CN100451415C - Double-seam submerged-arc welding pipe with petroleum and natural-gas transfer and its production - Google Patents
Double-seam submerged-arc welding pipe with petroleum and natural-gas transfer and its production Download PDFInfo
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- CN100451415C CN100451415C CNB2007101179911A CN200710117991A CN100451415C CN 100451415 C CN100451415 C CN 100451415C CN B2007101179911 A CNB2007101179911 A CN B2007101179911A CN 200710117991 A CN200710117991 A CN 200710117991A CN 100451415 C CN100451415 C CN 100451415C
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Abstract
Oil and natural gas are delivered by the double-slit sew pipe and method of production. Characteristic is: Adopt two pieces of steel plate whose width as steel pipe the girth 1/2 , make use of two-sided arc weld to put together two pieces of steel plate following lengthways, then take common used method to product steel pipe . Another method is to make two pieces of steel plates carry on C's model respectively. The two C-shaped are weld to a group of O-pipe, after expanding, nondestructive testing, the product is completed. Effect: Reduce the steel pipe's manufacturing difficulty; make use of existing LSAW pipe equipment, use of existing LSAW pipe equipment, produce outside path at 1016 mms above, wall thickness at 21 mm above the high-quality steel pipe.
Description
Technical field
The invention belongs to the metallic material technical field, relate to a kind of large outside diameter pipe road and the production method that oil, natural gas transport are used, particularly a kind of double-seam submerged-arc welding pipe and production method thereof of being used for.
Background technique
The natural gas line such as Sino-Russian, Central Asia that more than 300 hundred million side's throughput rates are arranged every year is selected the steel pipe of much diameters and much thickness for use actually, becomes the topic that present pipelinerpiston is discussed warmly.The difficult problem of restriction natural gas line construction is production major diameter, thick walled steel tube.China produces the wide and thick skelp and the scarce capacity of major-diameter thick-wall steel pipe, and the steel pipe of bigger external diameter, bigger wall thickness can't be produced.
China has built up many big external diameter straight-line joint submerged arc welding tubes (LSAW) production line.But, be used at present make external diameter more than 1016mm to the construction difficult problem of the peaceful interconnection in Ji from transfering natural gas from the west to the east, two wires, capital, Shan, the homemade senior skelp inefficiency of production of wall thickness more than 21mm, thicker skelp can't be produced; In addition, the productivity of steel plate kind that can produce tubulation is low, produces the quality instability in batches, causes cost of production and selling at exorbitant prices, does not satisfy extensive pipe-line construction needs, and tubulations rely on external import with steel plate in a large number.
Adopt the submerged arc welding general straight-line joint submerged arc welding tube of method processing (LSAW) process engineering, comparative maturity.As the patent of notice of authorization CN 1026867C, its method is steel plate longitudinally to be rolled be circle, two opposite edges welding longitudinally.The welded pipe that forms has a longitudinal weld.But, if adopt general straight-line joint submerged arc welding tube (LSAW) process engineering, make external diameter more than 1016mm, the steel pipe of wall thickness more than 21mm, the steel plate width of use is more than 3192mm.The above thick and above wide steel plate of 3192mm of 21mm, the production difficulty is bigger, and China can't satisfy the needs of a large amount of tubulations at present.In addition, adopt existing general straight-line joint submerged arc welding tube (LSAW) technology, utilize existing straight-line joint submerged arc welding tube equipment, manufacture external diameter more than 1016mm, the steel pipe difficulty of wall thickness more than 21mm is very big.
Summary of the invention
The invention provides the production method of the double-seam submerged-arc welding pipe of a kind of oil, natural gas transport, change straight-line joint submerged arc welding tube technology, manufacture external diameter more than 1016mm, the superior in quality steel pipe of wall thickness more than 21mm; And the big external diameter steel pipe of tubulation sheet material manufacturing that adopts width to reduce by half overcomes the problem of homemade generous skelp scarce capacity.Satisfy the needs that China's oil and gas pipes is built, improve oil gas and carry the quality of using pipe, reduce import, improve autonomous ability and level of building oil and gas pipes.
The production method of the double-seam submerged-arc welding pipe of oil of the present invention, natural gas transport has two kinds of technological schemes:
Scheme 1, splice bar double-seam submerged-arc welding pipe production technology:
A, employing width are two block plates of steel pipe girth 1/2, utilize the double-submerged arc method at first to carry out the limit splicing longitudinally of two block plates, make the width of spliced steel plate meet the requirement for preparing steel pipe.
