CN114055077A - Construction method for large connecting pipe reinforcing section of second dehydrogenation reactor of styrene device - Google Patents
Construction method for large connecting pipe reinforcing section of second dehydrogenation reactor of styrene device Download PDFInfo
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- CN114055077A CN114055077A CN202111228072.8A CN202111228072A CN114055077A CN 114055077 A CN114055077 A CN 114055077A CN 202111228072 A CN202111228072 A CN 202111228072A CN 114055077 A CN114055077 A CN 114055077A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 52
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000006356 dehydrogenation reaction Methods 0.000 title claims abstract description 26
- 238000003466 welding Methods 0.000 claims abstract description 88
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 14
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 238000007514 turning Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 6
- 239000000463 material Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
- B23K31/027—Making tubes with soldering or welding
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The application relates to a construction method of a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device, which belongs to the technical field of dehydrogenation reactor construction and comprises the following steps; adjusting the typesetting; the whole size of the reinforcing section is 5200 multiplied by 5640mm, the height is 3 sections, and the sections are longitudinally and horizontally laid; installing a moon-shaped plate; two moon-shaped plates are respectively added on the upper reinforcing plate and the lower reinforcing plate, namely the length is 7100 mm; welding and assembling the cylinder body; manufacturing a 4-horizontal 4-vertical tool according to the shape of a cylinder in a workshop, assembling a moon-shaped plate and an upper reinforcing plate and a lower reinforcing plate on the tool, fixing, standing up, and welding a connecting joint; constructing a reinforcing section; and (3) independently setting sections for construction according to the height of the reinforcing section on a construction site, setting a vertical plate tool for fixing roundness according to the diameter of equipment, adjusting levelness, and assembling and welding a 50mm cylinder on the tool to form a longitudinal annular seam. Adopt the circular seam difference in height to stagger the cross welding seam simultaneously, can reduce the round circular seam, this application has the effect that reduces welded work load, improves holistic efficiency of construction.
Description
Technical Field
The application relates to the technical field of dehydrogenation reactor construction, in particular to a construction method of a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device.
Background
Dehydrogenation reactions of organic compounds at high temperatures in the presence of catalysts (chromium oxide, iron oxide, etc.) or dehydrogenaters (sulfur or selenium, etc.) are one form of oxidation reactions. Dehydrogenation reactor units are commonly used in the dehydrogenation of styrene.
In the related technology, during the assembly of the second dehydrogenation reactor, the construction is usually carried out by adopting the processes of respectively circling plates, assembling and welding a single-section cylindrical section, assembling and welding a circular seam into a large section, perforating a large connecting pipe, additionally installing an anti-deformation tool, assembling and welding the large connecting pipe and carrying out RT detection.
With respect to the related art among the above, the inventors consider that there is a defect: in the related art, all-position welding is needed in the construction process, the construction efficiency is low, the requirement on the skill is high in the construction process, and a workpiece is easy to deform, so that the irregular deformation of the whole section of the cylinder is caused.
Disclosure of Invention
In order to improve the construction efficiency and reduce the deformation of a workpiece in the welding process, the application provides a construction method for a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device.
The application provides a construction method for a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device, which adopts the following technical scheme:
a construction method for a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device comprises the following steps;
a. adjusting the typesetting; the whole size of the reinforcing section is 5200 multiplied by 5640mm, the height is 3 sections, and the sections are longitudinally and horizontally laid;
b. installing a moon-shaped plate; two moon-shaped plates are respectively added on the upper reinforcing plate and the lower reinforcing plate, namely the length is 7100 mm;
c. welding and assembling the cylinder body; manufacturing a 4-horizontal 4-vertical tool according to the shape of a cylinder in a workshop, assembling a moon-shaped plate and an upper reinforcing plate and a lower reinforcing plate on the tool, fixing, standing up, and welding a connecting joint;
d. constructing a reinforcing section; and (3) independently setting sections for construction according to the height of the reinforcing section on a construction site, setting a vertical plate tool for fixing roundness according to the diameter of equipment, adjusting levelness, and assembling and welding a 50mm cylinder on the tool to form a longitudinal annular seam.
