CN201057316Y - Heavy caliber double-layer submerged arc welding pipe - Google Patents
Heavy caliber double-layer submerged arc welding pipe Download PDFInfo
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- CN201057316Y CN201057316Y CNU2007201497341U CN200720149734U CN201057316Y CN 201057316 Y CN201057316 Y CN 201057316Y CN U2007201497341 U CNU2007201497341 U CN U2007201497341U CN 200720149734 U CN200720149734 U CN 200720149734U CN 201057316 Y CN201057316 Y CN 201057316Y
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Abstract
The utility model relates to a bi-layer submerged arc welded pipe of large caliber, which is applied to petroleum and natural gas piping. The utility model is characterized in that both an inner pipe and an outer pipe adopt straight seam double-sided submerged arc welded steel pipe; the external diameter of the outer pipe is between 700mm to 1400mm; the external diameter of the inner pipe is 2mm to 5mm shorter than the internal diameter of the outer pipe. The thickness of the outer pipe is between 8mm to 25mm and the thickness of the inner pipe is between 8mm to 25mm. The welding seam outer surface of the inner pipe is of the same form with the outer surface of the inner pipe body; the welding seam inner surface of the outer pipe is of the same form with the inner surface of the outer pipe body. The inner pipe welding seam and the outer pipe welding seam form an angle between 45 degrees to 180 degrees with the inner pipe center. The inner pipe, after being inserted into the outer pipe, achieves the expanded connection of the inner pipe and the outer pipe by the mechanical expanding method, and the inner pipe is jointed with the outer pipe closely. The effects of the utility model are that: the thickness of the inner pipe and the outer pipe can be reduced, reducing the technical difficulty for producing inner and outer pipe material and the produced steel plate property and the quality stability is improved. The utility model greatly improves the bearing capability of pipelines, meeting the large flow transportation need of oil and gas industry.
Description
Technical field
The utility model relates to metal tube material technical field, particularly a kind of double-deck submerged-arc welded (SAW) pipe of heavy caliber that is used for oil, natural gas line conveying
Background technique
Pipeline transport is a kind of safe, economic and continual large-scale mode of movement.Pipeline is widely used in the conveying of oil, rock gas.Because people are to the continuous pursuit of economic benefit and Security, the flow and the pressure of line transportation constantly raise, and caliber and wall thickness constantly increase, and steel pipe improves constantly with the grade of steel (strength grade) of pipe line steel material, and the toughness reguirements of material is also more and more higher.Heavy caliber high-pressure oil gas conveying at present is to adopt the low alloy steel of low-carbon (LC) or super low carbon microalloy composition by controlled rolling technology (TMCP) with the pipe line steel material, or the low alloy steel that adopts high niobium composition is produced by high temperature rolling technology (HTP), with high content of technology, difficulty is big.Increase along with thickness, the production technology difficulty increases, the uniformity variation of the tissue of material and performance, product percent of pass and mass stability are difficult to guarantee, China is used to make oil gas at present and carries the thickness of the pipeline steel plate of heavy caliber longitudinal submerged arc welded pipe to be restricted, mass stability is poor, and product percent of pass is low.
Along with containing hydrogen sulfide (H in crude oil and the rock gas
2S) oil-gas field development of composition, the medium of conveying has certain corrosivity to pipeline, requires tube material to have the ability of anti-hydrogen induced cracking (HIC) (HIC) and resisting sulfide stress corrosion cracking (SSCC).Along with the rising of pipeline grade of steel and the increase of wall thickness, piping material hydrogen-induced cracking resistance energy and resisting sulfide stress corrosion cracking performance requirement are improved, the production technology difficulty increases.Only develop the pipeline steel of anti-hydrogen induced cracking (HIC) of X80 grade of steel and sulfide-stress cracking at present abroad, domestic-developed goes out the pipeline steel of anti-hydrogen induced cracking (HIC) of X65 grade of steel and resisting sulfide stress corrosion cracking, and the common present development abroad of pipeline steel is to X120 grade of steel, the domestic X80 grade of steel that only develops into.
The members such as pressurized container that adopt bi-metal composite panel to make are widely applied in multiple enterprise, have obtained good anti-corrosion and anti-hydrogen induced cracking (HIC) effect.Small-bore composite bimetal pipe material is widely applied in industries such as automobile, Aeronautics and Astronautics.In petroleum industry, composite bimetal pipe small-bore, two kinds of unlike materials is existing on probation.The bore of general composite bimetal pipe is less, makes easily, and mainly be that the thickness of interior pipe is thinner.The inner tubal wall of general composite bimetal pipe is thick below 4mm.As Chinese patent, notice of authorization CN1091497C provides a kind of weldable compound bimetal pipe.As notice of authorization CN 1164382C, provide a kind of stainless steel-lined explosion compound device and blast complex method thereof of composite pipe.
At present, about composite bimetal pipe the open source literature report is arranged both at home and abroad, but concentrate on minor diameter (outer tube diameter is below the 200mm) and little wall thickness (inner tubal wall is thick generally below 4mm), outer tube is different with the material of interior pipe.Characteristics such as that inner tube material generally has is anti-corrosion, wear-resisting, drag reduction mostly are stainless steel or non-ferrous metal, and outer tube generally is the carbon steel or low alloy steel of relative low price, mainly is to bear internal pressure, and thickness is bigger.The heavy caliber delivery pipe that is used for oil, natural gas line conveying is meant that the external diameter of steel pipe is more than 700mm.Domestic literature yet there are no outward and relates to heavy caliber, is used for the report of the double-deck submerged arc pipe of oil, the conveying of natural high pressure gas.
Summary of the invention
The purpose of this utility model is: provide a kind of heavy caliber double-deck submerged-arc welded (SAW) pipe, carry the manufacture difficulty of high-pressure large-caliber steel pipe with sheet material in order to reduce oil gas, satisfy oil, the big flow of rock gas, high-pressure delivery and or corrosion proof requirement.The outer tube of the double-deck submerged-arc welded (SAW) pipe of heavy caliber and the thickness same compound of interior pipe are made composite bimetal pipe together, and the composite bimetal pipe bearing capacity doubles, and pipeline transmission capacity doubles.The composite bimetal pipe of pipe and the identical wall thickness of outer tube in producing, the thickness of outer tube can attenuates, and tissue, performance, the uniformity of making tubing improve, and can better improve the Security that pipeline moves.If contain H2S in the oil of carrying, the rock gas, inner tube material is selected the steel of the low-intensity grade of anti-hydrogen induced cracking (HIC) and resisting sulfide stress corrosion cracking for use; Outer tube is selected the material of high strength grade for use, can bring into play the advantage of two kinds of materials, reduces the wall thickness of composite bimetal pipe, guarantees the corrosion resisting property of composite bimetal pipe, improves the weldability energy of composite bimetal pipe.
The technical solution adopted in the utility model is: pipe and outer tube were formed in the double-deck submerged-arc welded (SAW) pipe of heavy caliber comprised, interior pipe and outer tube all adopt straight-seam double-sided submerged-arc welding steel pipe.In the double-deck submerged-arc welded (SAW) pipe of heavy caliber pipe and outer tube be that with general composite bimetal pipe difference the external diameter of outer tube is between 700-1400mm, the external diameter of interior pipe is than the little 2～5mm of internal diameter of outer tube.The thickness of outer tube is between 8-25mm, and the thickness of interior pipe is between 8-25mm.Pipe bears interior pressure simultaneously with outer tube in the double-deck submerged-arc welded (SAW) pipe of this heavy caliber, improves voltage endurance capability.The thickness of interior pipe and outer tube can be the same or different.The outer surface of interior pipe weld seam is identical with interior tube body external surface shape, and the internal surface of outer tube weld seam is identical with outer tube body internal surface shape.The method of i.e. employing polishing is processed into the outer surface of interior pipe weld seam identical with interior tube body external surface shape; The method of employing polishing is processed into the internal surface of outer tube weld seam identical with outer tube body internal surface shape.Interior pipe weld seam and outer tube weld seam arrive the angle of interior pipe and outer tube hub between the 45-180 degree.During making interior pipe is inserted outer tube, adopt the mechanical expanding method to make interior pipe produce plastic deformation, outer tube produces resiliently deformable or the plastic deformation littler than interior pipe, manages and the outer tube expanded joint in reaching, and interior pipe and outer tube fit tightly together.The double-deck submerged-arc welded (SAW) pipe of heavy caliber is to be combined with each other through mechanical expanded joint by two-layer submerged-arc welding steel pipe.
In pipe and the material of outer tube be adopt the TMCP explained hereafter meet API SPEC 5L " line pipe standard " and GB/T9711-1～3 or ISO 3183-1～3 " industrial gas oil conveying steel pipe deliver goods technical specifications pipe line steel ".According to the purposes difference, the strength of materials grade of interior pipe and outer tube can be identical, also can be different.Select the pipeline steel with anti-hydrogen induced cracking (HIC) and/or resisting sulfide stress corrosion cracking for use as interior pipe, outer tube is selected general pipeline steel for use, has so both improved the double-deck submerged-arc welded (SAW) pipe bearing capacity of heavy caliber, can also carry to contain finite concentration H
2The oil of S or rock gas.
The beneficial effects of the utility model: the double-deck submerged-arc welded (SAW) pipe of the utility model heavy caliber, can reduce the thickness of outer tube, the technical difficulty of production outer tube material (steel plate) is reduced, the plate property of production and mass stability improve.The double-deck submerged-arc welded (SAW) pipe of employing heavy caliber can increase substantially the bearing capacity of pipeline, promptly improves the conveying capacity of pipeline, satisfies the big flow volume delivery needs of oil and gas industry.The composite bimetal pipe of prior art, because inner pipe wall is thinner, bearing capacity is low.The double-deck submerged-arc welded (SAW) pipe tough of heavy caliber improves, and the arrest toughness of pipeline improves, and can better guarantee the security of operation of pipeline.
If contain H in the oil of carrying, the rock gas
2S, inner tube material is selected the material with anti-hydrogen induced cracking (HIC) and/or resisting sulfide stress corrosion cracking intensity for use, and outer tube adopts the material of high strength grade, can bring into play the advantage of two kinds of materials, reduce the wall thickness of the double-deck submerged-arc welded (SAW) pipe of heavy caliber, guarantee the corrosion resisting property of the double-deck submerged-arc welded (SAW) pipe of heavy caliber simultaneously.
From the manufacture cost angle analysis, manage the thickness of back outer tube in reducing, reduced the production and the technical difficulty of material, can reduce the cost of material significantly, can also enhance productivity.
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.
Description of drawings
Fig. 1 is the double-deck submerged-arc welded (SAW) pipe vertical section structure of a utility model heavy caliber schematic representation.
Fig. 2 is the double-deck submerged-arc welded (SAW) pipe cross section structure of a utility model heavy caliber schematic representation.
Among the figure, 1. outer tube, 2. in pipe, 3. outer tube weld seam, 4. in the pipe weld seam.
Embodiment
Embodiment 1: consult Fig. 1.The double-deck submerged-arc welded (SAW) pipe of a kind of heavy caliber, interior pipe 2 and outer tube 1 all adopt straight-seam double-sided submerged-arc welding steel pipe, and the external diameter of outer tube 1 is 1016mm, and the external diameter of interior pipe 2 is 973mm, and the external diameter of interior pipe is than the little 3mm of internal diameter of outer tube, and pipe can be inserted in the outer tube smoothly in guaranteeing.The thickness of outer tube 1 is 20mm, and the thickness of interior pipe 2 is 20mm.Mode with polishing is extremely identical with interior pipe 2 body external surface shape with the outer surface polishing of interior pipe weld seam 4, and the internal surface polishing of outer tube weld seam 3 is extremely identical with outer tube 1 body internal surface shape.Consult Fig. 2.Interior pipe weld seam 4 and outer tube weld seam 3 are 120 degree to the angle at interior pipe 2 and outer tube 1 center.Interior pipe 2 is in outer tube 1, there is the gap of average 1.5mm the centre, adopt the mechanical expanding method to make the plastic deformation of interior pipe 2 generations 1%, outer tube 2 produces less relatively plastic deformation, pipe 2 and outer tube 1 expanded joint in reaching, interior pipe 2 fits tightly together with outer tube 1, also plays the purpose that guarantees steel pipe out of roundness geometrical shape and outside dimension deviation simultaneously.The strength of materials grade of interior pipe 2 and outer tube 1 adopts X70 (L485) grade of steel.
Embodiment 2: consult Fig. 2.Embodiment 2 and embodiment's 1 difference are that the external diameter of outer tube 1 is 813mm, and the external diameter of interior pipe is 781mm.The thickness of outer tube 1 is 15mm, and the thickness of interior pipe 2 is 10mm.Interior pipe 2 is selected the pipeline steel of X60 (L415) grade of steel with anti-hydrogen induced cracking (HIC) and/or resisting sulfide stress corrosion cracking for use, and outer tube 1 is selected the pipeline steel of X80 grade of steel for use.Interior pipe weld seam 4 and outer tube weld seam 3 are 90 degree to the angle at interior pipe 2 and outer tube 1 center.Identical with embodiment's 1 making method.
Claims (4)
1. the double-deck submerged-arc welded (SAW) pipe of a heavy caliber, comprise interior pipe (2) and outer tube (1) composition, it is characterized in that interior pipe (2) and outer tube (1) all adopt straight-seam double-sided submerged-arc welding steel pipe, the external diameter of outer tube (1) is between 700-1400mm, the external diameter of interior pipe is than the little 2～5mm of internal diameter of outer tube, the thickness of outer tube (1) is between 8-25mm, the thickness of interior pipe (2) is between 8-25mm, the outer surface of interior pipe weld seam (4) is identical with interior pipe (2) body external surface shape, the internal surface of outer tube weld seam (3) is identical with outer tube (1) body internal surface shape, the angle that interior pipe weld seam (4) and outer tube weld seam (3) arrive interior pipe (2) and outer tube (1) center is between the 45-180 degree, and interior pipe (2) and outer tube (1) expanded joint are together.
2. the double-deck submerged-arc welded (SAW) pipe of heavy caliber according to claim 1, it is characterized in that: interior pipe (2) is identical with the thickness of outer tube (1).
3. the double-deck submerged-arc welded (SAW) pipe of heavy caliber according to claim 1, it is characterized in that: interior pipe (2) is identical with the strength of materials grade of outer tube (1).
4. the double-deck submerged-arc welded (SAW) pipe of heavy caliber according to claim 1, it is characterized in that: interior pipe (2) is selected the pipeline steel with anti-hydrogen induced cracking (HIC) and/or resisting sulfide stress corrosion cracking for use, and outer tube (1) is selected general pipeline steel for use.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201497341U CN201057316Y (en) | 2007-06-20 | 2007-06-20 | Heavy caliber double-layer submerged arc welding pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201497341U CN201057316Y (en) | 2007-06-20 | 2007-06-20 | Heavy caliber double-layer submerged arc welding pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201057316Y true CN201057316Y (en) | 2008-05-07 |
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ID=39426159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201497341U Expired - Lifetime CN201057316Y (en) | 2007-06-20 | 2007-06-20 | Heavy caliber double-layer submerged arc welding pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201057316Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927376A (en) * | 2012-10-26 | 2013-02-13 | 江苏承中和高精度钢管制造有限公司 | Wear-resistant concrete pump pipe |
| CN103350124A (en) * | 2013-06-09 | 2013-10-16 | 宝鸡石油钢管有限责任公司 | Manufacturing method of straight-seam bi-metal composite welded pipe used for delivering petroleum and natural gas |
| CN111530963A (en) * | 2020-04-29 | 2020-08-14 | 成都光明派特贵金属有限公司 | Manufacturing method of glass liquid stirring rod main shaft |
| CN114226733A (en) * | 2021-12-20 | 2022-03-25 | 揭建康 | Steel-copper composite self-lubricating guide sleeve and preparation method thereof |
| CN116654208A (en) * | 2023-05-05 | 2023-08-29 | 广船国际有限公司 | Double-wall round pipe pillar and manufacturing method thereof |
-
2007
- 2007-06-20 CN CNU2007201497341U patent/CN201057316Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102927376A (en) * | 2012-10-26 | 2013-02-13 | 江苏承中和高精度钢管制造有限公司 | Wear-resistant concrete pump pipe |
| CN103350124A (en) * | 2013-06-09 | 2013-10-16 | 宝鸡石油钢管有限责任公司 | Manufacturing method of straight-seam bi-metal composite welded pipe used for delivering petroleum and natural gas |
| CN111530963A (en) * | 2020-04-29 | 2020-08-14 | 成都光明派特贵金属有限公司 | Manufacturing method of glass liquid stirring rod main shaft |
| CN111530963B (en) * | 2020-04-29 | 2021-08-03 | 成都光明派特贵金属有限公司 | Manufacturing method of glass liquid stirring rod main shaft |
| CN114226733A (en) * | 2021-12-20 | 2022-03-25 | 揭建康 | Steel-copper composite self-lubricating guide sleeve and preparation method thereof |
| CN116654208A (en) * | 2023-05-05 | 2023-08-29 | 广船国际有限公司 | Double-wall round pipe pillar and manufacturing 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 |
Granted publication date: 20080507 |
|
| CX01 | Expiry of patent term |