CN102534422B - Manufacturing method of corrosion-resistant steel tubes for natural gas conveying pipelines - Google Patents
Manufacturing method of corrosion-resistant steel tubes for natural gas conveying pipelines Download PDFInfo
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 239000003345 natural gas Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000010935 stainless steel Substances 0.000 title claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 83
- 239000010959 steel Substances 0.000 claims abstract description 83
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000007797 corrosion Effects 0.000 claims abstract description 17
- 238000005260 corrosion Methods 0.000 claims abstract description 17
- 238000003723 Smelting Methods 0.000 claims abstract description 6
- 239000012535 impurity Substances 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 27
- 238000012360 testing method Methods 0.000 claims description 16
- 238000002360 preparation method Methods 0.000 claims description 14
- 238000012546 transfer Methods 0.000 claims description 12
- 229910052742 iron Inorganic materials 0.000 claims description 11
- 238000005242 forging Methods 0.000 claims description 10
- 238000010791 quenching Methods 0.000 claims description 10
- 230000000171 quenching effect Effects 0.000 claims description 10
- 238000007670 refining Methods 0.000 claims description 10
- 238000004513 sizing Methods 0.000 claims description 10
- 238000005496 tempering Methods 0.000 claims description 10
- 238000007669 thermal treatment Methods 0.000 claims description 10
- 238000009849 vacuum degassing Methods 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 7
- 238000005336 cracking Methods 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 208000037656 Respiratory Sounds Diseases 0.000 claims description 5
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 230000002411 adverse Effects 0.000 claims description 5
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
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- 238000010891 electric arc Methods 0.000 claims description 5
- 230000002706 hydrostatic effect Effects 0.000 claims description 5
- 230000002401 inhibitory effect Effects 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 5
- 239000003973 paint Substances 0.000 claims description 5
- 230000000717 retained effect Effects 0.000 claims description 5
- 238000005070 sampling Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 11
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 7
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 7
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 6
- 239000001257 hydrogen Substances 0.000 description 6
- 239000011572 manganese Substances 0.000 description 5
- 229910000851 Alloy steel Inorganic materials 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 235000009508 confectionery Nutrition 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
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- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 235000019362 perlite Nutrition 0.000 description 2
- 239000010451 perlite Substances 0.000 description 2
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- 229910001339 C alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- VTLYFUHAOXGGBS-UHFFFAOYSA-N Fe3+ Chemical compound [Fe+3] VTLYFUHAOXGGBS-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
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- 239000002253 acid Substances 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
The invention discloses a manufacturing method of corrosion-resistant steel tubes for natural gas conveying pipelines. Steel is composed by the following components: by weight percentage, 0.10-0.14 of C, 0.5-0.8 of Si, 1.30-1.50 of Mn, <=0.008 of P, <=0.003 of S, 1.3-1.5 of Cr, 0.3-0.7 of Ni, 0.25-0.45 of Nb, 0.005-0.01 of B, <=0.15 of Cu, 0.020-0.050 if Al, 0.030-0.10 of N, 0.05-0.10 of V and the balance Fe and inevitable impurities. The manufacturing method includes the following steps: 1 steel smelting; 2 tube molding; 3 heat treatment and straightening; and 4 aftertreatment. Mechanical properties and corrosion resistance of the steel manufacture by the method fully meet requirements of the natural gas conveying pipelines.
Description
Technical field
The present invention relates to field of iron and steel, particularly a kind of preparation method of the corrosion-resistant steel for natural-gas transfer pipeline.
Background technology
Corrosion is a kind of common phenomenon in the oil and gas industry, often causes heavy economic losses and serious environment pollution to oil-gas field.Common corrosion failure is divided into two types usually on the sour oil gas field: a class is uniform corrosion and the local corrosion that electrochemical reaction process anode dissolved ferric iron causes, and shows as local corrosions such as wall thickness reduction that metallic facility grows with each passing day and spot corrosion perforation and destroys; Another kind ofly separate out hydrogen atom for the electrochemical reaction process negative electrode, after entering in the steel, cause two kinds of dissimilar crackings of hardware, be sulfide stress cracking (SSC) (Sulfide Stress Cracking, SSC) and hydrogen bring out crackle (Hydrogen Induced Cracking, HIC), HIC often be accompanied by the steel surface hydrogen blistering (Hydrogen Blistering, HB).HIC is one group and is parallel to rolling surface, along the crackle of rolling direction.HIC can be single vertical crack in steel, also can be stepped crackle, also comprises the hydrogen blistering on steel surface.HIC very easily originates from and is fusiformis, the sharp-pointed MnS in two ends is mingled with, and expands along the abnormal structure of carbon, manganese and phosphoric segregation, also can result from banded perlite, expands along the phase boundary between banded perlite and ferrite.
Along with the adjustment of energy structure, the increase of Natural Gas Demand, greatly promoted the development of High Pressure Gas Transmitting Pipeline, transport gas pipeline steel and maximum different be of liquid lines such as transfer oil with steel, the transport gas pipeline steel not only claims to the intensity of steel; Contain in conveying under the Sweet natural gas environment of acid cure hydrogen medium, be the destruction that prevents that hydrogen sulfide from causing pipeline, then require line pipe to have anti-HIC performance requriements.In NACE, use H
2The critical dividing potential drop P of S
H2S=0.0348MPa distinguishes the gaseous corrosion power.Work as P
H2SDuring＜0.0348MPa, be referred to as nonacid gas (Sweet Gas); And work as P
H2SDuring＞0.0348MPa, be referred to as to call sour gas (Sour Gas).The sulphur content of China's natural gas is generally all lower, under the low situation of distribution pressure, and can be by using as sweet gas after the desulfurization.When distribution pressure improves, make the dividing potential drop of hydrogen sulfide be not more than critical dividing potential drop, then must reduce the input concentration of hydrogen sulfide, handle to desulfurization like this and bring great difficulty.The line pipe of development hydrogen sulfide corrosion resistant is imperative, and is more necessary the gas field of very high concerning sulphur content especially or offshore mining.Therefore, the high-strength line-pipe steel pipe of corrosion-resistant sour environment use is the conveying tubing that gas industry is badly in need of.
China publication number CN1811002A, the disclosed anti-H 2 S pipe line steel of CN1351189 are the hot-rolled sheet coil.Seamless tube is the strong point field in heavy wall, high strength, middle high alloy, corrosion-resistant, small serial production, is better than Welded Steel Pipe.C content is low among the CN1811002A, does not add the V element microalloying and handles, and is not high to P, S content requirement, do not provide new technology to solve the negative impact that P, S cause.The disclosed high tenacity anti-H 2 S of CN1351189 steel for gas delivering pipeline, P, S content requirement are very low, the manufacturing cost height, present suitability for industrialized production also is difficult to realize.CN01126611.2 discloses " a kind of low-carbon alloy steel and pipe ", this invention relates to a kind of low-carbon low-alloy steel and pipe, technical problem to be solved is to increase the obdurability of steel alloy and improve hardening capacity and welding property, impact property is not very desirable, added multiple noble metal, the production cost height, and do not consider the excellent proportioning of corrosion resistance nature alloying element, do not possess good anti-HIC performance, the tubing of Zhi Zaoing does not possess the requirement of carrying acidic medium thus.
Summary of the invention
At the defective of above-mentioned prior art, the object of the present invention is to provide a kind of natural-gas transfer pipeline with the preparation method of corrosion-resistant steel pipe, satisfy the demand that natural-gas transfer pipeline is used steel to provide.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of natural-gas transfer pipeline is with the preparation method of corrosion-resistant steel pipe, described steel is made up of following component by weight percentage: C:0.10～0.14, Si:0.5～0.8, Mn:1.30～1.50, P :≤0.008, S :≤0.003, Cr:1.3～1.5, Ni:0.3～0.7, Nb:0.25～0.45, B:0.005～0.01, Cu :≤0.15, Al:0.020～0.050, N:0.030～0.10, and V:0.05～0.10, all the other are Fe and unavoidable impurities; Described preparation method comprises the steps:
(1) smelting of steel: steel scrap, sponge iron and molten iron enter refining furnace and carry out external refining, sampling analysis be fused into molten steel in 150 tons of ultra-high power electric arc furnaces after, and according to analytical results, adjust the content of steel interalloy element; Outgas through the high vacuum degassing stove and to handle the stove high vacuum degassing, take off S, remove inclusion, feed behind the silk pure molten steel, continuous caster is cast circular steel billet.
(2) moulding of pipe: steel billet is heated to about 1265～1275 ℃ in ring furnace, wear into hollow billet by diescher piercer, be rolled into hollow forging through Φ 250mmMPM seven frame retained mandrel continuous mills again, the tandem rolling temperature is 1005～1045 ℃, hollow forging is cooled to below 550 ℃ by chain type cooling bed, entering process furnace carries out reheat and carries out online normalizing, the normalizing temperature is 890～920 ℃, can adopt 14 frame sizing mills to carry out hot size then, 850～870 ℃ of sizing temperature, steel pipe after cold bed is cooled to the normal temperature state, crop end;
(3) thermal treatment and aligning: above-mentioned steel pipe is heated to 1000～1020 ℃ in the quenching process furnace, and cold quenching behind insulation 15～30min is heated to 655～670 ℃ then in the tempering process furnace, carry out tempering; Enter the vertical cross-roll straightening machine aligning of 6 rollers after the thermal treatment;
(4) aftertreatment: the steel pipe behind the aligning is by non-destructive test(ing)(NDT), and production tube carries out hydrostatic test again, and qualified steel pipe carries out scale cuts, and pipe end adverse slope mouth is surveyed then and grown, weighs, sprays mark, is coated with rust-inhibiting paint, dries, wears tin hat.
Beneficial effect of the present invention is:
(1) the present invention works in coordination with by optimizing the composition design of steel, make to produce between each alloy element, improves the erosion resistance of steel, improves the intensity of steel simultaneously.
(2) according to the composition of designed steel, the processing parameter of each step of preparation steel pipe is optimized adjustment, above-mentioned processing parameter is to draw on the basis of a large amount of technological tests, therefore, advantageously guaranteed designed rigidity can realization.
(3) natural-gas transfer pipeline of the present invention can reach following performance index with corrosion-resistant steel:
1. tensile property: yield strength: 582～607MPa, tensile strength: 683～712MPa;
2. ballistic work: 0 ℃ of test temperature, laterally full-scale down than ballistic work 〉=230J, shear area 100%;
3. corrosion resistance nature: press NACE TM0284-96 standard, under A solution and B solution trial condition, soak 96 hours test samples respectively, crackle all do not occur, have excellent anti-HIC performance, satisfy under the acidic conditions corrosion resistance nature requirement to transfer lime fully.Anti-H
2S stress corrosion crack performance adopts stress loop to test according to the NACE-0177-2005 standard, and its anti-H 2 S stress corrosion cracking performance satisfies the NACE-0177-2005 standard-required.
Embodiment
Embodiment one
A kind of natural-gas transfer pipeline is with the preparation method of corrosion-resistant steel pipe, described steel is made up of following component by weight percentage: C:0.10, Si:0.8, Mn:1.30, P :≤0.008, S :≤0.003, Cr:1.5, Ni:0.3, Nb:0.45, B:0.005, Cu :≤0.15, Al:0.050, N:0.030, and V:0.10, all the other are Fe and unavoidable impurities; Described preparation method comprises the steps:
(1) smelting of steel: steel scrap, sponge iron and molten iron enter refining furnace and carry out external refining, sampling analysis be fused into molten steel in 150 tons of ultra-high power electric arc furnaces after, and according to analytical results, adjust the content of steel interalloy element; Outgas through the high vacuum degassing stove and to handle the stove high vacuum degassing, take off S, remove inclusion, feed behind the silk pure molten steel, continuous caster is cast circular steel billet.
(2) moulding of pipe: steel billet is heated to about 1265～1275 ℃ in ring furnace, wear into hollow billet by diescher piercer, be rolled into hollow forging through Φ 250mmMPM seven frame retained mandrel continuous mills again, the tandem rolling temperature is 1005～1045 ℃, hollow forging is cooled to below 550 ℃ by chain type cooling bed, entering process furnace carries out reheat and carries out online normalizing, the normalizing temperature is 890 ℃, can adopt 14 frame sizing mills to carry out hot size then, 850～870 ℃ of sizing temperature, steel pipe after cold bed is cooled to the normal temperature state, crop end;
(3) thermal treatment and aligning: above-mentioned steel pipe is heated to 1000 ℃ in the quenching process furnace, and cold quenching behind the insulation 30min is heated to 655 ℃ then in the tempering process furnace, carry out tempering; Enter the vertical cross-roll straightening machine aligning of 6 rollers after the thermal treatment;
(4) aftertreatment: the steel pipe behind the aligning is by non-destructive test(ing)(NDT), and production tube carries out hydrostatic test again, and qualified steel pipe carries out scale cuts, and pipe end adverse slope mouth is surveyed then and grown, weighs, sprays mark, is coated with rust-inhibiting paint, dries, wears tin hat.
