CN103357697A - Manufacturing technology of longitudinal submerged arc welded pipe - Google Patents
Manufacturing technology of longitudinal submerged arc welded pipe Download PDFInfo
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- CN103357697A CN103357697A CN2013103312091A CN201310331209A CN103357697A CN 103357697 A CN103357697 A CN 103357697A CN 2013103312091 A CN2013103312091 A CN 2013103312091A CN 201310331209 A CN201310331209 A CN 201310331209A CN 103357697 A CN103357697 A CN 103357697A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 41
- 238000005516 engineering process Methods 0.000 title abstract description 7
- 238000005520 cutting process Methods 0.000 claims abstract description 45
- 238000003466 welding Methods 0.000 claims abstract description 39
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000007689 inspection Methods 0.000 claims abstract description 27
- 238000005070 sampling Methods 0.000 claims abstract description 12
- 238000005452 bending Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 230000007547 defect Effects 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 230000007246 mechanism Effects 0.000 claims description 22
- 230000002950 deficient Effects 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 230000007306 turnover Effects 0.000 claims description 10
- 230000008439 repair process Effects 0.000 claims description 7
- 238000011835 investigation Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 10
- 230000002706 hydrostatic effect Effects 0.000 abstract 3
- 238000001514 detection method Methods 0.000 abstract 2
- 238000005498 polishing Methods 0.000 abstract 2
- 239000012141 concentrate Substances 0.000 description 4
- 238000007667 floating Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
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Abstract
The invention belongs to the field of longitudinal submerged arc welded pipe production and relates to a manufacturing technology of a longitudinal submerged arc welded pipe. The manufacturing technology comprises the following steps of 1, pipe blank production: arc striking and extinguishing welding of milled edges, pre-bending, molding, joint pre-welding, submerged arc inside welding and submerged arc outside welding, 2, pipe blank finishing: primary detection of pipe blank defects, pipe end flatting, diameter expansion, hydrostatic test, nondestructive inspection, cutting and sampling, pipe end welding line grinding, roundness regulation and polishing, pipe end chamfering, appearance and geometric dimension detection, and identification. According to the manufacturing technology, the pipe end flatting process originally carried out between diameter expansion and hydrostatic test is carried out before diameter expansion so that pipe end stress concentration is avoided; the pipe end flatting process and the hydrostatic test process are carried out before cutting and sampling and the pipe end welding line grinding process is carried out before pipe end roundness regulation and polishing, and pipe end chamfering so that returning processes are avoided and thus production efficiency is improved and a production cost is reduced; and the pipe end flatting machine structure is improved so that a structure is simplified and an equipment investment and an equipment failure rate are reduced.
Description
Technical field
The present invention relates to a kind of straight-line joint submerged arc welding tube manufacturing process, be used for the production of straight-line joint submerged arc welding tube.
Background technology
Along with the high speed development of the industries such as Oil and Natural Gas Transportation Pipeline, electric power, marine drilling and building, the straight-line joint submerged arc welding tube demand increases, and is widely used in the above-mentioned industry.Existing straight-line joint submerged arc welding tube manufacturing process is mainly usually: (1) draws the arc-extinguishing plate welding; (2) mill the limit; (3) pre-bending; (4) moulding; (5) joint close prewelding; (6) weldering in the submerged arc; (7) submerged arc outside weld; (8) nondestructive inspection; (9) repair welding; (10) hole enlargement; (11) Pipe Cutting and sampling; (12) pipe end weld seam grinding; (13) pipe end tack; (14) water pressure test; (15) pipe end chamfered edge; (16) nondestructive inspection; (17) set round reconditioning; (18) the outward appearance physical dimension detects; (19) sign.
(1)～(7) operation in early stage is the pipe production technology, (8)～(19) be the welded tube finishing process, in the manufacturing process of straight-line joint submerged arc welding tube, the pipe production technology is comparative maturity, but many problems need to solve below existing in follow-up steel-tube finishing technique:
One, because the hole enlargement operation is positioned at before the pipe end tack, may produces pipe end stress during hole enlargement and concentrate the hole enlargement crackle that causes, at this moment need to increase and eliminate pipe end stress centralized procedure, increase operation;
Two, before pipe end tack, carry out Pipe Cutting and sampling, so that the welded tube length variations is very large, therefore, for adapting to the length variations of straight-line joint submerged arc welding tube 8～12.5m, the pipe end chamfering machine that adopts in the pipe end tack operation is at F.F. pallet 1, cutting drive unit 2, cutting mechanism 3, cutting clamp mechanism 4, welded tube rollgang 5, also must arrange on the basis of steel pipe turnover transport trolley 6 long distance moving device (such as the large pallet of walking) 8 and with the lifting carrying roller 7 of long distance moving device 8 corresponding settings, welded tube rollgang 5 needs to adopt greatly apart from the welded tube rollgang, specifically as shown in Figure 2, mechanism's relative complex, equipment investment is higher, floor space is relatively large, displacement and the time of pipe end chamfering machine are longer, and the more holding time of operation of realizing tack is long, affects integral production efficient;
Three, carry out first carrying out the water pressure test after the Pipe Cutting sampling, if the nondestructive inspection of carrying out after the water pressure test is defective, the journey of need to backflowing re-starts Pipe Cutting, and grinding pipe end weld seam again;
Four, carry out nondestructive inspection behind the advanced line pipe end chamfered edge, if nondestructive inspection is defective, the journey of need to backflowing also re-starts chamfered edge;
Five, the pipe end set round carries out behind the pipe end chamfered edge, if the pipe end ovality exceeds standard, can affect the crudy of welded pipe end;
Six, carry out before the nondestructive inspection of pipe end weld seam grinding behind the pipe end chamfered edge, have the backflow journey excision of the defective needs of pipe end nondestructive inspection, and grinding pipe end weld seam again.
Therefore, need to be optimized existing straight-line joint submerged arc welding tube finishing line, to improve integral production efficient and the quality of production of welded tube.
Summary of the invention
According to above deficiency of the prior art, the technical problem to be solved in the present invention is: a kind of straight-line joint submerged arc welding tube manufacturing process that can improve welded tube production efficiency and the quality of production is provided.
Straight-line joint submerged arc welding tube manufacturing process of the present invention may further comprise the steps:
(1) pipe production:
Draw the arc-extinguishing plate welding and mill weldering → submerged arc outside weld in limit → pre-bending → moulding → joint close prewelding → submerged arc, obtain pipe;
(2) welded tube finishing:
1. pipe defective preliminary investigation: pipe is carried out nondestructive inspection, the pipe that has defective is carried out repair welding, the pipe after the repair welding carries out nondestructive inspection again, until zero defect;
2. pipe end tack: through the qualified pipe of preliminary investigation, carry out pipe end tack by the pipe end chamfering machine;
3. hole enlargement: by expanding machine straight-line joint submerged arc welding tube is carried out shaping, guarantee that ERW total length section diameter is consistent;
4. the water pressure test:
5. nondestructive inspection;
6. Pipe Cutting and sampling;
7. pipe end weld seam grinding;
8. set round reconditioning;
9. pipe end chamfered edge;
10. the outward appearance physical dimension detects;
In this straight-line joint submerged arc welding tube manufacturing process, the flat head chamfering operation before adjust to hole enlargement between hole enlargement and the water pressure test, is namely carried out hole enlargement behind the tack to pipe end first, avoided pipe end stress to concentrate; Pipe end tack and the water pressure test are arranged on before Pipe Cutting and the sampling operation, can avoid finding the defective journey of backflowing that needs Pipe Cutting to cause of pipe end because of nondestructiving inspecting test in the former operation; With pipe end weld seam grinding process, after hole enlargement, adjust to before the water pressure test after the nondestructive inspection after hole enlargement and the water pressure test, before the reconditioning of pipe end set round and the pipe end chamfered edge, the improvement of terms owing to floating behind the grinding of pipe end weld seam and the pipe end set round, to improve pipe end chamfered edge quality, and because the pipe end defective does not allow repairing, be that pipe end discovery defective must be excised, avoided after the water pressure test the defective weld seam grinding that causes of pipe end nondestructive inspection and the pipe end chamfered edge journey of backflowing, and the weld seam grinding of carrying out before and pipe end chamfered edge also need to re-start, thereby improve pipe end chamfered edge quality and production efficiency, reduce production costs; With the pipe end chamfered edge by the water pressure test after before the nondestructive inspection, adjust to after nondestructive inspection, the grinding of pipe end weld seam and the set round reconditioning after the water pressure test, improvement purpose and effect are the same, thereby avoid anti-flow process; Pipe end set round operation before move forward to the pipe end chamfered edge after welded tube outward appearance physical dimension detects, can be improved the chamfering machine condition of floating, the pipe end ovality reaches design standard after, carry out the pipe end chamfered edge, the welded pipe end chamfered edge quality of raising pipe end ellipse.
The pipe end chamfering machine that adopts in the pipe end tack operation of above-mentioned welded tube finishing comprises F.F. pallet, cutting mechanism, cutting clamp mechanism, welded tube rollgang and steel pipe turnover transport trolley, steel pipe turnover transport trolley places on the welded tube rollgang, the setting corresponding to cutting mechanism of cutting clamp mechanism, cutting mechanism connects the cutting drive unit, and the cutting drive unit is installed on the F.F. pallet.
Because the straight-line joint submerged arc welding tube steel plate length is land 12.2m ± 50mm, seabed 12.5m ± 50mm, steel plate incoming test sample length is 0.5m, the soldering test sample length is 1.0m, welded tube length reduces 50mm behind hole enlargement and the tube end maching, so, welded tube is 11.15m at the shortest length of flat head chamfering, maximum length is 12.55m, thus need not in the pipe end tack operation to adopt long distance moving device and with the lifting carrying roller of the corresponding setting of long distance moving device, by the structure of pipe end chamfering machine is improved, both simplified the structure, reduced equipment investment, reduced again equipment failure rate, thereby can effectively enhance productivity, reduced production costs.Except above-mentioned points, the length of welded tube rollgang also can correspondingly reduce, after welded tube rollgang centering, steel pipe turnover transport trolley is directly sent into welded tube in the cutting clamp mechanism, control in advance the headstock position according to the welded tube length that detects when the rollgang centering, length reduces 1.47 meters, thereby has reduced floor space.
The beneficial effect that the present invention compared with prior art has is:
In this straight-line joint submerged arc welding tube manufacturing process, pipe end tack operation has avoided pipe end stress to concentrate before adjust to hole enlargement between hole enlargement and the water pressure test; Pipe end tack and the water pressure test are arranged on before Pipe Cutting and the sampling operation, can avoid finding the defective journey of backflowing that needs Pipe Cutting to cause of pipe end because of nondestructiving inspecting test in the former operation; Pipe end weld seam grinding process is positioned at before the reconditioning of pipe end set round and the pipe end chamfered edge, can avoid after the water pressure test the defective weld seam grinding that causes of pipe end nondestructive inspection and the pipe end chamfered edge journey of backflowing, thereby improve pipe end chamfered edge quality and production efficiency, reduces production costs; Advanced line pipe end set round, the pipe end ovality is carried out the pipe end chamfered edge after reaching design standard again, can guarantee the crudy of welded pipe end; By the structure of pipe end chamfering machine is improved, both simplified the structure, reduced equipment investment, reduced again equipment failure rate, thereby can effectively enhance productivity, reduce production costs.
Description of drawings
Fig. 1 is the structural representation of pipe end chamfering machine;
Fig. 2 is the structural representation of former pipe end chamfering machine.
Among the figure: 1, F.F. pallet; 2, cutting drive unit; 3, cutting mechanism; 4, cutting clamp mechanism; 5, welded tube rollgang; 6, steel pipe turnover transport trolley; 7, lifting carrying roller; 8, long distance moving device.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described further:
This straight-line joint submerged arc welding tube manufacturing process may further comprise the steps:
(1) pipe production:
Draw the arc-extinguishing plate welding and mill weldering → submerged arc outside weld in limit → pre-bending → moulding → joint close prewelding → submerged arc, obtain pipe;
(2) welded tube finishing: the pipe defective preliminary investigation → pipe end tack → hole enlargement → water pressure test → nondestructive inspection → Pipe Cutting and sampling → pipe end weld seam grinding → set round reconditioning → pipe end chamfered edge → outward appearance physical dimension detects → sign.
Must carry out the welded tube finishing after the production of straight-line joint submerged arc welding tube pipe, at first pipe is carried out nondestructive inspection, need to carry out repair welding if there is defective in the pipe, pipe after the repair welding carries out nondestructive inspection again, until zero defect, through the qualified pipe of preliminary investigation, carry out pipe end tack by the pipe end chamfering machine, by expanding machine straight-line joint submerged arc welding tube is carried out shaping afterwards, guarantee that ERW total length section diameter is consistent, then carry out the water pressure test by the water test unit Welded Pipe, then carry out nondestructive inspection and detect, carry out in turn afterwards the Pipe Cutting sampling, the grinding of pipe end weld seam, the set round reconditioning, the pipe end chamfered edge detects the outward appearance physical dimension at last, qualified rear Welded Pipe identifies, and obtains final products.
This technique is compared traditional handicraft and is had the following advantages:
(1) in this straight-line joint submerged arc welding tube manufacturing process, the flat head chamfering operation before adjust to hole enlargement between hole enlargement and the water pressure test, is namely carried out hole enlargement behind the tack to pipe end first, avoided pipe end stress to concentrate;
(2) pipe end tack and the water pressure test are arranged on before Pipe Cutting and the sampling operation, can avoid finding the defective journey of backflowing that needs Pipe Cutting to cause of pipe end because of nondestructiving inspecting test in the former operation; With pipe end weld seam grinding process, after hole enlargement, adjust to before the water pressure test after the nondestructive inspection after hole enlargement and the water pressure test, before the reconditioning of pipe end set round and the pipe end chamfered edge, the improvement of terms owing to floating behind the grinding of pipe end weld seam and the pipe end set round, to improve pipe end chamfered edge quality, and because the pipe end defective does not allow repairing, be that pipe end discovery defective must be excised, avoided after the water pressure test the defective weld seam grinding that causes of pipe end nondestructive inspection and the pipe end chamfered edge journey of backflowing, and the weld seam grinding of carrying out before and pipe end chamfered edge also need to re-start, thereby improve pipe end chamfered edge quality and production efficiency, reduce production costs;
(3) with the pipe end chamfered edge by the water pressure test after before the nondestructive inspection, adjust to after nondestructive inspection, the grinding of pipe end weld seam and the set round reconditioning after the water pressure test, improvement purpose and effect be with (2), thereby avoid anti-flow process;
(4) with pipe end set round operation before move forward to the pipe end chamfered edge after welded tube outward appearance physical dimension detects, can improve the chamfering machine condition of floating, the pipe end ovality reaches design standard after, carry out the pipe end chamfered edge, the welded pipe end chamfered edge quality of raising pipe end ellipse.
The pipe end chamfering machine structure that adopts in the pipe end tack operation of this welded tube finishing as shown in Figure 1, comprise F.F. pallet 1, cutting mechanism 3, cutting clamp mechanism 3, welded tube rollgang 5 and steel pipe turnover transport trolley 6, steel pipe turnover transport trolley 6 places on the welded tube rollgang 5, cutting clamp mechanism 4 and cutting mechanism 3 corresponding settings, cutting mechanism 3 connects cutting drive unit 2, and cutting drive unit 2 is installed on the F.F. pallet 1.
Because the straight-line joint submerged arc welding tube steel plate length is land 12.2m ± 50mm, seabed 12.5m ± 50mm, steel plate incoming test sample length is 0.5m, the soldering test sample length is 1.0m, welded tube length reduces 50mm behind hole enlargement and the tube end maching, so, welded tube is 11.15m at the shortest length of flat head chamfering, maximum length is 12.55m, therefore need not to adopt in the pipe end tack operation in the former pipe end chamfering machine (as shown in Figure 2) long distance moving device 8 and with the lifting carrying roller 7 of long distance moving device 8 corresponding settings, by the structure of pipe end chamfering machine is improved, both simplified the structure, reduced equipment investment, reduced again equipment failure rate, thereby can effectively enhance productivity, reduced production costs.Except above-mentioned points, the length of welded tube rollgang 5 also can correspondingly reduce, after welded tube rollgang 5 centerings, steel pipe turnover transport trolley 6 is directly sent into welded tube in the cutting clamp mechanism 4, control in advance the headstock position according to the welded tube length that detects when the rollgang centering, length reduces 1.47 meters, thereby has reduced floor space.
Claims (2)
1. straight-line joint submerged arc welding tube manufacturing process is characterized in that: may further comprise the steps:
(1) pipe production:
Draw the arc-extinguishing plate welding and mill weldering → submerged arc outside weld in limit → pre-bending → moulding → joint close prewelding → submerged arc, obtain pipe;
(2) welded tube finishing:
1. pipe defective preliminary investigation: pipe is carried out nondestructive inspection, the pipe that has defective is carried out repair welding, the pipe after the repair welding carries out nondestructive inspection again, until zero defect;
2. pipe end tack: through the qualified pipe of preliminary investigation, carry out pipe end tack by the pipe end chamfering machine;
3. hole enlargement: by expanding machine straight-line joint submerged arc welding tube is carried out shaping, guarantee that ERW total length section diameter is consistent;
4. the water pressure test:
5. nondestructive inspection;
6. Pipe Cutting and sampling;
7. pipe end weld seam grinding;
8. set round reconditioning;
9. pipe end chamfered edge;
10. the outward appearance physical dimension detects;
2. straight-line joint submerged arc welding tube manufacturing process according to claim 1, it is characterized in that: described pipe end chamfering machine comprises F.F. pallet (1), cutting mechanism (3), cutting clamp mechanism (4), welded tube rollgang (5) and steel pipe turnover transport trolley (6), steel pipe turnover transport trolley (6) places on the welded tube rollgang (5), cutting clamp mechanism (4) and the corresponding setting of cutting mechanism (3), cutting mechanism (3) connects cutting drive unit (2), and cutting drive unit (2) is installed on the F.F. pallet (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310331209.1A CN103357697B (en) | 2013-08-01 | 2013-08-01 | Manufacturing technology of longitudinal submerged arc welded pipe |
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| CN201310331209.1A CN103357697B (en) | 2013-08-01 | 2013-08-01 | Manufacturing technology of longitudinal submerged arc welded pipe |
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| CN103357697A true CN103357697A (en) | 2013-10-23 |
| CN103357697B CN103357697B (en) | 2015-07-01 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855319A (en) * | 2016-06-03 | 2016-08-17 | 合肥紫金钢管股份有限公司 | Manufacturing technology of ultra-large-diameter ultralong steel pipe for cross-sea bridge steel casing |
| CN105880952A (en) * | 2016-06-03 | 2016-08-24 | 合肥紫金钢管股份有限公司 | Production process of longitudinal submerged arc welded pipe for oil and gas transmission |
| CN106694610A (en) * | 2017-03-29 | 2017-05-24 | 无锡市蓝博金属制品有限公司 | Preparation process of oil filler pipe |
| CN107891098A (en) * | 2017-12-25 | 2018-04-10 | 江苏双友智能装备科技股份有限公司 | Full-automatic steel pipe pipe end sizing mill |
| CN112077537A (en) * | 2020-09-04 | 2020-12-15 | 江苏武进不锈股份有限公司 | Preparation method of large-caliber stainless steel JCOE welded pipe |
| CN113211093A (en) * | 2021-03-29 | 2021-08-06 | 河北沧海核装备科技股份有限公司 | Milling saw drawing method for longitudinal submerged arc welded pipe forming |
| CN114273538A (en) * | 2021-12-17 | 2022-04-05 | 江苏双友智能装备科技股份有限公司 | Full-length expanding process for spiral steel pipe |
| CN114535939A (en) * | 2022-03-22 | 2022-05-27 | 湖南胜利湘钢钢管有限公司 | Method for manufacturing longitudinal submerged arc welded pipe |
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| US4196838A (en) * | 1976-02-12 | 1980-04-08 | Friedrich Kocks Gmbh & Company | Methods for the manufacture of longitudinal-seam welded tubes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105855319A (en) * | 2016-06-03 | 2016-08-17 | 合肥紫金钢管股份有限公司 | Manufacturing technology of ultra-large-diameter ultralong steel pipe for cross-sea bridge steel casing |
| CN105880952A (en) * | 2016-06-03 | 2016-08-24 | 合肥紫金钢管股份有限公司 | Production process of longitudinal submerged arc welded pipe for oil and gas transmission |
| CN106694610A (en) * | 2017-03-29 | 2017-05-24 | 无锡市蓝博金属制品有限公司 | Preparation process of oil filler pipe |
| CN107891098A (en) * | 2017-12-25 | 2018-04-10 | 江苏双友智能装备科技股份有限公司 | Full-automatic steel pipe pipe end sizing mill |
| CN112077537A (en) * | 2020-09-04 | 2020-12-15 | 江苏武进不锈股份有限公司 | Preparation method of large-caliber stainless steel JCOE welded pipe |
| CN113211093A (en) * | 2021-03-29 | 2021-08-06 | 河北沧海核装备科技股份有限公司 | Milling saw drawing method for longitudinal submerged arc welded pipe forming |
| CN114273538A (en) * | 2021-12-17 | 2022-04-05 | 江苏双友智能装备科技股份有限公司 | Full-length expanding process for spiral steel pipe |
| CN114535939A (en) * | 2022-03-22 | 2022-05-27 | 湖南胜利湘钢钢管有限公司 | Method for manufacturing longitudinal submerged arc welded pipe |
| CN114535939B (en) * | 2022-03-22 | 2023-02-28 | 湖南胜利湘钢钢管有限公司 | Method for manufacturing longitudinal submerged arc welded pipe |
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|---|---|
| CN103357697B (en) | 2015-07-01 |
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