B, routinely UOE (" U " moulding+" O " moulding+hole enlargement) or JCOE (" J " moulding+" C " moulding+" O " moulding+hole enlargement) longitudinal submerged arc welded pipe production technology carried out the steel pipe moulding and made then.
C, steel pipe is carried out cold hole enlargement, make steel pipe reach the circularity geometrical shape and the outside dimension deviation of designing requirement.
D, carry out the weld seam non-destructive inspection at last, as: x-ray inspection, ultrasonic flaw detection or both and use.Finishing the double-seam submerged-arc welding pipe of oil, natural gas transport makes.
A, employing width are two block plates of steel pipe girth 1/2, carry out " C " moulding respectively with press machine and shaping die, make two " C " shape semicanals.
B, two C shape semicanals are organized on mold the location is welded into " O " shape pipe then, carry out the welding of twice weld seam then, welding method is a double-submerged arc.
C, steel pipe is carried out cold hole enlargement, make steel pipe reach the circularity geometrical shape and the outside dimension deviation of designing requirement.
D, carry out the weld seam non-destructive inspection at last, as: x-ray inspection, ultrasonic flaw detection or both and use.Finishing the double-seam submerged-arc welding pipe of oil, natural gas transport makes.
The invention has the beneficial effects as follows: adopt double-seam submerged-arc welding pipe, produce the steel pipe of same diameter, make required steel plate width reduce half, can bring following advantage:
(1) reduces steel plate width, can reduce requirement, reduce the manufacture difficulty of sheet material, reduce the raw-material price of tubulation the steel rolling equipment ability.Improve performance uniformity and stability, improve the quality of products, improve the Security of pipeline.
(2) adopt and to replace the big external diameter steel pipe of Wide and Thick Slab manufacturing with the roll bending (function admirable, price is low) of producing spiral submerged welded pipe at present.
(3) compare with wall scroll vertical masonry joint submerged arc (LSAW) welded tube, double slit submerged arc (DSAW) welded tube only increases a weld seam, adopts modern advanced welding and nondestructive testing technique can guarantee pipe quality.In addition, the whole advantages that have LSAW.Compare with helix seam submerged arc (SSAW) welded tube, for big external diameter, surpass 63 steel pipes of spending as external diameter φ 1016, helix angle, double slit submerged arc weld length is short.The same with wall scroll vertical masonry joint submerged arc, the double-seam submerged-arc welding pipe position while welding is good, welding easily, and weld appearance and inherent quality are good; Can carry out the total length hole enlargement and handle, the dimensional accuracy height, residual stress is little; Can produce the steel pipe that diameter is bigger, wall thickness is thicker, improve the conveying capacity of pipeline.Compare with spiral seam submerged-arc welding pipe, except being subjected to force direction, the double slit submerged arc has absolute predominance.
(4) separate on the tubulation enterprise of China and the steel production enterprise region, tubulation need rely on railway or highway transport with steel plate, and large diameter steel pipe transports width overrun with sheet material, and the transportation difficulty is big, the expense height.Reduce the width of steel plate, can reduce the raw material cost of transportation.
The development of new double-seam submerged-arc welding pipe is from the present present situation of China, with modern advanced welding technique and automated control technology, and advanced quality control methods such as nondestructive inspection guarantee the quality and the safety reliability of double-seam submerged-arc welding pipe weld seam for relying on.From the angle of country and society, exploitation double slit submerged arc steel pipe can reduce big external diameter oil gas steel pipe to external dependence, reduces import volume, and development country, national economy improve production domesticization degree and autonomous ability of building pipeline.
On oil and gas pipes, partly substitute straight-line joint submerged arc welding tube, can force down import price significantly, for country saves a large amount of foreign exchanges with the double slit submerged arc; The double slit submerged arc substitutes the safety reliability that spiral seam submerged-arc welding pipe improves pipeline; Can make more iron and steel enterprise have the ability to produce the tubulation steel plate, form the market of competition, reduce the price of steel pipe, reduce the cost that oil and gas pipes is built.
