CN100436908C - Clad pipe - Google Patents
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- CN100436908C CN100436908C CNB2005100690173A CN200510069017A CN100436908C CN 100436908 C CN100436908 C CN 100436908C CN B2005100690173 A CNB2005100690173 A CN B2005100690173A CN 200510069017 A CN200510069017 A CN 200510069017A CN 100436908 C CN100436908 C CN 100436908C
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Abstract
A clad pipe includes an external layer and a coating layer made of Ni base anticorrosion alloy. Both end portion areas of the coating layer are formed by a build-up welded layer (Ni base alloy of composition 1 ) on the inner surface of the external layer. Other areas are formed by a Ni base alloy layer (Ni base alloy of composition 2 ) fusion-bonded to the build-up welded layers and the inner surface of the pipe, a solidus-curve temperature of the Ni base alloy layer being 1300 DEG C. or below and lower than a solidus-curve temperature of the Ni base alloy formed by build-up welding by 150 DEG C. or more. Composition 1 and composition 2 are adjusted so that, in the same environment, corrosion resistance of the Ni base alloy of composition 1 is equivalent to or superior to that of the Ni base alloy of composition 2.
Description
Technical field
The present invention relates to the structure of the good composite pipe of corrosion resistance, relate in more detail in pipe internal surface lining to good Ni base alloy such as the corrosion resistance of hydrogen sulfide etc., mainly be used in the structure of the composite pipe of transport pipe, oil well pipe.
Background technique
Bury in the more ground of corrosion compositions such as hydrogen sulfide in oil, gas field, be used in exploitation and the oil well pipe of carrying the oil contain this corrosion composition, rock gas (hereinafter referred to as " crude oil class ") and transport pipe and then be used for while supplying with the drill pipe that the mud that contains identical corrosion composition excavates (below be generically and collectively referred to as " oil well tubing "), particularly above-mentioned corrosive fluid upgrade constantly and the internal surface of the pipe that contacts on, must have the corrosion resistance that can resist these corrosion compositions.
From such viewpoint, above-mentioned oil well tubing is high alloy steel pipe preferably, but because its cost obviously improves when forming the full depth of pipe with high alloy, thus commonly used be only pipe internal surface to be made as high alloy and the composite pipe (bimetallic tube) of outer employing common steel tube.
Composite pipe always has following 2 kinds of structures.
(1) structure of the high Ni alloy of built-up welding high corrosion resistance on the inner face of common steel tube;
(2) with the pipe of the high Ni alloy that on the inner face of common steel tube, embeds high corrosion resistance and engage the structure that forms.
The former is disclosed in the non-patent literature 1.
The latter is disclosed in the patent documentation 1.
The former problem is:
1. because in the enterprising windrow weldering of the pipe inner face of long size, so pipe can bend.
2. form the diluent zone of mother metal composition and scolder (meat Sheng) composition during owing to built-up welding in the boundary portion branch of mother metal steel pipe and solder layer (overlay cladding), for the overlay cladding that makes predetermined component forms the thickness of regulation, must extra many built-up welding go out the thickness part of diluent zone.Its result just has the shortcoming that causes cost up.
3. so do not have clear and definite border between diluent zone mother metal and solder layer because of existing.Consequently have the shortcoming that is difficult to measure in nondestructive mode the loss state of solder layer from the outside of pipe.
The latter's problem points is:
1. for outboard tube and inside tube are engaged, when embedding, must make the boundary portion of inner and outer pipes that the gap does not take place, so the machining tolerance of necessary strict control internal diameter, external diameter.It is high that thereby cost becomes.
2. it is difficult in addition, obviously making long size goods.
Non-Patent Document 1: the distribution of juridical person's investigation of materials development centre, No. the 166th, JRCM NEWS/.
Patent Document 1: the spy opens flat 6-142948 communique.
Summary of the invention
The present invention proposes in view of this problem, its the 1st purpose is, it is that the corrosion resistance of oil well tubing of main corrosion composition is good and can measure the composite pipe of structure of novelty of the loss state of inboard coating from the non-destructive ground, the outside of pipe that a kind of suitable hydrogen sulfide that is used in is provided.Its 2nd purpose is, provides a kind of and can more easily will manage joint as required by welding, can be extended for the composite pipe of the structure of the novelty of length arbitrarily.
Problem of the present invention can be solved by following 1～10 scheme.
That is:
1. composite pipe, it is the composite pipe that is coated with the structure of Ni base corrosion resistant alloy on the outer inner face that is made of common steel tube or low alloy steel, it is characterized in that, the zone at the two end part of this coating is formed on the steel pipe inner face by built-up welding (forming 1 Ni base alloy), zone beyond this overlay cladding is to make solidus temperature at 1300 ℃ or below it, and be grouped into the layer of the Ni base alloy of (forming 2 Ni base alloy) than solidus temperature of this Ni base alloy that forms by built-up welding low 150 ℃ or one-tenth more than it, the structure that welding forms on this overlay cladding and this steel pipe inner face, and for the corrosion resistance under equivalent environment, equate with the corrosion resistance of the Ni base alloy of this compositions 2 or mode more than it with this corrosion resistance of forming 1 Ni base alloy, adjustment composition 1 and composition 2 become to be grouped into.
2. composite pipe, it is the composite pipe that is made of following structure, wherein said structure, it is the ring that on the outer end face that constitutes by common steel tube or low alloy steel, engages Ni base corrosion resistant alloy (forming 1 Ni base alloy) with internal diameter littler than the internal diameter of this outer layer pipe metallurgically, in the zone that the weld side end face by the inner face of this outer layer pipe and this ring is divided into, fill solidus temperature 1300 ℃ or below it and be grouped into than the solidus temperature of the Ni base alloy of this ring low 150 ℃ or one-tenth more than it (forming 2 Ni base alloy) Ni base alloy layer, and the structure that its welding is formed on the weld side end face of this ring and this steel pipe inner face, it is characterized in that, form the corrosion resistance under same environment that 1 Ni base alloy and this are formed 2 Ni base alloy for this, equate with the corrosion resistance of the Ni base alloy of this compositions 2 or mode more than it with this corrosion resistance of forming 1 Ni base alloy, adjustment composition 1 and composition 2 become to be grouped into.
3. as any described composite pipe of scheme of above-mentioned 1 or 2, it is characterized in that the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：15～45％ B：2.5～5.0％ Si：2.0～5.0％
C:0.2～1.5% Mo :≤20% all the other be Ni and impurity.
4. as above-mentioned 3 described composite pipes, it is characterized in that the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：30～40％ B：3.0～5.0％ Si：3.0～5.0％
All the other are Ni and impurity for C:0.4～0.8% Mo:2～10%.
5. as any described composite pipe of above-mentioned 1 or 2, it is characterized in that the composition range of the Ni base alloy of above-mentioned composition 2 is:
B：1.0～5.0％ Si：3.0～25.0％
Fe+Co：0～15％ Mo+1/2W：0～20％
C：0～1.5％ V+Nb+Ta：0～10％
Al：0～1％ Cu：0～3％
All the other are Ni and impurity.
6. as any described composite pipe of above-mentioned 1 or 2, it is characterized in that the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：0～25％ B：0～1.7％ Si：6～25％
Fe+Co：0～15％ Mo+1/2W：0～20％
C：0～1.5％ V+Nb+Ta：0～10％
Al：0～1％ Cu：0～3％
All the other are Ni and impurity.
7. any described composite pipe in above-mentioned 1～6 is characterized in that, a composition in the composition that the basic alloy of the Ni of above-mentioned composition 1 is selection following 1～6:
1.Cr：20.5～22.5％ Mo：8.0～10.0％
Fe：2.0～3.0％ Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.4～3.8%
All the other are Ni and impurity
2.Cr：20.0～22.0％ Mo：8.0～9.0％
Fe：7.0～8.0％ Ti：1.3～1.7％
Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.3～3.7%
All the other are Ni and impurity
3.Cr：20.5～22.5％ Mo：2.0～2.4％
Fe：29.0～31.0％ Cu：2.0～2.4％
Si：≤1.0％ Mn：≤1.0％
(Ti) in addition: 0.8～1.0%
All the other are Ni and impurity
4.Cr：20.0～22.0％ Mo：2.0～4.0％
Fe：27.0～29.0％ Cu：1.6～2.0％
C :≤0.01% Ti:2.0～2.2% in addition
Ni：44.0％
5.Cr：15.5～17.5％ Mo：16.0～18.0％
W：3.75～5.25％ Fe：4.5～7.0％
Co：≤2.5％ Si：≤1.0％ Mn：≤1.0％
C：≤0.12％ V：0.2～0.4％
All the other are Ni and impurity
6.Cr：14.5～16.5％ Mo：15.0～17.0％
W：3.0～4.5％ Fe：4.0～7.0％
Co：≤2.5％ Si：≤0.05％ Mn：≤1.0％
C：≤0.02％ V：≤0.35％
All the other are Ni and impurity
8. as any described composite pipe in above-mentioned 1～7, it is characterized in that coated with resin on the outer surface of the steel pipe of above-mentioned composite pipe.
9. as any described composite pipe in above-mentioned 1～7, it is characterized in that heat-resisting, the corrosion resistant metal of lining on the outer surface of the steel pipe of above-mentioned composite pipe.
As above-mentioned 1～9 in any described composite pipe, it is characterized in that above-mentioned composite pipe is to use in the composite pipe of oil well tubing.
The present invention has following effect:
(1) has good corrosion resistance for hydrogen sulfide.
(2) all be that heavy alloyed pipe is compared inexpensive with the pipe full depth.
(3) welding joint of pipe is easy, can be extended for length (can certainly carry out screwed union connects) arbitrarily.
(4) can measure the loss state of coating from the outside non-destructive ground of pipe.
Description of drawings
Fig. 1 is the explanatory drawing of essential structure of the present invention.
Fig. 2 is the explanatory drawing of essential structure of the present invention.
Fig. 3 is the explanatory drawing of essential structure of the present invention.
Fig. 4 is the figure that the situation after the built-up welding has been described.
Fig. 5 is the explanatory drawing that makes the method for fused solution welding.
Fig. 6 is the explanatory drawing of embodiment's weld part.
Fig. 7 is the explanatory drawing of embodiment's weld part.
Fig. 8 is the explanatory drawing of screw cutting (threading) structure.
Fig. 9 is the explanatory drawing of screw cutting structure.
1 outer 2 coatings
3 overlay claddings 4 are formed 2 Ni base alloy-layer (zone 4)
Embodiment
The present invention is described with reference to the accompanying drawings.
Fig. 1～Fig. 3 is the explanatory drawing of the essential structure of composite pipe of the present invention.
In Fig. 1,2, be outer 1 by common steel tube or low alloy steel constitute, coating 2 is made of Ni base corrosion resistant alloy structure.
The zone at the two end part of coating 2 forms by built-up welding (forming 1 Ni base alloy).
The interval that by overlay cladding 3 clampings at two ends (zone 4), by the layer formation of solidus temperature at 1300 ℃ or the Ni base alloy (forming 2 Ni base alloy) that is grouped into below it and than the solidus temperature of the Ni base alloy that forms by built-up welding (forming 1 Ni base alloy) low 150 ℃ or one-tenth it more than, the structure that forms with the inner face welding of overlay cladding 3 and skin 1.And for the corrosion resistance under same Environmental Conditions, according to the corrosion resistance of forming 1 Ni base alloy and the corrosion resistance mode identical or more than it of forming 2 Ni base alloy adjust form 1 and composition 2 become to be grouped into.
When fluid (for example crude oil) when the inner face of composite pipe flows, coating 2 integral body of composite pipe inner face, promptly form 1 overlay cladding and form 2 zone 4 and obviously all be exposed in the atmosphere gas of same fluid.So-called in this specification " corrosion resistance under the identical Environmental Conditions " is meant " corrosion resistance when being exposed in the same fluid atmosphere gas ", and this fluid atmosphere gas is meant the fluid that mainly there is corrosion compositions such as hydrogen sulfide (as crude oil) atmosphere gas.In addition, so-called among the present invention " welding " is meant that between outer (steel pipe) and overlay cladding 3 only the grade with tens of μ m forms the diluent zone that the mutual blending of material forms, in fact by wellability and the meaning of welding.That is to say, between the basic alloy-layer of the Ni that forms 2 and overlay cladding 3 and outer 1, become the joint interface that does not have the diluent zone that hinders the such thickness of non-damage type mensuration.
Therefore, have clear and definite border between the Ni of composition 2 base alloy-layer and the overlay cladding 3 and outer 1, the thickness of the Ni base alloy-layer of composition 2 can be measured from non-damage type ground, the outside of pipe.Therefore in use can measure the loss state from outside non-destructive ground.
In addition, owing between overlay cladding and external pipe, there is the diluent zone that forms by welding, so can not measure the loss state of overlay cladding from the non-destructive ground, the outside of pipe, but as long as adjust the loss state that causes by corrosion, be corrosion resistance according to the mode of the basic alloy of Ni of forming Ni base alloy 〉=compositions 2 of 1, then not only can know the thickness of the Ni base alloy-layer of composition 2, and can know the thickness of overlay cladding.
The corrosion resistance that why will form 1 Ni base alloy in the present invention is made as identical with the corrosion resistance of forming 2 the basic alloy of Ni or more than it, just is based on above such reason.
The formation of the coating 2 of outer 1 inner face is carried out as follows.
Built-up welding Ni base corrosion resistant alloy (forming 1 Ni base alloy) on the two end portions of external pipe inner face at first.
The zone of carrying out built-up welding be basically at the external pipe inner face two end part, along of the width built-up welding of pipe range direction with tens of millimeters, but in view of desired material behavior of weld part etc., also can be as required during welding the end face of external pipe be also carried out built-up welding.
The thickness of solder layer, as long as can guarantee to weld after back, the machining from the inner face of external pipe and swell thickness about 5～15mm substantially, but since in built-up welding and mother metal (being outer field plain carbon steel, low alloy steel) between have diluent zone, so need the thickness of the thickness+machining allowance gained of built-up welding diluent zone during actual welding.
After the welding, just made the weir (ridge) that forms by built-up welding at the two end part of pipe inner face.
The figure of the situation that Fig. 4 is the formation of explanation after the built-up welding weir (ridge).
The alloy of built-up welding (forming 1 Ni base alloy) can use known high corrosion resistance Ni base alloy such as inconel 625, inconel725, incoloy 825, incoloy 925, Hastelloy C, Hastelloy C-276 rightly or have or corrosion resistance it more than equal with them and have the equal or solidus temperature more than it (promptly begin melt temperature higher) and wait other high corrosion resistance Ni base alloy.
After built-up welding portion (weir) having been carried out size finishing by machining, in the space that is separated out by Yan Heyan, inject the fused solution of forming 2 the basic alloy of Ni, make weld part and fused solution and outer layer pipe inner face and fused solution welding.
The structure of Fig. 3 is to replace the built-up welding of passing through of Fig. 1, Fig. 2 to form weir (ridge), engages the ring of Ni base alloy (forming 1 Ni base alloy) metallurgically and form the structure on weir (ridge) on the both ends of the surface of outer layer pipe 1.
The internal diameter (radius) of ring, than the internal diameter (radius) of external pipe little with the suitable degree of thickness of forming 2 Ni base alloy-layer.
As method at the metallurgical ground of both ends of the surface of outer layer pipe 1 adapter ring, can suit use welding (arc welding, electron beam welding etc.), crimping (friction welded etc.) etc.
The material of ring can suit to use to cut into goods that annular shape forms or the like with the casting product of the resurfacing welding material same material of the structure of Fig. 1, Fig. 2, forged article, welding product (bend to manage and seam is welded plate) or by plate.In addition, the ring that also can replace as above routine such full depth all to be made of the Ni base alloy of forming 1 has constituted the ring that the ring outer circumferential side forms and adopt by plain carbon steel or low alloy steel.
As making the method for forming 2 Ni base alloy-layer and the inner face welding of overlay cladding (perhaps encircling), outer layer pipe 1, method shown in Figure 5 is the most effective.That is:
External pipe was laterally fallen, pipe was carried out induction heating or gas flame heating while rotate.When the temperature of pipe reaches near the necessary temperature of fused solution welding (solidus temperature of fused solution), fused solution is injected in the pipe, the centrifugal force that acts on the pipe internal surface with the principle according to centrifugal casting is that 3G or the mode more than it are rotated on one side, fused solution with the pressure of equalization be pressed on whole of pipe internal surface go up and make itself and pipe inner face welding on one side.At this moment, fused solution also with overlay cladding (perhaps ring) welding.
After making the fused solution welding, solidify while rotate to cool off until the welding layer.
Rate of cooling after also can solidifying and carry out the heat treatment of external pipe and solder layer ordinatedly by adjustment.Also can accelerate rate of cooling and carry out the quenching of external pipe, the solution treatment of solder layer.In addition, also can after temporarily being cooled to normal temperature, carry out the heat treatment of external pipe and solder layer again.
As previously mentioned, in order to measure the loss state of forming 2 Ni base alloy (solidification layer of fused solution) from the outside non-destructive ground of external pipe, its necessary condition be with outer field boundary portion on do not form the diluent zone that two sides' material mixes.Promptly must be only to make the external pipe fusing with the level that matches with wellability, welding be on the inner face of external pipe.
It is following and make its solidus temperature than the Ni base alloy (forming 1) of built-up welding portion's (perhaps ring) low 150 ℃ or more than it that the solidus temperature that why will form 2 Ni base alloy is limited to 1300 ℃ or its, is because this is the necessary condition of diluent zone ground welding on solder layer (perhaps encircling) and skin that is used to that fused solution is not generated and surpasses the such thickness of 100 μ m.
When solidus temperature surpasses 1300 ℃, when the above-mentioned welding, because sometimes even the growth of diluent zone can occur not only staying in, and make the external pipe fusing form perforate, thereby cause fused solution to drain to outside situation, thereby very undesirable.In addition, why low 150 ℃ or more than it, this is because if temperature difference is lower than 150 ℃ than the solidus temperature of the Ni base alloy (forming 1) of built-up welding portion's (perhaps ring), then the fusion penetration of built-up welding portion (perhaps ring) becomes fierce, just can not keep its shape, thus very undesirable.
For outer layer pipe 1, can use the normal carbon steel pipe of C≤0.5%, perhaps as low alloy steel C≤0.5%, Si:0.15～0.35%, Mn:0.3～1.7%, Ni: Cr～4.5%: Mo～3.5% :～1.0% and as required and trace is added with the steel of compositing range of the reactive metal element of Nb, Ta, Ti, V etc., whole steel grades (JIS SNC) of whole steel grades (JIS SCM) of whole steel grades of nickel chromium molybdenum steel steel (JIS SNCM), Cr-Mo steel steel, nickel chrome steel steel etc. for example.As the Ni base alloy of forming 1, at the high Ni base corrosion resistant alloy that has used inconel 625, inconel 725, incoloy825, incoloy 925, Hastelloy C, Hastelloy C-276 etc. and when having or corrosion resistance it more than equal and having other Ni base alloy of equal or solidus temperature more than it with it, as the Ni alloy (the becoming to be grouped into of fused solution) of the composition 2 of condition that satisfies above-mentioned solid phase line temperature and above-mentioned corrosion resistance condition, following alloy composition is comparatively suitable.In addition, so-called above-mentioned corrosion resistance condition, be meant foregoing like that for the corrosion resistance under equivalent environment, the corrosion resistance of forming 1 Ni base alloy is configured to condition identical with the corrosion resistance of forming 2 the basic alloy of Ni or more than it, and so-called corrosion resistance is meant the corrosion resistance under the environment of the corrosion composition that mainly has hydrogen sulfide etc.
The one-tenth of the Ni base alloy of above-mentioned composition 2 is grouped into and is preferably following composition range (alloy 1).
Cr：15～45％ B：2.5～5.0％ Si：2.0～5.0％
C:0.2～1.5% Mo :≤20% all the other be Ni and impurity.
The Ni base alloy of above-mentioned compositing range, corrosion resistance is all poor than the high Ni base corrosion resistant alloy of above-mentioned inconel 625, inconel 725, incoloy 825, incoloy 925, Hastelloy C, Hastelloy C-276 etc., satisfies above-mentioned corrosion resistance condition.And solidus temperature is at 1300 ℃ or below it, lower 150 ℃ or more than it than the solidus temperature of the high Ni base corrosion resistant alloy of inconel 625, inconel 725, incoloy 825, incoloy 925, Hastelloy C, HastelloyC-276 etc., can be well and outer layer pipe and overlay cladding (perhaps being bonded on the ring on the end face) welding.
In addition, the corrosion resistance in hydrogen sulfide atmosphere gas, more preferably following ranges in the mentioned component scope:
Cr：30～40％ B：3.0～5.0％ Si：3.0～5.0％
All the other are Ni and impurity for C:0.4～0.8% Mo:2～10%.
The qualification reason of alloy component range
Because then corrosion resistance is poor if Cr is lower than lower limit, thereby preferably in lower limit or more than it.When surpassing CLV ceiling limit value, fusing point uprises, can not satisfy above-mentioned solid phase line temperature condition (solidus temperature≤1300 ℃, than the solidus temperature of the Ni base alloy of built-up welding portion low 150 ℃ or more than it), so undesirable.
B, Si be for reduce fusing point, the necessary element of wellability when keeping the welding fused solution, but the interpolation that surpasses the upper limit can make material significantly become fragile, thereby undesirable.If it is be lower than lower limit, then not ideal enough because of the condition that can not satisfy above-mentioned solid phase line temperature.
C has the effect that prevents the oxidation of fused solution and improve castability when the Ni base alloy of the high Cr of fusing, thereby preferably adds lower limit at least or more than it, but surpass last in limited time, so not ideal enough because can not obtain sufficient corrosion resistance.
Mo has the corrosion proof effect of improvement, thereby preferably adds, but above the interpolation of the upper limit fusing point is raise, and can not satisfy the condition of above-mentioned solid phase line temperature, thereby just undesirable.
As the Ni base alloy of the composition 2 of condition that satisfies above-mentioned solid phase line temperature and above-mentioned corrosion proof condition, following alloy composition (alloy 2) is more suitable.
B：1.0～5.0％ Si：3.0～25.0％
Fe+Co：≤15％ Mo+1/2W：≤20％
C：≤1.5％ V+Nb+Ta：≤10％
Al：≤1％ Cu：≤3％
All the other are Ni and impurity
The alloy of this composition is to be the alloy of necessary composition with Ni-B-Si, is the alloy that does not contain Cr substantially.
The alloy of this composition, extremely excellent to the corrosion resistance of hydrogen sulfide, fusing point (solidus) also low (950～1150 ℃), wellability is extremely good, can with deposited metal and outer layer pipe welding extremely well.
Si is as corrosion resistance and the element that reduces fusing point effective elements extremely.If be lower than lower limit then can not obtain good corrosion resistance.If be lower than lower limit in addition then fusing point raises, can not satisfy the condition of above-mentioned solid phase line temperature thereby not good.Can not change corrosion resistance even surpass the CLV ceiling limit value interpolation in addition yet.But because of becoming extremely crisp thereby not good.
B is used to reduce fusing point, the necessary element of wellability when keeping welding, but the interpolation that surpasses the upper limit can make material obviously become fragile thereby be not good.If be lower than lower limit then can not satisfy the condition of above-mentioned solid phase line temperature thereby not good.
The relation of Si and B can according to when B is low (when approaching the value of lower limit) composition that the composition of Si is made as the eutectic temperature that approaches Ni-Si is set in the mode that reduces fusing point.
Fe, Co can be used as the Ni substitute and the composition that uses, and total can use 15%.Because when surpassing the last problem thereby not good that aspect corrosion resistance, can take place in limited time.
Mo, W, Al, Cu composition not necessarily in the alloy of this composition, but very effective to the etching characteristic that improves except that hydrogen sulfide.
Also can add Mo+1/2W to 20%, add Al to 1%.Also Cu can be added 3%.The interpolation that surpasses the upper limit of Mo, W, Al can make fusing, the castability variation thereby not good of alloy.In addition, the interpolation that surpasses the upper limit of Mo, W can make fusing point raise thereby be not good.The interpolation that surpasses the upper limit of Cu can make alloy become fragile thereby be not good.V, Nb, Ta use for C, N in the firm alloy, the harm of B, but can make fusing, the castability variation thereby not good of alloy above the interpolation of the upper limit.
Because C can improve fusing, the castability of alloy, thus also can add 1.5% to, if but then be difficult to more than 1.5% be melted in the alloy, make fusing, castability become difficulty on the contrary, so be preferably CLV ceiling limit value or below it.
Impurity is the element of P, S, O, Mg, Ca, Y, Ce etc.Preferred P, S, O, Mg, Ca, Y, Ce≤0.1%.In addition, Cr is preferably 0.2% or below it.Preferred Mn≤1%.
As the Ni alloy of the composition 2 of condition that satisfies above-mentioned solid phase line temperature and above-mentioned corrosion proof condition, following alloy composition (alloy 3) also is fit to.
Cr：≤25％ B：≤1.7％ Si：6～25％
Fe+Co：≤15％ Mo+1/2W：≤20％
C：≤1.5％ V+Nb+Ta：≤10％
Al：≤1％ Cu：≤3％
All the other are Ni and impurity
The alloy of this composition is to be the alloy of necessary composition with Ni-Si.
The alloy of this composition is extremely excellent aspect the corrosion resistance of hydrogen sulfide, fusing point also lower (1050～1250 ℃), wellability is also good, can with deposited metal (perhaps ring material) and outer layer pipe welding well.
Si is necessary composition, is the extremely important element as the element of corrosion resistance and reduction fusing point.When being lower than lower limit, can not obtain good corrosion resistance.When being lower than lower limit in addition, fusing point raises, and can not satisfy the condition of above-mentioned solid phase line temperature, thereby not good.Do not change corrosion resistance even surpass the CLV ceiling limit value interpolation in addition yet.Surpass last prescribing a time limit in addition, because of alloy becomes extremely crisp thereby not good.
B be reduce fusing point, make wellability good aspect effective elements extremely, and B and≤Cr of 25% scope can coexist, when B ultrasonic crosses 1.7%, the remarkable variation of corrosion resistance thereby not good.That is to say, B 1.7% or situation below it under, also can not change corrosion resistance even Cr changes in≤25% interval, but when B ultrasonic crossed 1.7%, corrosion resistance was reduced to extremely.Therefore, adding under the situation of B, be at most to 1.7% for reducing fusing point.Why B is defined as 1.7% or be exactly below it according to above reason.
Cr is 0% o'clock, though B ultrasonic cross 1.7% corrosion resistance can variation yet.Just become the composition identical this moment with the composition of above-mentioned alloy 2.
Cr improves corrosion proof element, be to be purpose and the element that usually adds with the corrosion resistance, but be 6～25% at Si, B be 1.7% or during the scope below it in the scope of coexistence, even the Cr amount 0～25% variation, can not change with respect to the corrosion resistance of hydrogen sulfide yet.
Under the atmosphere gas that is mixed with the corrosion composition beyond the hydrogen sulfide, be that purpose is added under the situation of Cr with the corrosion resistance improved the corrosion composition beyond the hydrogen sulfide, the alloy of this compositing range is extremely effective.
Just raise when Cr surpasses last fusing point in limited time, just can not satisfy the condition of above-mentioned solid phase line temperature, can not obtain good welding.
Fe, Co can be used as the substitute of Ni and the composition that uses, and total can use 15%.When surpassing last meeting generation problem thereby not good on corrosion resistance in limited time.
Mo, W, Al, Cu composition not necessarily in the alloy of this composition, but the etching characteristic that improves except that hydrogen sulfide is produced effect very much.
Can add Mo+1/2W to 20%, add Al to 1%.Also can add Cu to 3%.The interpolation that surpasses the upper limit of Mo, W, Al can make fusing, the castability variation thereby not good of alloy.In addition, the interpolation that surpasses the upper limit of Mo, W can make fusing point raise thereby be not good.The interpolation that surpasses the upper limit of Cu can make alloy become fragile thereby be not good.
V, Nb, Ta use for C, N in the firm alloy, the harm of B, but can make fusing, the castability variation thereby not good of alloy above the interpolation of the upper limit.Preferred Mn≤1%.Impurity is the element of P, S, O, Mg, Ca, Y, Ce etc.Preferred P, S, O, Mg, Ca, Y, Ce≤0.1%.
Inconel 625, inconel 725, incoloy 825, incoloy 925, Hastelloy C, Hastelloy C-276 are the trade names of commercially available alloy, are following compositions.
1.inconel 625
Cr：20.5～22.5％ Mo：8.0～10.0％
Fe：2.0～3.0％ Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.4～3.8% all the other be Ni and impurity
2.inconel 725
Cr：20.0～22.0％ Mo：8.0～9.0％
Fe：7.0～8.0％ Ti：1.3～1.7％
Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.3～3.7% all the other be Ni and impurity
3.incoloy 825
Cr：20.5～22.5％ Mo：2.0～2.4％
Fe：29.0～31.0％ Cu：2.0～2.4％
Si：≤1.0％ Mn：≤1.0％
(Ti) in addition: 0.8～1.0% all the other be Ni and impurity
4.incoloy 925
Cr：20.0～22.0％ Mo：2.0～4.0％
Fe：27.0～29.0％ Cu：1.6～2.0％
C :≤0.01% Ti:2.0～2.2% in addition
Ni：44.0％
5.Hastelloy C
Cr：15.5～17.5％ Mo：16.0～18.0％
W：3.75～5.25％ Fe：4.5～7.0％
Co：≤2.5％ Si：≤1.0％ Mn：≤1.0％
C：≤0.12％ V：0.2～0.4％
All the other are Ni and impurity
6.Hastelloy C-276
Cr：14.5～16.5％ Mo：15.0～17.0％
W：3.0～4.5％ Fe：4.0～7.0％
Co：≤2.5％ Si：≤0.05％ Mn：≤1.0％
C：≤0.02％ V：≤0.35％
All the other are Ni and impurity
Carrying pipe arrangement etc. and will manage connection by welding the time, in order to form at the soldered each other joint of inboard built-up welding portion (weir).
Though the loss state of weld part can not be measured from the outside non-destructive ground of pipe, by the material of weld part is elected as aspect the corrosion resistance than the better material of material of weld part internal layer portion in addition, just can omit the mensuration of weld part.Because weld portion of the present invention the material in (zone 4) with respect to the material (perhaps ring) of coating solder portion being solder portion (perhaps ring)＞zone 4 aspect the corrosion resistance, so can omit the mensuration of weld part.That is to say,,, also can prevent the accident of generator tube because of the loss of this part even can not measure because the material of the loss ratio weld portion of solder portion (zone 4) is little.
Engage and during extending length, end face is docked then each other weld will managing.That is, if the pipe of the edge face structure of Fig. 1, then make between the skin, involutory respectively and carry out welding joint between the solder layer.If the structure of Fig. 2, the solder layer that then makes end face is involutory each other and carry out welding joint with identical welding consumables.At this moment, after welding, can recover corrosion resistance if carry out the solution heat treatment of weld part.
When pipe of the present invention is used as oil well pipe, to the end screw cutting of pipe the time, can on axle direction, make the solder layer built-up welding as shown in Figure 8 for thicker, thereby on the peripheral part of solder layer screw cutting.Perhaps also can by welding metalwork be bonded on the end of pipe, at the periphery screw cutting of metalwork as shown in Figure 9 to prepare the spreading metalwork with the solder layer identical materials.The pipe box that perhaps also can use inner face side at least to constitute by corrosion resistant alloy.
In addition, so-called in the present invention low alloy steel, basically be composition range with the steel grade of following 1～5 defined, i.e. C≤0.5%, Si:0.15～0.35%, Mn:0.3～1.7%, Ni: Cr～4.5%: Mo～3.5% :～1.0% and as required and trace is added with the steel of compositing range of the reactive metal element of Nb, Ta, Ti, V etc.
1. whole steel grades of nickel chromium molybdenum steel steel: JIS SNCM220,240,415,420,431,439,447,616,625,630,815.
2. whole steel grades of Cr-Mo steel steel: JIS SCM415,418,420,421,430,432,435,440,445,822.
3. whole steel grades of nickel chrome steel steel: JIS SNC236, SNC415, SNC631, SNC815, SNC836.
4.H whole steel grades of steel:
SMn420H、SMn433H、SMn438H、SMn443H、
SMn420H、SMn443H。
SCr415H、SCr420H、SCr430H、SCr435H、
SCr440H。
SCM415H、SCM418H、SCM420H、SCM435H、
SCM440H、SCM445H、SCM822H。
SNC415H、SNC631H、SNC815H。
SNCM220H、SNCM420H。
Other: STBA seamless steel tube for boiler etc.
For the corrosion of the superficies that prevent composite pipe of the present invention, be effective at the resin of surface-coated polyethylene, epoxy resin, phenolic resin etc.
In addition; external pipe is covered on inner face when forming 2 alloy; external pipe is exposed in the high temperature surface can be oxidized; for anti-oxidation, effectively on superficies, apply by spraying plating lining Cr or refractory steel etc., plating Cr in advance or ooze that Al handles etc. or clay or flakey metal etc. is engaged in the temporary protection lining that the coating that forms in the stable on heating medium (PVC ヒ Network Le) is realized.
＜embodiment 1 〉
Outer layer pipe uses the STKM13A mechanical realization carbon steel tubing of following specification.
The STKM13A mechanical realization with the chemical composition of carbon steel tubing is:
C：≤0.20％ Si：≤0.35％ Mn：≤0.60％
P：≤0.04％ S：≤0.04％。
Outer layer pipe is processed as external diameter 315mm φ, internal diameter 275mm φ, length 2000mm.
It is such that Fig. 6 is processed in the inner face end, the Ni base alloy that built-up welding and inconel 625 are suitable.After the built-up welding, be machined into Fig. 7 (thickness of solder layer: 6mm) like that.
To manage laterally and fall, should be heated to 1050 ℃, in the fused solution ascending pipe while rotating with following composition associative perception.
The chemical composition of fused solution is:
Cr：18％ C：0.8％ B：3.5％
All the other are Ni and impurity for Si:4.0%
The implantation temperature of fused solution is 1250 ℃, and the solidus temperature of the fused solution of injection approximately is 1100 ℃, and the temperature difference of the solidus of the fused solution of injection and the alloy of solder portion approximately is 250 ℃.
With the whole induction heating to 1150 on one side ℃ that injects behind the fused solution, on one side so that centrifugal force becomes 3G or its above mode makes its rotation 2 minutes, then while selecting slow cooling.
The result
The non-damage type inspection of boundary portion jointing state
Utilize ultrasonic flaw detection to check the joining portion from the outside of pipe.
Do not observe deposited bad.In addition, the solidification layer of injecting the part of fused solution is the thickness of 4.5～5.5mm, is certain substantially.
After the ultrasonic examination, solder layer and the boundary portion of injecting fused solution and fused solution are cut 5 places with outer field part, survey the thickness of connecting state and solidification layer.
Do not observe deposited bad.The measured value of solidified layer thickness and the result of ultrasonic examination are integrated.
Can confirm that pipe of the present invention can be measured the loss state of internal layer from the outside.
＜embodiment 2 〉
Corrosion test 1 (embodiment of alloy 1)
One-tenth is grouped into different Ni base alloys placed 48 hours under the atmosphere gas that flows of humidifying vulcanizing hydrogen, corrosion proof comparative test is carried out in the variation (increment) of investigation weight.
Specimen size: 20 * 20 * 5mm
The flow of hydrogen sulfide: 100 ml/min
Time: 48 hours
Temperature: room temperature
The measurement result that the one-tenth of Ni base alloy (alloy 1) is grouped into corrosion weight grow is shown in table 1.
Table 1
Weight change: μ g/mm
2
| Sequence number | Cr | B | Si | C | Fe、Co | Mo | Nb | Ni | Weight change | Remarks |
| 1 | 15 | 3.2 | 4.4 | 0.7 | Fe3.5 | All the other | 5.210 | |||
| 2 | 18 | 3.5 | 4.0 | 0.3 | Co3.0 | 16 | All the other | 1.680 | ||
| 3 | 15 | 3.1 | 4.3 | 0.8 | Fe3.5 | All the other | 3.110 | |||
| 4 | 20 | 2.8 | 4.5 | 0.5 | Fe+Co8.0 | All the other | 2.130 | |||
| 5 | 25 | 4.0 | 2.5 | 0.6 | Co6.0 | 2.0 | All the other | 1.787 | ||
| 6 | 32 | 4.3 | 3.5 | 0.9 | Fe2.0 | All the other | 0.901 | |||
| 7 | 37.1 | 3.6 | 3.4 | 0.6 | 3 | All the other | 0.855 | |||
| Comparative material 1 | 21.5 | 0 | 0.2 | 2.5 | 9 | 3.6 | All the other | 0.38 | The Inco625 | |
| Comparative material | ||||||||||
| 2 | 23.0 | 0 | 0.2 | 9 | 3.5 | All the other | 0.620 | Inco625 is rolling |
The result
Result by table 1 can confirm, the Ni base alloy of the composition range of alloy 1 is all poorer than any of the welding consumables (Inco625 welding) of inconel 625 and rolling stock (Inco625 is rolling) aspect corrosion resistance, satisfies above-mentioned corrosion proof condition.
Can confirm in addition, Cr 30% or alloy more than it better especially with other alloy phase than corrosion resistance.
The alloy of sequence number 1～7, its solidus temperature is all at 1300 ℃ or below it, lower 150 ℃ or more than it than the solidus temperature of inconel 625, inconel 725, Hastelloy C-276, can utilize the method well welding identical on outer layer pipe and overlay cladding with embodiment 1.
＜embodiment 3 〉
Corrosion test 2 (embodiment of alloy 2)
One-tenth is grouped into different Ni base alloys placed 48 hours under the atmosphere gas that flows of humidifying vulcanizing hydrogen, corrosion proof comparative test is carried out in the variation (increment) of investigation weight.
Specimen size: 20 * 20 * 5mm
Hydrogen sulfide flow: 100 ml/min
Time: 48 hours
Temperature: room temperature
The measurement result that the one-tenth of Ni base alloy (alloy 2) is grouped into corrosion weight grow is shown in table 2.
Table 2
Weight change: μ g/mm
2
The result
Result by table 2 can confirm, the Ni base alloy of the composition range of alloy 2 is all poorer than any of the welding consumables (Inco625 welding) of inconel 625 and rolling stock (Inco625 is rolling) aspect corrosion resistance, satisfies above-mentioned corrosion proof condition.
Can confirm that in addition to compare corrosion resistance extremely good with the comparative material that contains Cr.
The alloy of sequence number 1～8, fusing point are all low, and its solidus temperature is at 1300 ℃ or below it, and be lower 150 ℃ or more than it than the solidus temperature of inconel 625, can utilize the method well welding identical with embodiment 1 on outer layer pipe and overlay cladding.
＜embodiment 4 〉
Corrosion test 3 (embodiment of alloy 3)
One-tenth is grouped into different Ni base alloys placed 48 hours under the atmosphere gas that flows of humidifying vulcanizing hydrogen, corrosion proof comparative test is carried out in the variation (increment) of investigation weight.
Specimen size: 20 * 20 * 5mm
Hydrogen sulfide flow: 100 ml/min
Time: 48 hours
Temperature: room temperature
The measurement result that the one-tenth of Ni base alloy (alloy 3) is grouped into corrosion weight grow is shown in table 3.
Table 3
Weight change: μ g/mm
2
The result
Result by table 3 can confirm, the Ni base alloy of the composition range of alloy 3 is all poorer than any of the welding consumables (Inco625 welding) of inconel 625 and rolling stock (Inco625 is rolling) aspect corrosion resistance, satisfies above-mentioned corrosion proof condition.
Can confirm in addition, with contain B be 1.9% or comparative material more than it to compare corrosion resistance extremely excellent.