By adopting the technical scheme, when typesetting and adjusting, the whole size of the reinforcing section is set to be the same, the reinforcing section is typeset in a longitudinal alignment mode, and meanwhile, the cross-shaped welding seam is staggered by adopting the height difference of the circular seams, so that the circular seams can be reduced, the welding workload is reduced, and the whole construction efficiency is improved.
Optionally, in the step a, two sections with the height of 2820mm are taken from two sides of the reinforced end, and a longitudinal weld joint is opened by utilizing the height error of the circumferential weld joint.
Through adopting above-mentioned technical scheme, the both sides of strengthening the section adopt high two sections such as waiting, make things convenient for the staff to prepare material and transport, are favorable to further improving the efficiency of construction, utilize the circumferential weld to stagger the longitudinal joint simultaneously, are favorable to controlling the heat altered shape of work piece, are favorable to controlling the shape of barrel, improve construction quality.
Optionally, in the step c, a double-sided synchronous and segmented welding manner is adopted when the circular seam is welded.
By adopting the technical scheme, the mode of synchronously welding the two sides can ensure that the welding seam can be welded through, the damage of bubbles and the like in the welding seam is reduced, the quality of the welding seam is favorably improved, the segmented construction can avoid the large internal stress accumulated in the workpiece, and the shape of the cylinder is favorably controlled.
Optionally, after the circular seam welding in step c is completed, the welded workpiece needs to be sent into a flaw detection chamber for performing flaw detection on the welded seam.
Through adopting above-mentioned technical scheme, detect the welding seam, strict the quality of accuse welding seam, the damage appears in avoiding appearing the welding seam, improves the quality of barrel.
Optionally, in the step c, after the detection of the welding seam of the workpiece is completed, a hole is formed, a large connecting pipe is installed, then the joint of the large connecting pipe is welded, and multiple times of turning and two-side welding are adopted in the welding process.
By adopting the technical scheme, the two sides of the welding head are turned over for many times in the welding process, so that the accumulated internal stress of the welding position can be reduced, the deformation of the welding position is reduced, the two sides of the welding head can be welded thoroughly, the quality of the welding seam is improved, and the construction efficiency is improved.
Optionally, in the step c, after the welding of the large adapter tube is completed, flaw detection is performed on the welding seam, the tool is removed after the welding seam is qualified, the local part of the workpiece is corrected, and after the welding seam and the shape of the workpiece are both qualified, the workpiece is sent to a construction site by a worker for assembly.
Optionally, in the step d, when the worker welds the circular seam, the support frames are installed in the middle and the upper port of the cylinder body to ensure the roundness of the cylinder body.
Through adopting above-mentioned technical scheme, at the in-process of barrel welding, the barrel can take place thermal deformation under the effect of internal stress, and the support frame can provide certain support to the inner wall of barrel to reduce the thermal deformation that the barrel produced in welding process.
Optionally, in the step d, when the worker installs the support frame, the position of the reinforcing plate is reserved, and the size of the opening is controlled.
Optionally, in the step d, a worker inserts the reinforcing section into the opening, and then performs local correction on the barrel and the reinforcing section according to actual conditions, so as to assemble the longitudinal joint in an unstressed state.
By adopting the technical scheme, the shapes of the barrel and the reinforcing section are corrected before the reinforcing section is assembled, so that the thermal deformation of welding the barrel and the reinforcing section can be reduced, and the shape of a workpiece can be controlled.
Optionally, in the step d, when welding the longitudinal seam, a worker welds the longitudinal seam by adopting a double-sided synchronous and sectional welding mode, thins the longitudinal seam plate by 80mm to 50mm after welding, and performs flaw detection on the longitudinal seam.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the long straight seam circular seam dislocation method is adopted for brand new barrel typesetting, one circular seam is reduced, the welding workload is shortened, the construction efficiency is improved, the construction period is shortened, and meanwhile, the long straight seam typesetting is in accordance with the pressure container standard;
2. the assembly welding deformation control of the large connecting pipe reinforcing section is superior to that of the traditional method, and the reliability of the cylinder roundness control of the unstressed embedded cylinder assembly welding is higher;
3. in the aspect of quality control, the quality of the large connecting pipe is guaranteed, the weld joint is formed well, flat welding is adopted to replace all-position welding, the welding difficulty is reduced, and the quality can be guaranteed better.
Drawings
FIG. 1 is a schematic construction flow diagram according to an embodiment of the present application.
Detailed Description
The present application is described in further detail below with reference to fig. 1.
The embodiment of the application discloses a construction method of a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device.
Referring to fig. 1, a construction method of a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device comprises the following steps:
a. adjusting the typesetting; the whole size of the reinforcing section is 5200 multiplied by 5640mm, the height is 3 sections, and the sections are longitudinally and horizontally laid; two sections with the same height of 2820mm are taken from the 50mm plates on the two sides, and the height difference of the ring is utilized to stagger the longitudinal welding line, so that 1 circle of circular seam can be reduced;
b. installing a moon-shaped plate; two moon-shaped plates are respectively added on the upper reinforcing plate and the lower reinforcing plate, the length is 5200+1300 (the length is increased by 100) +600 (the allowance of a pressure head) =7100mm, only 2 moon-shaped plates are needed, the two moon-shaped plates are cut after being circled, 3800X 1880mm can be saved at a single position, and 2 moon-shaped plates can be saved at two reinforcing sections;
c. welding and assembling the cylinder body; manufacturing a 4-horizontal 4-longitudinal tool according to the shape of a cylinder in a workshop, assembling a moon-shaped plate and an upper reinforcing plate and a lower reinforcing plate on the tool, fixing, standing, welding 4 sections of circular seams synchronously on two sides, horizontally opening holes after the circular seams enter a flaw detection chamber and an accelerator RT (radio-ray inspection) are qualified, installing a large connecting pipe, turning over the two sides for multiple times, welding to reduce deformation, adopting the accelerator RT in the flaw detection chamber, dismantling all the tools after all the circular seams are qualified, locally correcting the circular seams to be qualified, and then sending the circular seams to a field for assembly, thereby effectively controlling deformation when assembling the assembly, and avoiding the deformation generated when welding the large connecting pipe from influencing other parts;
d. constructing a reinforcing section; the section is independently established according to the reinforcement section height on the scene, establishes the fixed circularity of riser frock according to equipment diameter, and the adjustment levelness is assembled and welded the longitudinal circular seam with 50mm barrel on the frock, and the rice word props guarantee the circularity in the middle of the direction of height and upper port installation, leaves the good opening size of reinforcing plate position control. Embedding the reinforcing section, and then carrying out local correction according to the actual situation to achieve the assembling longitudinal joint in the unstressed state. The longitudinal seam is 5640mm long, and double-sided synchronous and segmented welding is adopted during welding, so that deformation is reduced. The thickness of the 2 longitudinal seam 80mm plates is reduced to 50mm, and an X-ray machine can be used for RT on site.
In the related technology, the reinforcing section of the large connecting pipe of the dehydrogenation reactor has the defects of high difficulty in drilling, difficulty in ensuring the drilling quality, large assembly clearance and high assembly difficulty in the conventional manufacturing process; the all-position welding has low work efficiency and high skill requirement, and is easy to deform, so that the whole section of the cylinder body is irregularly deformed; the middle plate is wasted after a half length of material is perforated, and the cost of imported stainless steel is high; an outdoor 80mm butt weld and a butt weld of a large connecting pipe and a cylinder lack an RT flaw detection method; the middle block 80mm plate and the 50mm plate have 4 corners which are difficult to thin.
Compared with the prior art, the method has the advantages that one circular seam can be reduced by the brand new barrel typesetting through the long straight seam circular seam dislocation method, the welding workload is reduced, meanwhile, the longitudinal welding seams are staggered, the phenomenon that more internal stress is accumulated at the welding seams is avoided, the deformation of the welding seams is reduced, and meanwhile, the long straight seam typesetting conforms to the pressure container standard. In the aspect of quality, double-sided welding is adopted, so that the welding seam can be ensured to be welded thoroughly, the welding quality of the welding seam is improved, and the risk of bubbles in the welding seam is reduced.