The double-seam submerged-arc welding pipe of invention has two kinds of production technology schemes, adopt this two kinds of technological schemes, and with modern advanced welding technique and automated control technology, and advanced quality control methods such as non-destructive inspection combine, and produce quality height, cheap double-seam submerged-arc welding pipe.Excellent, the shortcoming of two kinds of schemes have nothing in common with each other.Compare with scheme two, the advantage of scheme one is only to increase the jigsaw operation on single weld seam longitudinal submerged arc welded pipe tubulation operation of routine, and the operation and the equipment of back are not adjusted, transformed.Its shortcoming is to take certain plant area, and splicing welding joint wants many through once distortion in the tubulation process subsequently, and the mechanical property of butt welded seam has infringement.
Compare with UOE (" U " moulding+" O " moulding+hole enlargement) or JCOE (" J " moulding+" C " moulding+" O " moulding+hole enlargement) straight-line joint submerged arc welding tube production technology commonly used, scheme two can be saved the O forming operation one, saves the required great amount of investment of O forming equipment; Compare with scheme one, scheme two advantages are to reduce the area that takies factory building, and splicing welding joint is few through once distortion.
Description of drawings
Fig. 1 is the double-seam submerged-arc welding pipe longitudinal section schematic representation of oil of the present invention, natural gas transport.
Fig. 2 is the schematic cross section of Fig. 1.
Among the figure, 1. steel pipe, 2. weld seam.
Embodiment
Embodiment 1: consult accompanying drawing.To make an external diameter is 1016mm, and wall thickness is an example in the oil of 29mm, the double slit submerged-arc welding steel pipe production method of natural gas transport, further specifies.
Splice bar double-seam submerged-arc welding pipe production technology, main process is as follows:
A, employing width are 1596mm, length is 12000mm, thickness is two of the steel plates of 29mm, every block plate two edge processing bevel for weldings along its length, utilize the double-submerged arc method with two block plates along its length wherein an end matching connect, the width of spliced steel plate being reached make external diameter is the width requirement of 1050mm steel pipe 1, i.e. 3192mm.
B, employing UOE longitudinal submerged arc welded pipe production technology are carried out steel pipe 1 and are made, promptly on press machine, adopt mould to begin at first steel plate to be pressed into " U " shape from the middle part, change to then on another press machine and the shaping die and steel plate to be pressed into " O " shape pipe, to two the longitudinal edge groups of steel plate after " O " shape shaping round tube together to, tack welding, adopt double-submerged arc technology with tack weld 2 welding, form the shape of steel pipe 1.Perhaps adopting JCOE longitudinal submerged arc welded pipe production technology to carry out steel pipe 1 makes, promptly on press machine, adopt mould at first to carry out " J " moulding of steel plate edges at two ends, carry out " C " moulding then, after carrying out " O " moulding at last, to two longitudinal edge groups of the steel plate after " O " moulding together to, tack welding, adopt double-submerged arc technology with tack weld 2 welding, form the shape of steel pipe 1.
C, adopt mechanical cold hole enlargement equipment, the external diameter from the inside of steel pipe with steel pipe enlarges, and makes metal produce 0.5～1.5% cold deformation, thereby makes steel pipe reach the circularity geometrical shape and the outside dimension deviation of designing requirement.
The x-ray inspection of D, butt welded seam 2 and ultrasonic flaw detection guarantee that weld seam excessive defect can not occur.Finishing an external diameter is 1216mm, and wall thickness is made at the oil of 29mm, the double slit submerged-arc welding steel pipe of natural gas transport.
Embodiment 2: consult accompanying drawing.To make an external diameter is 1219mm, and wall thickness is an example in the oil of 32mm, the double slit submerged-arc welding steel pipe production method of natural gas transport, further specifies.
Moulding double-seam submerged-arc welding pipe production technology (being referred to as COE double-seam submerged-arc welding pipe production technology), main process is as follows:
A, employing width are 1915mm, and length is 12000mm, and thickness is two of the steel plates of 32mm, to its longitudinal edge processing bevel for welding, with press machine and shaping die every block plate are pressed into " C " shape, make two " C " shape semicanals.
B, with two C type semicanals on mold longitudinally the bevel for welding group location is welded into " O " shape pipe, carry out the formal welding of twice weld seam 2 then, welding method is a double-submerged arc.
C, adopt mechanical cold hole enlargement equipment, the external diameter from the inside of steel pipe with steel pipe 1 enlarges, and makes metal produce 0.5～1.5% cold deformation, thereby makes steel pipe 1 reach the circularity geometrical shape and the outside dimension deviation of designing requirement.