Embodiment two
A kind of natural-gas transfer pipeline is with the preparation method of corrosion-resistant steel pipe, described steel is made up of following component by weight percentage: C:0.14, Si:0.5, Mn:1.50, P :≤0.008, S :≤0.003, Cr:1.3, Ni:0.7, Nb:0.25, B:0.01, Cu :≤0.15, Al:0.020, N:0.10, and V:0.05, all the other are Fe and unavoidable impurities; Described preparation method comprises the steps:
(1) smelting of steel: steel scrap, sponge iron and molten iron enter refining furnace and carry out external refining, sampling analysis be fused into molten steel in 150 tons of ultra-high power electric arc furnaces after, and according to analytical results, adjust the content of steel interalloy element; Outgas through the high vacuum degassing stove and to handle the stove high vacuum degassing, take off S, remove inclusion, feed behind the silk pure molten steel, continuous caster is cast circular steel billet.
(2) moulding of pipe: steel billet is heated to about 1265～1275 ℃ in ring furnace, wear into hollow billet by diescher piercer, be rolled into hollow forging through Φ 250mmMPM seven frame retained mandrel continuous mills again, the tandem rolling temperature is 1005～1045 ℃, hollow forging is cooled to below 550 ℃ by chain type cooling bed, entering process furnace carries out reheat and carries out online normalizing, the normalizing temperature is 920 ℃, can adopt 14 frame sizing mills to carry out hot size then, 850～870 ℃ of sizing temperature, steel pipe after cold bed is cooled to the normal temperature state, crop end;
(3) thermal treatment and aligning: above-mentioned steel pipe is heated to 1020 ℃ in the quenching process furnace, and cold quenching behind the insulation 15min is heated to 670 ℃ then in the tempering process furnace, carry out tempering; Enter the vertical cross-roll straightening machine aligning of 6 rollers after the thermal treatment;
(4) aftertreatment: the steel pipe behind the aligning is by non-destructive test(ing)(NDT), and production tube carries out hydrostatic test again, and qualified steel pipe carries out scale cuts, and pipe end adverse slope mouth is surveyed then and grown, weighs, sprays mark, is coated with rust-inhibiting paint, dries, wears tin hat.
Embodiment three
A kind of natural-gas transfer pipeline is with the preparation method of corrosion-resistant steel pipe, described steel is made up of following component by weight percentage: C:0.12, Si:0.65, Mn:1.45, P :≤0.008, S :≤0.003, Cr:1.4, Ni:0.5, Nb:0.35, B:0.008, Cu :≤0.15, Al:0.035, N:0.07, and V:0.08, all the other are Fe and unavoidable impurities; Described preparation method comprises the steps:
(1) smelting of steel: steel scrap, sponge iron and molten iron enter refining furnace and carry out external refining, sampling analysis be fused into molten steel in 150 tons of ultra-high power electric arc furnaces after, and according to analytical results, adjust the content of steel interalloy element; Outgas through the high vacuum degassing stove and to handle the stove high vacuum degassing, take off S, remove inclusion, feed behind the silk pure molten steel, continuous caster is cast circular steel billet.
(2) moulding of pipe: steel billet is heated to about 1265～1275 ℃ in ring furnace, wear into hollow billet by diescher piercer, be rolled into hollow forging through Φ 250mmMPM seven frame retained mandrel continuous mills again, the tandem rolling temperature is 1005～1045 ℃, hollow forging is cooled to below 550 ℃ by chain type cooling bed, entering process furnace carries out reheat and carries out online normalizing, the normalizing temperature is 905 ℃, can adopt 14 frame sizing mills to carry out hot size then, 850～870 ℃ of sizing temperature, steel pipe after cold bed is cooled to the normal temperature state, crop end;
(3) thermal treatment and aligning: above-mentioned steel pipe is heated to 1010 ℃ in the quenching process furnace, and cold quenching behind the insulation 22min is heated to 665 ℃ then in the tempering process furnace, carry out tempering; Enter the vertical cross-roll straightening machine aligning of 6 rollers after the thermal treatment;
(4) aftertreatment: the steel pipe behind the aligning is by non-destructive test(ing)(NDT), and production tube carries out hydrostatic test again, and qualified steel pipe carries out scale cuts, and pipe end adverse slope mouth is surveyed then and grown, weighs, sprays mark, is coated with rust-inhibiting paint, dries, wears tin hat.
Applicant's statement, the present invention illustrates detailed process equipment of the present invention and technical process by above-described embodiment, but the present invention is not limited to above-mentioned detailed process equipment and technical process, does not mean that namely the present invention must rely on above-mentioned detailed process equipment and technical process could be implemented.The person of ordinary skill in the field should understand, any improvement in the present invention to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (1)
1. a natural-gas transfer pipeline is with the preparation method of corrosion-resistant steel pipe, it is characterized in that, described steel is made up of following component by weight percentage: C:0.10～0.14, Si:0.5～0.8, Mn:1.30～1.50, P :≤0.008, S :≤0.003, Cr:1.3～1.5, Ni:0.3～0.7, Nb:0.25～0.45, B:0.005～0.01, Cu :≤0.15, Al:0.020～0.050, N:0.030～0.10, and V:0.05～0.10, all the other are Fe and unavoidable impurities; Described preparation method comprises the steps:
(1) smelting of steel: steel scrap, sponge iron and molten iron enter refining furnace and carry out external refining, sampling analysis be fused into molten steel in 150 tons of ultra-high power electric arc furnaces after, and according to analytical results, adjust the content of steel interalloy element; Outgas through the high vacuum degassing stove and to handle the stove high vacuum degassing, take off S, remove inclusion, feed behind the silk pure molten steel, continuous caster is cast circular steel billet;
(2) moulding of pipe: steel billet is heated to 1265～1275 ℃ in ring furnace, wear into hollow billet by diescher piercer, be rolled into hollow forging through Φ 250mmMPM seven frame retained mandrel continuous mills again, the tandem rolling temperature is 1005～1045 ℃, hollow forging is cooled to below 550 ℃ by chain type cooling bed, entering process furnace carries out reheat and carries out online normalizing, the normalizing temperature is 890～920 ℃, adopt 14 frame sizing mills to carry out hot size then, 850～870 ℃ of sizing temperature, steel pipe after cold bed is cooled to the normal temperature state, crop end;
(3) thermal treatment and aligning: above-mentioned steel pipe is heated to 1000～1020 ℃ in the quenching process furnace, and cold quenching behind insulation 15～30min is heated to 655～670 ℃ then in the tempering process furnace, carry out tempering; Enter the vertical cross-roll straightening machine aligning of 6 rollers after the thermal treatment;
(4) aftertreatment: the steel pipe behind the aligning is by non-destructive test(ing)(NDT), and production tube carries out hydrostatic test again, and qualified steel pipe carries out scale cuts, and pipe end adverse slope mouth is surveyed then and grown, weighs, sprays mark, is coated with rust-inhibiting paint, dries, wears tin hat;
Described steel yield strength is 582～607MPa, and tensile strength is 683～712MPa; 0 ℃ of test temperature, laterally, full-scale Charpy-V impact power 〉=230J, shear area 100%; Press NACE TM0284-96 standard, soak 96 hours test samples respectively under A solution and B solution trial condition, crackle all do not occur, the anti-H 2 S stress corrosion cracking performance satisfies the NACE-0177-2005 standard-required.
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| CN103725859B (en) * | 2013-11-30 | 2015-09-16 | 常熟市东鑫钢管有限公司 | The manufacture method of weldless steel tube |
| CN105603335A (en) * | 2016-01-19 | 2016-05-25 | 安徽涌畅铸件有限公司 | Production method of natural gas alloy steel pipe |
| CN106623432A (en) * | 2016-12-15 | 2017-05-10 | 苏州赛斯德工程设备有限公司 | Pressure-corrosion and resistant-natural gas pipeline and processing technique thereof |
| CN106591705A (en) * | 2016-12-15 | 2017-04-26 | 苏州赛斯德工程设备有限公司 | Natural gas pipe with corrosion resisting inner layer and machining process thereof |
| CN108692112A (en) * | 2018-06-29 | 2018-10-23 | 梅州中燃城市燃气发展有限公司 | A kind of corrosion-proof steel pipe and its preparation process for delivery industry combustion gas |
| CN109351932A (en) * | 2018-12-10 | 2019-02-19 | 河北宏程管业有限公司 | A kind of pyrocondensation alloy thick-wall seamless and seamless pipe manufacturing process |
| CN115256750A (en) * | 2022-08-01 | 2022-11-01 | 洪泽永振精密管业有限公司 | A kind of corrosion-resistant fine steel pipe and its processing technology |
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| CN1391021A (en) * | 2001-06-07 | 2003-01-15 | 天津钢管公司 | Sleeved petroleum pipe resisting CO2 corrosion and its making method |
| CN102264937A (en) * | 2008-12-24 | 2011-11-30 | 杰富意钢铁株式会社 | Corrosion-resistant steel material for crude oil tanker |
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| JP2000144244A (en) * | 1998-11-10 | 2000-05-26 | Nkk Corp | Method for producing steel material having ultrafine structure |
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|---|---|---|---|---|
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