 12 mm. .
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The girth welding method for the low-alloy steel low-temperature pressure vessel tank body provided by the embodiment of the invention is designed for the 16MnDR tank body shell ring weld made of low-alloy steel, and the main core idea is to perform single-side welding and double-side forming so as to achieve the purposes of improving the operation efficiency, reducing the labor intensity, saving the welding cost and ensuring the joint performance.
Fig. 1 is a schematic flow chart of a girth welding method for a low-alloy steel low-temperature pressure vessel tank according to an embodiment of the invention, and with reference to fig. 1, the welding method according to the embodiment of the invention includes:
and S1, processing the welding end of the can body shell ring to be welded until the welding end meets the welding requirement.
In the embodiment of the invention, the processing of the welding end of the cylinder section of the tank body to be welded also comprises the processing of the groove of the welding end besides the common cleaning and grinding.
For the embodiment of the invention, when the wall thickness of the tank body is 4-8 mm, the welding end of the tank body cylinder section to be welded is not provided with a groove (as shown in fig. 2), because the deep-melting argon arc welding compression arc adopted in the subsequent welding has good penetration capability, and the purpose of single-side welding and back molding can be achieved when the tank body cylinder section with the wall thickness is welded.
When the wall thickness of the tank body is 9-12 mm, because the wall thickness of the tank body is thick, when the tank body shell ring with the wall thickness is welded, single-side welding back forming may not be achieved, therefore, in the embodiment of the invention, for the tank body with the wall thickness, a V-shaped groove (as shown in fig. 3) is formed at the welding end of the tank body shell ring to be welded, the angle α of the groove of the V-shaped groove is 70 degrees +/-5 degrees, and the blunt edge p is 4-5 mm, so that the purpose of single-side welding back forming in subsequent welding is ensured.
And S2, debugging the welding equipment to meet the requirements.
In the embodiment of the invention, the debugging of the welding equipment comprises the assembly of the shell ring of the tank body, the posture setting of a welding gun, the selection of a welding wire and the setting of welding parameters.
Specifically, the method comprises the steps of hoisting the tank shell section assembly part to be welded with the circular seam to a roller frame, and adjusting the gap b between the welding ends of the tank shell section to be 0-0.5 mm; the purpose of assembling the tank shell ring of the circular seam to be welded to the roller frame is as follows: during subsequent welding, the roller carrier can be opened, and the rotation of the roller carrier is utilized to drive the rotation of the tank body cylinder section, so that the welding gun can keep a posture, and the welding of one circumference of the tank body cylinder section can be completed.
In addition, the attitude of the welding gun is set as follows: and moving the welding gun to the position above the circular seam of the tank body to enable the output end of the welding gun to be in a vertical state, aligning the output end of the welding gun to the position of a bus on the tank body right above the circular seam, and enabling the extension line of the central shaft of the output end of the welding gun to pass through the circle center of the circular seam.
The welding wire provided by the embodiment of the invention is a low alloy steel solid welding wire with the diameter of phi 1.2mm, the model of the welding wire is ER55Ni1, the Ni content is 0.80-1.10, and the welding wire is fed in a filling mode, the welding wire has good process performance, the tensile strength Rm of a welding joint is higher than that of a base metal, the 180-degree bending performance is qualified, the impact absorption power KV2 reaches over 27J, and the welding wire is aligned to the center of an arc area and is positioned 2-5mm below the extreme part of tungsten during conveying.
S3: and welding between the circular seams of the shell sections of the tank body to be welded by adopting a small-hole penetration type tungsten argon arc mode, and forming a bottoming weld bead on the inner side between the circular seams of the shell sections of the tank body.
When a small-hole penetrating type tungsten electrode argon arc mode is adopted to weld between circular seams of a cylinder section of a tank body to be welded, nozzle welding shielding gas and back gas retaining two-way gas are adopted to simultaneously protect, the nozzle welding shielding gas adopts 99.99% pure argon gas, the flow rate is 16-20 l/min, the back gas retaining adopts 99.99% pure argon or 99.2% industrial nitrogen, the back gas retaining flow rate is 20-30 l/min, after the back gas retaining is delivered for 15-20S in advance, an argon arc welding gun is started for welding, the back gas retaining is opened all the time in the bottoming welding bead welding process, and the nozzle welding shielding gas and the back gas retaining respectively protect front and back welding seams of the argon arc welding seams;
during welding, the welding current range is 310-380A, the arc voltage range is 16-20V, and the linear velocity is 300-380 mm/min;
and after the cover welding bead is finished, stopping the back shielding gas, and continuously opening the nozzle welding shielding gas.
