CN109536856B - Small-diameter seamless high-pressure stainless steel oil pipe - Google Patents

Small-diameter seamless high-pressure stainless steel oil pipe Download PDF

Info

Publication number
CN109536856B
CN109536856B CN201811608884.3A CN201811608884A CN109536856B CN 109536856 B CN109536856 B CN 109536856B CN 201811608884 A CN201811608884 A CN 201811608884A CN 109536856 B CN109536856 B CN 109536856B
Authority
CN
China
Prior art keywords
oil pipe
cooling
layer
stainless steel
heat treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201811608884.3A
Other languages
Chinese (zh)
Other versions
CN109536856A (en
Inventor
郁宇新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuxi Xinchang Steel Pipe Co ltd
Original Assignee
Wuxi Xinchang Steel Pipe Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuxi Xinchang Steel Pipe Co ltd filed Critical Wuxi Xinchang Steel Pipe Co ltd
Priority to CN201811608884.3A priority Critical patent/CN109536856B/en
Publication of CN109536856A publication Critical patent/CN109536856A/en
Application granted granted Critical
Publication of CN109536856B publication Critical patent/CN109536856B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/50—Ferrous alloys, e.g. steel alloys containing chromium with nickel with titanium or zirconium
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
    • C21D8/10—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies
    • C21D8/105—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of tubular bodies of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/04—Ferrous alloys, e.g. steel alloys containing manganese
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C38/00—Ferrous alloys, e.g. steel alloys
    • C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
    • C22C38/40—Ferrous alloys, e.g. steel alloys containing chromium with nickel
    • C22C38/58—Ferrous alloys, e.g. steel alloys containing chromium with nickel with more than 1.5% by weight of manganese
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/081—Iron or steel solutions containing H2SO4
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/088—Iron or steel solutions containing organic acids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/02—Protection of pipes or objects of similar shape against external or internal damage or wear against cracking or buckling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/04—Protection of pipes or objects of similar shape against external or internal damage or wear against fire or other external sources of extreme heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L57/00—Protection of pipes or objects of similar shape against external or internal damage or wear
    • F16L57/06—Protection of pipes or objects of similar shape against external or internal damage or wear against wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/08—Coatings characterised by the materials used by metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1054—Coatings characterised by the materials used by rubber or plastics the coating being placed outside the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00—Water conservation; Efficient water supply; Efficient water use
    • Y02A20/20—Controlling water pollution; Waste water treatment

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Lubricants (AREA)
  • Heat Treatment Of Articles (AREA)

Abstract

The invention discloses a small-diameter seamless high-pressure stainless steel oil pipe, which comprises an oil pipe body and joints, wherein the joints are arranged at two ends of the oil pipe body, and the small-diameter seamless high-pressure stainless steel oil pipe comprises: the oil pipe body sequentially comprises an inner layer, a middle layer, an outer layer and a protective layer from inside to outside, and the inner layer, the middle layer, the outer layer and the protective layer of the oil pipe body are coaxially arranged; the oil pipe body is connected with the joint through a connecting piece, the connecting piece is matched with the oil pipe body, the connecting piece comprises a connecting body and clamping blocks, the clamping blocks are formed by outwards extending two sides of the connecting body, and the clamping blocks are of triangular structures; the connector is matched with the connecting piece, the connector is of a hollow structure, clamping seats are symmetrically arranged in the connector, the clamping seats are of a triangular structure and matched with the clamping blocks, square holes are symmetrically hollowed out on the surface of the connector, and the square holes and the clamping seats are distributed in a staggered mode; the oil pipe has stable performance, high quality of the inner surface and the outer surface and accurate size control.

