CN102172626A - Hot rolling production method for super 13Cr oil pipes with diameter of 48 to 89 millimeters - Google Patents
Hot rolling production method for super 13Cr oil pipes with diameter of 48 to 89 millimeters Download PDFInfo
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Abstract
The invention provides a hot rolling production method for super 13Cr oil pipes with a diameter of 48 to 89 millimeters, which comprises the following steps: selecting models and fixing sizes of pipe blanks; feeding the pipe blanks into an annular furnace and heating; continuously rolling; heating in a heating furnace, and performing stretch diameter reduction; and obtaining finished products which have the following performance indexes: the yield strength is 758 to 965MPa, the tensile strength is more than or equal to 862MPa, the coefficient of elongation is more than or equal to 14 percent, the hardness is less than or equal to 32HRC, and the grain size meets grade-6 standards in American Society for Testing Material (ASTM) Standard. The oil pipes do not crack when tested in a flattening test, and the performance indexes of the oil pipes corroded by a pure CO2 corrosive medium still meet stands. The invention has the advantage that when the method is used for producing the super 13Cr oil pipes with a diameter of 48 to 89 millimeters, the rejection rate is small, the qualification rate under first acceptance check is over 96 percent, the quality of the hot rolled oil pipes is high, the hot rolling production rhythm is improved to 30 seconds, and the production efficiency of the super 13Cr oil pipes with a diameter of 48 to 89 millimeters is improved greatly.
Description
Technical field
The invention belongs to steel pipe rolling technology in the metallurgical industry field, particularly a kind of at CO
2Corrosive environment is the hot rolling production method of the super 13Cr oil pipe of φ 48-89mm that use, that rolling difficulty is higher down.
Background technology
Along with energy demand increases, production of hydrocarbons producer begins to turn to the comparatively abominable oil field and the natural gas well of exploitation corrosive environment.Oil-gas mining is faced with " three height " severe rugged environment of HTHP, peracidity, high risk.The carbon steel and low alloy steel steel pipe that past generally uses is difficult to guarantee enough corrosion resistances.Experiment showed, and in material, add the Cr element, can effectively improve the anti-CO of metal material
2Corrosive nature, 13Cr martensitic stain less steel tubing has anti-preferably CO under 150 ℃
2Corrosive power.In the 13Cr martensitic stain less steel,, make it at CO by adding nickel element and molybdenum element
2Have good anti-spot corrosion and anti-homogeneous corrosion performance in the environment.External with nickeliferous 5%, the 13Cr martensitic stain less steel that contains molybdenum about 2% is called SUP13Cr, domestic steel industry is referred to as super 13Cr, different enterprises are in conjunction with self product system, give more detailed enterprise numbering title for it again, wherein the super 13Cr steel grade of Tianjin Steel Tube Group Co., Ltd's exploitation is called TP110-SUP13Cr.
Super 13Cr belongs to martensitic stain less steel, and the pipe non-deformability of super 13Cr material is big, and operation roll-forces such as perforation, tandem rolling, stretch reducing all are higher than common material, and hot rolling production difficulty is bigger.Traditional hot finished steel pipe production technology is difficult to guarantee the rolling quality and the rolling efficiency of super 13Cr tubing.
External Japan successfully develops super 13Cr steel at first, uses structural member that this material manufactures and designs, tubing etc. to use more and more widely.Domestic Tianjin Steel Tube Group Co., Ltd, Baoshan Iron and Steel Company Group Plc, climb the technical capability that Chengdu Iron And Steel Co., Ltd of steel group etc. all possesses rolling super 13Cr tubing, homemade super 13Cr tubing has passed through multinomial anticorrosive evaluation experimental, and is applied in some engineering project.But the super 13Cr material tubing that domestic hot rolling is produced generally all is the bigger seamless steel pipe of external diameter specification, has deficiency and defective aspect rolling quality, the rolling lumber recovery.For the super 13Cr material oil pipe of φ 48-89mm external diameter specification, still there is not the comparatively successful rolling experience of homemade super 13Cr oil pipe.How seeking reasonable, feasible, the super 13Cr oil pipe of φ 48-89mm hot rolling production technology efficiently, is the emphasis that all seamless steel pipe manufacturing enterprises researchs are explored.
The state-of-the-art rolling tube equipment of current hot rolled seamless steel tube industry is three roller retained mandrel tandem rolling tube machines, is called for short PQF tandem rolling tube machine (Premium Quality Finishing).Tianjin Steel Tube Group Co., Ltd built the first cover PQF continuous rolling-tube unit in the world of going into operation in 2003, be used for rolling diameter≤168.3mm seamless steel pipe, at two roller tandem rolling tube machines and the roller trio skew rolling pipe machine before aspect rolling accuracy, the rolling efficiency, the improvement raising is arranged all.
Summary of the invention
For solving the problem that exists in the above-mentioned technology, the purpose of this invention is to provide the hot-rolling method of the super 13Cr oil pipe of a kind of φ 48-89mm, be beneficial to capture the problem of the super 13Cr material of hot rolling φ 48-89mm tubing deformation, steel bonding.Improve lumber recovery,, reduce production costs to satisfy the needs in market.
For achieving the above object, technical solution of the present invention provides the hot rolling production method of the super 13Cr oil pipe of a kind of φ 48-89mm, and this method includes following steps:
(1). pipe type selecting and scale
Select super 13Cr material for use, selected cross section specification φ 145-155mm, disc column are forged pipe; The pipe scale is determined mode: according to the single theoretical weight of rolling target oil pipe, multiply by rolling multiple length and count 2-8, add the thermal losses weight and the crop end weight of pipe in the hot rolling production process, obtain every pipe theoretical weight, calculate the cut lengths that feeds intake of selected cross section specification pipe with this weight; The ordinary carbon steel material pipe of quantity such as preparation simultaneously, same specification;
(2). annular furnace charging and heating
The super 13Cr oil pipe of φ 48-89mm adopts when producing and mixes charging method, super 13Cr material pipe and ordinary carbon steel material pipe mixing shove charge cloth, going on the stove track, the pipe of step (1) being got ready by clamp heats by propping up the annular furnace of packing into, adorn 6 super 13Cr material pipes earlier, an empty step annular furnace material level, refill 6 ordinary carbon steel material pipes, an empty again step annular furnace material level, refill 6 super 13Cr material pipes, an empty again step annular furnace material level refills 6 ordinary carbon steel material pipes, the rest may be inferred, up to the pipe that step (1) is got ready the annular furnace of all packing into;
Annular furnace adds thermal recovery six district's temperature and adds thermal control, heating fuel uses natural gas, by the annular furnace console, set the annular furnace temperature: district setting is not lighted, two district temperature 1040-1080 ℃, three district temperature 1120-1150 ℃, four district temperature 1180-1200 ℃, five district temperature 1220-1260 ℃, six district temperature 1220-1280 ℃, pipe is 2.5-3.5 hour in the heating total time in six districts of annular furnace, and the pipe tapping temperature is controlled at 1220-1280 ℃;
(3). perforation
Pipe roll piercing after using the cone-type piercer machine with annular furnace heating in the step (2), be rolled into hollow billet, the cone-type piercer machine uses the cobalt that contains of diameter≤140mm to come directly towards during perforation, by the perforation console, call punch roll spacing, lead, top head front-extending quantity, motor speed, roll off angular dimensions under the different rolling specs that console set, reduction ratio is 6.0-8.0% before the top that guarantees to locate the top, adjust the eject position of punch godet cooling water, the pipe that makes cooling water aim at godet screws in godet one side, sets cooling water pressure 5-8bar;
(4). tandem rolling
Use high accuracy PQF three roller retained mandrel tandem rolling tube machine rolling tube equipments, the hollow billet that step (3) is obtained is rolled into external diameter φ 143.8mm specification hollow forging, wall thickness value according to the target oil pipe, select 6 of different size plugs for use, according to grade of steel is that bullet variable coefficient more than 7 calculates setup parameter, tandem rolling muzzle velocity 0.6-0.8m/s finishes the hot continuous rolling process;
(5). reheating furnace heating and stretch reducing
The hollow forging that is obtained by step (4) adopts the reheating furnace post bake, and reheating furnace is set 930-980 ℃ of tapping temperature, adopts 30-40 steady and continuous second discharge method to carry out follow-up stretch reducing;
The hollow forging that use multimachine frame stretch-reducing mill will go out behind the reheating furnace is rolled into the target oil pipe, according to hollow forging specification and target oil pipe specification, select the stretch reducing frame of different size for use, oil pipe specification after the stretch reducing is target oil pipe specification, need not following process, rolling super 13Cr target oil pipe and ordinary carbon steel structural tube or the fluid hose of finishing, double cloth on cold bed, and carry out separator;
(6). the performance indications that final products reached
The performance indications of using the super 13Cr oil pipe of φ 48-89mm of this case hot rolling technology Rolling Production to reach: yield strength 758-965MPa, tensile strength 〉=862MPa, percentage elongation 〉=14%, hardness≤32HRC, grain size meets 6 grade standards in the ASTM standard, oil pipe crack-free during flattening test test simultaneously, pure CO
2Corrosive medium down test after 7 days performance still satisfy above-mentioned performance indications.
Effect of the present invention is to adopt the super 13Cr oil pipe of the φ 48-89mm direct heat roll process method of this method, rejection number is few in the middle of the oil pipe of being produced, first-time qualification rate reaches more than 96%, hot rolling oil pipe product quality height, the rhythm of production of hot rolling is simultaneously brought up to 30 seconds, has improved the production efficiency of the super 13Cr oil pipe of φ 48-89mm greatly.
The specific embodiment
Direct heat rolling method to the super 13Cr oil pipe of a kind of φ 73.02*5.51mm specification of the present invention is illustrated in conjunction with the embodiments.
The hot rolling production method of the super 13Cr oil pipe of φ 48-89mm of the present invention, this method includes following steps:
(1). pipe type selecting and scale
Select super 13Cr material for use, selected cross section specification φ 145-155mm, disc column are forged pipe; The pipe scale is determined mode: according to the single theoretical weight of rolling target oil pipe, multiply by rolling multiple length and count 2-8, add the thermal losses weight and the crop end weight of pipe in the hot rolling production process, obtain every pipe theoretical weight, calculate the cut lengths that feeds intake of selected cross section specification pipe with this weight; The ordinary carbon steel material pipe of quantity such as preparation simultaneously, same specification;
(2). annular furnace charging and heating
The super 13Cr oil pipe of φ 48-89mm adopts when producing and mixes charging method, super 13Cr material pipe and ordinary carbon steel material pipe mixing shove charge cloth, going on the stove track, the pipe of step (1) being got ready by clamp heats by propping up the annular furnace of packing into, adorn 6 super 13Cr material pipes earlier, an empty step annular furnace material level, refill 6 ordinary carbon steel material pipes, an empty again step annular furnace material level, refill 6 super 13Cr material pipes, an empty again step annular furnace material level refills 6 ordinary carbon steel material pipes, the rest may be inferred, up to the pipe that step (1) is got ready the annular furnace of all packing into;
Annular furnace adds thermal recovery six district's temperature and adds thermal control, heating fuel uses natural gas, by the annular furnace console, set the annular furnace temperature: district setting is not lighted, two district temperature 1040-1080 ℃, three district temperature 1120-1150 ℃, four district temperature 1180-1200 ℃, five district temperature 1220-1260 ℃, six district temperature 1220-1280 ℃, pipe is 2.5-3.5 hour in the heating total time in six districts of annular furnace, and the pipe tapping temperature is controlled at 1220-1280 ℃;
(3). perforation
Pipe roll piercing after using the cone-type piercer machine with annular furnace heating in the step (2), be rolled into hollow billet, the cone-type piercer machine uses the cobalt that contains of diameter≤140mm to come directly towards during perforation, by the perforation console, call punch roll spacing, lead, top head front-extending quantity, motor speed, roll off angular dimensions under the different rolling specs that console set, reduction ratio is 6.0-8.0% before the top that guarantees to locate the top, adjust the eject position of punch godet cooling water, the pipe that makes cooling water aim at godet screws in godet one side, sets cooling water pressure 5-8bar;
(4). tandem rolling
Use high accuracy PQF three roller retained mandrel tandem rolling tube machine rolling tube equipments, the hollow billet that step (3) is obtained is rolled into external diameter φ 143.8mm specification hollow forging, wall thickness value according to the target oil pipe, select 6 of different size plugs for use, according to grade of steel is that bullet variable coefficient more than 7 calculates setup parameter, tandem rolling muzzle velocity 0.6-0.8m/s finishes the hot continuous rolling process;
(5). reheating furnace heating and stretch reducing
The hollow forging that is obtained by step (4) adopts the reheating furnace post bake, and reheating furnace is set 930-980 ℃ of tapping temperature, adopts 30-40 steady and continuous second discharge method to carry out follow-up stretch reducing;
The hollow forging that use multimachine frame stretch-reducing mill will go out behind the reheating furnace is rolled into the target oil pipe, according to hollow forging specification and target oil pipe specification, select the stretch reducing frame of different size for use, oil pipe specification after the stretch reducing is target oil pipe specification, need not following process, rolling super 13Cr target oil pipe and ordinary carbon steel structural tube or the fluid hose of finishing, double cloth on cold bed, and carry out separator;
(6). the performance indications that final products reached
The performance indications of using the super 13Cr oil pipe of φ 48-89mm of this case hot rolling technology Rolling Production to reach: yield strength 758-965MPa, tensile strength 〉=862MPa, percentage elongation 〉=14%, hardness≤32HRC, grain size meets 6 grade standards in the ASTM standard, oil pipe crack-free during flattening test test simultaneously, pure CO2 corrosive medium down test after 7 days performance still satisfy above-mentioned performance indications.