S4: and welding between the circular seams of the cylinder sections of the tank body to be welded by adopting a deep-melting argon arc welding mode, sequentially forming two cover surface tempering welding beads on the outer sides between the circular seams of the cylinder sections of the tank body, wherein the inner sides of the two cover surface tempering welding beads are positioned on the outer sides of the bottoming welding beads, and the two cover surface tempering welding beads are butted.
When a deep-melting argon arc welding mode is adopted to weld the circular seams of the shell ring of the tank body to be welded, nozzle welding shielding gas is adopted for protection, the nozzle welding shielding gas adopts 99.99% pure argon gas, the flow rate is 10-18) l/min, the welding current range is 145-175A, the arc voltage range is 12-16V, and the linear speed is (130-170) mm/min.
The schematic diagram of the welded circular seam of the tank body with the wall thickness delta of 4-8 mm is shown in figure 2, and the schematic diagram of the welded circular seam of the tank body with the wall thickness delta of 9-12 mm is shown in figure 3. With reference to fig. 2 and 3, after welding, the distance between the center line of the cover tempering bead 2 and the center line of the backing bead 1 is 4 to 6 mm.
Table 1 shows a comparison table of the effect of the weld impact test, and it can be known from table 1 that the girth welding method for the low alloy steel low temperature pressure vessel tank body shown in the embodiment of the present invention has higher central impact energy of the weld compared with the conventional welding method.
| Base material | Weld impact test temperature | Weld center impact energy KV2 | |
| Conventional welding method | 16MnDR | -40℃ | 10J～24J |
| The welding method | 16MnDR | -40℃ | ＞29J |
TABLE 1
The embodiment of the invention has the beneficial effects that:
1. because the backing weld bead is welded by adopting a small-hole penetration type argon tungsten-arc welding mode, the back surface of the single-side weld can be formed by utilizing the good penetration capacity of a deep-melting argon arc welding compressed electric arc, so that double-side welding is not needed, back chipping is also not needed, the welding efficiency can be improved, the manual quantity and the manual strength are reduced, and a better working environment is also provided;
2. because the deep-melting argon arc welding mode is adopted to weld between the circular seams of the shell ring of the tank body to be welded, and two cover surface tempering welding beads are sequentially formed on the outer sides between the circular seams of the shell ring of the tank body, the welding device not only can be used for filling and cover surface welding, but also can temper the bottoming welding beads so as to improve the performance between welding bead joints and ensure the welding quality.
3. When the circular seam of the tank body is welded, the groove can be omitted or formed in a small size, the amount of welding filler metal is small, the consumption of welding materials is low, and the welding cost is saved.
4. In the welding process, only gas protection is needed, and flux protection and a flux liner are not needed, so that flux is saved, drying is performed, labor cost is saved, labor intensity of welders is reduced, and welding sites are clean.
5. The welding quality is excellent, and the purposes of refining crystal grains and improving the strength and toughness of the joint can be achieved through the filling of Ni-containing welding wires and a tempering welding bead when the annular joint with higher requirement on the toughness of the joint, especially the low-temperature low-alloy steel 16MnDR thin plate welding seam, has high requirement on low-temperature impact power.
The following embodiments are provided for the purpose of illustrating the present invention and are not to be construed as limiting the present invention in any way, and it will be apparent to those skilled in the art that the technical features of the present invention can be modified or changed in some ways without departing from the scope of the present invention.
Claims (10)
1. A girth welding method for a low-alloy steel low-temperature pressure vessel tank body is characterized by comprising the following steps:
processing the welding end of the cylinder section of the tank body to be welded until the welding end meets the welding requirement;
debugging the welding equipment until the welding equipment meets the requirements;
welding between the circular seams of the cylindrical shell sections of the tank body to be welded in a small-hole penetration type tungsten argon arc mode, and forming a bottoming weld bead on the inner side between the circular seams of the cylindrical shell sections of the tank body;
and welding between the circular seams of the shell ring of the tank body to be welded by adopting a deep-melting argon arc welding mode, sequentially forming two cover surface tempering welding beads on the outer sides between the circular seams of the shell ring of the tank body, wherein the inner sides of the cover surface tempering welding beads are positioned on the outer sides of the bottoming welding beads, and the two cover surface tempering welding beads are in butt joint.
