JP7468616B2 - 水素ガス用鋼管、水素ガス用鋼管の製造方法、水素ガス用圧力容器、および水素ガス用圧力容器の製造方法 - Google Patents
水素ガス用鋼管、水素ガス用鋼管の製造方法、水素ガス用圧力容器、および水素ガス用圧力容器の製造方法 Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims description 161
- 239000010959 steel Substances 0.000 title claims description 161
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims description 106
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 238000005498 polishing Methods 0.000 claims description 84
- 238000000034 method Methods 0.000 claims description 30
- 238000012545 processing Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 description 21
- 229910052739 hydrogen Inorganic materials 0.000 description 21
- 238000012360 testing method Methods 0.000 description 16
- 238000005516 engineering process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 3
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 208000010392 Bone Fractures Diseases 0.000 description 2
- 206010017076 Fracture Diseases 0.000 description 2
- VNTLIPZTSJSULJ-UHFFFAOYSA-N chromium molybdenum Chemical compound [Cr].[Mo] VNTLIPZTSJSULJ-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003746 surface roughness Effects 0.000 description 2
- 229910000617 Mangalloy Inorganic materials 0.000 description 1
- QDLZHJXUBZCCAD-UHFFFAOYSA-N [Cr].[Mn] Chemical compound [Cr].[Mn] QDLZHJXUBZCCAD-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000376 effect on fatigue Effects 0.000 description 1
- 229910001651 emery Inorganic materials 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002436 steel type Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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Classifications
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- 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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J12/00—Pressure vessels in general
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/06—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding cylindrical surfaces internally
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/36—Single-purpose machines or devices
- B24B5/40—Single-purpose machines or devices for grinding tubes internally
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- 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
- F16L9/02—Rigid pipes of metal
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/10—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for protection against corrosion, e.g. due to gaseous acid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0138—Shape tubular
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/05—Size
- F17C2201/056—Small (<1 m3)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0602—Wall structures; Special features thereof
- F17C2203/0612—Wall structures
- F17C2203/0614—Single wall
- F17C2203/0619—Single wall with two layers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
- F17C2203/0634—Materials for walls or layers thereof
- F17C2203/0636—Metals
- F17C2203/0639—Steels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
- F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
- F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
- F17C2205/0352—Pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/21—Shaping processes
- F17C2209/2172—Polishing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2209/00—Vessel construction, in particular methods of manufacturing
- F17C2209/22—Assembling processes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
- F17C2221/012—Hydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0107—Single phase
- F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
- F17C2223/036—Very high pressure (>80 bar)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/01—Improving mechanical properties or manufacturing
