CN203297771U - High-corrosion-resistant copper bearing steel composite spiral welded pipe for oceanographic engineering - Google Patents

High-corrosion-resistant copper bearing steel composite spiral welded pipe for oceanographic engineering Download PDF

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Publication number
CN203297771U
CN203297771U CN201320283529XU CN201320283529U CN203297771U CN 203297771 U CN203297771 U CN 203297771U CN 201320283529X U CN201320283529X U CN 201320283529XU CN 201320283529 U CN201320283529 U CN 201320283529U CN 203297771 U CN203297771 U CN 203297771U
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China
Prior art keywords
steel
layer
inert metal
corrosion
tube
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Expired - Fee Related
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CN201320283529XU
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Chinese (zh)
Inventor
罗慰民
孙巍
陈汉文
陶燃
毛超杰
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ZHEJIANG SIU LUNG ALLOY CO Ltd
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ZHEJIANG SIU LUNG ALLOY CO Ltd
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Publication of CN203297771U publication Critical patent/CN203297771U/en
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Abstract

A high-corrosion-resistant copper bearing steel composite spiral welded pipe for oceanographic engineering comprises a stand column pipe, the outer side of the stand column pipe is covered by a protective layer, the protective layer comprises an inert metal layer and a steel layer, and the inert metal layer is bonded with the steel layer in a metallurgical mode through heat treatment. Inert metal is used as a constituent part of the protective layer and arranged on the surface of the stand column pipe, and molecule diffusion is achieved through the heat treatment, so that the inert metal layer is bonded with the steel layer in the metallurgical mode, and then the steel layer is arranged on the outer side face of the stand column pipe to ensure the bonding strength of the inert metal layer and the steel layer. Therefore, sea water can be prevented from directly making contact with a stand column pipe body, so that corrosion of the steel stand column pipe body is completely avoided. The inert metal is adopted for manufacturing the protective layer, the inert metal can avoid sea corrosion, moreover, the surface of the inert metal is smooth, and the inert metal further can effectively reduce adhesion of microbes.

Description

The high anti-corrosion copper steel composite screw welded tube of a kind of ocean engineering
Technical field
The utility model relates to the high anti-corrosion copper steel composite screw welded tube of a kind of ocean engineering.
Background technique
The offshore drilling platform column adopts steel material to make usually, because the anti-marine organism corrsion ability of steel pipe is poor, seeking a kind of protection steel column always, can play the surface protecting material of anti-marine organism corrsion ability, namely do not affect the use function of column itself, can refuse the marine organisms adhesive ability again;
The jacket column of offshore drilling platform adopts the steel pipe material to make usually, but, because Fe is more active, in the impingment corrosion situation of seawater, easily produces marine organisms and adhere to, and makes the steel column substantially not possess the ability of anti-marine organism corrsion.
Brainstrust tries hard to adopt electroplating surface or the spraying copper at steel tubing, reaches the ability of the anti-marine organism corrsion in column surface, but can't realize because technique is immature.
The model utility content
The utility model technical issues that need to address are to provide the high anti-corrosion copper steel composite screw welded tube of a kind of ocean engineering, in order to address the above problem.
In the utility model, the high anti-corrosion copper steel composite screw welded tube of ocean engineering, comprise column tube, the described column tube outside is coated with protective coating, described protective coating comprises inert metal layer and steel layer, described protective coating is arranged on the outer side surface of described steel layer, and described inert metal layer is by heat treatment and described steel layer metallurgy combination.
Preferably, described column tube comprises tube wall, on described tube wall outer side surface, is coated with described protective coating, and described protective coating forms the compound base material of copper steel by metallurgy combination, described base material spiral is arranged to tubular structure, and the contacted side of described base material is welded to connect and forms weld seam.
Preferably, described protective coating is the copper steel composite armor.
Preferably, on the outer side surface of described protective coating, be provided with the copper powder layer, described copper powder layer is covered on described weld seam.
In the said structure design, the high anti-corrosion copper steel composite screw welded tube of ocean engineering includes column tube, and the column tube outside is coated with protective coating, and protective coating includes inert metal layer and steel layer, and the inert metal layer is by heat treatment and steel layer metallurgy combination.Use the constituent element of inert metal as protective coating, it is arranged at the surface of column tube, and reach molecular diffusion by heat treatment, make steel layer and inert metal layer metallurgy combination be in the same place, again the steel layer is arranged on the outer side surface of column tube, guarantee adhesive strength between the two, so setting can avoid seawater directly to contact with the column tube main body, thereby has avoided the corrosion condition of steel column tube main body to occur fully.Adopt inert metal to be made into protective coating, inert metal can avoid being subject to the corrosion of seawater, and its smooth surface, can also effectively reduce adhering to of microorganism.
The accompanying drawing explanation
Fig. 1 is the structural representation of the high anti-corrosion copper steel composite screw welded tube of ocean engineering in a kind of embodiment of the utility model;
Fig. 2 is the structural representation of the high anti-corrosion copper steel composite screw welded tube of the utility model ocean engineering;
Wherein: spraying copper layer 1, weld seam 2, copper layer 3, steel layer 4.
Embodiment
Below in conjunction with accompanying drawing, model utility is described in further detail:
As depicted in figs. 1 and 2, the utility model provides ocean engineering high anti-corrosion copper steel composite screw welded tube, includes the column tube main body of steel, and the column tube main body is arranged in seawater and stretches out the water surface, be used to supporting drill platform.Owing in seawater, containing metal ion, easily cause the corrosion of column tube main body.And, in seawater, also have many microorganisms, easily be attached to the surface of column tube main body, the corrosion of aggravation column tube main body.
In order to solve the problems of the technologies described above, the high anti-corrosion copper steel composite screw welded tube of the ocean engineering that the utility model provides has adopted following structure: the high anti-corrosion copper steel composite screw welded tube of ocean engineering includes the column tube of steel, and the column tube outside is coated with protective coating.Described protective coating comprises inert metal layer and steel layer, and protective coating is arranged at the outer surface of column tube, and the inert metal layer is by heat treatment and steel layer metallurgy combination.Use the constouctional material of inert metal as protective coating, it is arranged at the surface of column tube, and reach molecular diffusion by heat treatment, make steel layer and inert metal layer metallurgy combination be in the same place, again the steel layer is arranged on the outer side surface of column tube, guarantee adhesive strength between the two, so setting can avoid seawater directly to contact with the column tube main body, thereby has avoided the corrosion condition of steel column tube main body to occur fully.Adopt inert metal to be made into protective coating, inert metal can avoid being subject to the corrosion of seawater, and its smooth surface, can also effectively reduce adhering to of microorganism.
Through inventor's test of many times, in order to play protective action by the column tube body, its manufacture cost is lower simultaneously, and in the present embodiment, protective coating is the copper steel composite armor.
In the utility model embodiment, the integral body of the high anti-corrosion copper steel composite screw welded tube of ocean engineering constitutes: column tube comprises tube wall, on the tube wall outer side surface, be coated with protective coating, protective coating forms the compound base material of copper steel by metallurgy combination, the base material spiral is arranged to tubular structure, and the contacted side of base material is welded to connect and forms weld seam.The concrete forming step of said structure is: at first, steel layer and copper layer are cut into to strip, steel layer and copper layer form base material by the heat treatment metallurgy combination; Then, by helical buckling, become cylindrical shape; After this, by high-frequency welding manner, the face portion melting is touched in two sides of base material and produce weld seam, reach the surface of contact metallurgy combination; Finally, at face of weld spraying copper powder, play weld seam steel layer and the corrosion-resistant effect of covering.
An embodiment of the present utility model, the high anti-corrosion copper steel composite screw welded tube of ocean engineering comprise face of weld spraying copper layer 1, weld seam 2, copper layer 3, steel layer 4; Material (comprising copper layer 3, steel layer 4) sub-cut into strips, is become to cylindrical shape by helical buckling, by high-frequency welding manner, the face portion melting is touched in two sides of band and produce weld seam 2, reach the surface of contact metallurgy combination; Then at face of weld spraying copper powder, play weld seam steel layer and the corrosion-resistant effect of covering.
In above-mentioned processing, also comprise the step of the weld seam that solidifies being carried out to smooth processing, then just copper powder layer 1 is sprayed on to the high temperature place melting of high frequency weld seam.
The continuous helical buckling of copper steel composite strip → weld seam adjustment → high frequency welding → weld seam processing → weld seam spraying → surface treatment → operations such as online detection → interruption, finally make spiral welded tubing.
With the steel column, compare, the utility model arranges spiral helicine copper strips on steel column, has solved at steel column tube electroplating surface or spraying copper, because of the immature technical barrier that can't realize the surface protection of steel column of technique.
Improvement emphasis of the present utility model also is: the base material spiral is arranged to tubular structure, then by welding, realizes connecting.
Below the technical feature of spiral welded pipe and ERW is compared:
1, the cracking resistance of spiral welded pipe is better than steel pipes with straight
ERW inevitably has a lot of tee welding youngsters and causes welding residual stress, and weld metal often is in three-dimensional stress state, has increased the possibility that cracks.Because the roll bending rolling direction of spiral welded pipe is not vertical steel tube axial direction (its folder solution depends on the helix angle of steel pipe), and the steel plate rolling direction of steel pipes with straight is perpendicular to the steel pipe axial direction, thereby the cracking resistance of spiral welded pipe material is better than steel pipes with straight.
2, the spiral welded pipe strength ratio ERW of same wall thickness is high
Pipe, when bearing interior pressure, produces two kinds of main stress, i.e. radial stress δ Y and axial stress δ X usually on tube wall.The weld joint combined stress is: δ=δ Y (1/4sin2 α+cos2 α) 1/2.Wherein, α is the helix angle of spiral welded pipe weld seam.
The helix angle of spiral welded pipe weld seam is generally the 50-75 degree, so spiral weld place combined stress is the 60-85% of ERW principal stress.Under identical working pressure, the spiral welded pipe of same caliber can reduce than ERW wall thickness.
3, spiral welded pipe has higher toughness and fatigue strength
The trend of pipeline development is heavy caliber, high strength.Along with the increasing of diameter of steel tube, the raising of grade of steel used, the trend that produces the steady expansion of ductile fracture point is larger.According to the test of the relevant research institution of the U.S., show, although spiral welded pipe and ERW are all a rank, spiral welded pipe has higher impact toughness.
4, spiral welded pipe has on-the-spot weldability
The production of spiral welded pipe is stable continuous process under the same operating condition basically: and the ERW production process is segmentation, comprises whole plate/pressure head/pre-volume/spot welding/reciprocity multiple working procedure process of welding/finishing/group.This is that spiral welded pipe production is different from the key character that ERW is produced.
Stable production status is convenient to the control of welding quality and the assurance of physical dimension very much.Because the spiral welded pipe cast is regular, even weld distributes, with respect to ERW, Spiral Steel Pipe has superior mouth of pipe ovality and end face squareness, guaranteed on-the-spot steel-pipe welding group to the time assembling precision.
General spiral welded pipe unit all adopts the on-line continuous check system to guarantee the welding quality of weld seam, and this is that spiral welded pipe production is different from another key character that ERW is produced.Check is conducive to the monitoring of weld defects, the assurance of stablizing, welding grade of welding quality continuously.
Due to the restriction of production technology, ERW extremely difficult the realization is uninterruptedly checked continuously.This appearance probability that will make to weld hidden danger and quality problems increases, even the overall work reliability of impact pipeline performance in future.

Claims (4)

1. the high anti-corrosion copper steel composite screw welded tube of ocean engineering, comprise column tube, it is characterized in that,
The described column tube outside is coated with protective coating, and described protective coating comprises inert metal layer and steel layer, and described protective coating is arranged on the outer side surface of described steel layer, and described inert metal layer is by heat treatment and described steel layer metallurgy combination.
2. the high anti-corrosion copper steel composite screw welded tube of ocean engineering according to claim 1, it is characterized in that, described column tube comprises tube wall, on described tube wall outer side surface, be coated with described protective coating, described protective coating forms the compound base material of copper steel by metallurgy combination, described base material spiral is arranged to tubular structure, and the contacted side of described base material is welded to connect and forms weld seam.
3. the high anti-corrosion copper steel composite screw welded tube of ocean engineering according to claim 2, is characterized in that, described protective coating is the copper steel composite armor.
4. the high anti-corrosion copper steel composite screw welded tube of ocean engineering according to claim 3, is characterized in that, on the outer side surface of described protective coating, be provided with the copper powder layer, described copper powder layer is covered on described weld seam.
CN201320283529XU 2013-05-21 2013-05-21 High-corrosion-resistant copper bearing steel composite spiral welded pipe for oceanographic engineering Expired - Fee Related CN203297771U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320283529XU CN203297771U (en) 2013-05-21 2013-05-21 High-corrosion-resistant copper bearing steel composite spiral welded pipe for oceanographic engineering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320283529XU CN203297771U (en) 2013-05-21 2013-05-21 High-corrosion-resistant copper bearing steel composite spiral welded pipe for oceanographic engineering

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CN203297771U true CN203297771U (en) 2013-11-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104085146A (en) * 2014-06-05 2014-10-08 宁波宇能复合铜带有限公司 Method for employing copper-steel composite board to prevent adhesion corrosion of marine organisms and preparation method for copper-steel composite board

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104085146A (en) * 2014-06-05 2014-10-08 宁波宇能复合铜带有限公司 Method for employing copper-steel composite board to prevent adhesion corrosion of marine organisms and preparation method for copper-steel composite board

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Granted publication date: 20131120

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