Description

Small-diameter seamless high-pressure stainless steel oil pipe
Technical Field
The invention relates to a stainless steel oil pipe, in particular to a small-diameter seamless high-pressure stainless steel oil pipe.
Background
Along with the rapid development of global economy, the development and the use of small-diameter seamless high-pressure stainless steel oil pipes at home and abroad also enter a rapid development period, the wide use in multiple fields is increasingly realized, the requirements on the stainless steel oil pipes are also higher and higher, and in order to ensure that the stainless steel oil pipes meet the use requirements in various fields in quantity and quality, the development of new steel types at home and abroad is rapidly developed; the stainless steel in China has a larger gap from the international advanced level in the aspects of process technology, equipment level, product quality and the like, and needs to be continuously researched, developed, technically reformed and improved so as to meet the requirements of national economic development;
the existence of the small-diameter seamless high-pressure stainless steel oil pipe replaces foreign imported like products, and the popularization of the small-diameter seamless high-pressure stainless steel oil pipe has a large application market. At present, manufacturers for producing high-quality small-diameter seamless stainless steel oil pipes on a domestic scale are few, so that research and development of small-diameter seamless stainless steel oil pipes is realized, and the small-diameter seamless stainless steel oil pipes are manufactured into the brand known in the domestic stainless steel seamless capillary oil pipe market and serve the society. The performance of the composite material reaches the level of similar products abroad, so that the composite material can completely replace imported products and is most widely used for medical appliances, heavy equipment, brake systems or liquid pipes.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the small-diameter seamless high-pressure stainless steel oil pipe which has the advantages of stable performance, high quality of the inner surface and the outer surface, accurate size control, long service life, low cost and convenient and quick installation and disassembly.
In order to solve the technical problems, the invention provides a small-diameter seamless high-pressure stainless steel oil pipe, which comprises an oil pipe body and connectors, wherein the connectors are arranged at two ends of the oil pipe body, and the small-diameter seamless high-pressure stainless steel oil pipe comprises:
the oil pipe body sequentially comprises an inner layer, a middle layer, an outer layer and a protective layer from inside to outside, and the inner layer, the middle layer, the outer layer and the protective layer of the oil pipe body are coaxially arranged;
the oil pipe body is connected with the joint through a connecting piece, the connecting piece is matched with the oil pipe body, the connecting piece comprises a connecting body and clamping blocks, the clamping blocks are formed by outwards extending two sides of the connecting body, and the clamping blocks are of triangular structures;
the connector is matched with the connecting piece, the connector is of a hollow structure, clamping seats are symmetrically arranged in the connector, the clamping seats are of triangular structures and matched with the clamping blocks, square holes are symmetrically hollowed out on the surface of the connector, and the square holes and the clamping seats are distributed in a staggered mode.
The technical scheme of the invention is further defined as follows:
in the small-diameter seamless high-pressure stainless steel oil pipe, the protective layer is an abrasion-resistant flame-retardant TPE material layer; the inner layer and the outer layer are made of stainless steel materials.
Among the aforesaid seamless high pressure stainless steel oil pipe of minor diameter, the intermediate level includes anticorrosive coating, nylon layer, glass fiber layer and insulating layer from outside to inside in proper order, wherein:
the anticorrosive layer is a thermoplastic high-density polyethylene layer, and the heat insulating layer is an ultrahigh molecular weight polyethylene layer.
In the small-diameter seamless high-pressure stainless steel oil pipe, the connecting lines of the two symmetrically arranged square holes are perpendicular to the connecting lines of the two symmetrically arranged clamping seats.
In the small-diameter seamless high-pressure stainless steel oil pipe, the pipe body stainless steel material comprises the following components in percentage: c is less than or equal to 0.080%, si is less than or equal to 1.00%, mn is less than or equal to 2.00%, P is less than or equal to 0.035%, S is less than or equal to 0.030%, cr:17.00-19.00%, ni:9.00-12.00%, ti:0.50-0.70%, and the balance of Fe.
The technical effect is that the material is key to quality assurance, under the conditions of technological parameters such as strain rate, temperature, time and the like, various tissue evolution processes of the material are mutually influenced and mutually restricted, the components, the process, the tissue and the performance of the material are organically related, and the tissue determines the performance. Thus, the composition of the deleterious elements S, P in the material is reduced and the other components and amounts thereof are tailored to achieve an optimal performance.
In the small-diameter seamless high-pressure stainless steel oil pipe, the preparation flow of the oil pipe body of the stainless steel oil pipe is as follows: tube blank, test, peeling and sawing, heating, perforating, first pickling, pierced blank inspection, cold rolling, degreasing, first heat treatment, straightening and cutting of the tube, second pickling, cold drawing, degreasing, second heat treatment, straightening and cutting of the tube, third pickling, intermediate inspection, multiple cold drawing, degreasing, third heat treatment, blank drawing, straightening and cutting of the tube, degreasing, finished product surface inspection, marking spraying, packaging and shipping, wherein:
(1) The pickling is specifically as follows:
the primary pickling adopts sulfuric acid, formic acid and diethylene triamine pentamethylene phosphoric acid mixed pickling solution to carry out pickling on the perforated pipe blank for 2-4 times, wherein the pickling solution comprises sulfuric acid in mass ratio: formic acid: diethylenetriamine pentamethylenephosphoric acid=2:1:1.5;
the second acid washing adopts hydrochloric acid with the concentration of 9-11 percent, and the acid washing is carried out for 5-9min at normal temperature;
the third pickling adopts hydrochloric acid with concentration of 12% -15% and sulfuric acid with concentration of 8% -10% mixed in equal proportion to perform pickling for 4-7min at normal temperature;
(2) Cold drawing:
during cold drawing, a high-precision hydraulic cold drawing machine is adopted to carry out precision cold drawing on the pierced billet, and the cold drawing speed is 0.5-0.7m/min; (3) heat treatment:
the temperature of the first heat treatment, the second heat treatment and the third heat treatment is controlled to be 1050-1080 ℃, wherein:
after the first heat treatment, a first cooling procedure is adopted for cooling, wherein the first cooling procedure is as follows: the first cooling process comprises the following steps: adopting water cooling and air cooling to combine, firstly adopting water cooling to cool the pipe blank to 700-800 ℃ at a cooling rate of 4.5-4.8 ℃/s, then air cooling to 500-600 ℃, then adopting water cooling to cool the pipe blank to 150-230 ℃ at a cooling rate of 3.0-3.5 ℃/s, and finally air cooling to room temperature;
and cooling by adopting a second cooling procedure after the second heat treatment, wherein the second cooling procedure is as follows: air cooling the pierced billet on a cooling bed, firstly cooling the pierced billet to 400-480 ℃ at a cooling speed of 5-7 ℃ per second, and then slowly cooling to room temperature;
and the third heat treatment adopts a third cooling procedure for cooling, and the third cooling procedure is a water quenching treatment process.
In the small-diameter seamless high-pressure stainless steel oil pipe, a continuous bright solid solution furnace is adopted as a heat treatment furnace during heat treatment; straightening adopts mechanical, straightening or straightening when straightening and cutting the pipe.
The technical effect is that the automatic bright solid solution furnace is used as a heat treatment furnace for products, stabilizes the product performance and is also beneficial to improving the quality of the inner surface and the outer surface of the products.
In the small-diameter seamless high-pressure stainless steel oil pipe, ultrasonic degreasing is adopted during degreasing, the degreasing tank is filled with ultrasonic waves for degreasing, and the ultrasonic waves are high-frequency sound waves with the frequency of more than 16 kHz;
and the final degreasing treatment is carried out when soft delivery is carried out.
The technical effects are as follows: the ultrasonic degreasing is adopted, so that the cleaning speed is high, the quality is high, the automation is easy to realize, the cleanliness is high, the cleanliness of all steel wires is consistent, hands are not required to contact cleaning liquid, and the cleaning machine is safe and reliable. No damage to the surface of the steel wire, and saving of solvent, heat energy, working site, manpower and the like.
In the small-diameter seamless high-pressure stainless steel oil pipe, the prepared stainless steel oil pipe is controlled to be D=6-10 mm, and S=2-4 mm.
In the small-diameter seamless high-pressure stainless steel oil pipe, rust prevention treatment is carried out on the oil pipe before finished product surface inspection, and the method specifically comprises the following steps:
(1) Placing the oil pipe in antirust liquid for soaking for 3-5h;
the antirust liquid comprises the following components in percentage by mass:
epoxy resin: 10-15%, polyacrylic acid: 20-25%, sodium hydroxide: 12-14%, sodium lauroyl sarcosinate: 0.1-0.3%, benzotriazole: 0.02-0.04%, aqueous nanometer bentonite: 0.5-0.8%, n-butanol 6-8%, and water for the rest, wherein the sum of the components is 100%;
(2) Washing the oil pipe with clear water and airing;
(3) Continuously drying the dried oil pipe, and drying by a dryer;
(4) And (5) frosting the dried relevant surface to finish the rust-proof treatment.
The oil pipe rust-proof liquid has the advantages that the oil pipe is subjected to rust-proof treatment, the rust-proof liquid is convenient to use, safe and reliable, corrosion of the oil pipe is effectively avoided, the oil pipe is protected, and loss of users and enterprises is avoided.
The beneficial effects of the invention are as follows:
the oil pipe body is compounded by multiple layers, the weight is reduced, and the characteristic material with good barrier property and chemical resistance is used as the intermediate layer material layer, so that the oil pipe body has good performance, and meanwhile, the wear resistance and flame retardance of the protective layer are improved, the service life of the whole oil pipe is prolonged, and the cost is reduced;
the oil pipe body is connected with the connector through the connecting piece, the installation is convenient and fast, the structure is simple, the labor intensity is reduced, the cost is saved, the connecting piece is used for connecting the oil pipe body with the connector through the clamping block and the clamping seat on the connector, the rotating connecting piece is used for placing the clamping block at the square hole of the connector when the connector is detached, and the clamping block is pressed to be separated from the connector, so that the oil pipe is convenient and fast.
According to the invention, a low-carbon design is adopted, so that the carbon content is reduced to less than or equal to 0.080, and Cr element in a matrix can be inhibited from precipitating into chromium carbide; when C is higher than 0.08%, the impact capacity of the oil pipe is affected, so that the C is strictly controlled below 0.08%; the design of the content of Cr and Ni is higher, the strength and corrosion resistance are comprehensively considered, the design is beneficial to improving the stress corrosion cracking resistance and sulfide stress cracking resistance of the stainless steel oil pipe, the improvement of Cr is beneficial to improving the uniform corrosion resistance and pitting corrosion resistance of the oil pipe in an oxidizing medium, the strength is also improved, and the adoption of proper improvement of the amounts of Cr and Ni is beneficial to improving the toughness of the material;
si: as reducing agent and deoxidizing agent in the production process
Si less than or equal to 1.00%, mn less than or equal to 2.00%, P less than or equal to 0.035%, S less than or equal to 0.030%, cr:17.00-19.00%, ni:9.00-12.00%, ti:5C-0.70%, and the balance being Fe.
The oil pipe has the advantages of high strength, good low-temperature toughness and low cost by optimizing the design of chemical components and combining a reasonable manufacturing process.
In the processing method, different cooling procedures are provided in different heat treatment stages, and the first cooling procedure adopts the combination of water cooling and air cooling and is sequentially as follows: the carbide can be further fully dissolved and uniformly diffused, and the inter-crystal corrosion and the excessive pitting corrosion caused by the precipitation of the carbide among crystals are avoided; the cooling bed in the second cooling procedure is subjected to air cooling, so that the cooling effect is good, pollution is reduced, the environment is protected, and the cost is low; the third cooling procedure is a water quenching treatment process, so that the tube obtains a mixed structure of ferrite and martensite; according to the technical scheme of combining the rapid cooling of the first cooling process with the slow cooling of the subsequent second cooling process and the final third cooling process in the processing method, cementite in the original oil pipe is obviously crushed, a certain ordered arrangement is maintained, meanwhile, ferrite is enabled to form a continuous structure, dislocation sliding during deformation is enabled to be easier, and the plastic property is improved.
The performances of the small-diameter seamless capillary stainless steel oil pipe can completely meet the austenitic corrosion resistance requirement and the field use requirement with higher high pressure, and can be implemented according to the following standards: GB/T13296-2013, GB/T5310-2008 and foreign ASTM, ASME, EN and other relevant standards; meanwhile, the like products are applied to medical appliances, reworking equipment, brake systems or liquid pipes at present, all materials are imported, the use condition is good at home, and the raw material price is lower than that of the imported products at home and abroad, so that the like products have good market prospect.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic view of the connector of FIG. 1;
FIG. 3 is a schematic view of the joint of FIG. 1;
FIG. 4 is a schematic view of the oil pipe body in FIG. 1;
in the figure: the novel oil pipe comprises a 1-oil pipe body, a 2-connector, a 21-clamping seat, a 22-square hole, a 3-inner layer, a 41-anticorrosive layer, a 42-Ni Long Ceng, a 43-glass fiber layer, a 44-heat insulation layer, a 5-outer layer, a 6-protective layer, a 7-connecting piece, a 71-connecting body and a 72-clamping block.
Detailed Description
Example 1
The embodiment provides a seamless high pressure stainless steel oil pipe of minor diameter, the structure is as shown in fig. 1-4, including oil pipe body 1 and joint 2, joint 2 sets up in the both ends of oil pipe body 1, wherein:
the oil pipe body 1 sequentially comprises an inner layer 3, an intermediate layer 4, an outer layer 5 and a protective layer 6 from inside to outside, and the inner layer 3, the intermediate layer 4, the outer layer 5 and the protective layer 6 of the oil pipe body are coaxially arranged;
the oil pipe body 1 is connected with the joint 2 through the connecting piece 7, the connecting piece 7 is matched with the oil pipe body 1, the connecting piece 7 comprises a connecting body 71 and clamping blocks 72, the clamping blocks 72 are formed by outwards extending two sides of the connecting body 71, and the clamping blocks 72 are of triangular structures;
the connector 2 is matched with the connecting piece 7, the connector 2 is of a hollow structure, clamping seats 21 are symmetrically arranged in the connector 2, the clamping seats 21 are of triangular structures and matched with clamping blocks 72, square holes 22 are symmetrically hollowed out on the surface of the connector 2, and the square holes 22 and the clamping seats 21 are distributed in a staggered mode.
In this embodiment, the protective layer 6 is a layer of TPE material resistant to abrasion and flame; the inner layer 3 and the outer layer 5 are made of stainless steel materials;
the middle layer 4 sequentially comprises an anticorrosive layer 41, a nylon layer 42, a glass fiber layer 43 and a heat insulation layer 44 from outside to inside, wherein: the anticorrosive layer 41 is a thermoplastic high-density polyethylene layer, and the heat insulating layer 44 is an ultra-high molecular weight polyethylene layer.
In the present embodiment, the connecting lines of the two symmetrically arranged square holes 22 are perpendicular to the connecting lines of the two symmetrically arranged clamping bases 21.
Example 2
The embodiment provides a pipe body stainless steel material of the small-diameter seamless high-pressure stainless steel oil pipe in the embodiment 1, which comprises the following components in percentage: c is less than or equal to 0.080%, si is less than or equal to 1.00%, mn is less than or equal to 2.00%, P is less than or equal to 0.035%, S is less than or equal to 0.030%, cr:17.00%, ni:9.00%, ti:0.50%, the balance being Fe.
The preparation flow of the oil pipe body of the stainless steel oil pipe is as follows: tube blank, test, peeling and sawing, heating, perforating, first pickling, pierced blank inspection, cold rolling, degreasing, first heat treatment, straightening and cutting of the tube, second pickling, cold drawing, degreasing, second heat treatment, straightening and cutting of the tube, third pickling, intermediate inspection, multiple cold drawing (drawing of a floating mandrel), degreasing, third heat treatment, blank drawing, straightening and cutting of the tube, degreasing, finished product surface inspection, mark spraying, packaging and shipping, wherein:
(1) The pickling is specifically as follows:
