CN201672163U - Dual metal composite pipe with connecting ring - Google Patents
Dual metal composite pipe with connecting ring Download PDFInfo
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- CN201672163U CN201672163U CN201020221269XU CN201020221269U CN201672163U CN 201672163 U CN201672163 U CN 201672163U CN 201020221269X U CN201020221269X U CN 201020221269XU CN 201020221269 U CN201020221269 U CN 201020221269U CN 201672163 U CN201672163 U CN 201672163U
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Abstract
The utility model provides a dual metal composite pipe with the connecting rings, wherein the connecting rings are arranged on the two ends of the base pipe, a lining pipe is arranged in the base pipe, the base pipe has the same length with the lining pipe does, the outer diameter of the connecting ring is equal to that of the base pipe, the internal diameter is equal to that of the lining pipe, that is the thickness the of the connecting ring is equal to the sum of the base pipe and the lining pipe, the internal end plane of the connecting ring is welded with the external end planes of the base pipe and the lining pipe to form a radial welding ring. The dual metal composite pipe of the structure resolves the problem that the base pipe and the lining pipe are difficult to weld because of the gas and the impurity therebetween when the dual metal composite pipe of the prior art are welded, enhances the weld quality, throughly resolves the problem that the corrosion liquid or gas enters into the space between the lining pipe and the base pipe to corroding the base pipe caused by the weld quality between the lining pipe and the base pipe, prolongs the service life of the dual metal composite pipe, and reduces the production cost. The dual metal composite pipe of the utility model can be used as the conveyer pipe for conveying the corrosion liquid and gas.
Description
Technical field
The utility model belongs to the manufacturing and the welding technology field of special shape pipe, is specifically related to the edge part with the special shape of double layer material manufacturing pipe and the work that is used to weld.
Background technique
In order to prevent the metallic conduit corrosion, in metallic conduit, install the liner made from resistant material additional at present and come the protective money metal conduit, internal lining pipe is generally used Stainless Steel Tube, is prepared into composite bimetal pipe.Composite bimetal pipe technology and production development are very rapid in recent years, composite bimetal pipe has obtained wide popularization and application in fields such as oil, gas chemical industries with characteristics such as its high performance-price ratios, remarkable economic efficiency and social benefit have been obtained, the application of composite bimetal pipe has solved puzzlement chemical industry, petroleum technology field for many years effectively and has adopted the anti-corrosion weak effect of steel pipe, adopts the high technical barrier of corrosion resistant alloy pipe cost.
Composite bimetal pipe has guaranteed the mechanical property of pipeline, improved the decay resistance of pipeline, need adopt the method for welding to link up many bimetal tubes long apart from transfer oil rock gas or chemical product, the structure of point of attachment hampers the application of composite bimetal pipe always.The at present domestic manufacture method that generally adopts is that machinery is fitted, as methods such as hot extrusion, cold-drawn, cold spinnings.Owing to have the gap between metal tube and the internal lining pipe, when local etching appears in bushing pipe, Korrosionsmedium infiltrates the gap between metal tube and the internal lining pipe, will form local etching, thereby quickens the metallic conduit corrosion, causes pipe interlayer large size to separate.Under the condition of high-temperature temperature and high pressure, internal lining pipe is subjected to external pressure, unstability takes place even cause the internal lining pipe bulge, causes the accident of pipeline obstruction to take place.And machinery is when being fitted in field welding, and technical difficulty is big, the weld is accepted rate is low, directly influences the industrialization of this product.
Patent publication No. is the Chinese patent of CN101334119A, a kind of welding connecting joint of composite bimetal pipe is disclosed, but after its inside liner end soldering and sealing, there is certain distance in the inside liner two ends apart from the end of connecting head, when composite bimetal pipe welded at the scene, the weld joint was difficult to connect well with liner end soldering and sealing place, annular groove can occur, very easily cause turbulent flow and corrosion phenomenon, directly influence the welding quality of product.
The patent No. is the Chinese patent of CN201344320Y, a kind of joint that is welded to connect of composite bimetal pipe is disclosed, its inside liner end and parent tube soldering and sealing, but very easily make the soldering and sealing fusing between adapter ring and the lining when welding at the scene, gas when causing welding between the base lining flows out, increase the welding difficulty, influence welding quality.
