CN112222218A - Production process and device of stainless steel seamless steel pipe for household small-aperture fluid delivery - Google Patents
Production process and device of stainless steel seamless steel pipe for household small-aperture fluid delivery Download PDFInfo
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- CN112222218A CN112222218A CN202010995482.4A CN202010995482A CN112222218A CN 112222218 A CN112222218 A CN 112222218A CN 202010995482 A CN202010995482 A CN 202010995482A CN 112222218 A CN112222218 A CN 112222218A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 61
- 239000010959 steel Substances 0.000 title claims abstract description 61
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 24
- 239000010935 stainless steel Substances 0.000 title claims abstract description 24
- 239000012530 fluid Substances 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 238000005238 degreasing Methods 0.000 claims abstract description 45
- 238000005406 washing Methods 0.000 claims abstract description 45
- 238000005554 pickling Methods 0.000 claims abstract description 44
- 238000010438 heat treatment Methods 0.000 claims abstract description 29
- 238000010622 cold drawing Methods 0.000 claims abstract description 25
- 238000005498 polishing Methods 0.000 claims abstract description 25
- 238000005097 cold rolling Methods 0.000 claims abstract description 21
- 238000005246 galvanizing Methods 0.000 claims abstract description 21
- 238000002161 passivation Methods 0.000 claims abstract description 16
- 238000000137 annealing Methods 0.000 claims abstract description 14
- 229910000963 austenitic stainless steel Inorganic materials 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 238000005096 rolling process Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000002253 acid Substances 0.000 claims description 14
- 230000001050 lubricating effect Effects 0.000 claims description 14
- 229910017604 nitric acid Inorganic materials 0.000 claims description 14
- 238000009713 electroplating Methods 0.000 claims description 12
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 7
- 239000007787 solid Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 abstract description 3
- 239000000243 solution Substances 0.000 description 13
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 239000008399 tap water Substances 0.000 description 2
- 235000020679 tap water Nutrition 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B19/00—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work
- B21B19/02—Tube-rolling by rollers arranged outside the work and having their axes not perpendicular to the axis of the work the axes of the rollers being arranged essentially diagonally to the axis of the work, e.g. "cross" tube-rolling ; Diescher mills, Stiefel disc piercers or Stiefel rotary piercers
- B21B19/04—Rolling basic material of solid, i.e. non-hollow, structure; Piercing, e.g. rotary piercing mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
- B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/22—Electroplating: Baths therefor from solutions of zinc
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/04—Tubes; Rings; Hollow bodies
Abstract
The invention discloses a production process and a device of a household stainless steel seamless steel pipe for small-aperture fluid delivery, which comprises the following specific steps: the austenitic stainless steel round steel is subjected to oblique piercing after heating, annealing, pickling, washing, cold rolling, degreasing, heat treatment, straightening, pickling, washing, degreasing, cold drawing, pickling, washing, degreasing, cold rolling, degreasing, pickling, washing, inner wall galvanizing, polishing, inner wall passivation, inner wall galvanizing, outer wall galvanizing, polishing and outer wall passivation. The stainless steel pipe produced by the invention can be used for conveying household fluid, is not rusty and water-scale-free, and does not produce harmful substances.
Description
Technical Field
The invention relates to the technical field of seamless steel pipes, in particular to a production process and a device of a stainless steel seamless steel pipe for household small-aperture fluid conveying.
Background
The stainless steel seamless steel pipe has wide application field, different requirements on the stainless steel seamless steel pipe, small-aperture seamless steel pipes are needed for fluid conveying of household stainless steel seamless steel pipes, the fluid conveyed by the household seamless steel pipe is basically tap water, and the seamless steel pipe required to be conveyed does not rust and cannot have scale accumulation due to the problems of tap water quality and the quality requirements of people on drinking water, otherwise, the seamless steel pipe is easily blocked. Therefore, it is necessary to develop a process and a device for producing stainless seamless steel tubes for conveying small-bore radial fluids for household use, and the stainless seamless steel tubes produced by the process and the device do not rust, scale and generate harmful substances.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a production process of a stainless steel seamless steel tube for conveying household small-bore fluid, and the stainless steel tube produced by the production process can be used for conveying household fluid, is not rusty and water-scale and does not generate harmful substances.
The production process of the stainless steel seamless steel pipe for conveying the household small-aperture fluid is characterized by comprising the following steps of: the method comprises the following specific steps: the austenitic stainless steel round steel is subjected to oblique piercing after heating, annealing, pickling, washing, cold rolling, degreasing, heat treatment, straightening, pickling, washing, degreasing, cold drawing, pickling, washing, degreasing, cold rolling, degreasing, pickling, washing, inner wall galvanizing, polishing, inner wall passivation, inner wall galvanizing, outer wall galvanizing, polishing and outer wall passivation.
And (3) oblique piercing: an inner pockmark control method is adopted, the diameter-length coefficient is controlled to be 0.2-0.3, the elongation coefficient is controlled to be 2.5-3.5, and the opening temperature is controlled to be 1180-1210 ℃.
And (3) heat treatment: high-temperature solution treatment at 980-1050 ℃ for 120-180 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 2-5%, controlling the deformation rate to be 3-8%, and controlling the drawing speed to be 0.8-1.2 m/min.
Acid washing: nitric acid is adopted, and the concentration is 75-89%.
Degreasing: the acid solution is (3-8%) HF + (10-15%) HNO3The temperature is 45-65 ℃, and the time is 22-32 min.
The invention also provides the stainless steel seamless steel pipe for conveying the household small-hole radial fluid, which comprises the following specific steps:
comprises a heating furnace, a skew rolling continuous rolling unit, an annealing furnace, a first-stage pickling tank, a first-stage water washing tank, a first-stage cold rolling unit, a first-stage degreasing tank, a first-stage heat treatment tank, a straightening machine, a second-stage pickling tank, a second-stage water washing tank, a second-stage degreasing tank, a cold drawing machine, a third-stage pickling tank, a third-stage water washing tank, a third-stage degreasing tank, a second-stage cold rolling unit, a fourth-stage degreasing tank, a fourth-stage pickling tank, a fourth-stage water washing tank, a first-stage electroplating unit, a first-stage passivating unit, a second-stage electroplating unit, a second-stage passivating unit and a polishing machine, wherein austenitic stainless steel round steel bars heated by the heating furnace enter the skew rolling continuous rolling unit to undergo skew rolling and perforation, then are sent to the annealing furnace to undergo annealing, then sent to the first-stage pickling tank and the first-stage water, straightening in a straightening machine after heat treatment is finished, then sequentially sending the steel plate into a second-stage pickling tank, a second-stage water washing tank, processing a second-stage degreasing tank, then sending the steel plate into a cold drawing machine for cold drawing, sequentially sending the steel plate into a third-stage pickling tank after cold drawing is finished, processing the steel plate by the third-stage rinsing tank, sequentially sending the steel plate into a second-stage cold rolling unit, a fourth-stage degreasing tank, a fourth-stage pickling tank and a fourth-stage water washing tank for processing, after processing is finished, sending the steel plate into a first-stage electroplating unit for inner wall galvanizing, polishing by a polishing machine after finishing, then sending the steel plate into a first-stage passivation unit for inner wall passivation, sending the steel plate into a second-stage electroplating unit for outer wall galvanizing, polishing by the polishing machine after finishing, and sending.
The invention has the beneficial effects that:
the method comprises the following specific steps: the austenitic stainless steel round steel is subjected to oblique piercing after heating, annealing, pickling, washing, cold rolling, degreasing, heat treatment, straightening, pickling, washing, degreasing, cold drawing, pickling, washing, degreasing, cold rolling, degreasing, pickling, washing, inner wall galvanizing, polishing, inner wall passivation, inner wall galvanizing, outer wall galvanizing, polishing and outer wall passivation. Through the processing of the process steps, the stainless steel seamless steel pipe for conveying the household small-aperture fluid can be manufactured, the household requirements can be completely met, the small-aperture stainless steel seamless steel pipe can be manufactured through the inclined rolling perforation, the cold rolling, the cold drawing and the cold rolling, and meanwhile through the processing of other steps, the manufactured small-aperture stainless steel seamless steel pipe can be guaranteed to be good in surface quality, free of burrs and accurate in size. The aim of corrosion prevention can be achieved through the function of the zinc coating, and scale deposition can be prevented. By adopting the control method of the inner pits at the tail part of the tubular billet, the inner surface quality and the yield of the cross-piercing tubular billet can be improved, and the inner surface quality and the corrosion resistance of a cold-processed finished tube can be improved.
Detailed Description
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Example 1
The production process of the stainless steel seamless steel pipe for conveying the household small-aperture fluid is characterized by comprising the following steps of: the method comprises the following specific steps: the austenitic stainless steel round steel is subjected to oblique piercing after heating, annealing, pickling, washing, cold rolling, degreasing, heat treatment, straightening, pickling, washing, degreasing, cold drawing, pickling, washing, degreasing, cold rolling, degreasing, pickling, washing, inner wall galvanizing, polishing, inner wall passivation, inner wall galvanizing, outer wall galvanizing, polishing and outer wall passivation.
And (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.2, the elongation coefficient is controlled to be 2.5, and the opening temperature is controlled to be 1180 ℃.
And (3) heat treatment: high-temperature solution treatment at 980 deg.C for 120 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 2%, controlling the deformation rate to be 3%, and controlling the drawing speed to be 0.8 m/min.
Acid washing: nitric acid was used at a concentration of 75%.
Degreasing: the acid solution is 3 percent of HF and 10 percent of HNO3The temperature was 45 ℃ and the time was 32 min.
Example 2
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.3, the elongation coefficient is controlled to be 3.5, and the opening temperature is controlled to be 1210 ℃.
And (3) heat treatment: high-temperature solid solution treatment at 1050 deg.C for 120 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 5%, controlling the deformation rate to be 8%, and controlling the drawing speed to be 1.2 m/min.
Acid washing: nitric acid was used at a concentration of 89%.
Degreasing: the acid solution is 8 percent of HF and 15 percent of HNO3The temperature is 65 ℃ and the time is 22 min.
Example 3
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.25, the elongation coefficient is controlled to be 3, and the opening temperature is controlled to be 1190 ℃.
And (3) heat treatment: high-temperature solution treatment at 990 deg.C for 150 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 3%, controlling the deformation rate to be 4%, and controlling the drawing speed to be 1 m/min.
Acid washing: nitric acid was used at a concentration of 78%.
Degreasing: the acid solution is 5 percent of HF and 12 percent of HNO3The temperature is 50 ℃ and the time is 25 min.
Example 4
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.28, the elongation coefficient is controlled to be 3.2, and the opening temperature is controlled to be 1200 ℃.
And (3) heat treatment: high-temperature solution treatment at 1000 deg.C for 160 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 4%, controlling the deformation rate to be 6%, and controlling the drawing speed to be 1.1 m/min.
Acid washing: nitric acid was used at a concentration of 82%.
Degreasing: the acid solution is 6 percent of HF and 13 percent of HNO3The temperature is 55 ℃ and the time is 28 min.
Example 5
This example is substantially the same as example 1, except that: and (3) oblique piercing: by adopting an inner pockmark control method, the diameter-length coefficient is controlled to be 0.3, the elongation coefficient is controlled to be 2.5, and the opening temperature is controlled to be 1210 ℃.
And (3) heat treatment: high-temperature solution treatment at 1110 deg.C for 170 min.
Cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 5%, controlling the deformation rate to be 3%, and controlling the drawing speed to be 0.8 m/min.
Acid washing: nitric acid is used, the concentration is 80%.
Degreasing: the acid solution is 8 percent of HF and 10 percent of HNO3The temperature is 45 ℃ and the time is 31 min.
Example 6
The domestic stainless steel seamless steel pipe for small-bore fluid transportation of this embodiment specifically is: comprises a heating furnace, a skew rolling continuous rolling unit, an annealing furnace, a first-stage pickling tank, a first-stage water washing tank, a first-stage cold rolling unit, a first-stage degreasing tank, a first-stage heat treatment tank, a straightening machine, a second-stage pickling tank, a second-stage water washing tank, a second-stage degreasing tank, a cold drawing machine, a third-stage pickling tank, a third-stage water washing tank, a third-stage degreasing tank, a second-stage cold rolling unit, a fourth-stage degreasing tank, a fourth-stage pickling tank, a fourth-stage water washing tank, a first-stage electroplating unit, a first-stage passivating unit, a second-stage electroplating unit, a second-stage passivating unit and a polishing machine, wherein austenitic stainless steel round steel bars heated by the heating furnace enter the skew rolling continuous rolling unit to undergo skew rolling and perforation, then are sent to the annealing furnace to undergo annealing, then sent to the first-stage pickling tank and the first-stage water, straightening in a straightening machine after heat treatment is finished, then sequentially sending the steel plate into a second-stage pickling tank, a second-stage water washing tank, processing a second-stage degreasing tank, then sending the steel plate into a cold drawing machine for cold drawing, sequentially sending the steel plate into a third-stage pickling tank after cold drawing is finished, processing the steel plate by the third-stage rinsing tank, sequentially sending the steel plate into a second-stage cold rolling unit, a fourth-stage degreasing tank, a fourth-stage pickling tank and a fourth-stage water washing tank for processing, after processing is finished, sending the steel plate into a first-stage electroplating unit for inner wall galvanizing, polishing by a polishing machine after finishing, then sending the steel plate into a first-stage passivation unit for inner wall passivation, sending the steel plate into a second-stage electroplating unit for outer wall galvanizing, polishing by the polishing machine after finishing, and sending.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (7)
1. The production process of the stainless steel seamless steel pipe for conveying the household small-aperture fluid is characterized by comprising the following steps of: the method comprises the following specific steps: the austenitic stainless steel round steel is subjected to oblique piercing after heating, annealing, pickling, washing, cold rolling, degreasing, heat treatment, straightening, pickling, washing, degreasing, cold drawing, pickling, washing, degreasing, cold rolling, degreasing, pickling, washing, inner wall galvanizing, polishing, inner wall passivation, inner wall galvanizing, outer wall galvanizing, polishing and outer wall passivation.
2. The production process of the stainless steel seamless steel pipe for the household small-bore fluid delivery according to claim 1, wherein: and (3) oblique piercing: an inner pockmark control method is adopted, the diameter-length coefficient is controlled to be 0.2-0.3, the elongation coefficient is controlled to be 2.5-3.5, and the opening temperature is controlled to be 1180-1210 ℃.
3. The production process of the stainless steel seamless steel pipe for the household small-bore fluid delivery according to claim 1, wherein: and (3) heat treatment: high-temperature solution treatment at 980-1050 ℃ for 120-180 min.
4. The production process of the stainless steel seamless steel pipe for the household small-bore fluid delivery according to claim 1, wherein: cold drawing: and removing the outer solid lubricating layer during outer diameter drawing, keeping the inner lubricating film, controlling the outer diameter shrinkage rate to be 2-5%, controlling the deformation rate to be 3-8%, and controlling the drawing speed to be 0.8-1.2 m/min.
5. The production process of the stainless steel seamless steel pipe for the household small-bore fluid delivery according to claim 1, wherein: acid washing: nitric acid is adopted, and the concentration is 75-89%.
6. The production process of the stainless steel seamless steel pipe for the household small-bore fluid delivery according to claim 1, wherein: degreasing: the acid solution is (3-8%) HF + (10-15%) HNO3The temperature is 45-65 ℃, and the time is 22-32 min.
7. Domestic aperture fluid is carried and is used seamless steel pipe apparatus for producing of stainless steel, its characterized in that: comprises a heating furnace, a skew rolling continuous rolling unit, an annealing furnace, a first-stage pickling tank, a first-stage water washing tank, a first-stage cold rolling unit, a first-stage degreasing tank, a first-stage heat treatment tank, a straightening machine, a second-stage pickling tank, a second-stage water washing tank, a second-stage degreasing tank, a cold drawing machine, a third-stage pickling tank, a third-stage water washing tank, a third-stage degreasing tank, a second-stage cold rolling unit, a fourth-stage degreasing tank, a fourth-stage pickling tank, a fourth-stage water washing tank, a first-stage electroplating unit, a first-stage passivating unit, a second-stage electroplating unit, a second-stage passivating unit and a polishing machine, wherein austenitic stainless steel round steel bars heated by the heating furnace enter the skew rolling continuous rolling unit to undergo skew rolling and perforation, then are sent to the annealing furnace to undergo annealing, then sent to the first-stage pickling tank and the first-stage water, straightening in a straightening machine after heat treatment is finished, then sequentially sending the steel plate into a second-stage pickling tank, a second-stage water washing tank, processing a second-stage degreasing tank, then sending the steel plate into a cold drawing machine for cold drawing, sequentially sending the steel plate into a third-stage pickling tank after cold drawing is finished, processing the steel plate by the third-stage rinsing tank, sequentially sending the steel plate into a second-stage cold rolling unit, a fourth-stage degreasing tank, a fourth-stage pickling tank and a fourth-stage water washing tank for processing, after processing is finished, sending the steel plate into a first-stage electroplating unit for inner wall galvanizing, polishing by a polishing machine after finishing, then sending the steel plate into a first-stage passivation unit for inner wall passivation, sending the steel plate into a second-stage electroplating unit for outer wall galvanizing, polishing by the polishing machine after finishing, and sending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995482.4A CN112222218A (en) | 2020-09-21 | 2020-09-21 | Production process and device of stainless steel seamless steel pipe for household small-aperture fluid delivery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010995482.4A CN112222218A (en) | 2020-09-21 | 2020-09-21 | Production process and device of stainless steel seamless steel pipe for household small-aperture fluid delivery |
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| Publication Number | Publication Date |
|---|---|
| CN112222218A true CN112222218A (en) | 2021-01-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010995482.4A Pending CN112222218A (en) | 2020-09-21 | 2020-09-21 | Production process and device of stainless steel seamless steel pipe for household small-aperture fluid delivery |
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| Country | Link |
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| CN (1) | CN112222218A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113275408A (en) * | 2021-06-18 | 2021-08-20 | 温州国乐不锈钢管业有限公司 | Production process and equipment of sanitary stainless steel pipe |
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| CN106378364A (en) * | 2015-07-28 | 2017-02-08 | 常州市联谊特种不锈钢管有限公司 | Production method for corrugated pipe blank extremely-thin wall stainless steel seamless steel pipe for nuclear power |
| CN107214480A (en) * | 2017-07-20 | 2017-09-29 | 繁昌县华特机械制造有限公司 | A kind of manufacture method of large-caliber stainless steel seamless pipe |
-
2020
- 2020-09-21 CN CN202010995482.4A patent/CN112222218A/en active Pending
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|---|---|---|---|---|
| CN1651592A (en) * | 2005-01-28 | 2005-08-10 | 左树清 | Preparation method of external zinc coated pipe |
| CN102649211A (en) * | 2011-02-24 | 2012-08-29 | 宝山钢铁股份有限公司 | Manufacturing method of stainless steel seamless steel tube |
| CN102878356A (en) * | 2012-09-26 | 2013-01-16 | 施文龙 | Durable seamless stainless steel tube |
| CN106378364A (en) * | 2015-07-28 | 2017-02-08 | 常州市联谊特种不锈钢管有限公司 | Production method for corrugated pipe blank extremely-thin wall stainless steel seamless steel pipe for nuclear power |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113275408A (en) * | 2021-06-18 | 2021-08-20 | 温州国乐不锈钢管业有限公司 | Production process and equipment of sanitary stainless steel pipe |
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Application publication date: 20210115 |