2. The method for welding the girth joint of the tank body of the low-alloy steel low-temperature pressure vessel according to claim 1, wherein the tank body shell ring joints to be welded are welded by adopting a small-hole penetration argon tungsten-arc welding mode, and a bottoming weld bead is formed on the inner side between the tank body shell ring joints, and the method specifically comprises the following steps:
when a small-hole penetrating type tungsten electrode argon arc mode is adopted to weld between circular seams of a cylinder section of a tank body to be welded, two paths of gas of nozzle welding shielding gas and back shielding gas are adopted to simultaneously protect, wherein after the back shielding gas is delivered for 15-20 seconds in advance, an argon arc welding gun is started to weld, the back shielding gas is always opened in the bottoming weld bead welding process, and the nozzle welding shielding gas and the back shielding gas respectively protect front and back welding seams of the argon arc welding seams;
during welding, the welding current range is 310-380A, the arc voltage range is 16-20V, and the linear velocity is 300-380 mm/min;
and after the cover welding bead is finished, stopping the back shielding gas, and continuously opening the nozzle welding shielding gas.
3. The method for welding the girth joint of the tank body of the low-alloy steel low-temperature pressure vessel according to claim 2, wherein when a small-hole penetration type argon tungsten-arc welding mode is adopted to weld the circular joints of the tank body and the shell ring to be welded, 99.99% pure argon is adopted as the nozzle welding shielding gas, the flow rate is 16-20 l/min, 99.99% pure argon or 99.2% industrial nitrogen is adopted as the back shielding gas, and the flow rate of the back shielding gas is 20-30 l/min.
4. The method for welding the girth joint of the tank body of the low-alloy steel low-temperature pressure vessel according to claim 2, wherein the tank body shell ring joints to be welded are welded by adopting a deep-melting argon arc welding mode, and two cover surface tempering welding beads are sequentially formed on the outer side between the tank body shell ring joints, and the method specifically comprises the following steps:
when a deep-melting argon arc welding mode is adopted to weld between the circular seams of the shell ring of the tank body to be welded, protective gas is welded by a nozzle for protection, the welding current range is 145-175A, the arc voltage range is 12-16V, and the linear speed is (130-170) mm/min.
5. The method for welding the girth joint of the tank body of the low-alloy steel low-temperature pressure vessel according to claim 4, wherein when the deep-melting argon arc welding mode is adopted to weld the circular seams of the shell ring of the tank body to be welded, the nozzle welding shielding gas adopts 99.99% pure argon gas, and the flow rate is 10-18) l/min.
6. The method of girth welding a low alloy steel low temperature pressure vessel tank according to claim 1, wherein a distance between a center line of the facing tempering bead and a center line of the backing bead is 4 to 6 mm.
7. The girth welding method for the low-alloy steel low-temperature pressure vessel tank body according to claim 1, wherein the welding wire used for welding the backing weld bead and the cover tempering weld bead is a low-alloy steel solid welding wire, the diameter of the welding wire is phi 1.2mm, the type of the welding wire is ER55Ni1, and the Ni content is 0.80-1.10.
8. The girth welding method for the low-alloy steel low-temperature pressure vessel tank body according to claim 1, wherein the debugging of the welding equipment until the welding equipment meets the requirements specifically comprises the following steps:
and moving the welding gun to the position above the circular seam of the tank body, so that the output end of the welding gun is in a vertical state, the output end of the welding gun is aligned with the position of a bus on the tank body right above the circular seam, and the extension line of the central shaft of the output end of the welding gun passes through the circle center of the circular seam.
9. The method of girth welding a low alloy steel low temperature pressure vessel tank of claim 1,
when the wall thickness of the tank body is 4-8 mm, the welding end of the tank body shell ring to be welded is not provided with a groove;
when the wall thickness of the tank body is 9-12 mm, a V-shaped groove is formed in the welding end of the tank body shell ring to be welded, the angle of the groove of the V-shaped groove is 70 degrees +/-5 degrees, and the truncated edge is 4-5 mm.