Composite bimetal pipe connects except that scyewed joint, and most of welding manner that adopts connects, but because the thinner thickness of internal lining pipe, coupling head connection place sealing difficulty is big, poor reliability, and medium is outwards revealed easily, can cause the composite bimetal pipe damage that is corroded equally.When welding connects between composite bimetal pipe,, make its site operation difficult quality guarantee owing to relate to the welding of two kinds of metals.For this reason, composite bimetal pipe factory has also taked some measures, as turnup structure, end face soldering and sealing, pile mode such as limit in advance, reduce the difficulty of field welding, but these technological schemes solves the technical barrier of on-the-spot two kinds of metallic elements welding up hill and dale.Therefore, in the composite bimetal pipe technical field, the urgent technical problem that solves of current need provides a kind of under the prerequisite that guarantees corrosion resisting property, is convenient to the composite bimetal pipe of welding procedure.
Patent announcement number is the Chinese patent of CN2466470Y, a kind of head that is welded to connect of composite bimetal pipe is provided, under the in use many situations of metallic conduit is to pass through scyewed joint, as metallic conduit and connecting of three-way pipe be by being threaded, the oil pipe that uses in the industrial gas oil all is to be connected by threaded collar joint with sleeve pipe.Because the thinner thickness of internal lining pipe, joint connection place sealing difficulty is big, poor reliability, and medium is outwards revealed easily, can cause the composite bimetal pipe damage that is corroded equally.Under the condition of oil mining area field work, generally can only adopt welding method to connect aboveground bimetal compound pipeline.Welding relates to the connection of two kinds of metals, difficult quality guarantee under the condition at the scene between the composite bimetal pipe.For this reason, composite bimetal pipe factory has also taked some measures, as turnup structure, end face soldering and sealing, pile mode such as limit in advance, reduces the difficulty of field welding, but these technological schemes do not solve the technical problem of on-the-spot two kinds of metallic elements welding, perhaps complex process up hill and dale.But the connection of composite bimetal pipe comprises that the box cupling scyewed joint of down-hole pipe and the welding of surface duct connect, and is an insoluble technical problem.
In the composite bimetal pipe technical field, the urgent technical problem that solves of current need provide a kind ofly be convenient to weld, corrosion-resistant, the composite bimetal pipe that can carry corrosion liquid and etchant gas.
Summary of the invention
Technical problem to be solved in the utility model is to overcome the shortcoming of above-mentioned composite bimetal pipe, provides that a kind of corrosion resistance and good, wear-resisting property are good, the composite bimetal pipe of long service life, tape relay ring that the production cost is low.
Solving the problems of the technologies described above the technological scheme that is adopted is: be provided with adapter ring at the two ends of parent tube, be provided with internal lining pipe in the parent tube.The axial length of parent tube of the present utility model is identical with the axial length of internal lining pipe.The external diameter of adapter ring of the present utility model is identical with parent tube, the internal diameter of adapter ring is identical with the internal diameter of internal lining pipe, be the thickness sum that adapter ring thickness equals parent tube thickness and internal lining pipe, the interior edge face of adapter ring connects with the exterior edge face welding of parent tube and internal lining pipe, forms one and encloses radially boxing circle.
The axial length of adapter ring inner ring surface of the present utility model is 20~100mm.
The utility model adopts in the welding of the end of parent tube and internal lining pipe and connects adapter ring, the exterior edge face of adapter ring is processed with bevel for welding, when having solved the welding of existing composite bimetal pipe because of the gas that exists between parent tube and the internal lining pipe, the technical problem that impurity is difficult to weld, improved welding quality, solved up hill and dale between internal lining pipe and the parent tube because of corrosion liquid or etchant gas appear in welding quality and leaked to enter between internal lining pipe and the parent tube and corrode parent tube, prolong the working life of composite bimetal pipe, reduced operating cost.The utlity model has that simple in structure, corrosion resistance and good, wear-resisting property are good, long service life, production low cost and other advantages, can be used as the conveyance conduit of carrying corrosion liquid, etchant gas.
Description of drawings
Fig. 1 is the utility model embodiment 1 a structural representation.
Fig. 2 is the utility model embodiment 4 a structural representation.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but the utility model is not limited to these embodiments.
In Fig. 1, the composite bimetal pipe of the tape relay ring of present embodiment is by adapter ring 1, parent tube 2, internal lining pipe 3, radially boxing circle 4 connects and constitutes.
In the present embodiment, the both ends of the surface of parent tube 2 are the toroidal surface vertical with central plane, and parent tube 2 is a seamless carbon steel tube, can select arbitrarily according to purposes, also can adopt the straight weld carbon steel tube, also can adopt to be used for copper pipe that heat exchanger uses etc.In parent tube 2, adopt the detonation lining method to be compounded with internal lining pipe 3, the axial length of internal lining pipe 3 is identical with the axial length of parent tube 2, the external diameter of internal lining pipe 3 is identical with the internal diameter of parent tube 2, internal lining pipe 3 outer surfaces and parent tube 2 internal surfaces closely are connected as a single entity, and also can adopt methods such as hydraulic pressure lining, drawing lining with internal lining pipe 3 outer surfaces and compound being connected as a single entity of parent tube 2 internal surfaces.Internal lining pipe 3 adopts alloy lining steel pipe, also can adopt Stainless Steel Tube.
The interior edge face of adapter ring 1 is the toroidal surface vertical with central plane, the exterior edge face of adapter ring 1 is processed with bevel for welding, adopt friction welding to be connected with adapter ring 1 at the two ends of parent tube 2 and internal lining pipe 3, form one between two exterior edge faces of parent tube 2 and internal lining pipe 3 and adapter ring 1 interior edge face and enclose radially boxing circle 4, the internal diameter of adapter ring 1 is identical with the internal diameter of internal lining pipe 3, the external diameter of adapter ring 1 is identical with the external diameter of parent tube 2, the axial length of adapter ring 1 inner ring surface is 55mm, and the used material of the used material of preparation adapter ring 1 and internal lining pipe is identical or close.This adapter ring 1 makes that the composite bimetal pipe welding rear surface of the composite bimetal pipe of a tape relay ring and another root tape relay ring is smooth, the built-up welding phenomenon can not occur, sealing-off and gap can not occur after the welding.When having solved the welding of existing composite bimetal pipe because of the gas of existence between parent tube 2 and the internal lining pipe 3, the technical problem that impurity is difficult to weld, improved welding quality, solved up hill and dale between internal lining pipe 3 and the parent tube 2 because of corrosion liquid or etchant gas appear in welding quality and leaked to enter and corrode parent tube 2 between internal lining pipe 3 and the parent tube 2, prolong the working life of composite bimetal pipe, reduced cost of production.The utlity model has that simple in structure, corrosion resistance and good, wear-resisting property are good, long service life, production low cost and other advantages, can be used as the conveyance conduit of carrying corrosion liquid, etchant gas.
In the present embodiment, the both ends of the surface of parent tube 2 are the toroidal surface vertical with central plane, in parent tube 2, adopt the detonation lining method to be compounded with internal lining pipe 3, connecting relation between internal lining pipe 3 outer surfaces and parent tube 2 internal surfaces, also can adopt the method for hydraulic pressure lining, internal lining pipe 3 and parent tube 2 are combined with each other, and the axial length of internal lining pipe 3 is identical with the axial length of parent tube 2, and the external diameter of internal lining pipe 3 is identical with the internal diameter of parent tube 2.The interior edge face of adapter ring 1 is the toroidal surface vertical with central plane, the exterior edge face of adapter ring 1 is processed with bevel for welding, adopt friction welding to be connected with adapter ring 1 at the two ends of parent tube 2 and internal lining pipe 3, form one between two exterior edge faces of parent tube 2 and internal lining pipe 3 and adapter ring 1 interior edge face and enclose radially boxing circle 4, the internal diameter of adapter ring 1 is identical with the internal diameter of internal lining pipe 3, the external diameter of adapter ring 1 is identical with the external diameter of parent tube 2, the axial length of adapter ring 1 inner ring surface is 20mm, and the used material of the used material of preparation adapter ring 1 and internal lining pipe 3 is identical or close.The connecting relation of other component and component is identical with embodiment 1.
In the present embodiment, the both ends of the surface of parent tube 2 are the toroidal surface vertical with central plane, in parent tube 2, adopt the detonation lining method to be compounded with internal lining pipe 3, connecting relation between internal lining pipe 3 outer surfaces and parent tube 2 internal surfaces, also can adopt the method for hydraulic pressure lining, internal lining pipe 3 and parent tube 2 are combined with each other, and the axial length of internal lining pipe 3 is identical with the axial length of parent tube 2, and the external diameter of internal lining pipe 3 is identical with the internal diameter of parent tube 2.The interior edge face of adapter ring 1 is the toroidal surface vertical with central plane, the exterior edge face of adapter ring 1 is processed with bevel for welding, adopt friction welding to be connected with adapter ring 1 at the two ends of parent tube 2 and internal lining pipe 3, form one between two exterior edge faces of parent tube 2 and internal lining pipe 3 and adapter ring 1 interior edge face and enclose radially boxing circle 4, the internal diameter of adapter ring 1 is identical with the internal diameter of internal lining pipe 3, the external diameter of adapter ring 1 is identical with the external diameter of parent tube 2, the axial length of adapter ring 1 inner ring surface is 100mm, and the used material of the used material of preparation adapter ring 1 and internal lining pipe 3 is identical or close.The annexation of other component and component is identical with embodiment 1.
In Fig. 2, in parent tube 2, adopt the detonation lining method to be compounded with internal lining pipe 3, the connecting relation between internal lining pipe 3 outer surfaces and parent tube 2 internal surfaces also can adopt the method for hydraulic pressure lining, and internal lining pipe 3 and parent tube 2 are combined with each other.The both ends of the surface of the both ends of the surface of parent tube 2 and adapter ring 1 are processed with bevel for welding, the two ends of parent tube 2 and internal lining pipe 3 adopt the argon arc welding method to connect with adapter ring 1 welding, form one between two exterior edge faces of parent tube 2 and internal lining pipe 3 and adapter ring 1 interior edge face and enclose radially boxing circle 4, the internal diameter of adapter ring 1 is identical with the internal diameter of internal lining pipe 3, the external diameter of adapter ring 1 is identical with the external diameter of parent tube 2, the axial length of adapter ring 1 inner ring surface is 55mm, and the used material of the used material of preparation adapter ring 1 and internal lining pipe 3 is identical or close.The annexation of other component and component is identical with embodiment 1.
Embodiment 5
In Fig. 2, in parent tube 2, adopt the detonation lining method to be compounded with internal lining pipe 3, the connecting relation between internal lining pipe 3 outer surfaces and parent tube 2 internal surfaces also can adopt the method for hydraulic pressure lining, and internal lining pipe 3 and parent tube 2 are combined with each other.The both ends of the surface of the both ends of the surface of parent tube 2 and adapter ring 1 are processed with bevel for welding, the two ends of parent tube 2 and internal lining pipe 3 adopt the argon arc welding method to connect with adapter ring 1 welding, form one between two exterior edge faces of parent tube 2 and internal lining pipe 3 and adapter ring 1 interior edge face and enclose radially boxing circle 4, the internal diameter of adapter ring 1 is identical with the internal diameter of internal lining pipe 3, the external diameter of adapter ring 1 is identical with the external diameter of parent tube 2, the axial length of adapter ring 1 inner ring surface is 20mm, and the used material of the used material of preparation adapter ring 1 and internal lining pipe 3 is identical or close.The annexation of other component and component is identical with embodiment 1.
Embodiment 6
In Fig. 2, in parent tube 2, adopt the detonation lining method to be compounded with internal lining pipe 3, the connecting relation between internal lining pipe 3 outer surfaces and parent tube 2 internal surfaces also can adopt the method for hydraulic pressure lining, and internal lining pipe 3 and parent tube 2 are combined with each other.The both ends of the surface of the both ends of the surface of parent tube 2 and adapter ring 1 are processed with bevel for welding, adopt the welding of argon arc welding connection to be connected with adapter ring 1 at the two ends of parent tube 2 and internal lining pipe 3, form one between two exterior edge faces of parent tube 2 and internal lining pipe 3 and adapter ring 1 interior edge face and enclose radially boxing circle 4, the internal diameter of adapter ring 1 is identical with the internal diameter of internal lining pipe 3, the external diameter of adapter ring 1 is identical with the external diameter of parent tube 2, the axial length of adapter ring 1 inner ring surface is 100mm, and the used material of the used material of preparation adapter ring 1 and internal lining pipe 3 is identical or close.The annexation of other component and component is identical with embodiment 1.
In order to verify the beneficial effects of the utility model, the inventor adopts the composite bimetal pipe of the tape relay ring of the utility model embodiment 1 and embodiment's 4 structures to test, and test case is as follows:
Test instrument: the material property testing machine, model is: WAW-300DJ, think carefully that by Shenzhen Science and Technology Co., Ltd. produces in length and breadth; Hydraulic press, model is: 200t Φ 60~Φ 273 steel pipe hydrostatic testers, produce by Sanming City, Shanxi heavy industry machine-building Co., Ltd; X ray detector, model are SITE-XS DS 2004, are produced by Belgian ICM; Elemental analyser, model are XH-722, are produced by production Nanjing merit China Analytical Instrument Co., Ltd.
Specimen: the composite bimetal pipe of embodiment's 1 tape relay ring (being called for short embodiment's 1 composite bimetal pipe), the composite bimetal pipe of embodiment's 4 tape relay rings (being called for short embodiment's 4 composite bimetal pipes).
Material: make No. 20 steel of material of parent tube 2, the material of making internal lining pipe 3 is 304 stainless steels, and the material of making adapter ring 1 is 304 stainless steels.
Specification: Φ 48mm * (thickness of parent tube 2 is 5mm, and the thickness of internal lining pipe 3 is 0.6mm).
1, mechanical property test
Tensile property: 2 samples of the composite bimetal pipe of embodiment's 1 tape relay ring, 2 samples of the composite bimetal pipe of embodiment's 4 tape relay rings.According to JB/T 4251-1999 " friction welding ", SY/T 4103-2006 " steel pipe welding and examination ", adopt the material property testing machine that embodiment's 1 composite bimetal pipe, embodiment's 4 composite bimetal pipe welding part weld seams are carried out Erichsen test, test result sees Table 1.
Bending properties test: about the bead bend test requirement, the welding part weld seam of embodiment's 1 composite bimetal pipe, each 2 sample of embodiment's 4 composite bimetal pipes is carried out the curved and curved 180 ° of bending propertieies test of the back of the body of face according to SY/T 4103-2006 " steel pipe welding and check and accept " standard.Test result sees Table 1.
Table 1 embodiment 1 composite bimetal pipe and embodiment's 4 composite bimetal pipe tensile properties and bending properties test
By table 1 as seen, according to GB/T 8163-2008 " carry and use seamless steel pipe ", GB/T 14976-2002 " FLUID TRANSPORTATION stainless-steel seamless pipe " and SY/T 4103-2006 " steel pipe welding and examination " requirement of strength, the requirement of weld seam tensile strength overgauge minimum intensity, the bending properties test reaches SY/T 4103-2006 " steel pipe welding and examination " requirement, and is all qualified.
2, test internal lining pipe 3 and the radially Chemical composition of boxing circle 4
Adopt the Chemical composition of elemental analyser test internal lining pipe 3 materials, test result sees Table 2.
The chemical composition of table 2 internal lining pipe 3
The chemical composition standard of wlding is ANSI/AWS A5.9-1993, and the material model of wlding is ER309L, adopts the elemental analyser test wlding and the chemical composition of boxing circle 4 radially, and test result sees Table 3.
Table 3 wlding and the Chemical composition of boxing circle 4 radially
By table 2,3 as seen, radially the Chemical composition Cr of boxing circle 4, Ni content can guarantee that greater than the Cr in internal lining pipe 3 materials, Ni content radially the corrosion resisting property of boxing circle 4 is not less than internal lining pipe 3.
3, X ray detects
With X ray detector embodiment's 1 composite bimetal pipe and each radially boxing circle 4 of 2 of embodiment's 4 composite bimetal pipes have been carried out non-destructive inspection according to JB/T 4730.2-2005 " bearing device non-destructive inspection " second portion radiographic inspection standard, testing result sees Table 3.
Table 3X radiographic inspection is boxing circle 4 testing result tables radially
X-ray inspection | Embodiment's 1 composite bimetal pipe | Embodiment's 4 composite bimetal pipes |
Operative norm | JB/T?4730.2-2005 | JB/T?4730.2-2005 |
The sample number of |
2 | 2 |
X image sheet number | 8 | 8 |
I level X image sheet number | 8 | 8 |
Annotate: I level X image sheet is not for to allowing to exist crackle, incomplete fusion, lack of penetration, folder copper and bar defect in the boxing circle 4 radially.II level and III level X image sheet be not for allowing to exist crackle, incomplete fusion, lack of penetration, folder copper defective.
By table 3 as seen, 2 samples of embodiment's 1 composite bimetal pipe, 8 X image sheets of 2 samples of embodiment's 4 composite bimetal pipes reach the I grade standard, and radially boxing circle 4 is qualified.
4, hydrostatics testing
According to SY/T 6623-2005 " in cover or lining corrosion resisting alloy composite steel tube standard " standard, adopt hydrostatic testing machine that embodiment's 1 composite bimetal pipe, each 3 of embodiment's 4 composite bimetal pipes are suppressed detection, parent tube 2 materials of two kinds of composite bimetal pipes are that 20# steel, external diameter φ 48mm, thickness of pipe wall are 5mm, internal lining pipe 3 materials are that 304# steel, external diameter φ 48, thickness of pipe wall are 0.6mm, it is 38.28Mpa that this composite pipe of theoretical calculation bears pressure, should not surpass 20.7Mpa according to above-mentioned code test pressure, be calculated as follows test pressure:
P is hydrostatics testing pressure (Kpa) in the formula, and S is a circumference stress, and its numerical value equals different size parent tube 2 SMYSs and multiply by corresponding percentage (Mpa), and t is regulation wall thickness (mm), and D is predetermined outside diameter (mm); Above-mentioned parameter is:
S=245×75%=183.75Mpa;
T is 5mm; D is 48mm; Above-mentioned parameter substitution hydrostatics testing formula is got:
P=38.28Mpa。
Test and result of calculation see Table 4.
Table 4 embodiment 1 composite bimetal pipe and embodiment's 4 composite bimetal pipe hydrostatic tests
By table 4 as seen, calculating the test pressure value is 38.28Mpa, and when pressing the standard-required maximum pressure above 20.7Mpa, the highest pressure testing value is that 20.7MPa gets final product, and through test, satisfies standard-required, and radially 4 hydrostatics testings of boxing circle are qualified.
Claims (2)
1. the composite bimetal pipe of a tape relay ring is provided with adapter ring (1) at the two ends of parent tube (2), is provided with internal lining pipe (3) in the parent tube (2), it is characterized in that: the axial length of said base (2) is identical with the axial length of internal lining pipe (3); The external diameter of said adapter ring (1) is identical with parent tube (2), the internal diameter of adapter ring (1) is identical with the internal diameter of internal lining pipe (3), it is the thickness sum that adapter ring (1) thickness equals parent tube (2) thickness and internal lining pipe (3), the interior edge face of adapter ring (1) connects with the exterior edge face welding of parent tube (2) and internal lining pipe (3), forms one and encloses radially boxing circle (4).
2. according to the composite bimetal pipe of the described tape relay ring of claim 1, it is characterized in that: the axial length of said adapter ring (1) inner ring surface is 20~100mm.
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101865334A (en) * | 2010-06-10 | 2010-10-20 | 西安向阳航天材料股份有限公司 | Bimetal compound pipe with adapter rings |
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2010
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN101865334A (en) * | 2010-06-10 | 2010-10-20 | 西安向阳航天材料股份有限公司 | Bimetal compound pipe with adapter rings |
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