the primary pickling adopts sulfuric acid, formic acid and diethylene triamine pentamethylene phosphoric acid mixed pickling solution to carry out pickling on the perforated pipe blank for 2 times, wherein the pickling solution comprises sulfuric acid in a mass ratio: formic acid: diethylenetriamine pentamethylenephosphoric acid=2:1:1.5;
the second acid washing adopts hydrochloric acid with the concentration of 9 percent, and the acid washing is carried out for 5 minutes at normal temperature;
the third pickling adopts hydrochloric acid with concentration of 12% and sulfuric acid with concentration of 8% which are mixed in equal proportion to perform pickling for 4min at normal temperature;
(2) Cold drawing:
during cold drawing, a high-precision hydraulic cold drawing machine is adopted to carry out precision cold drawing on the pierced billet, and the cold drawing speed is 0.5m/min; (3) heat treatment:
the first heat treatment, the second heat treatment and the third heat treatment are controlled at 1050 ℃, wherein:
after the first heat treatment, a first cooling procedure is adopted for cooling, wherein the first cooling procedure is as follows: the first cooling process comprises the following steps: adopting water cooling and air cooling to combine, firstly adopting water cooling to cool the pipe blank to 700 ℃ at a cooling rate of 4.5 ℃/s, then air cooling to 500 ℃, then adopting water cooling to cool the pipe blank to 150 ℃ at a cooling rate of 3.0 ℃/s, and finally air cooling to room temperature;
and cooling by adopting a second cooling procedure after the second heat treatment, wherein the second cooling procedure is as follows: air cooling the pierced billet on a cooling bed, firstly cooling the pierced billet to 400 ℃ at a cooling speed of 5 ℃ per second, and then slowly cooling the pierced billet to room temperature;
and the third heat treatment adopts a third cooling procedure for cooling, and the third cooling procedure is a water quenching treatment process.
In the embodiment, a continuous bright solid solution furnace is adopted as a heat treatment furnace during heat treatment; straightening adopts mechanical, straightening or straightening when straightening and cutting the pipe.
In the embodiment, ultrasonic degreasing is adopted during degreasing, the degreasing tank is filled with ultrasonic waves, the ultrasonic waves are emitted into the degreasing tank for degreasing, and the ultrasonic waves are high-frequency sound waves with the frequency of more than 16 kHz;
and the final degreasing treatment is carried out when soft delivery is carried out.
The stainless steel oil pipe prepared by the method is controlled to be D=6mm and S=2mm.
In this embodiment, the oil pipe is subjected to rust-proof treatment before the finished product surface inspection, specifically:
(1) Placing the oil pipe in antirust liquid for soaking for 3 hours;
the antirust liquid comprises the following components in percentage by mass:
epoxy resin: 10%, polyacrylic acid: 20%, sodium hydroxide: 12%, sodium lauroyl sarcosinate: 0.1 percent of benzotriazole: 0.02% of water-based nanometer bentonite: 0.5 percent of n-butanol 6 percent and the balance of water, wherein the sum of the components is 100 percent;
(2) Washing the oil pipe with clear water and airing;
(3) Continuously drying the dried oil pipe, and drying by a dryer;
(4) And (5) frosting the dried relevant surface to finish the rust-proof treatment.
Example 3
The embodiment provides a pipe body stainless steel material of the small-diameter seamless high-pressure stainless steel oil pipe in the embodiment 1, which comprises the following components in percentage: c is less than or equal to 0.080%, si is less than or equal to 1.00%, mn is less than or equal to 2.00%, P is less than or equal to 0.035%, S is less than or equal to 0.030%, cr:19.00%, ni:12.00%, ti:0.70% and the balance of Fe.
The preparation flow of the oil pipe body of the stainless steel oil pipe is as follows: tube blank, test, peeling and sawing, heating, perforating, first pickling, pierced blank inspection, cold rolling, degreasing, first heat treatment, straightening and cutting of the tube, second pickling, cold drawing, degreasing, second heat treatment, straightening and cutting of the tube, third pickling, intermediate inspection, multiple cold drawing (drawing of a floating mandrel), degreasing, third heat treatment, blank drawing, straightening and cutting of the tube, degreasing, finished product surface inspection, mark spraying, packaging and shipping, wherein:
(1) The pickling is specifically as follows:
the primary pickling adopts sulfuric acid, formic acid and diethylene triamine pentamethylene phosphoric acid mixed pickling solution to carry out pickling on the perforated pipe blank for 4 times, wherein the pickling solution comprises sulfuric acid in mass ratio: formic acid: diethylenetriamine pentamethylenephosphoric acid=2:1:1.5;
the second acid washing adopts 11% hydrochloric acid, and the acid washing is carried out for 9min at normal temperature;
the third pickling adopts hydrochloric acid with concentration of 15% and sulfuric acid with concentration of 10% which are mixed in equal proportion to carry out pickling for 7min at normal temperature;
(2) Cold drawing:
during cold drawing, a high-precision hydraulic cold drawing machine is adopted to carry out precision cold drawing on the pierced billet, and the cold drawing speed is 0.7m/min; (3) heat treatment:
the temperature of the first heat treatment, the second heat treatment and the third heat treatment is controlled at 1080 ℃, wherein:
after the first heat treatment, a first cooling procedure is adopted for cooling, wherein the first cooling procedure is as follows: the first cooling process comprises the following steps: adopting water cooling and air cooling to combine, firstly adopting water cooling to cool the pipe blank to 800 ℃ at a cooling rate of 4.8 ℃/s, then air cooling to 600 ℃, then adopting water cooling to cool the pipe blank to 230 ℃ at a cooling rate of 3.5 ℃/s, and finally air cooling to room temperature;
and cooling by adopting a second cooling procedure after the second heat treatment, wherein the second cooling procedure is as follows: air cooling the pierced billet on a cooling bed, firstly cooling the pierced billet to 480 ℃ at a cooling speed of 7 ℃ per second, and then slowly cooling the pierced billet to room temperature;
and the third heat treatment adopts a third cooling procedure for cooling, and the third cooling procedure is a water quenching treatment process.
In the embodiment, a continuous bright solid solution furnace is adopted as a heat treatment furnace during heat treatment; straightening adopts mechanical, straightening or straightening when straightening and cutting the pipe.
In the embodiment, ultrasonic degreasing is adopted during degreasing, the degreasing tank is filled with ultrasonic waves, the ultrasonic waves are emitted into the degreasing tank for degreasing, and the ultrasonic waves are high-frequency sound waves with the frequency of more than 16 kHz;
and the final degreasing treatment is carried out when soft delivery is carried out.
The stainless steel oil pipe prepared by the method is controlled to be D=10mm and S=4mm.
In this embodiment, the oil pipe is subjected to rust-proof treatment before the finished product surface inspection, specifically:
(1) Placing the oil pipe in antirust liquid for soaking for 5 hours;
the antirust liquid comprises the following components in percentage by mass:
epoxy resin: 115%, polyacrylic acid: 25%, sodium hydroxide: 14%, sodium lauroyl sarcosinate: 0.3 percent of benzotriazole: 0.04% of water-based nano bentonite: 0.8 percent of n-butanol 8 percent and the balance of water, wherein the sum of the components is 100 percent;
(2) Washing the oil pipe with clear water and airing;
(3) Continuously drying the dried oil pipe, and drying by a dryer;
(4) And (5) frosting the dried relevant surface to finish the rust-proof treatment.
Example 4
The embodiment provides a pipe body stainless steel material of the small-diameter seamless high-pressure stainless steel oil pipe in the embodiment 1, which comprises the following components in percentage: c is less than or equal to 0.080%, si is less than or equal to 1.00%, mn is less than or equal to 2.00%, P is less than or equal to 0.035%, S is less than or equal to 0.030%, cr:18.00%, ni:11.00%, ti:0.60%, the balance being Fe.
The preparation flow of the oil pipe body of the stainless steel oil pipe is as follows: tube blank, test, peeling and sawing, heating, perforating, first pickling, pierced blank inspection, cold rolling, degreasing, first heat treatment, straightening and cutting of the tube, second pickling, cold drawing, degreasing, second heat treatment, straightening and cutting of the tube, third pickling, intermediate inspection, multiple cold drawing (drawing of a floating mandrel), degreasing, third heat treatment, blank drawing, straightening and cutting of the tube, degreasing, finished product surface inspection, mark spraying, packaging and shipping, wherein:
(1) The pickling is specifically as follows:
the primary pickling adopts sulfuric acid, formic acid and diethylene triamine pentamethylene phosphoric acid mixed pickling solution to carry out pickling on the perforated pipe blank for 3 times, wherein the pickling solution comprises sulfuric acid in mass ratio: formic acid: diethylenetriamine pentamethylenephosphoric acid=2:1:1.5;
the second acid washing adopts hydrochloric acid with the concentration of 10 percent, and the acid washing is carried out for 7 minutes at normal temperature;
the third acid washing adopts hydrochloric acid with concentration of 13% and sulfuric acid with concentration of 9% mixed in equal proportion to carry out acid washing for 5min at normal temperature;
(2) Cold drawing:
during cold drawing, a high-precision hydraulic cold drawing machine is adopted to carry out precision cold drawing on the pierced billet, and the cold drawing speed is 0.6m/min; (3) heat treatment:
the temperature of the first heat treatment, the second heat treatment and the third heat treatment is controlled at 1060 ℃, wherein:
after the first heat treatment, a first cooling procedure is adopted for cooling, wherein the first cooling procedure is as follows: the first cooling process comprises the following steps: adopting water cooling and air cooling to combine, firstly adopting water cooling to cool the tube blank to 750 ℃ at a cooling rate of 4.7 ℃/s, then air cooling to 550 ℃, then adopting water cooling to cool the tube blank to 200 ℃ at a cooling rate of 3.2 ℃/s, and finally air cooling to room temperature;
and cooling by adopting a second cooling procedure after the second heat treatment, wherein the second cooling procedure is as follows: air cooling the pierced billet on a cooling bed, firstly cooling the pierced billet to 440 ℃ at a cooling speed of 6 ℃ per second, and then slowly cooling the pierced billet to room temperature;
and the third heat treatment adopts a third cooling procedure for cooling, and the third cooling procedure is a water quenching treatment process.
In the embodiment, a continuous bright solid solution furnace is adopted as a heat treatment furnace during heat treatment; straightening adopts mechanical, straightening or straightening when straightening and cutting the pipe.
In the embodiment, ultrasonic degreasing is adopted during degreasing, the degreasing tank is filled with ultrasonic waves, the ultrasonic waves are emitted into the degreasing tank for degreasing, and the ultrasonic waves are high-frequency sound waves with the frequency of more than 16 kHz;
and the final degreasing treatment is carried out when soft delivery is carried out.
The stainless steel oil pipe prepared by the method is controlled to be D=8mm and S=3mm.
In this embodiment, the oil pipe is subjected to rust-proof treatment before the finished product surface inspection, specifically:
(1) Placing the oil pipe in antirust liquid for soaking for 4 hours;
the antirust liquid comprises the following components in percentage by mass:
epoxy resin: 13%, polyacrylic acid: 22%, sodium hydroxide: 13%, sodium lauroyl sarcosinate: 0.2 percent of benzotriazole: 0.03% of water-based nano bentonite: 0.7 percent of n-butanol 7 percent and the balance of water, wherein the sum of the components is 100 percent;
(2) Washing the oil pipe with clear water and airing;
(3) Continuously drying the dried oil pipe, and drying by a dryer;
(4) And (5) frosting the dried relevant surface to finish the rust-proof treatment.
In addition to the embodiments described above, other embodiments of the invention are possible. All technical schemes formed by equivalent substitution or equivalent transformation fall within the protection scope of the invention.

Claims (7)

1. The utility model provides a seamless high pressure stainless steel oil pipe of minor diameter which characterized in that: including oil pipe body (1) and joint (2), joint (2) set up in the both ends of oil pipe body (1), wherein:
the oil pipe body (1) sequentially comprises an inner layer (3), an intermediate layer, an outer layer (5) and a protective layer (6) from inside to outside, and the inner layer (3), the intermediate layer, the outer layer (5) and the protective layer (6) of the oil pipe body are coaxially arranged;
the oil pipe body (1) is connected with the joint (2) through a connecting piece (7), the connecting piece (7) is matched with the oil pipe body (1), the connecting piece (7) comprises a connecting body (71) and clamping blocks (72), the clamping blocks (72) are formed by outwards extending two sides of the connecting body (71), and the clamping blocks (72) are of triangular structures;
the connector (2) is matched with the connecting piece (7), the connector (2) is of a hollow structure, clamping seats (21) are symmetrically arranged in the connector (2), the clamping seats (21) are of a triangular structure and matched with the clamping blocks (72), square holes (22) are symmetrically hollowed out in the surface of the connector (2), and the square holes (22) are distributed in a staggered mode with the clamping seats (21);
the stainless steel material of the oil pipe body comprises the following components in percentage: c is less than or equal to 0.080%, si is less than or equal to 1.00%, mn is less than or equal to 2.00%, P is less than or equal to 0.035%, S is less than or equal to 0.030%, cr:17.00-19.00%, ni:9.00-12.00%, ti:0.50-0.70%, and the balance being Fe;
the preparation flow of the oil pipe body of the stainless steel oil pipe is as follows: tube blank, test, peeling and sawing, heating, perforating, first pickling, pierced blank inspection, cold rolling, degreasing, first heat treatment, straightening and cutting of the tube, second pickling, cold drawing, degreasing, second heat treatment, straightening and cutting of the tube, third pickling, intermediate inspection, multiple cold drawing, degreasing, third heat treatment, blank drawing, straightening and cutting of the tube, degreasing, finished product surface inspection, marking spraying, packaging and shipping, wherein:
(1) The pickling is specifically as follows:
the primary pickling adopts sulfuric acid, formic acid and diethylenetriamine pentamethylene phosphoric acid mixed pickling solution to pickle the perforated pipe blank for 2-4 times, wherein the pickling solution comprises sulfuric acid in mass ratio: formic acid: diethylenetriamine pentamethylenephosphoric acid=2:1:1.5;
the second acid washing adopts hydrochloric acid with the concentration of 9-11 percent, and the acid washing is carried out for 5-9min at normal temperature;
the third pickling adopts hydrochloric acid with concentration of 12% -15% and sulfuric acid with concentration of 8% -10% mixed in equal proportion to perform pickling for 4-7min at normal temperature;
(2) Cold drawing:
during cold drawing, a high-precision hydraulic cold drawing machine is adopted to carry out precision cold drawing on the pierced billet, and the cold drawing speed is 0.5-0.7m/min;
(3) And (3) heat treatment:
the temperature of the first heat treatment, the second heat treatment and the third heat treatment is controlled to be 1050-1080 ℃, wherein:
after the first heat treatment, a first cooling procedure is adopted for cooling, wherein the first cooling procedure is as follows: the first cooling process comprises the following steps: adopting water cooling and air cooling to combine, firstly adopting water cooling to cool the pipe blank to 700-800 ℃ at a cooling rate of 4.5-4.8 ℃/s, then air cooling to 500-600 ℃, then adopting water cooling to cool the pipe blank to 150-230 ℃ at a cooling rate of 3.0-3.5 ℃/s, and finally air cooling to room temperature;
and cooling by adopting a second cooling procedure after the second heat treatment, wherein the second cooling procedure is as follows: air cooling the pierced billet on a cooling bed, firstly cooling the pierced billet to 400-480 ℃ at a cooling speed of 5-7 ℃ per second, and then slowly cooling to room temperature;
and the third heat treatment adopts a third cooling procedure for cooling, wherein the third cooling procedure is a water quenching treatment process.
2. The small diameter seamless high pressure stainless steel tubing according to claim 1, wherein: the protective layer (6) is an abrasion-resistant flame-retardant TPE material layer; the inner layer (3) and the outer layer (5) are made of stainless steel materials.
3. The small diameter seamless high pressure stainless steel tubing according to claim 1, wherein: the intermediate layer from outside to inside include anticorrosive coating (41), nylon layer (42), glass fiber layer (43) and insulating layer (44) in proper order, wherein:
the anticorrosive layer (41) is a thermoplastic high-density polyethylene layer, and the heat insulation layer (44) is an ultrahigh molecular weight polyethylene layer.
4. The small diameter seamless high pressure stainless steel tubing according to claim 1, wherein: the connecting lines of the two symmetrically arranged square holes (22) are perpendicular to the connecting lines of the two symmetrically arranged clamping seats (21).
5. The small diameter seamless high pressure stainless steel tubing according to claim 1, wherein: the continuous bright solid solution furnace is adopted as a heat treatment furnace during heat treatment; straightening adopts mechanical, straightening or straightening when straightening and cutting the pipe.
6. The small diameter seamless high pressure stainless steel tubing according to claim 1, wherein: when degreasing, ultrasonic degreasing is adopted, the degreasing tank is placed into the degreasing tank, ultrasonic waves are emitted into the degreasing tank for degreasing, and the ultrasonic waves are high-frequency sound waves with the frequency of more than 16 kHz;
and the final degreasing treatment is carried out when soft delivery is carried out.
7. The small diameter seamless high pressure stainless steel tubing according to claim 1, wherein: the oil pipe is subjected to rust prevention treatment before finished product surface inspection, and the rust prevention treatment is specifically as follows:
(1) Placing the oil pipe in antirust liquid for soaking for 3-5h;
the antirust liquid comprises the following components in percentage by mass:
epoxy resin: 10-15%, polyacrylic acid: 20-25%, sodium hydroxide: 12-14%, sodium lauroyl sarcosinate: 0.1-0.3%, benzotriazole: 0.02-0.04%, aqueous nanometer bentonite: 0.5-0.8%, n-butanol 6-8%, and water for the rest, wherein the sum of the components is 100%;
(2) Washing the oil pipe with clear water and airing;
(3) Continuously drying the dried oil pipe, and drying by a dryer;
(4) And (5) frosting the dried relevant surface to finish the rust-proof treatment.
CN201811608884.3A 2018-12-27 2018-12-27 Small-diameter seamless high-pressure stainless steel oil pipe Active CN109536856B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811608884.3A CN109536856B (en) 2018-12-27 2018-12-27 Small-diameter seamless high-pressure stainless steel oil pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811608884.3A CN109536856B (en) 2018-12-27 2018-12-27 Small-diameter seamless high-pressure stainless steel oil pipe

Publications (2)

Publication Number Publication Date
CN109536856A CN109536856A (en) 2019-03-29
CN109536856B true CN109536856B (en) 2023-07-07

Family

ID=65856852

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811608884.3A Active CN109536856B (en) 2018-12-27 2018-12-27 Small-diameter seamless high-pressure stainless steel oil pipe

Country Status (1)

Country Link
CN (1) CN109536856B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115584444A (en) * 2022-10-17 2023-01-10 江苏图南合金股份有限公司 321 type heat-resistant stainless steel precision thin-walled tube and manufacturing method thereof

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2710717B1 (en) * 1993-10-01 1995-12-22 Caillau Ets Quick connection for fitting a rigid tube into a nozzle.
JP4751603B2 (en) * 2004-06-29 2011-08-17 住友金属工業株式会社 Stainless steel pipe manufacturing method
KR101577149B1 (en) * 2011-06-28 2015-12-11 신닛테츠스미킨 카부시키카이샤 Austenitic stainless steel pipe
CN102373381A (en) * 2011-10-10 2012-03-14 辛培兴 Method for manufacturing excellent austenitic stainless steel seamless steel tube
CN205298852U (en) * 2015-12-22 2016-06-08 库博标准汽车配件（苏州）有限公司 Car fires oil pipe
CN105441829B (en) * 2016-01-11 2017-07-11 宝银特种钢管有限公司 A kind of steam generator 08X18H10T stainless-steel seamless pipes
CN207213457U (en) * 2017-09-09 2018-04-10 浙江国邦钢业有限公司 A kind of high-temperature supercritical corrosion-resistant stainless steel elbow

Also Published As

Publication number Publication date
CN109536856A (en) 2019-03-29

Similar Documents

Publication Publication Date Title
US9546408B2 (en) Quenching method for steel pipe
CN103334055B (en) Pipeline steel with resistance against carbon dioxide and hydrogen sulfide corrosion and preparation method thereof
CN101220443A (en) Stainless steel weldless steel tube for ship and producing technique
CN1329546C (en) High-strength drilling rod for petroleum and method for making same
CN103643146B (en) A kind of manufacture method of chrome molybdenum low-alloy prestressed aluminium coated steel wire
CN103320697A (en) Drill rod pipe body applied to ultra-deep well working condition and manufacturing method thereof
CN103074482A (en) Regeneration method of scrapped Cr5 forged-steel working roller
CN109536856B (en) Small-diameter seamless high-pressure stainless steel oil pipe
CN101187295B (en) Super high intensity anti-corrosion pumping rod production method
CN101962707A (en) Method for producing 42CrMo steel seamless steel tube
CN107084288A (en) A kind of 316L stainless steel materials flange and its forging technology
CN107723598B (en) A kind of hydrogen sulfide corrosion-resistant oil pipe and its production method improving fatigue behaviour
CN106048421B (en) A kind of 110ksi grades of stainless steel oil pipe and its manufacture method
CN111570559A (en) Low-carbon high-strength austenitic stainless steel continuous tube and preparation method thereof
CN109161788B (en) High-temperature-resistant petroleum casing pipe for thermal recovery well of hot steam injection thickened oil and manufacturing method thereof
CN1952344A (en) Method for making super-high-strength anti-corrosion pumping polished rod
CN104988407A (en) Petroleum drilling sulphur-resisting drill pipe and preparation method thereof
CN111112338A (en) Manufacturing process of seamless steel tube
CN106269980A (en) A kind of preparation technology of seamless steel pipe
CN106367571B (en) A kind of same temperature hardening heat treatment method of high bending property austempered ductile iron
CN108774678A (en) The heat treatment method of super 13Cr tubing and casings
CN111234863B (en) Forming process of slag oil fluidized bed hydrocracking alloy pipe fitting
CN112317540A (en) Method for processing hollow steel pipe of drill rod
CN103436677B (en) Production method of stainless steel tube specially used for double-tube plate heat exchanger
CN114934163B (en) Manufacturing method of ultralow-carbon austenitic stainless steel thin-wall seamless pipe suitable for manufacturing cutting ferrule

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant