CN103357697B - Manufacturing technology of longitudinal submerged arc welded pipe - Google Patents
Manufacturing technology of longitudinal submerged arc welded pipe Download PDFInfo
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- CN103357697B CN103357697B CN201310331209.1A CN201310331209A CN103357697B CN 103357697 B CN103357697 B CN 103357697B CN 201310331209 A CN201310331209 A CN 201310331209A CN 103357697 B CN103357697 B CN 103357697B
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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, 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, straight-line joint submerged arc welding tube demand increases, and is widely used in above-mentioned industry.Existing straight-line joint submerged arc welding tube manufacturing process is mainly usually: (1) draws arc-extinguishing plate welding; (2) milling limit; (3) pre-bending; (4) shaping; (5) joint close prewelding; (6) weldering in submerged arc; (7) submerged arc outside weld; (8) nondestructive inspection; (9) repair welding; (10) expanding; (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) outward appearance physical dimension detects; (19) identify.
(1) ~ (7) operation in early stage is pipe production technology, (8) ~ (19) are welded tube finishing process, in the manufacturing process of straight-line joint submerged arc welding tube, pipe production technology comparative maturity, but below existing in follow-up steel-tube finishing technique, many problems need to solve:
One, due to before expanding operation is positioned at pipe end tack, pipe end stress may be produced time expanding and concentrate the expanding crackle caused, at this moment need to increase and eliminate pipe end stress centralized procedure, add operation;
Two, Pipe Cutting and sampling is carried out before pipe end tack, make welded tube length variations 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 adopted in pipe end tack operation is at F.F. pallet 1, cut drive unit 2, cutting mechanism 3, cut clamp system 4, welded tube rollgang 5, the basis of steel pipe turnover transport trolley 6 also must be arranged long distance mobile device (as large pallet of walking) 8 and with the corresponding moving vertically idler 7 arranged of long distance mobile device 8, welded tube rollgang 5 needs to adopt large distance 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 the operation realizing tack is long, affect integral production efficiency,
Three, carry out the water pressure test after first carrying out Pipe Cutting sampling, if the nondestructive inspection carried out after the water pressure test is defective, the journey that needs to backflow re-starts Pipe Cutting, and grinding pipe end weld seam again;
Four, carry out nondestructive inspection after advanced line pipe end chamfered edge, if nondestructive inspection is defective, need backflow journey and re-start chamfered edge;
Five, pipe end set round carries out after pipe end chamfered edge, if 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 after pipe end chamfered edge, there is the defective journey excision that needs to backflow 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 efficiency 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: provide a kind of straight-line joint submerged arc welding tube manufacturing process that can improve Welded tube production efficiency and the quality of production.
Straight-line joint submerged arc welding tube manufacturing process of the present invention, comprises the following steps:
(1) pipe is produced:
Draw weldering → submerged arc outside weld in arc-extinguishing plate welding → milling limit → pre-bending → shaping → joint close prewelding → submerged arc, obtain pipe;
(2) pipe finishing:
1. pipe defect preliminary investigation: nondestructive inspection is carried out to pipe, carry out repair welding to the pipe of existing defects, the pipe after repair welding carries out nondestructive inspection again, until zero defect;
2. pipe end tack: through the pipe that preliminary investigation is qualified, carry out pipe end tack by pipe end chamfering machine;
3. expanding: by expanding machine, shaping to be carried out to pipe, ensure that pipe 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. outward appearance physical dimension detects;
mark.
In this straight-line joint submerged arc welding tube manufacturing process, by flat head chamfering operation from adjust between the expanding and water pressure test expanding before, expanding after namely first tack being carried out to pipe end, avoid pipe end stress and concentrate, before pipe end tack and the water pressure test are arranged on Pipe Cutting and sampling operation, can avoid in former operation because nondestructiving inspecting test finds the defective journey of backflowing needing Pipe Cutting to cause of pipe end, by pipe end weld seam grinding process, after expanding, after adjusting to the nondestructive inspection after expanding and the water pressure test before the water pressure test, before the reconditioning of pipe end set round and pipe end chamfered edge, because float conditions after the grinding of pipe end weld seam and pipe end set round improves, pipe end chamfered edge quality will be improved, and due to pipe end defect do not allow repair, namely pipe end finds that defect must be excised, after avoiding the water pressure test, the defective weld seam grinding that causes of pipe end nondestructive inspection and pipe end chamfered edge backflow journey, and the weld seam grinding carried out before and pipe end chamfered edge also need to re-start, thus improve pipe end chamfered edge quality and production efficiency, reduce production cost, by pipe end chamfered edge by before nondestructive inspection after the water pressure test, after adjusting to the nondestructive inspection after the water pressure test, the grinding of pipe end weld seam and set round reconditioning, improvement purpose and effect the same, thus avoid reflux journey, before pipe end set round operation is moved forward to pipe end chamfered edge after the detection of pipe outward appearance physical dimension, chamfering machine float conditions can be improved, after pipe end ovality reaches design standard, carry out pipe end chamfered edge, improve the welded pipe end chamfered edge quality of pipe end ellipse.
The pipe end chamfering machine adopted in the pipe end tack operation of above-mentioned pipe finishing comprises F.F. pallet, cutting mechanism, cutting clamp system, welded tube rollgang and steel pipe turnover transport trolley, steel pipe turnover transport trolley is placed on welded tube rollgang, cut that clamp system is corresponding with cutting mechanism arranges, cutting mechanism connects cutting drive unit, cuts drive unit and is arranged on F.F. pallet.
Because 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, soldering test sample length is 1.0m, after expanding and tube end maching, welded tube length reduces 50mm, so, welded tube is 11.15m at the shortest length of flat head chamfering, maximum length is 12.55m, therefore in pipe end tack operation without the need to adopt long distance mobile device and with the corresponding moving vertically idler arranged of long distance mobile device, by improving the structure of pipe end chamfering machine, both simplified the structure, reduce equipment investment, again reduce equipment failure rate, thus can effectively enhance productivity, reduce production cost.Except above-mentioned points, the length of welded tube rollgang also can correspondingly reduce, after welded tube rollgang centering, welded tube is directly sent into and is cut in clamp system by steel pipe turnover transport trolley, welded tube length according to detecting when rollgang centering controls headstock position in advance, length reduces 1.47 meters, thus decreases floor space.
The beneficial effect that the present invention is compared with prior art had is:
In this straight-line joint submerged arc welding tube manufacturing process, pipe end tack operation from adjust between the expanding and water pressure test expanding before, avoid pipe end stress and concentrate; Before pipe end tack and the water pressure test are arranged on Pipe Cutting and sampling operation, can avoid in former operation because nondestructiving inspecting test finds the defective journey of backflowing needing Pipe Cutting to cause of pipe end; Before pipe end weld seam grinding process is positioned at the reconditioning of pipe end set round and pipe end chamfered edge, after can avoiding the water pressure test, the defective weld seam grinding that causes of pipe end nondestructive inspection and pipe end chamfered edge backflow journey, thus improve pipe end chamfered edge quality and production efficiency, reduce production cost; Advanced line pipe end set round, pipe end ovality carries out pipe end chamfered edge after reaching design standard again, can ensure the crudy of welded pipe end; By improving the structure of pipe end chamfering machine, both simplifying the structure, reducing equipment investment, again reducing equipment failure rate, thus can effectively enhance productivity, reduced production cost.
Accompanying drawing explanation
Fig. 1 is the structural representation of pipe end chamfering machine;
Fig. 2 is the structural representation of former pipe end chamfering machine.
In figure: 1, F.F. pallet; 2, drive unit is cut; 3, cutting mechanism; 4, clamp system is cut; 5, welded tube rollgang; 6, steel pipe turnover transport trolley; 7, moving vertically idler; 8, long distance mobile device.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described further:
This straight-line joint submerged arc welding tube manufacturing process, comprises the following steps:
(1) pipe is produced:
Draw weldering → submerged arc outside weld in arc-extinguishing plate welding → milling limit → pre-bending → shaping → joint close prewelding → submerged arc, obtain pipe;
(2) pipe finishing: the pipe defect preliminary investigation → pipe end tack → expanding → 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 detect → mark.
Straight-line joint submerged arc welding tube pipe must carry out pipe finishing after producing, first nondestructive inspection is carried out to pipe, if existing defects needs to carry out repair welding in pipe, pipe after repair welding carries out nondestructive inspection again, until zero defect, through the pipe that preliminary investigation is qualified, pipe end tack is carried out by pipe end chamfering machine, by expanding machine, shaping is carried out to pipe afterwards, ensure that pipe total length section diameter is consistent, then by water test unit, the water pressure test is carried out to pipe, then nondestructive inspection detection is carried out, carry out Pipe Cutting sampling in turn afterwards, the grinding of pipe end weld seam, set round reconditioning, pipe end chamfered edge, finally detect outward appearance physical dimension, qualified rear Welded Pipe identifies, obtain 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, by flat head chamfering operation from adjust between the expanding and water pressure test expanding before, expanding after namely first tack being carried out to pipe end, avoid pipe end stress and concentrate;
(2), before pipe end tack and the water pressure test are arranged on Pipe Cutting and sampling operation, can avoid in former operation because nondestructiving inspecting test finds the defective journey of backflowing needing Pipe Cutting to cause of pipe end, by pipe end weld seam grinding process, after expanding, after adjusting to the nondestructive inspection after expanding and the water pressure test before the water pressure test, before the reconditioning of pipe end set round and pipe end chamfered edge, because float conditions after the grinding of pipe end weld seam and pipe end set round improves, pipe end chamfered edge quality will be improved, and due to pipe end defect do not allow repair, namely pipe end finds that defect must be excised, after avoiding the water pressure test, the defective weld seam grinding that causes of pipe end nondestructive inspection and pipe end chamfered edge backflow journey, and the weld seam grinding carried out before and pipe end chamfered edge also need to re-start, thus improve pipe end chamfered edge quality and production efficiency, reduce production cost,
(3) by pipe end chamfered edge by before nondestructive inspection after the water pressure test, after adjusting to the nondestructive inspection after the water pressure test, the grinding of pipe end weld seam and set round reconditioning, improvement purpose and effect with (2), thus avoid reflux journey;
(4) before pipe end set round operation being moved forward to pipe end chamfered edge after the detection of pipe outward appearance physical dimension, chamfering machine float conditions can be improved, after pipe end ovality reaches design standard, carry out pipe end chamfered edge, improve the pipe pipe end chamfered edge quality of pipe end ellipse.
The pipe end chamfering machine structure adopted in the pipe end tack operation of this pipe finishing as shown in Figure 1, comprise F.F. pallet 1, cutting mechanism 3, cut clamp system 3, welded tube rollgang 5 and steel pipe turnover transport trolley 6, steel pipe turnover transport trolley 6 is placed on welded tube rollgang 5, cut that clamp system 4 is corresponding with cutting mechanism 3 arranges, cutting mechanism 3 connects cutting drive unit 2, cuts drive unit 2 and is arranged on F.F. pallet 1.
Because 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, soldering test sample length is 1.0m, after expanding and tube end maching, welded tube length reduces 50mm, so, welded tube is 11.15m at the shortest length of flat head chamfering, maximum length is 12.55m, therefore in pipe end tack operation without the need to adopt long distance mobile device 8 in former pipe end chamfering machine (as shown in Figure 2) and with the corresponding moving vertically idler 7 arranged of long distance mobile device 8, by improving the structure of pipe end chamfering machine, both simplified the structure, reduce equipment investment, again reduce equipment failure rate, thus can effectively enhance productivity, reduce production cost.Except above-mentioned points, the length of welded tube rollgang 5 also can correspondingly reduce, after welded tube rollgang 5 centering, welded tube is directly sent into and is cut in clamp system 4 by steel pipe turnover transport trolley 6, welded tube length according to detecting when rollgang centering controls headstock position in advance, length reduces 1.47 meters, thus decreases floor space.
Claims (2)
1. a straight-line joint submerged arc welding tube manufacturing process, is characterized in that: comprise the following steps:
(1) pipe is produced:
Draw weldering → submerged arc outside weld in arc-extinguishing plate welding → milling limit → pre-bending → shaping → joint close prewelding → submerged arc, obtain pipe;
(2) pipe finishing:
1. pipe defect preliminary investigation: nondestructive inspection is carried out to pipe, carry out repair welding to the pipe of existing defects, the pipe after repair welding carries out nondestructive inspection again, until zero defect;
2. pipe end tack: through the pipe that preliminary investigation is qualified, carry out pipe end tack by pipe end chamfering machine;
3. expanding: by expanding machine, shaping to be carried out to pipe, ensure that pipe 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. outward appearance physical dimension detects;
mark.
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), cut clamp system (4), welded tube rollgang (5) and steel pipe turnover transport trolley (6), steel pipe turnover transport trolley (6) is placed on welded tube rollgang (5), cutting clamp system (4) is corresponding with cutting mechanism (3) to be arranged, cutting mechanism (3) connects cutting drive unit (2), cut drive unit (2) to be arranged on 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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| 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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| CN103357697A CN103357697A (en) | 2013-10-23 |
| CN103357697B true CN103357697B (en) | 2015-07-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2605486C2 (en) * | 1976-02-12 | 1982-11-11 | Kocks Technik Gmbh & Co, 4010 Hilden | Process for the production of longitudinally welded pipes |
| JP2905157B2 (en) * | 1996-11-22 | 1999-06-14 | 日本金属工業株式会社 | Inspection method of high frequency welded steel pipe and its manufacturing apparatus |
| US20020153355A1 (en) * | 2001-04-24 | 2002-10-24 | Takashi Kazama | Welded tube internal surface bead cutting apparatus, chip processing method and apparatus, and weld spatter processing apparatus |
| CN201231319Y (en) * | 2008-07-02 | 2009-05-06 | 中冶辽宁德龙钢管有限公司 | Short tube trolley of tack machine |
| CN102294380A (en) * | 2010-06-25 | 2011-12-28 | 上海月月潮钢管制造有限公司 | Method for manufacturing medium-temperature and high-pressure steel pipe |
| CN102172814B (en) * | 2011-01-10 | 2012-10-10 | 崔建立 | Method for manufacturing longitudinal submerged arc welded pipe |
| CN103084427B (en) * | 2012-07-09 | 2014-08-13 | 上海月月潮钢管制造有限公司 | Manufacturing method of hardenability steel tube |
| CN102989842B (en) * | 2012-12-10 | 2015-11-18 | 天水锻压机床(集团)有限公司 | Pipe end rounding machine |
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