The hot rolling production method implementation procedure of the super 13Cr oil pipe of φ 48-89mm of the present invention is an example with hot rolling φ 73.02*5.51mm oil pipe:
Adopt the TP110-SUP13Cr steel grade to smelt pipe, this steel grade is the numbering title of Tianjin steel pipe group internal to super 13Cr steel grade, and concrete production technology is:
1. pipe type selecting and scale technology
Select for use the TP110-SUP13Cr material to forge pipe.With fast forging of 4.3 tons of ingot castings is φ 165mm, is the disc column pipe of cross section specification φ 150mm with mechanical reconditioning, pipe scale 2500mm, and center positioning hole is not done in the pipe end.The pipe plan Rolling Production that feeds intake is the triple scale target oil pipe of 10.5-11.3 rice.No. 45 steel matter pipes of quantity such as preparation simultaneously, same specification.
2. annular furnace charging and heating
Be balanced production, alleviate the equipment draught pressure, adopt during this batch TP110-SUP13Cr material steel pipe's production and mix charging, interspersed rolling technology mode.Ready TP110-SUP13Cr material scale pipe that is used for Rolling Production and ordinary carbon steel material pipe in the step 1 alternately thrown in for per six one group going into the stove track, by clamp by packing annular furnace into.TP110-SUP13Cr material pipe and ordinary carbon steel material pipe mixing shove charge cloth, promptly adorn 6 TP110-SUP13Cr material pipes earlier, an empty step annular furnace material level, refill 6 ordinary carbon steel material pipes, an empty again step annular furnace material level refills 6 TP110-SUP13Cr material pipes, an empty again step annular furnace material level, refill 6 ordinary carbon steel material pipes, the rest may be inferred, up to annular furnace that ready two kinds of pipes are all packed into.Another purpose of mixing cloth is to prevent that steel bonding appears in mandrel surface when being out of shape for the second time.
Annular furnace adds thermal recovery six district's temperature and adds thermal control, heating fuel uses natural gas, pipe is 2.5-3 hour in the heating total time in six districts of annular furnace, by the annular furnace console, set district's natural gas not point, 1050 ℃ of two district's temperature, 1140 ℃ of three district's temperature, 1180 ℃ of four district's temperature, 1220 ℃ of five district's temperature, 1220 ℃ of six district's temperature, the control tapping temperature is 1220 ℃.
3. piercing process
In the hot rolled seamless steel tube production process, thermal deformation for the first time is at perforation process.Use the cone-type piercer machine with the pipe roll piercing that goes out in the step 2 behind the annular furnace, be rolled into hollow billet.Use φ 130mm to contain the cobalt top during perforation, φ 125mm push rod, φ 145mm keeps off fork, and call simultaneously and set roll spacing 129.5mm, lead 150mm, top head front-extending quantity 42mm, 11.5 ° of rolling angles are 6.5-7% with reduction ratio before the top that guarantees the place, top.Perforation back capillary outer diameter φ 178mm, wall thickness 13.5mm.Adjust the eject position of punch godet cooling water, the pipe that makes cooling water aim at godet screws in godet one side, sets cooling water pressure 6bar.
4. continuous rolling process
In the hot finished steel pipe production process, thermal deformation for the second time is in the tandem rolling operation.Use 5 frame high accuracy PQF, three roller retained mandrel tandem rolling tube machine rolling tube equipments, the hollow billet that obtains in the step 3 is rolled into hollow forging,, plug is separated with hollow forging again through 3 winding arbor extraction presses.Use φ 137.7mm size mandril when rolling, use 6 plug circulations rolling altogether, set tandem rolling muzzle velocity 0.8m/s when rolling, finish continuous rolling process.The hollow forging specification is φ 143.8*5.95mm behind the tandem rolling.
5. reheating furnace technology and stretch reducing technology
In the hot finished steel pipe production process, thermal deformation is in operation for the third time.
For the initial temperature that guarantees hollow forging in the stretch reducing operation is even, and then guarantees to open and subtract back oil pipe quality and stable performance, the hollow forging that is obtained by step 4 adopts reheating furnace post bake production technology.Reheating furnace is set 980 ℃ of tapping temperatures, adopts 30 seconds steady and continuous discharge methods to carry out follow-up stretch reducing.
The hollow forging that uses 24 frame stretch-reducing mills will go out behind the reheating furnace is rolled into the target oil pipe.Use the stretch reducing frame of φ 143.8mm-＞φ 73.02mm specification, about 36.63 meters of stretch reducing console control finish to gauge length.The specification of oil pipe was φ 73.02*5.51mm after hot rolling was opened and subtracted, and need not following process.After feeding intake, ordinary carbon steel material pipe is rolled into φ 73.00*5.50mm structural tube.After the stretch reducing operation, TP110-SUP13Cr material oil pipe and ordinary carbon steel material-structure pipe use blue paint sign at the double cloth of cold bed.
6. performance indications that final products reached
By using the TP110-SUP13Cr material φ 73.00*5.50mm oil pipe of the hot rolling technology method Rolling Production that this case introduces, its yield strength 〉=820MPa, tensile strength 〉=910MPa, percentage elongation 19-22%, hardness 29-31HRC, grain size 8.0-8.5 meets 6 grade standards in the ASTM standard, the test of sampling flattening test and the anti-CO that carry out in the Tianjin Steel Tube Group Co., Ltd technique center simultaneously
2In the corrosion test test, 72.37% o'clock oil pipe crack-free, pure CO are measured in flattening
2Corrosive medium down test after 7 days performance still satisfy above-mentioned every performance indications.
Facts have proved that the rolling super 13Cr oil pipe of φ 48-89mm of production technology that adopts this case to introduce, its mechanical property, corrosion resistance be all by every evaluation experimental, and at " the CO of Erdos coal system oil content company of China Shenhua Coal to Liquid and Chemical Co., Ltd.
2Collect and seal 100,000 tons of demonstration wells up for safekeeping " successful Application in the project.
Claims (1)
1. the hot rolling production method of the super 13Cr oil pipe of φ 48-89mm, this method includes following steps:
(1). pipe type selecting and scale
Select super 13Cr material for use, selected cross section specification φ 145-155mm, disc column are forged pipe; The pipe scale is determined mode: according to the single theoretical weight of rolling target oil pipe, multiply by rolling multiple length and count 2-8, add the thermal losses weight and the crop end weight of pipe in the hot rolling production process, obtain every pipe theoretical weight, calculate the cut lengths that feeds intake of selected cross section specification pipe with this weight; The ordinary carbon steel material pipe of quantity such as preparation simultaneously, same specification;
(2). annular furnace charging and heating
The super 13Cr oil pipe of φ 48-89mm adopts when producing and mixes charging method, super 13Cr material pipe and ordinary carbon steel material pipe mixing shove charge cloth, going on the stove track, the pipe of step (1) being got ready by clamp heats by propping up the annular furnace of packing into, adorn 6 super 13Cr material pipes earlier, an empty step annular furnace material level, refill 6 ordinary carbon steel material pipes, an empty again step annular furnace material level, refill 6 super 13Cr material pipes, an empty again step annular furnace material level refills 6 ordinary carbon steel material pipes, the rest may be inferred, up to the pipe that step (1) is got ready the annular furnace of all packing into;
