CN201487408U - Spiral submerged arc welded pipe capable of being bent by way of induction heating - Google Patents
Spiral submerged arc welded pipe capable of being bent by way of induction heating Download PDFInfo
- Publication number
- CN201487408U CN201487408U CN2009201730434U CN200920173043U CN201487408U CN 201487408 U CN201487408 U CN 201487408U CN 2009201730434 U CN2009201730434 U CN 2009201730434U CN 200920173043 U CN200920173043 U CN 200920173043U CN 201487408 U CN201487408 U CN 201487408U
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- pipe
- submerged arc
- induction heating
- arc welded
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- 230000006698 induction Effects 0.000 title claims abstract description 29
- 238000010438 heat treatment Methods 0.000 title claims abstract description 28
- 230000002787 reinforcement Effects 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims description 29
- 238000010276 construction Methods 0.000 abstract description 6
- 239000003208 petroleum Substances 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003371 toe Anatomy 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 210000005239 tubule Anatomy 0.000 description 1
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- Arc Welding In General (AREA)
Abstract
The utility model relates to a spiral submerged arc welded pipe capable of being bent by way of induction heating, which is applied in the technical field of elbows for the construction of petroleum pipelines. The spiral submerged arc welded pipe has the following characteristics that: the spiral submerged arc welded pipe mainly comprises a spiral seam (2) and a pipe wall (3); the outer diameter of the spiral submerged arc welded pipe (1) is between 426mm and 914mm, and the ratio between the thickness and the outer diameter of the pipe wall (3) is between 0.0175 and 0.035; the forming angle (Alpha) of the spiral seam (2) ranges between 30 degrees and 45 degrees; and the outer weld reinforcement of the spiral seam (2) is between 0mm to 1.7mm. The effect is as follows: on the basis of the ordinary spiral submerged arc welded pipe, the four structural elements, i.e. the pipe diameter, the diameter-thickness ratio, the spiral seam-forming angle and the outer weld reinforcement, are further defined. Compared with the ordinary spiral submerged arc welded pipe, the spiral submerged arc welded pipe can be smoothly bent by way of induction heating, and the quality and shape of the elbow can meet use requirements.
Description
Technical field
The utility model relates to the petroleum pipeline construction, and particularly the pipe bending technique field of pipeline construction is a kind of spiral seam submerged-arc welding pipe that induction heating bends that is fit to carry out.
Background technique
Submerged-arc welded (SAW) pipe comprises straight-line joint submerged arc welding tube and spiral seam submerged-arc welding pipe, and its main distinction is the different of weld seam form and length.The straight-line joint submerged arc welding tube weld seam is axially consistent with welded tube, and length equals pipe range; Between spiral seam submerged-arc welding pipe weld seam and welded tube are axial a formed angle α (scope of α is 30～70 °) is arranged, length is pipe range/cos α.Because weld seam is present in all directions of helix seam welded tube, if adopt the helix seam bend pipe to carry out the processing of induction heating syphon, then can make the part weld seam be subjected to tensile stress, part weld seam compression chord, the stressing conditions of weld seam complexity after the bending makes engineers and technicians dare not attempt adopting the mother pipe of spiral seam submerged-arc welding pipe as induction heating syphon easily.
In fact, the force direction that is subjected to of pipeline mainly is a diametric(al) along steel pipe, and axial is stressed less, and spiral weld more can reduce radially stressed of weld seam; In addition, the bending radius of induction heating syphon is big (being generally 6 times caliber), by calculating as can be known, in a pipe diameter length, bend angle is no more than 10 °, if distance between the toes of a weld is 20 millimeters, 500 millimeters of welded tube diameters, then the bend angle in fusion length is about 0.4 °, that is to say, as long as caliber reaches certain size, the amount of deformation of weld seam is just smaller.
The distortion of weld seam is stressed relevant with caliber, and this is one of factor that influences bending quality.In addition, the radius-thickness ratio of spiral seam submerged-arc welding pipe (wall thickness/diameter) can produce certain influence to bending quality, and radius-thickness ratio is too little, in BENDING PROCESS, makes the interior arc weld both sides of bend pipe produce asymmetric distortion easily, influences the bend pipe profile.The factor that helix seam welded tube induction heating is bent process influence mainly is a weld shape then, comprises formed angle and weld reinforcement.Formed angle mainly influences the injection direction of cooling water in the induction heating process, and angle is too big, can produce inhibition to cooling water, causes and returns water, and influence bends the quenching process in the process.Weld reinforcement is too big, adds first to return to the water phenomenon; Second distance is less between weld reinforcement place and the induction coil, easily causes the inhomogeneous of heating-up temperature; Three too big weld strengths that improved of weld reinforcement, in the process of bending, weld seam and mother metal crooking ability do not match.
And along with the continuous progress of production technology, the quality of helix seam welded tube is greatly improved, and has been widely used in the pipe-line engineering.With respect to straight-line joint submerged arc welding tube, the helix seam welded tube is more suitable for the production of different tube diameters specification welded tube.In the improvement project of some old pipelines, need the induction heating syphon of different size at home.For tubule footpath bend pipe, can adopt seamless steel pipe to process, and, then can't choose suitable seamless steel pipe for big caliber bend pipe (426 millimeters～813 millimeters of diameters), and the caliber of domestic ERW (diameter is greater than 813 millimeters) generally bigger than normal.Induction heating syphon is the structural member of extensive use in the pipe-line, finished at home or ongoing pipeline construction engineering in, adopt straight-line joint submerged arc welding tube or seamless steel pipe usually, carry out the induction heating syphon manufacturing.
Sum up above the analysis as can be known, the caliber of spiral seam submerged-arc welding pipe, radius-thickness ratio, spiral weld formed angle and weld reinforcement are to influence the factor that the spiral seam submerged-arc welding pipe induction heating bends process.
The model utility content
The purpose of this utility model is: provide a kind of being fit to carry out the spiral seam submerged-arc welding pipe that induction heating bends, be used for the manufacturing of helix seam induction heating syphon.Limit from welded tube caliber, radius-thickness ratio, appearance of weld angle and weld reinforcement aspect butt welding tubular construction, making in the bend pipe construction adopts this welded tube to manage as mother, can realize smoothly that induction heating bends, avoid the corner bead place defective on profile or the performance to occur, produce qualified helix seam induction heating syphon.
The technical solution adopted in the utility model is: be fit to carry out the spiral seam submerged-arc welding pipe that induction heating bends, mainly form by spiral weld and tube wall, it is characterized in that: the external diameter of spiral seam submerged-arc welding pipe is between 426～914 millimeters, and the thickness of tube wall and the external diameter of tube wall are than between 0.0175～0.035; The scope of the formed angle of spiral weld (α) is between 30～45 °; The outer reinforcement of spiral weld is between 0～1.7 millimeter.The outer reinforcement of spiral weld is the height that spiral weld is higher than the spiral seam submerged-arc welding pipe outer surface.The other technologies of spiral seam submerged-arc welding pipe require to meet the requirement of NBS " industrial gas oil conveying steel pipe " GB/T 9711.1-1997.
The beneficial effects of the utility model: the utility model is fit to carry out the spiral seam submerged-arc welding pipe that induction heating bends, on the basis of common spiral seam submerged-arc welding pipe, caliber, radius-thickness ratio, spiral weld formed angle and four structural elements of outside weld reinforcement have been done further qualification.Compare with common spiral seam submerged-arc welding pipe, the designed spiral seam submerged-arc welding pipe of the utility model can realize smoothly that induction heating bends, and guarantees that the quality of bend pipe and profile are fit to usage requirement.
In the pipe-line engineering, a large amount of employing induction heating syphons.In the improvement project of some old pipelines, need the induction heating syphon of all size size at home, because specification is many, select the helix seam induction heating syphon for use, can solve the problem of purchasing of female pipe, therefore, in the transformation of old pipeline, application prospect of the present utility model is good.In addition, welcome oil and gas pipes domestic recent years and built the peak, this has just further enlarged application prospect of the present invention.
Description of drawings
Fig. 1 is that the utility model is fit to carry out the spiral seam submerged-arc welding pipe structural representation that induction heating bends.
Among the figure, 1. spiral seam submerged-arc welding pipe, 2. spiral weld, 3. tube wall.
Embodiment
Embodiment 1: being fit to carry out the spiral seam submerged-arc welding pipe that induction heating bends with one is example, and the utility model is described in further detail.
Consult Fig. 1.The length that the utility model is fit to carry out the spiral seam submerged-arc welding pipe 1 that induction heating bends is 10 meters, and external diameter is 711 millimeters, and the thickness of tube wall 3 is 14.3 millimeters.The thickness of tube wall 3 is 0.0201 with the external diameter ratio of tube wall 3; The formed angle of spiral weld 2 (α) is 35 °; The outer reinforcement of spiral weld 2 is 1.6 millimeters.
The other technologies of spiral seam submerged-arc welding pipe 1 require to meet the requirement of NBS " industrial gas oil conveying steel pipe " GB/T 9711.1-1997.
Claims (1)
1. one kind is fit to carry out the spiral seam submerged-arc welding pipe that induction heating bends, mainly form by spiral weld (2) and tube wall (3), it is characterized in that: the external diameter of spiral seam submerged-arc welding pipe (1) is between 426～914 millimeters, and the external diameter of the thickness of tube wall (3) and tube wall (3) is than between 0.0175～0.035; The scope of the formed angle (α) of spiral weld (2) is between 30～45 °; The outer reinforcement of spiral weld (2) is between 0～1.7 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201730434U CN201487408U (en) | 2009-09-02 | 2009-09-02 | Spiral submerged arc welded pipe capable of being bent by way of induction heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201730434U CN201487408U (en) | 2009-09-02 | 2009-09-02 | Spiral submerged arc welded pipe capable of being bent by way of induction heating |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201487408U true CN201487408U (en) | 2010-05-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201730434U Expired - Lifetime CN201487408U (en) | 2009-09-02 | 2009-09-02 | Spiral submerged arc welded pipe capable of being bent by way of induction heating |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201487408U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284569A (en) * | 2011-06-15 | 2011-12-21 | 中国石油天然气股份有限公司 | Hot bending process method |
| CN105674564A (en) * | 2016-01-28 | 2016-06-15 | 广东万和电气有限公司 | Spirally-welded water tank liner and manufacture method thereof |
-
2009
- 2009-09-02 CN CN2009201730434U patent/CN201487408U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102284569A (en) * | 2011-06-15 | 2011-12-21 | 中国石油天然气股份有限公司 | Hot bending process method |
| CN102284569B (en) * | 2011-06-15 | 2014-06-04 | 中国石油天然气股份有限公司 | Hot bending process method |
| CN105674564A (en) * | 2016-01-28 | 2016-06-15 | 广东万和电气有限公司 | Spirally-welded water tank liner and manufacture method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |