CN106623432A - Pressure-corrosion and resistant-natural gas pipeline and processing technique thereof - Google Patents

Pressure-corrosion and resistant-natural gas pipeline and processing technique thereof Download PDF

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Publication number
CN106623432A
CN106623432A CN201611162741.5A CN201611162741A CN106623432A CN 106623432 A CN106623432 A CN 106623432A CN 201611162741 A CN201611162741 A CN 201611162741A CN 106623432 A CN106623432 A CN 106623432A
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parts
steel pipe
cooled
heated
temperature
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钱燕华
陈平
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Suzhou Saiside Engineering Equipment Co Ltd
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Suzhou Saiside Engineering Equipment Co Ltd
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    • 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
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • 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
    • B21B19/06—Rolling hollow basic material, e.g. Assel mills
    • B21B19/10—Finishing, e.g. smoothing, sizing, reeling
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/18—Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or their halogen derivatives only
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C09D5/10—Anti-corrosive paints containing metal dust
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/63—Additives non-macromolecular organic
    • 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
    • C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
    • 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
    • C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
    • 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
    • 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
    • C22C38/52—Ferrous alloys, e.g. steel alloys containing chromium with nickel with cobalt
    • 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
    • C22C38/54—Ferrous alloys, e.g. steel alloys containing chromium with nickel with boron
    • 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
    • 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
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and plastics with or without reinforcement
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • Mechanical Engineering (AREA)
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  • Organic Chemistry (AREA)
  • Metallurgy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

The invention discloses a pressure-resistant and corrosion-resistant natural gas pipeline. The pipeline comprises a steel pipe body and a corrosion-resistant layer arranged on the inner wall of the steel pipe body. The mass fractions of the chemical compositions of the steel pipe body are as the following: 0.031-0.035% of C, 7.65-7.95% of Cr, 0.12-0.13% of Si, 1.76-1.77% of Mn, 0.37-0.41% of Co, 0.031-0.033% of B, 0.21-0.25% of Re, 0.017-0.018% of Al, 0.021-0.023% of Ti, 0.004-0.006% of Ca, 0.21-0.22% of Ni, less than or equal to 0.020% of P, less than or equal to 0.015% of S, 0.23-0.26% of rare earth elements, and the balance Fe and unavoidable impurities. Through the rational use of low carbon niobium-free composition design, and through the smelting process based on oxide metallurgy technology, fine, diffused and compound oxide particles are formed in the steel, and austenite grains are refined through the pinning of austenite grain boundaries in a welding heat-affected zone under high heat input condition by high temperature thermal-stable fine dispersed inclusion particles.

Description

A kind of pressure corrosion protection natural gas line and its processing technology
Technical field
The present invention relates to a kind of pipeline and its processing technology, specifically a kind of pressure corrosion protection natural gas line and its add Work technique, belongs to natural gas line equipment technology field.
Background technology
Natural gas is referred to as from the pipeline that exploitation ground or treatment plant are transported to urban gas center or Industry enterprise customer For natural gas line, gas pipeline is also called.Natural gas transportation is carried out using natural gas line, it is natural to be that land conveys in a large number The sole mode of gas；If the length of all pipelines in the world linked together, the length of natural gas line accounts for total length Half, it is seen that importance of the natural gas line in life and production.
The problems such as causing leakage, noise because of corrosion or defective mounting is usually occurring during natural gas transportation, is giving people Cause greatly puzzlement.Under being chronically at noise circumstance, easily there are the phenomenons such as dizziness, tinnitus, more there will be severe essence Refreshing disease, all causes greatly harm, simultaneously as the difference between geographical environment, has to the physiology and mental health of human body A little places, such as the Northeast in the winter time when temperature it is relatively low, natural gas line is exposed in the middle of environment, by raindrop erosion, It is susceptible to damage, and low temperature environment directly affects gas delivery capacity.
The content of the invention
The technical problem to be solved is, for the shortcoming of above prior art, proposes a kind of pressure corrosion protection day So feed channel and its processing technology, can not only meet the pressure requirement of pipeline, additionally it is possible to substantially reduce extraneous factor and conveying Corrosion of the gas to pipeline itself, improves the service life of pipeline.
In order to solve above-mentioned technical problem, the technical scheme is that what is be accomplished by：There is provided a kind of resistance to Pressure corrosion protection natural gas line, the pipeline includes steel tube body and the anticorrosion layer being arranged on steel pipe inner wall, the chemistry of the steel tube body Ingredient percent is：C：0.031-0.035%,Cr：7.65-7.95%, Si：0.12-0.13%,Mn：1.76-1.77%,Co： 0.37-0.41%, B：0.031-0.033%, Re：0.21-0.25%, Al：0.017-0.018%, Ti：0.021-0.023%,Ca： 0.004-0.006%,Ni：0.21-0.22%, P≤0.020%, S≤0.015%, rare earth element：0.23-0.26%, balance of Fe With inevitable impurity；The chemical composition mass percent of the rare earth metal is：Pm：11-16%, Lu：18-21%, Dy：7- 10%, Gd：3-6%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：Yttrium micro mist 17-19 parts, ceramic 5-7 parts, carbonization Silicon 6-8 parts, polyvinyl chloride 2-3 parts, xylene formaldehyde resin 6-8 parts, zinc citrate 1-2 parts, epoxy resin 3-7 parts, formaldehyde Sodium sulphate 1-3 parts, butyl acetate 2-3 parts, polymethyl methacrylate 2-5 parts.
The technical scheme that further limits of the invention is：Aforesaid pressure corrosion protection natural gas line, the steel tube body bend Intensity >=530MPa is taken, tensile strength >=680MPa is adapted to weld heat input for 150-250kJ/cm, 150-250kJ/cm's Under the conditions of Large Heat Input Welding, the average impact work(of the HAZ of steel tube body at -40 DEG C is in more than 150J.
Aforesaid pressure corrosion protection natural gas line, the chemical composition mass percent of the steel tube body is：C：0.031%, Cr：7.65%, Si：0.12%,Mn：1.76%,Co：0.37%, B：0.031%, Re：0.21%, Al：0.017%,Ti：0.021%,Ca： 0.004%,Ni：0.21%, P≤0.020%, S≤0.015%, rare earth element：0.23%, balance of Fe are miscellaneous with inevitable Matter；The chemical composition mass percent of the rare earth metal is：Pm：11%, Lu：18%, Dy：7%, Gd：3%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：17 parts of yttrium micro mist, 5 parts of ceramic, carborundum 6 Part, 2 parts of polyvinyl chloride, 6 parts of xylene formaldehyde resin, 1 part of zinc citrate, 3 parts of epoxy resin, 1 part of sodium sulfoxylate formaldehyde, acetic acid 2 parts of butyl ester, 2 parts of polymethyl methacrylate.
Aforesaid pressure corrosion protection natural gas line, the chemical composition mass percent of the steel tube body is：C：0.033%, Cr：7.75%, Si：0.12%,Mn：1.76%,Co：0.39%, B：0.032%, Re：0.23%, Al：0.018%,Ti：0.022%,Ca： 0.005%,Ni：0.22%, P≤0.020%, S≤0.015%, rare earth element：0.25%, balance of Fe are miscellaneous with inevitable Matter；The chemical composition mass percent of the rare earth metal is：Pm：14%, Lu：19%, Dy：9%, Gd：5%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：18 parts of yttrium micro mist, 6 parts of ceramic, carborundum 7 Part, 3 parts of polyvinyl chloride, 7 parts of xylene formaldehyde resin, 1 part of zinc citrate, 5 parts of epoxy resin, 2 parts of sodium sulfoxylate formaldehyde, acetic acid 2 parts of butyl ester, 4 parts of polymethyl methacrylate.
Aforesaid pressure corrosion protection natural gas line, the chemical composition mass percent of the steel tube body is：C：0.035%, Cr：7.95%, Si：0.13%,Mn：1.77%,Co：0.41%, B：0.033%, Re：0.25%, Al：0.018%,Ti：0.023%,Ca： 0.006%,Ni：0.22%, P≤0.020%, S≤0.015%, rare earth element：0.26%, balance of Fe are miscellaneous with inevitable Matter；The chemical composition mass percent of the rare earth metal is：Pm：16%, Lu：21%, Dy：10%, Gd：6%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：19 parts of yttrium micro mist, 7 parts of ceramic, carborundum 8 Part, 3 parts of polyvinyl chloride, 8 parts of xylene formaldehyde resin, 2 parts of zinc citrate, 7 parts of epoxy resin, 3 parts of sodium sulfoxylate formaldehyde, acetic acid 3 parts of butyl ester, 5 parts of polymethyl methacrylate.
A kind of processing technology of pressure corrosion protection natural gas line, comprises the following steps：
(1) steel billet is heated to 1280-1290 DEG C in annular furnace, and by punch hollow billet is worn into, then through retained mandrel tandem rolling Machine is rolled into hollow forging, and tandem rolling temperature is 1100-1150 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, carries out into heating furnace Reheating carries out test instrument on line, and normalizing temperature is 870-890 DEG C, then carries out hot size, sizing temperature 840- using sizing mill 860 DEG C, after steel pipe is cooled to normal temperature state on cold bed, crop end；
(2）Steel pipe is put into heating furnace and is heated to 980-990 DEG C, 1-3 hours are incubated, then using water-cooled, with 20-25 DEG C/s Speed be cooled to room temperature, then with the speed of 5-8 DEG C/s be heated to 650-670 DEG C again, be incubated 5-8 hours, be then air cooled to Room temperature；Carry out double tempering to steel pipe again, be tempered for the first time：Steel pipe is heated into 545-565 DEG C, after tempering 30-40min, is protected Warm 2-3min, homogenizes temperature of steel pipe, and the mode that water-cooled is adopted afterwards is cooled to 380- with the cooldown rate of 23-25 DEG C/s After 390 DEG C, then it is air cooled to room temperature；Align into vertical cross-roll straightening machine after heat treatment；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
The processing technology of aforesaid pressure corrosion protection natural gas line, comprises the following steps：
(1) steel billet is heated to 1280 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1100 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 870 DEG C, then carries out hot size using sizing mill, 840 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 980 DEG C, be incubated 3 hours, it is cold with the speed of 20 DEG C/s then using water-cooled But to room temperature, then 650 DEG C are heated to again with the speed of 5 DEG C/s, are incubated 8 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 545 DEG C, after tempering 40min, 3min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 380 DEG C with the cooldown rate of 23 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
The processing technology of aforesaid pressure corrosion protection natural gas line, comprises the following steps：
(1) steel billet is heated to 1285 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1130 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 880 DEG C, then carries out hot size using sizing mill, 850 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 985 DEG C, be incubated 2 hours, it is cold with the speed of 23 DEG C/s then using water-cooled But to room temperature, then 660 DEG C are heated to again with the speed of 7 DEG C/s, are incubated 7 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 555 DEG C, after tempering 35min, 3min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 385 DEG C with the cooldown rate of 24 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
Further, the processing technology of aforesaid pressure corrosion protection natural gas line, comprises the following steps：
(1) steel billet is heated to 1290 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1150 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 890 DEG C, then carries out hot size using sizing mill, 860 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 990 DEG C, be incubated 1 hour, it is cold with the speed of 20 DEG C/s then using water-cooled But to room temperature, then 670 DEG C are heated to again with the speed of 5 DEG C/s, are incubated 5 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 565 DEG C, after tempering 30min, 2min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 390 DEG C with the cooldown rate of 25 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
The invention has the beneficial effects as follows：(1) by reasonably using low-carbon (LC) without niobium composition design, by based on oxide smelting The smelting process of technology for gold, forms the oxide particle of tinyization, dispersion, Composite in steel, steady using these high warms The austenite grain boundary of welding heat affected zone under the conditions of fixed small and dispersed inclusion particle pinning high heat input, refines austenite crystal Grain.Simultaneously by the use of these oxides as the forming core point of intragranular acicular ferrite IAF, make to form obdurability in welding heat affected zone Preferably IAF is organized, and then significantly improves the toughness of high heat-input welding heat affected zone.(2) the present invention is by the interior table in steel pipe Anticorrosion layer is sprayed on face makes natural gas line have excellent hic resistance performance, fully meets under acid condition to delivery pipe Decay resistance is required.Anti-H 2 S stress corrosion cracking performance is carried out according to NACE-0177-2005 standards using NOL ring Test, its anti-H 2 S stress corrosion cracking performance meets the requirement of NACE-0177-2005 standards.
Specific embodiment
Below the present invention is described in further detail：
Embodiment 1
A kind of pressure corrosion protection natural gas line that the present embodiment is provided, the chemical composition mass percent of the steel tube body is：C： 0.031%,Cr：7.65%, Si：0.12%,Mn：1.76%,Co：0.37%, B：0.031%, Re：0.21%, Al：0.017%,Ti： 0.021%,Ca：0.004%,Ni：0.21%, P≤0.020%, S≤0.015%, rare earth element：0.23%, balance of Fe and can not The impurity for avoiding；The chemical composition mass percent of the rare earth metal is：Pm：11%, Lu：18%, Dy：7%, Gd：3%, surplus For La；
The meter by weight of each component that the anticorrosion layer is included includes：17 parts of yttrium micro mist, 5 parts of ceramic, carborundum 6 Part, 2 parts of polyvinyl chloride, 6 parts of xylene formaldehyde resin, 1 part of zinc citrate, 3 parts of epoxy resin, 1 part of sodium sulfoxylate formaldehyde, acetic acid 2 parts of butyl ester, 2 parts of polymethyl methacrylate.
The processing technology of the aforesaid pressure corrosion protection natural gas line of the present embodiment, comprises the following steps：
(1) steel billet is heated to 1280 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1100 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 870 DEG C, then carries out hot size using sizing mill, 840 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 980 DEG C, be incubated 3 hours, it is cold with the speed of 20 DEG C/s then using water-cooled But to room temperature, then 650 DEG C are heated to again with the speed of 5 DEG C/s, are incubated 8 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 545 DEG C, after tempering 40min, 3min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 380 DEG C with the cooldown rate of 23 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
Embodiment 2
A kind of pressure corrosion protection natural gas line that the present embodiment is provided, the chemical composition mass percent of the steel tube body is：C： 0.033%,Cr：7.75%, Si：0.12%,Mn：1.76%,Co：0.39%, B：0.032%, Re：0.23%, Al：0.018%,Ti： 0.022%,Ca：0.005%,Ni：0.22%, P≤0.020%, S≤0.015%, rare earth element：0.25%, balance of Fe and can not The impurity for avoiding；The chemical composition mass percent of the rare earth metal is：Pm：14%, Lu：19%, Dy：9%, Gd：5%, surplus For La；
The meter by weight of each component that the anticorrosion layer is included includes：18 parts of yttrium micro mist, 6 parts of ceramic, carborundum 7 Part, 3 parts of polyvinyl chloride, 7 parts of xylene formaldehyde resin, 1 part of zinc citrate, 5 parts of epoxy resin, 2 parts of sodium sulfoxylate formaldehyde, acetic acid 2 parts of butyl ester, 4 parts of polymethyl methacrylate.
The processing technology of the pressure corrosion protection natural gas line of the present embodiment, comprises the following steps：
(1) steel billet is heated to 1285 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1130 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 880 DEG C, then carries out hot size using sizing mill, 850 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 985 DEG C, be incubated 2 hours, it is cold with the speed of 23 DEG C/s then using water-cooled But to room temperature, then 660 DEG C are heated to again with the speed of 7 DEG C/s, are incubated 7 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 555 DEG C, after tempering 35min, 3min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 385 DEG C with the cooldown rate of 24 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
Embodiment 3
A kind of pressure corrosion protection natural gas line that the present embodiment is provided, the chemical composition mass percent of the steel tube body is：C： 0.035%,Cr：7.95%, Si：0.13%,Mn：1.77%,Co：0.41%, B：0.033%, Re：0.25%, Al：0.018%,Ti： 0.023%,Ca：0.006%,Ni：0.22%, P≤0.020%, S≤0.015%, rare earth element：0.26%, balance of Fe and can not The impurity for avoiding；The chemical composition mass percent of the rare earth metal is：Pm：16%, Lu：21%, Dy：10%, Gd：6%, it is remaining Measure as La；
The meter by weight of each component that the anticorrosion layer is included includes：19 parts of yttrium micro mist, 7 parts of ceramic, carborundum 8 Part, 3 parts of polyvinyl chloride, 8 parts of xylene formaldehyde resin, 2 parts of zinc citrate, 7 parts of epoxy resin, 3 parts of sodium sulfoxylate formaldehyde, acetic acid 3 parts of butyl ester, 5 parts of polymethyl methacrylate.
The processing technology of the pressure corrosion protection natural gas line of the present embodiment, comprises the following steps：
(1) steel billet is heated to 1290 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1150 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 890 DEG C, then carries out hot size using sizing mill, 860 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 990 DEG C, be incubated 1 hour, it is cold with the speed of 20 DEG C/s then using water-cooled But to room temperature, then 670 DEG C are heated to again with the speed of 5 DEG C/s, are incubated 5 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 565 DEG C, after tempering 30min, 2min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 390 DEG C with the cooldown rate of 25 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
Above example technological thought only to illustrate the invention, it is impossible to which protection scope of the present invention is limited with this, it is every According to technological thought proposed by the present invention, any change done on the basis of technical scheme, the scope of the present invention is each fallen within Within.

Claims (9)

1. a kind of pressure corrosion protection natural gas line, it is characterised in that：The pipeline includes steel tube body and is arranged on steel pipe inner wall Anticorrosion layer, the chemical composition mass percent of the steel tube body is：C：0.031-0.035%,Cr：7.65-7.95%, Si：0.12- 0.13%,Mn：1.76-1.77%,Co：0.37-0.41%, B：0.031-0.033%, Re：0.21-0.25%, Al：0.017- 0.018%,Ti：0.021-0.023%,Ca：0.004-0.006%,Ni：0.21-0.22%, P≤0.020%, S≤0.015% is dilute Earth elements：0.23-0.26%, balance of Fe and inevitable impurity；The chemical composition mass percent of the rare earth metal For：Pm：11-16%, Lu：18-21%, Dy：7-10%, Gd：3-6%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：Yttrium micro mist 17-19 parts, ceramic 5-7 parts, carbonization Silicon 6-8 parts, polyvinyl chloride 2-3 parts, xylene formaldehyde resin 6-8 parts, zinc citrate 1-2 parts, epoxy resin 3-7 parts, formaldehyde Sodium sulphate 1-3 parts, butyl acetate 2-3 parts, polymethyl methacrylate 2-5 parts.
2. pressure corrosion protection natural gas line according to claim 1, it is characterised in that：The yield strength of the steel tube body >= 530MPa, tensile strength >=680MPa, it is 150-250kJ/cm to be adapted to weld heat input, in the large-line energy of 150-250kJ/cm Under welding condition, the average impact work(of the HAZ of steel tube body at -40 DEG C is in more than 150J.
3. pressure corrosion protection natural gas line according to claim 1, it is characterised in that：The chemical composition matter of the steel tube body Measuring percentage is：C：0.031%,Cr：7.65%, Si：0.12%,Mn：1.76%,Co：0.37%, B：0.031%, Re：0.21%, Al： 0.017%, Ti：0.021%,Ca：0.004%,Ni：0.21%, P≤0.020%, S≤0.015%, rare earth element：0.23%, it is remaining Measure as Fe and inevitable impurity；The chemical composition mass percent of the rare earth metal is：Pm：11%, Lu：18%, Dy： 7%, Gd：3%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：17 parts of yttrium micro mist, 5 parts of ceramic, carborundum 6 Part, 2 parts of polyvinyl chloride, 6 parts of xylene formaldehyde resin, 1 part of zinc citrate, 3 parts of epoxy resin, 1 part of sodium sulfoxylate formaldehyde, acetic acid 2 parts of butyl ester, 2 parts of polymethyl methacrylate.
4. pressure corrosion protection natural gas line according to claim 1, it is characterised in that：The chemical composition matter of the steel tube body Measuring percentage is：C：0.033%,Cr：7.75%, Si：0.12%,Mn：1.76%,Co：0.39%, B：0.032%, Re：0.23%, Al： 0.018%, Ti：0.022%,Ca：0.005%,Ni：0.22%, P≤0.020%, S≤0.015%, rare earth element：0.25%, it is remaining Measure as Fe and inevitable impurity；The chemical composition mass percent of the rare earth metal is：Pm：14%, Lu：19%, Dy： 9%, Gd：5%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：18 parts of yttrium micro mist, 6 parts of ceramic, carborundum 7 Part, 3 parts of polyvinyl chloride, 7 parts of xylene formaldehyde resin, 1 part of zinc citrate, 5 parts of epoxy resin, 2 parts of sodium sulfoxylate formaldehyde, acetic acid 2 parts of butyl ester, 4 parts of polymethyl methacrylate.
5. pressure corrosion protection natural gas line according to claim 1, it is characterised in that：The chemical composition matter of the steel tube body Measuring percentage is：C：0.035%,Cr：7.95%, Si：0.13%,Mn：1.77%,Co：0.41%, B：0.033%, Re：0.25%, Al： 0.018%, Ti：0.023%,Ca：0.006%,Ni：0.22%, P≤0.020%, S≤0.015%, rare earth element：0.26%, it is remaining Measure as Fe and inevitable impurity；The chemical composition mass percent of the rare earth metal is：Pm：16%, Lu：21%, Dy： 10%, Gd：6%, balance of La；
The meter by weight of each component that the anticorrosion layer is included includes：19 parts of yttrium micro mist, 7 parts of ceramic, carborundum 8 Part, 3 parts of polyvinyl chloride, 8 parts of xylene formaldehyde resin, 2 parts of zinc citrate, 7 parts of epoxy resin, 3 parts of sodium sulfoxylate formaldehyde, acetic acid 3 parts of butyl ester, 5 parts of polymethyl methacrylate.
6. the processing technology of pressure corrosion protection natural gas line according to claim 1, it is characterised in that comprise the following steps：
(1) steel billet is heated to 1280-1290 DEG C in annular furnace, and by punch hollow billet is worn into, then through retained mandrel tandem rolling Machine is rolled into hollow forging, and tandem rolling temperature is 1100-1150 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, carries out into heating furnace Reheating carries out test instrument on line, and normalizing temperature is 870-890 DEG C, then carries out hot size, sizing temperature 840- using sizing mill 860 DEG C, after steel pipe is cooled to normal temperature state on cold bed, crop end；
(2）Steel pipe is put into heating furnace and is heated to 980-990 DEG C, 1-3 hours are incubated, then using water-cooled, with 20-25 DEG C/s Speed be cooled to room temperature, then with the speed of 5-8 DEG C/s be heated to 650-670 DEG C again, be incubated 5-8 hours, be then air cooled to Room temperature；Carry out double tempering to steel pipe again, be tempered for the first time：Steel pipe is heated into 545-565 DEG C, after tempering 30-40min, is protected Warm 2-3min, homogenizes temperature of steel pipe, and the mode that water-cooled is adopted afterwards is cooled to 380- with the cooldown rate of 23-25 DEG C/s After 390 DEG C, then it is air cooled to room temperature；Align into vertical cross-roll straightening machine after heat treatment；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
7. the processing technology of pressure corrosion protection natural gas line according to claim 6, it is characterised in that comprise the following steps：
(1) steel billet is heated to 1280 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1100 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 870 DEG C, then carries out hot size using sizing mill, 840 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 980 DEG C, be incubated 3 hours, it is cold with the speed of 20 DEG C/s then using water-cooled But to room temperature, then 650 DEG C are heated to again with the speed of 5 DEG C/s, are incubated 8 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 545 DEG C, after tempering 40min, 3min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 380 DEG C with the cooldown rate of 23 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
8. the processing technology of pressure corrosion protection natural gas line according to claim 6, it is characterised in that comprise the following steps：
(1) steel billet is heated to 1285 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1130 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 880 DEG C, then carries out hot size using sizing mill, 850 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 985 DEG C, be incubated 2 hours, it is cold with the speed of 23 DEG C/s then using water-cooled But to room temperature, then 660 DEG C are heated to again with the speed of 7 DEG C/s, are incubated 7 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 555 DEG C, after tempering 35min, 3min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 385 DEG C with the cooldown rate of 24 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
9. the processing technology of pressure corrosion protection natural gas line according to claim 6, it is characterised in that comprise the following steps：
(1) steel billet is heated to 1290 DEG C in annular furnace, and by punch hollow billet is worn into, then rolls through retained-mandrel MPM Make hollow forging, tandem rolling temperature is 1150 DEG C, and hollow forging is cooled to less than 550 DEG C by cold bed, into heating furnace carry out reheating into Row test instrument on line, normalizing temperature is 890 DEG C, then carries out hot size using sizing mill, 860 DEG C of sizing temperature, and steel pipe is in cold bed On be cooled to after normal temperature state, crop end；
(2）Steel pipe is put into heating furnace and is heated to 990 DEG C, be incubated 1 hour, it is cold with the speed of 20 DEG C/s then using water-cooled But to room temperature, then 670 DEG C are heated to again with the speed of 5 DEG C/s, are incubated 5 hours, be then air cooled to room temperature；Steel pipe is carried out again Double tempering, is tempered for the first time：Steel pipe is heated into 565 DEG C, after tempering 30min, 2min is incubated, temperature of steel pipe is homogenized, After adopting the mode of water-cooled to be cooled to 390 DEG C with the cooldown rate of 25 DEG C/s afterwards, then it is air cooled to room temperature；Enter after heat treatment vertical Formula cross-roll straightening machine is aligned；
(3) post-process：Steel pipe after aligning carries out again hydrostatic test by nondestructive inspection, production tube, and qualified steel pipe is carried out Scale is cut, pipe end adverse slope mouth；Anticorrosion layer is sprayed in inner-walls of duct, is dried, wear pipe end protective cap.
CN201611162741.5A 2016-12-15 2016-12-15 Pressure-corrosion and resistant-natural gas pipeline and processing technique thereof Pending CN106623432A (en)

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Application publication date: 20170510