Annular furnace adds thermal recovery six district's temperature and adds thermal control, heating fuel uses natural gas, by the annular furnace console, set the annular furnace temperature: district setting is not lighted, two district temperature 1040-1080 ℃, three district temperature 1120-1150 ℃, four district temperature 1180-1200 ℃, five district temperature 1220-1260 ℃, six district temperature 1220-1280 ℃, pipe is 2.5-3.5 hour in the heating total time in six districts of annular furnace, and the pipe tapping temperature is controlled at 1220-1280 ℃;
(3). perforation
Pipe roll piercing after using the cone-type piercer machine with annular furnace heating in the step (2), be rolled into hollow billet, the cone-type piercer machine uses the cobalt that contains of diameter≤140mm to come directly towards during perforation, by the perforation console, call punch roll spacing, lead, top head front-extending quantity, motor speed, roll off angular dimensions under the different rolling specs that console set, reduction ratio is 6.0-8.0% before the top that guarantees to locate the top, adjust the eject position of punch godet cooling water, the pipe that makes cooling water aim at godet screws in godet one side, sets cooling water pressure 5-8bar;
(4). tandem rolling
Use high accuracy PQF three roller retained mandrel tandem rolling tube machine rolling tube equipments, the hollow billet that step (3) is obtained is rolled into external diameter φ 143.8mm specification hollow forging, wall thickness value according to the target oil pipe, select 6 of different size plugs for use, according to grade of steel is that bullet variable coefficient more than 7 calculates setup parameter, tandem rolling muzzle velocity 0.6-0.8m/s finishes the hot continuous rolling process;
(5). reheating furnace heating and stretch reducing
The hollow forging that is obtained by step (4) adopts the reheating furnace post bake, and reheating furnace is set 930-980 ℃ of tapping temperature, adopts 30-40 steady and continuous second discharge method to carry out follow-up stretch reducing;
The hollow forging that use multimachine frame stretch-reducing mill will go out behind the reheating furnace is rolled into the target oil pipe, according to hollow forging specification and target oil pipe specification, select the stretch reducing frame of different size for use, oil pipe specification after the stretch reducing is target oil pipe specification, need not following process, rolling super 13Cr target oil pipe and ordinary carbon steel structural tube or the fluid hose of finishing, double cloth on cold bed, and carry out separator;
(6). the performance indications that final products reached
The performance indications of using the super 13Cr oil pipe of φ 48-89mm of this case hot rolling technology Rolling Production to reach: yield strength 758-965MPa, tensile strength 〉=862MPa, percentage elongation 〉=14%, hardness≤32HRC, grain size meets 6 grade standards in the ASTM standard, oil pipe crack-free during flattening test test simultaneously, pure CO
2Corrosive medium down test after 7 days performance still satisfy above-mentioned performance indications.
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| CN104148406A (en) * | 2014-08-15 | 2014-11-19 | 内蒙古包钢钢联股份有限公司 | Double-length flying shear optimal shearing method |
| CN103394868B (en) * | 2013-07-11 | 2016-05-04 | 天津钢管集团股份有限公司 | A kind of manufacture method of titanium alloy hoop material |
| CN105855293A (en) * | 2016-04-05 | 2016-08-17 | 攀钢集团成都钢钒有限公司 | Production method for super 13Cr oil tube |
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| US11162150B2 (en) | 2013-04-19 | 2021-11-02 | Baoshan Iron & Steel Co., Ltd. | Method for manufacturing superior 13Cr tool coupler |
| CN103394868B (en) * | 2013-07-11 | 2016-05-04 | 天津钢管集团股份有限公司 | A kind of manufacture method of titanium alloy hoop material |
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| CN105855293A (en) * | 2016-04-05 | 2016-08-17 | 攀钢集团成都钢钒有限公司 | Production method for super 13Cr oil tube |
| CN107142371A (en) * | 2017-03-31 | 2017-09-08 | 河钢股份有限公司承德分公司 | One kind is used for heater for rolling steel distributing method |
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| CN102172626B (en) | 2012-07-25 |
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Effective date of registration: 20190624 Address after: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Patentee after: Tianjin Steel Tube Manufacturing Co., Ltd. Address before: No. 396 Jintang Highway, Dongli District, Tianjin 300301 Patentee before: Tianjin Steel Pipe Group Co., Ltd. |