D, carry out the x-ray inspection and the ultrasonic flaw detection of weld seam 2 at last.Finishing an external diameter is 1219mm, and wall thickness is made at the oil of 32mm, the double slit submerged-arc welding steel pipe 1 of natural gas transport.
The processing bevel for welding of mentioning among the present invention, double-submerged arc method, steel plate are pressed into " O " shape pipe and steel plate is pressed into " C " shape semicanal, and x-ray inspection and the technology of ultrasonic flaw detection be prior art, do not elaborate.
Claims (2)
1, the production method of the double-seam submerged-arc welding pipe of a kind of oil, natural gas transport is characterized in that:
Adopt splice bar double-seam submerged-arc welding pipe production technology, process is as follows:
A, employing width are two block plates of steel pipe girth 1/2, utilize the double-submerged arc method at first to carry out the limit splicing longitudinally of two block plates, make the width of spliced steel plate meet the requirement for preparing steel pipe;
B, routinely UOE longitudinal submerged arc welded pipe production technology is carried out the steel pipe moulding and is made then;
C, steel pipe is carried out cold hole enlargement, make steel pipe reach the circularity geometrical shape and the outside dimension deviation of designing requirement;
D, carry out the weld seam non-destructive inspection at last, finish the double-seam submerged-arc welding pipe of oil, natural gas transport and make.
2, the production method of the double-seam submerged-arc welding pipe of a kind of oil, natural gas transport is characterized in that:
Adopt two semicanal moulding double-seam submerged-arc welding pipe production technologies, process is as follows:
A, employing width are two block plates of steel pipe girth 1/2, carry out " C " moulding respectively with press machine and shaping die, make two " C " shape semicanals;
B, two C shape semicanals are organized on mold the location is welded into " O " shape pipe then, carry out the welding of twice weld seam then, welding method is a double-submerged arc;
C, steel pipe is carried out cold hole enlargement, make steel pipe reach the circularity geometrical shape and the outside dimension deviation of designing requirement;
D, carry out the weld seam non-destructive inspection at last, finish the double-seam submerged-arc welding pipe of oil, natural gas transport and make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101179911A CN100451415C (en) | 2007-06-27 | 2007-06-27 | Double-seam submerged-arc welding pipe with petroleum and natural-gas transfer and its production |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007101179911A CN100451415C (en) | 2007-06-27 | 2007-06-27 | Double-seam submerged-arc welding pipe with petroleum and natural-gas transfer and its production |
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| CN101074749A CN101074749A (en) | 2007-11-21 |
| CN100451415C true CN100451415C (en) | 2009-01-14 |
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| CN101797600B (en) * | 2010-02-23 | 2012-05-23 | 华油钢管有限公司 | Method for manufacturing high-strength X100 steel grade spiral seam submerged arc welded pipe |
| CN102218642B (en) * | 2011-04-29 | 2013-03-20 | 深圳市建筑设计研究总院有限公司 | Manufacturing method of thick wall steel pipe with small radius-thickness ratio used for building structure |
| CN102563222B (en) * | 2012-02-29 | 2014-07-23 | 中联重科股份有限公司 | Concrete delivery pipe and production method thereof |
| CN103968158A (en) * | 2013-02-01 | 2014-08-06 | 韩正 | Design method for wall thickness selection of city natural gas pipelines |
| CN103115216B (en) * | 2013-02-25 | 2015-01-28 | 河北省第二建筑工程有限公司 | Method for repairing non-standard steel pipeline crack under working state |
| CN103331328B (en) * | 2013-05-28 | 2015-05-06 | 中国石油天然气集团公司 | System and method for preparing longitudinal submerged arc welding (LSAW) |
| CN107313846A (en) * | 2017-07-20 | 2017-11-03 | 佛山市维杰汽车部件制造有限公司 | The manufacture method of integrated car blast pipe |
| RU2667194C1 (en) * | 2017-10-12 | 2018-09-17 | Публичное акционерное общество "Челябинский трубопрокатный завод" (ПАО "ЧТПЗ") | Method of manufacturing double-seam pipes of large diameter |
| CN109812411A (en) * | 2019-01-28 | 2019-05-28 | 中国石油天然气集团公司 | A kind of blackage clearing flow dredging apparatus and its assemble method for oil transportation Pump Suction Nozzle |
| CN111604634A (en) * | 2020-05-06 | 2020-09-01 | 天津大学 | Thick-wall pipeline welding construction method |
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