The method of the embodiment also has the advantages of saving plates at the open hole, and achieving cost reduction and efficiency improvement.
1. One circular seam of a 50mm plate is reduced, the length of the 80mm plate is 5200mm, the actual length is 18519mm, the mechanical edge planing cost is 259 yuan/m, the mechanical groove machining cost of an upper shell ring and a lower shell ring is saved by 0.94 yuan, the welding material is saved by 185Kg, the cost is 1.48 yuan, the labor cost of a welder is 0.5 yuan, and the detection cost is 0.5 yuan; the two reinforcing sections are 6.84 ten thousand yuan.
2. The reinforcing section saves 3800X 1880X 80mm of inlet 304H plates, 4.45 tons, and totally 17.36 ten thousand yuan counted by 3.9 ten thousand/ton, and the total of the two reinforcing sections is 34.72 ten thousand yuan.
3. The hole forming matching and assembling of the pipe connection is carried out on site, 2 pipe connections of a 40-ton crane are assembled for 4 shifts, the hole forming effect is improved by 3 times, the welding flat welding effect of the large pipe connection and the cylinder body is improved by 5 times compared with the full-position welding effect, welding materials and repairing and shooting pictures are saved, and the cost of two large pipe connections is saved by about 5 ten thousand yuan.
The three items are saved by 46.56 ten thousand yuan in total.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. A construction method for a large connecting pipe reinforcing section of a second dehydrogenation reactor of a styrene device is characterized by comprising the following steps: comprises the following steps;
adjusting the typesetting; the whole size of the reinforcing section is 5200 multiplied by 5640mm, the height is 3 sections, and the sections are longitudinally and horizontally laid;
installing a moon-shaped plate; two moon-shaped plates are respectively added on the upper reinforcing plate and the lower reinforcing plate, namely the length is 7100 mm;
welding and assembling the cylinder body; manufacturing a 4-horizontal 4-vertical tool according to the shape of a cylinder in a workshop, assembling a moon-shaped plate and an upper reinforcing plate and a lower reinforcing plate on the tool, fixing, standing up, and welding a connecting joint;
constructing a reinforcing section; and (3) independently setting sections for construction according to the height of the reinforcing section on a construction site, setting a vertical plate tool for fixing roundness according to the diameter of equipment, adjusting levelness, and assembling and welding a 50mm cylinder on the tool to form a longitudinal annular seam.
2. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 1, wherein the construction method comprises the following steps: in the step a, two sections with the same height of 2820mm are taken at two sides of the reinforced end, and the vertical welding seam is opened by utilizing the height error of the circular seam.
3. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 1, wherein the construction method comprises the following steps: in the step c, a double-side synchronous and sectional welding mode is adopted when the circular seam is welded.
4. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 3, wherein the construction method comprises the following steps: and c, after the circular seam welding in the step c is finished, feeding the welded workpiece into a flaw detection chamber for carrying out flaw detection on the welded seam.
5. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 4, wherein the construction method comprises the following steps: and c, after the detection of the welding seam of the workpiece is finished, perforating, mounting a large connecting pipe, welding the joint of the large connecting pipe, and turning over and welding two sides for multiple times in the welding process.
6. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 5, wherein the construction method comprises the following steps: and c, after the welding of the large connecting pipe is finished, flaw detection is carried out on the welding seam, the tool is removed after the welding seam is detected to be qualified, the local part of the workpiece is corrected, and after the welding seam and the shape of the workpiece are detected to be qualified, the workpiece is sent to a construction site by a worker for assembly.
7. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 1, wherein the construction method comprises the following steps: and d, in the step d, when the circular seam is welded by a worker, the middle and the upper port of the cylinder are provided with the support frames to ensure the roundness of the cylinder.
8. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 7, wherein the construction method comprises the following steps: and d, reserving the position of the reinforcing plate and controlling the size of the opening when a worker installs the support frame.
9. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 8, wherein the construction method comprises the following steps: in the step d, a worker embeds the reinforcing section into the opening, and then the barrel and the reinforcing section are locally corrected according to actual conditions, so that the longitudinal joint is assembled in a stress-free state.
10. The construction method of the large connecting pipe reinforcing section of the second dehydrogenation reactor of the styrene device according to claim 9, wherein the construction method comprises the following steps: and d, welding by using a double-sided synchronous and sectional welding mode when welding the longitudinal joint by workers, thinning the longitudinal joint plate by 80mm to 50mm after welding, and carrying out flaw detection on the longitudinal joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111228072.8A CN114055077A (en) | 2021-10-21 | 2021-10-21 | Construction method for large connecting pipe reinforcing section of second dehydrogenation reactor of styrene device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111228072.8A CN114055077A (en) | 2021-10-21 | 2021-10-21 | Construction method for large connecting pipe reinforcing section of second dehydrogenation reactor of styrene device |
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| Publication Number | Publication Date |
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| CN114055077A true CN114055077A (en) | 2022-02-18 |
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| CN202111228072.8A Withdrawn CN114055077A (en) | 2021-10-21 | 2021-10-21 | Construction method for large connecting pipe reinforcing section of second dehydrogenation reactor of styrene device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004306084A (en) * | 2003-04-07 | 2004-11-04 | Nippon Steel Corp | Composite welding method of laser welding and arc welding |
| JP2006030218A (en) * | 2005-10-12 | 2006-02-02 | Sumitomo Metal Ind Ltd | Quality inspection method of welded steel pipe welded section |
| CN201534265U (en) * | 2009-07-24 | 2010-07-28 | 江阴金童石化管件有限公司 | Forged integral embedded type reinforcing branch pipe base |
| CN201618558U (en) * | 2010-03-04 | 2010-11-03 | 上海理工大学 | Large-opening reinforcing structure of thin-wall pressure container |
| CN103128420A (en) * | 2013-02-27 | 2013-06-05 | 陕西化建工程有限责任公司 | Construction technology of embedded reinforcing structure for large-orifice pipe of container |
-
2021
- 2021-10-21 CN CN202111228072.8A patent/CN114055077A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004306084A (en) * | 2003-04-07 | 2004-11-04 | Nippon Steel Corp | Composite welding method of laser welding and arc welding |
| JP2006030218A (en) * | 2005-10-12 | 2006-02-02 | Sumitomo Metal Ind Ltd | Quality inspection method of welded steel pipe welded section |
| CN201534265U (en) * | 2009-07-24 | 2010-07-28 | 江阴金童石化管件有限公司 | Forged integral embedded type reinforcing branch pipe base |
| CN201618558U (en) * | 2010-03-04 | 2010-11-03 | 上海理工大学 | Large-opening reinforcing structure of thin-wall pressure container |
| CN103128420A (en) * | 2013-02-27 | 2013-06-05 | 陕西化建工程有限责任公司 | Construction technology of embedded reinforcing structure for large-orifice pipe of container |
Non-Patent Citations (1)
| Title |
|---|
| 马军伟: "两器大开孔接管嵌入式补强结构设计及施工", 中国优秀硕士论文电子期刊网, pages 029 - 126 * |
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Effective date of registration: 20230419 Address after: 201500 Building 1, No.91, Jinyi Road, Jinshan District, Shanghai Applicant after: SHANGHAI PETROCHEMICAL MACHINE MANUFACTURING CO. Applicant after: SINOPEC NINGBO ENGINEERING Co.,Ltd. Applicant after: SINOPEC NINGBO TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. Applicant after: Sinopec Engineering (Group) Co.,Ltd. Address before: 201500 Building 1, No.91, Jinyi Road, Jinshan District, Shanghai Applicant before: SHANGHAI PETROCHEMICAL MACHINE MANUFACTURING CO. Applicant before: SINOPEC NINGBO ENGINEERING Co.,Ltd. |
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