10. The method of girth welding a low alloy steel cryogenic pressure vessel tank according to claim 1, characterized in that the material of the tank shell section is low temperature low alloy steel 16 MnDR.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262815.6A CN110899920A (en) | 2019-12-11 | 2019-12-11 | Girth welding method for low-alloy steel low-temperature pressure container tank body |
| PCT/CN2020/105839 WO2021114686A1 (en) | 2019-12-11 | 2020-07-30 | Circular seam welding method for low-alloy steel low temperature pressure vessel tank body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911262815.6A CN110899920A (en) | 2019-12-11 | 2019-12-11 | Girth welding method for low-alloy steel low-temperature pressure container tank body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110899920A true CN110899920A (en) | 2020-03-24 |
Family
ID=69824071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911262815.6A Pending CN110899920A (en) | 2019-12-11 | 2019-12-11 | Girth welding method for low-alloy steel low-temperature pressure container tank body |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110899920A (en) |
| WO (1) | WO2021114686A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112475551A (en) * | 2020-10-30 | 2021-03-12 | 中车长江车辆有限公司 | Girth welding method for thin-wall tank body of low-alloy steel low-temperature pressure container |
| CN112894083A (en) * | 2021-01-27 | 2021-06-04 | 广船国际有限公司 | Automatic butt welding method for 9Ni steel of marine storage tank |
| WO2021114686A1 (en) * | 2019-12-11 | 2021-06-17 | 中车长江车辆有限公司 | Circular seam welding method for low-alloy steel low temperature pressure vessel tank body |
| CN117798459A (en) * | 2024-02-29 | 2024-04-02 | 鞍山华信重工机械有限公司 | Spherical pressure storage tank welding method and system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002001539A (en) * | 2000-06-20 | 2002-01-08 | Babcock Hitachi Kk | Welding method for different material |
| CN101474702A (en) * | 2008-01-02 | 2009-07-08 | 上海贤达罗兰压力容器制造有限公司 | Biphase steel SA-240 S31803 handwork tungsten electrode argon arc GTAW welding process |
| CN107824943A (en) * | 2017-09-22 | 2018-03-23 | 广东福维德焊接股份有限公司 | A kind of depth melts arc-welding double welding gun welding procedure |
| CN107838538A (en) * | 2017-12-15 | 2018-03-27 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of titanium alloy pipeline all-position Plasma Welding process |
| CN108247228A (en) * | 2017-12-29 | 2018-07-06 | 兰州兰石重型装备股份有限公司 | A kind of thin-wall stainless steel intelligent and high-efficiency welding method |
| CN109352141A (en) * | 2018-12-18 | 2019-02-19 | 中车长江车辆有限公司 | A kind of welding method of pressure container cylinder circumferential weld |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10202394A (en) * | 1997-01-20 | 1998-08-04 | Babcock Hitachi Kk | Mirror body automatic welding supporting device and mirror body automatic welding method |
| JPH11190495A (en) * | 1997-12-26 | 1999-07-13 | Mitsubishi Materials Corp | Pressure vessel and manufacture therefor |
| CN102357741B (en) * | 2011-09-07 | 2015-03-11 | 无锡市创新化工设备有限公司 | Girth welding technology for vacuum container |
| CN104551344A (en) * | 2013-10-23 | 2015-04-29 | 上海航天精密机械研究所 | Automatic welding method of loop-weld structured but joints |
| CN104646795B (en) * | 2015-02-06 | 2016-09-21 | 中国运载火箭技术研究院 | A kind of weak rigidity of 5M diameter, minor diameter manhole tank joint sealing circular-seam welding method |
| CN110899920A (en) * | 2019-12-11 | 2020-03-24 | 中车长江车辆有限公司 | Girth welding method for low-alloy steel low-temperature pressure container tank body |
-
2019
- 2019-12-11 CN CN201911262815.6A patent/CN110899920A/en active Pending
-
2020
- 2020-07-30 WO PCT/CN2020/105839 patent/WO2021114686A1/en active Application Filing
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002001539A (en) * | 2000-06-20 | 2002-01-08 | Babcock Hitachi Kk | Welding method for different material |
| CN101474702A (en) * | 2008-01-02 | 2009-07-08 | 上海贤达罗兰压力容器制造有限公司 | Biphase steel SA-240 S31803 handwork tungsten electrode argon arc GTAW welding process |
| CN107824943A (en) * | 2017-09-22 | 2018-03-23 | 广东福维德焊接股份有限公司 | A kind of depth melts arc-welding double welding gun welding procedure |