- F17C2260/011—Improving strength
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat Treatment Of Articles (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Description
前記内面に存在する研磨筋の、前記水素ガス用鋼管の周方向に対する傾斜角度が0~30°である、水素ガス用鋼管。
前記鋼管の内面に形成される研磨筋の、前記鋼管の周方向に対する傾斜角度を0~30°とする、水素ガス用鋼管の製造方法。
まず、本発明の一実施形態における水素ガス用鋼管について説明する。本発明の水素ガス用鋼管は、内面が仕上研磨された水素ガス用鋼管であって、前記内面に存在する研磨筋の、前記水素ガス用鋼管の周方向に対する角度(以下、「傾斜角度」という)が0~30°である。
鋼管の内面を仕上研磨する際には、一般的に、砥石などの研磨具を鋼管に対して相対的に移動させることによって研磨が行われる。そのため、仕上研磨後の鋼管の内面には、研磨の際の移動方向に応じた研磨筋が形成される。この研磨筋の一本一本に着目すると、鋼管の内表面から厚さ方向にある程度の深さを持ったノッチ状の欠陥と見なすことができる。
本発明の水素ガス用鋼管の内面の粗さはとくに限定されず、任意の粗さであってよい。しかし、上述したように本願発明の水素ガス用鋼管では、従来とは異なり研磨筋の方向を制御することによって耐水素脆化特性を向上させているため、鏡面研磨と呼ばれる水準にまで平滑に仕上げる必要がない。したがって、前記水素ガス用鋼管の内面のRzは、20μmより大きくてもよい。言い換えると、過度な研磨工程を省いて生産性をさらに向上させるという観点からは、Rzを20μmより大きくすることが好ましい。Rzは、25μm以上とすることが好ましく、30μm以上とすることがより好ましい。
次に、本発明の一実施形態における水素ガス用鋼管の製造方法について説明する。本発明の水素ガス用鋼管は、研磨筋の傾斜角度が上述した条件を満たすように鋼管の内面を研磨することにより製造することができる。
本発明の水素ガス用鋼管は、水素ガス用圧力容器や水素ガス用配管など、水素ガスと接触する状態で用いられる任意の用途に用いることができる。中でも、高圧の水素ガス環境下で用いられる高圧水素ガス用鋼管として好適に用いることができる。
前記試験片の表面に形成された研磨筋の傾斜角度を、上述した手順で測定した。ただし、本実施例では丸棒試験片を用いて鋼管を模擬した試験を行ったため、応力が負荷される方向である試験片の長手方向が鋼管における周方向に相当する。そのため、傾斜角度測定用サンプルは、前記丸棒試験片から、試験片の長手方向と画像のx方向が平行となるように採取した。したがって、以下の説明では、試験片の長手方向に対する研磨筋の角度を傾斜角度として表す。研磨筋の観察には、株式会社ハイロックス製のデジタルマイクロスコープHRX-01を使用した。測定結果を表1に示す。
また、上記試験片表面の最大高さRz(JIS B0601:2001)は、株式会社ハイロックス製のデジタルマイクロスコープHRX-01に実装されている3D計測機能の一部を用いて測定した。測定結果を表1に示す。
次に、前記試験片を用いて、室温、圧力105MPaの高圧水素ガス雰囲気中において応力比R=-1での完全両振り疲労寿命試験を実施した。前記疲労寿命試験における応力水準(負荷応力/引張強度)は表1に示したとおりとした。また、前記試験では、試験周波数を1Hzとし、繰返し数Nが100万回に達した時点で破断が生じなかった場合には試験を中断した。
Claims (5)
- 内面が仕上研磨された水素ガス用鋼管であって、
前記内面に研磨筋が形成され、前記内面の最大高さRzが6μm以上であり、前記研磨筋の前記水素ガス用鋼管の周方向に対する傾斜角度の頻度分布を作成し、ガウス関数を用いてフィッティングを行うことで得られる平均値が0~30°である、水素ガス用鋼管。 - 前記内面の最大高さRzが20μmより大きい、請求項1に記載の水素ガス用鋼管。
- 研磨対象としての鋼管の内面に研磨具を接触させた状態で、前記鋼管を前記研磨具に対し相対的に移動させることによって前記鋼管の内面を研磨する水素ガス用鋼管の製造方法であって、
前記鋼管の内面に研磨筋を形成し、前記内面の最大高さRzが6μm以上であり、前記研磨筋の前記鋼管の周方向に対する傾斜角度の頻度分布を作成し、ガウス関数を用いてフィッティングを行うことで得られる平均値を0~30°とする、水素ガス用鋼管の製造方法。 - 請求項1または2に記載の水素ガス用鋼管を用いた水素ガス用圧力容器。
- 請求項1または2に記載の水素ガス用鋼管を加工して水素ガス用圧力容器とする、水素ガス用圧力容器の製造方法。
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JP2009299174A (ja) | 2008-06-17 | 2009-12-24 | Nisshin Steel Co Ltd | 高圧水素ガス用圧力容器およびパイプ |
WO2011094592A1 (en) | 2010-01-29 | 2011-08-04 | Tokyo Electron Limited | Method and system for self-learning and self-improving a semiconductor manufacturing tool |
WO2014174845A1 (ja) | 2013-04-26 | 2014-10-30 | Jfeスチール株式会社 | 蓄圧器 |
JP2016172909A (ja) | 2015-03-18 | 2016-09-29 | 新日鐵住金株式会社 | 高圧水素用容器およびその製造方法 |
JP2017048912A (ja) | 2015-09-03 | 2017-03-09 | 新日鐵住金株式会社 | 高圧タンク |
CN107435814A (zh) | 2017-07-12 | 2017-12-05 | 鲁西新能源装备集团有限公司 | 一种降低高纯氢气管束式集装箱内气瓶露点的方法 |
CN208468043U (zh) | 2018-07-03 | 2019-02-05 | 河北敬业精密制管有限公司 | 一种钢管内部打磨装置 |
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WO2011094592A1 (en) | 2010-01-29 | 2011-08-04 | Tokyo Electron Limited | Method and system for self-learning and self-improving a semiconductor manufacturing tool |
WO2014174845A1 (ja) | 2013-04-26 | 2014-10-30 | Jfeスチール株式会社 | 蓄圧器 |
JP2016172909A (ja) | 2015-03-18 | 2016-09-29 | 新日鐵住金株式会社 | 高圧水素用容器およびその製造方法 |
JP2017048912A (ja) | 2015-09-03 | 2017-03-09 | 新日鐵住金株式会社 | 高圧タンク |
CN107435814A (zh) | 2017-07-12 | 2017-12-05 | 鲁西新能源装备集团有限公司 | 一种降低高纯氢气管束式集装箱内气瓶露点的方法 |
JP2019044890A (ja) | 2017-09-04 | 2019-03-22 | Jfeスチール株式会社 | 高圧水素ガス用蓄圧器およびその製造方法 |
CN208468043U (zh) | 2018-07-03 | 2019-02-05 | 河北敬业精密制管有限公司 | 一种钢管内部打磨装置 |
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WO2022091846A1 (ja) | 2022-05-05 |
CN116490320A (zh) | 2023-07-25 |
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US20240027022A1 (en) | 2024-01-25 |
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