The alloy of sequence number 1～13, fusing point are all low, and its solidus temperature is at 1300 ℃ or below it, and be lower 150 ℃ or more than it than the solidus temperature of inconel 625, can utilize the method well welding identical with embodiment 1 on outer layer pipe and overlay cladding.
The present invention can be used in the transport pipe of crude oil and oil.Can also be diverted to the oil well pipe of recover petroleum.
Rare metal resources contributions such as Ni, Cr as strategic material, Mo are very big for saving.
Claims (32)
1. composite pipe, it is the composite pipe that is coated with the structure of Ni base corrosion resistant alloy on the outer inner face that is made of common steel tube or low alloy steel, it is characterized in that, its zone that is configured to the two end part of the coating that forms by above-mentioned lining is to form 1 Ni base alloy by built-up welding to form on the steel pipe inner face, the overlay cladding zone in addition that forms by above-mentioned built-up welding is to make solidus temperature at 1300 ℃ or below it, and the layer of the Ni base alloy that is grouped into than solidus temperature of this Ni base alloy that forms by built-up welding low 150 ℃ or one-tenth more than it, welding forms on this overlay cladding and this steel pipe inner face, and it is to form 2 Ni base alloy that wherein said one-tenth is grouped into; And, adjust to form 1 and form 2 become to be grouped into, make aspect the corrosion resistance under equivalent environment that this corrosion resistance of forming 1 Ni base alloy equates with the corrosion resistance of the basic alloy of Ni of this composition 2 or more than it.
2. composite pipe according to claim 1 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：15～45％ B：2.5～5.0％ Si：2.0～5.0％
C:0.2～1.5% Mo :≤20% all the other be Ni and impurity.
3. composite pipe according to claim 2 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：30～40％ B：3.0～5.0％ Si：3.0～5.0％
All the other are Ni and impurity for C:0.4～0.8% Mo:2～10%.
4. composite pipe according to claim 1 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
B：1.0～5.0％ Si：3.0～25.0％
Fe+Co：0～15％ Mo+1/2W：0～20％
C：0～1.5％ V+Nb+Ta：0～10％
Al：0～1％ Cu：0～3％
All the other are Ni and impurity.
5. composite pipe according to claim 1 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：0～25％ B：0～1.7％ Si：6～25％
Fe+Co：0～15％ Mo+1/2W：0～20％
C：0～1.5％ V+Nb+Ta：0～10％
Al：0～1％ Cu：0～3％
All the other are Ni and impurity.
6. according to any described composite pipe in the claim 1～5, it is characterized in that the Ni of above-mentioned composition 1 base alloy is a composition that is selected from following 1～6 the composition:
1.Cr：20.5～22.5％ Mo：8.0～10.0％
Fe：2.0～3.0％ Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.4～3.8%
All the other are Ni and impurity
2.Cr：20.0～22.0％ Mo：8.0～9.0％
Fe：7.0～8.0％ Ti：1.3～1.7％
Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.3～3.7%
All the other are Ni and impurity
3.Cr：20.5～22.5％ Mo：2.0～2.4％
Fe：29.0～31.0％ Cu：2.0～2.4％
Si：≤1.0％ Mn：≤1.0％
Ti:0.8～1.0% in addition
All the other are Ni and impurity
4.Cr：20.0～22.0％ Mo：2.0～4.0％
Fe：27.0～29.0％ Cu：1.6～2.0％
C :≤0.01% Ti:2.0～2.2% in addition
Ni：44.0％
5.Cr：15.5～17.5％ Mo：16.0～18.0％
W：3.75～5.25％ Fe：4.5～7.0％
Co：≤2.5％ Si：≤1.0％ Mn：≤1.0％
C：≤0.12％ V：0.2～0.4％
All the other are Ni and impurity
6.Cr：14.5～16.5％ Mo：15.0～17.0％
W：3.0～4.5％ Fe：4.0～7.0％
Co：≤2.5％ Si：≤0.05％ Mn：≤1.0％
C：≤0.02％ V：≤0.35％
All the other are Ni and impurity.
7. according to any described composite pipe in the claim 1～5, it is characterized in that coated with resin on the outer surface of the steel pipe of above-mentioned composite pipe.
8. composite pipe according to claim 6 is characterized in that, coated with resin on the outer surface of the steel pipe of above-mentioned composite pipe.
9. according to any described composite pipe in the claim 1～5, it is characterized in that heat-resisting, the corrosion resistant metal of lining on the outer surface of the steel pipe of above-mentioned composite pipe.
10. composite pipe according to claim 6 is characterized in that, heat-resisting, the corrosion resistant metal of lining on the outer surface of the steel pipe of above-mentioned composite pipe.
11. any described composite pipe according in the claim 1～5 is characterized in that above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
12. composite pipe according to claim 6 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
13. composite pipe according to claim 7 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
14. composite pipe according to claim 8 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
15. composite pipe according to claim 9 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
16. composite pipe according to claim 10 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
17. composite pipe, it is the composite pipe that is made of following structure, described structure, be on the outer end face that constitutes by common steel tube or low alloy steel, to engage Ni base corrosion resistant alloy with internal diameter littler than the internal diameter of this outer layer pipe metallurgically, the ring of promptly forming 1 Ni base alloy, in the zone that the weld side end face by the inner face of this outer layer pipe and this ring is divided into, fill solidus temperature 1300 ℃ or the Ni base alloy that is grouped into below it and than the solidus temperature of the Ni base alloy of this ring low 150 ℃ or one-tenth more than it layer, and the structure that its welding is formed on the weld side end face of this ring and this steel pipe inner face, it is to form 2 Ni base alloy that wherein said one-tenth is grouped into, it is characterized in that, adjust to form 1 and composition 2 become to be grouped into, make aspect the corrosion resistance under same environment of Ni base alloy of the Ni base alloy of this composition 1 and this compositions 2 that this corrosion resistance of forming 1 Ni base alloy equates with the corrosion resistance of the basic alloy of Ni of this composition 2 or more than it.
18. composite pipe according to claim 17 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：15～45％ B：2.5～5.0％ Si：2.0～5.0％
C:0.2～1.5% Mo :≤20% all the other be Ni and impurity.
19. composite pipe according to claim 18 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：30～40％ B：3.0～5.0％ Si：3.0～5.0％
All the other are Ni and impurity for C:0.4～0.8% Mo:2～10%.
20. composite pipe according to claim 17 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
B：1.0～5.0％ Si：3.0～25.0％
Fe+Co：0～15％ Mo+1/2W：0～20％
C：0～1.5％ V+Nb+Ta：0～10％
Al：0～1％ Cu：0～3％
All the other are Ni and impurity.
21. composite pipe according to claim 17 is characterized in that, the composition range of the Ni base alloy of above-mentioned composition 2 is:
Cr：0～25％ B：0～1.7％ Si：6～25％
Fe+Co：0～15％ Mo+1/2W：0～20％
C：0～1.5％ V+Nb+Ta：0～10％
Al：0～1％ Cu：0～3％
All the other are Ni and impurity.
22. any described composite pipe according in the claim 17～21 is characterized in that, the Ni of above-mentioned composition 1 base alloy is a composition that is selected from following 1～6 the composition:
1.Cr：20.5～22.5％ Mo：8.0～10.0％
Fe：2.0～3.0％ Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.4～3.8%
All the other are Ni and impurity
2.Cr：20.0～22.0％ Mo：8.0～9.0％
Fe：7.0～8.0％ Ti：1.3～1.7％
Si：≤1.0％ Mn：≤1.0％
(Nb+Ta) in addition: 3.3～3.7%
All the other are Ni and impurity
3.Cr：20.5～22.5％ Mo：2.0～2.4％
Fe：29.0～31.0％ Cu：2.0～2.4％
Si：≤1.0％ Mn：≤1.0％
Ti:0.8～1.0% in addition
All the other are Ni and impurity
4.Cr：20.0～22.0％ Mo：2.0～4.0％
Fe：27.0～29.0％ Cu：1.6～2.0％
C :≤0.01% Ti:2.0～2.2% in addition
Ni：44.0％
5.Cr：15.5～17.5％ Mo：16.0～18.0％
W：3.75～5.25％ Fe：4.5～7.0％
Co：≤2.5％ Si：≤1.0％ Mn：≤1.0％
C：≤0.12％ V：0.2～0.4％
All the other are Ni and impurity
6.Cr：14.5～16.5％ Mo：15.0～17.0％
W：3.0～4.5％ Fe：4.0～7.0％
Co：2.5％ Si：≤0.05％ Mn：≤1.0％
C：≤0.02％ V：≤0.35％
All the other are Ni and impurity.
23. any described composite pipe according in the claim 17～21 is characterized in that, coated with resin on the outer surface of the steel pipe of above-mentioned composite pipe.
24. composite pipe according to claim 22 is characterized in that, coated with resin on the outer surface of the steel pipe of above-mentioned composite pipe.
25. any described composite pipe according in the claim 17～21 is characterized in that, heat-resisting, the corrosion resistant metal of lining on the outer surface of the steel pipe of above-mentioned composite pipe.
26. composite pipe according to claim 22 is characterized in that, heat-resisting, the corrosion resistant metal of lining on the outer surface of the steel pipe of above-mentioned composite pipe.
27. any described composite pipe according in the claim 17～21 is characterized in that above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
28. composite pipe according to claim 22 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
29. composite pipe according to claim 23 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
30. composite pipe according to claim 24 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
31. composite pipe according to claim 25 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
32. composite pipe according to claim 26 is characterized in that, above-mentioned composite pipe is to use in the composite pipe of crude oil oil well pipe or oil pipeline.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004348161A JP4766587B2 (en) | 2004-02-02 | 2004-12-01 | Clad pipe |
| JP348161/2004 | 2004-12-01 |
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| Publication Number | Publication Date |
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| CN1782479A CN1782479A (en) | 2006-06-07 |
| CN100436908C true CN100436908C (en) | 2008-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005100690173A Expired - Fee Related CN100436908C (en) | 2004-12-01 | 2005-04-29 | Clad pipe |
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| CN101307676B (en) * | 2007-05-15 | 2011-08-24 | 山东九环石油机械有限公司 | Renewed superhigh intensity distortion-resistant anti-corrosive oil well pipe and its process |
| JP5606994B2 (en) * | 2010-09-30 | 2014-10-15 | 株式会社神戸製鋼所 | Machine parts welded with overlay welding material and overlay welding metal |
| CN102330870A (en) * | 2011-10-07 | 2012-01-25 | 吉安锐迈管道配件有限公司 | Corrosion-resistant and anti-wear welding pipeline for ocean engineering |
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| CN107470743A (en) * | 2017-08-07 | 2017-12-15 | 豪利机械(苏州)有限公司 | The surface overlaying technique of deep-sea oil mechanical workpieces |
| CN109482843B (en) * | 2018-12-30 | 2020-05-19 | 佳木斯大学 | Bimetal cast-weld composite roller and preparation method thereof |
| CN110306080A (en) * | 2019-08-06 | 2019-10-08 | 北方工业大学 | A kind of new type corrosion resistant nickel-base alloy and its production technology |
| CN113464732B (en) * | 2020-03-30 | 2023-07-04 | 中国石油化工股份有限公司 | Metal nickel-based ceramic three-layer composite steel pipe and preparation method thereof |
| CN113969386B (en) * | 2020-10-23 | 2024-04-09 | 深圳优易材料科技有限公司 | Waste incinerator boiler tube applied to working condition at temperature lower than 400 ℃ and production method thereof |
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| JPH02203092A (en) * | 1989-01-31 | 1990-08-13 | Nippon Steel Corp | Double layer steel pipe having corrosion resistance in environment burning fuel containing v, na, s, cl |
| JPH06142948A (en) * | 1992-10-30 | 1994-05-24 | Sumitomo Metal Ind Ltd | Production of metallic double pipe |
| CN1439838A (en) * | 2003-03-20 | 2003-09-03 | 浙江大学 | Anti-pitting abrasion-resistant oil pipe and manufacture thereof |
-
2005
- 2005-04-29 CN CNB2005100690173A patent/CN100436908C/en not_active Expired - Fee Related
-
2006
- 2006-08-01 HK HK06108524.2A patent/HK1088381A1/en not_active IP Right Cessation
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5428765A (en) * | 1977-08-08 | 1979-03-03 | Usui Kokusai Sangyo Kk | Heattand corossiveeresistant double wound pipe steel |
| US4754911A (en) * | 1985-01-24 | 1988-07-05 | Turner William C | Method of manufacturing a large diameter internally clad tubular product |
| JPS61270579A (en) * | 1985-05-27 | 1986-11-29 | 古河電気工業株式会社 | Corrosion-resistant feed water copper pipe |
| CN1031594A (en) * | 1988-08-05 | 1989-03-08 | 罗建云 | The composite steel tube of fully covered plating |
| JPH02203092A (en) * | 1989-01-31 | 1990-08-13 | Nippon Steel Corp | Double layer steel pipe having corrosion resistance in environment burning fuel containing v, na, s, cl |
| JPH06142948A (en) * | 1992-10-30 | 1994-05-24 | Sumitomo Metal Ind Ltd | Production of metallic double pipe |
| CN1439838A (en) * | 2003-03-20 | 2003-09-03 | 浙江大学 | Anti-pitting abrasion-resistant oil pipe and manufacture thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1782479A (en) | 2006-06-07 |
| HK1088381A1 (en) | 2006-11-03 |
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