| CN107838538A (en) * | 2017-12-15 | 2018-03-27 | 广东省焊接技术研究所（广东省中乌研究院） | A kind of titanium alloy pipeline all-position Plasma Welding process |
| CN108247228A (en) * | 2017-12-29 | 2018-07-06 | 兰州兰石重型装备股份有限公司 | A kind of thin-wall stainless steel intelligent and high-efficiency welding method |
| CN109352141A (en) * | 2018-12-18 | 2019-02-19 | 中车长江车辆有限公司 | A kind of welding method of pressure container cylinder circumferential weld |
Non-Patent Citations (3)
| Title |
|---|
| 佚名: "《http://bbs.toweld.com/simple/t117564.html》", 5 November 2015 * |
| 全国压力容器标准化: "《压力容器焊工问答》", 31 May 1989 * |
| 建筑工人职业技能培训教材编委会: "《安装工程系列 电焊工》", 30 September 2016 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021114686A1 (en) * | 2019-12-11 | 2021-06-17 | 中车长江车辆有限公司 | Circular seam welding method for low-alloy steel low temperature pressure vessel tank body |
| CN112475551A (en) * | 2020-10-30 | 2021-03-12 | 中车长江车辆有限公司 | Girth welding method for thin-wall tank body of low-alloy steel low-temperature pressure container |
| CN112894083A (en) * | 2021-01-27 | 2021-06-04 | 广船国际有限公司 | Automatic butt welding method for 9Ni steel of marine storage tank |
| CN117798459A (en) * | 2024-02-29 | 2024-04-02 | 鞍山华信重工机械有限公司 | Spherical pressure storage tank welding method and system |
| CN117798459B (en) * | 2024-02-29 | 2024-04-30 | 鞍山华信重工机械有限公司 | Spherical pressure storage tank welding method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021114686A1 (en) | 2021-06-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110899920A (en) | Girth welding method for low-alloy steel low-temperature pressure container tank body | |
| CN104096954A (en) | Double two-sided synchronous tungsten electrode high-frequency pulse argon arc welding butt welding method | |
| CN109352141A (en) | A kind of welding method of pressure container cylinder circumferential weld | |
| CN108788385B (en) | Welding method of stainless steel composite plate with Q345R low alloy steel as base layer and 904L stainless steel as multiple layers | |
| CN107442891A (en) | A kind of cut deal body longitudinal and girth welding joint and welding procedure | |
| CN106903399B (en) | The high strength pipe semiautomatic welding method of X80 or more grade of steel | |
| CN102909465A (en) | Titanium tube welding gas protection cover of fixed welding gun | |
| CN103567613A (en) | Welding process for tank car with stainless steel composite plate | |
| CN109877423A (en) | The 9% nickel steel welding procedure based on dynamic wire feed heated filament argon arc welding | |
| CN203918200U (en) | A kind of copper liner | |
| CN108723557A (en) | A kind of welding method of cylinder | |
| CN105618904B (en) | A kind of assembling and welding process of the narrow-clearance submerged arc welding divided edge structure of large thick-wall oil cylinder | |
| CN108544055B (en) | Full-automatic surfacing method for 58% nickel-based alloy in groove of combustion chamber of cylinder cover | |
| CN103737162A (en) | Compound welding method | |
| CN102528304B (en) | Plate butt welding method and welding groove | |
| CN103551711A (en) | High-efficiency single-pass one-side welding with back formation method for moderately thick plate butting | |
| CN101590572A (en) | The vertical double-sided double-arc plasma symmetry welding method | |
| CN100999036A (en) | Welding technology of bridge shell and spindle nose welding | |
| CN111069746B (en) | Double-sided double-arc gas shielded welding process for ultrahigh-strength steel | |
| CN108941852A (en) | A kind of welding method of aviation high-pressure conduit | |
| CN108890092B (en) | Method for single-side welding and double-side forming of fusion electrode MAG welding tube plate | |
| CN101704162B (en) | Electroslag welding method for cylindrical longitudinal seam V groove | |
| CN110328492B (en) | A-TIG welding repair compound method for long cracks of aero-engine turbine rear casing support plate | |
| CN112894083A (en) | Automatic butt welding method for 9Ni steel of marine storage tank | |
| CN112475551A (en) | Girth welding method for thin-wall tank body of low-alloy steel low-temperature pressure container |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200324 |