AP2669A - End boss and composite pressure vessel - Google Patents

End boss and composite pressure vessel

Info

Publication number
AP2669A
AP2669A AP2009005092A AP2009005092A AP2669A AP 2669 A AP2669 A AP 2669A AP 2009005092 A AP2009005092 A AP 2009005092A AP 2009005092 A AP2009005092 A AP 2009005092A AP 2669 A AP2669 A AP 2669A
Authority
AP
ARIPO
Prior art keywords
pressure vessel
composite pressure
end boss
boss
composite
Prior art date
Application number
AP2009005092A
Other languages
English (en)
Other versions
AP2009005092A0 (en
Inventor
Gunnar Axelsson
Peter Jenkins
Svein Are Lotveit
Original Assignee
Compressed Energy Technology As Co
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 Compressed Energy Technology As Co filed Critical Compressed Energy Technology As Co
Publication of AP2009005092A0 publication Critical patent/AP2009005092A0/en
Application granted granted Critical
Publication of AP2669A publication Critical patent/AP2669A/xx

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C13/00Details of vessels or of the filling or discharging of vessels
    • F17C13/06Closures, e.g. cap, breakable member
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2201/00Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05Size
    • F17C2201/056Small (<1 m3)
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602Wall structures; Special features thereof
    • F17C2203/0604Liners
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602Wall structures; Special features thereof
    • F17C2203/0612Wall structures
    • F17C2203/0614Single wall
    • F17C2203/0619Single wall with two layers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634Materials for walls or layers thereof
    • F17C2203/0658Synthetics
    • F17C2203/066Plastics
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2203/00Vessel construction, in particular walls or details thereof
    • F17C2203/06Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634Materials for walls or layers thereof
    • F17C2203/0658Synthetics
    • F17C2203/0663Synthetics in form of fibers or filaments
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2205/00Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305Bosses, e.g. boss collars
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2209/00Vessel construction, in particular methods of manufacturing
    • F17C2209/21Shaping processes
    • F17C2209/2109Moulding
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2209/00Vessel construction, in particular methods of manufacturing
    • F17C2209/22Assembling processes
    • F17C2209/228Assembling processes by screws, bolts or rivets
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2209/00Vessel construction, in particular methods of manufacturing
    • F17C2209/23Manufacturing of particular parts or at special locations
    • F17C2209/234Manufacturing of particular parts or at special locations of closing end pieces, e.g. caps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/01Pure fluids
    • F17C2221/013Carbone dioxide
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/03Mixtures
    • F17C2221/032Hydrocarbons
    • F17C2221/033Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2221/00Handled fluid, in particular type of fluid
    • F17C2221/03Mixtures
    • F17C2221/037Containing pollutant, e.g. H2S, Cl
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107Single phase
    • F17C2223/0123Single phase gaseous, e.g. CNG, GNC
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/035High pressure (>10 bar)
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17CVESSELS 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
    • F17C2223/00Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036Very high pressure (>80 bar)

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
AP2009005092A 2007-06-14 2008-06-13 End boss and composite pressure vessel AP2669A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20073034A NO20073034A (no) 2007-06-14 2007-06-14 Endeboss og en kompositt trykktank
PCT/NO2008/000214 WO2008153414A1 (en) 2007-06-14 2008-06-13 End boss and composite pressure vessel

Publications (2)

Publication Number Publication Date
AP2009005092A0 AP2009005092A0 (en) 2009-12-31
AP2669A true AP2669A (en) 2013-05-20

Family

ID=40020090

Family Applications (1)

Application Number Title Priority Date Filing Date
AP2009005092A AP2669A (en) 2007-06-14 2008-06-13 End boss and composite pressure vessel

Country Status (16)

Country Link
US (1) US8047396B2 (xx)
EP (1) EP2162669A1 (xx)
JP (1) JP5175926B2 (xx)
KR (1) KR101472616B1 (xx)
CN (1) CN101984763B (xx)
AP (1) AP2669A (xx)
AU (1) AU2008262691B2 (xx)
BR (1) BRPI0812714A2 (xx)
CA (1) CA2690927C (xx)
MX (1) MX2009013408A (xx)
MY (1) MY152142A (xx)
NO (1) NO20073034A (xx)
RU (1) RU2466329C2 (xx)
TN (1) TN2009000522A1 (xx)
WO (1) WO2008153414A1 (xx)
ZA (1) ZA201000172B (xx)

Families Citing this family (31)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5405884B2 (ja) * 2009-04-22 2014-02-05 株式会社日立製作所 ターボ機械のバレル型ケーシングとヘッドカバーの取付構造
US20130206778A1 (en) * 2010-02-01 2013-08-15 Sergei Vladimirovich Lukyanets Metal composite pressure cylinder
US8397938B2 (en) * 2010-03-10 2013-03-19 GM Global Technology Operations LLC Clamped liner-boss connection
KR101476615B1 (ko) * 2011-10-13 2014-12-26 현대비에스앤씨 (주) 가스 탱크
AU2011382799A1 (en) * 2011-12-05 2014-07-24 Blue Wave Co S.A. Type-4 tank for CNG containment
US20150136789A1 (en) * 2011-12-05 2015-05-21 Francesco Nettis Pressure vessel with composite boss
CN102494132B (zh) * 2011-12-06 2016-02-24 西安向阳航天材料股份有限公司 一种法兰接口的玻璃纤维缠绕水容器及其制造方法
CN103363293B (zh) * 2013-08-06 2015-04-08 北京天海工业有限公司 液化天然气低温绝热气瓶上的绝热法兰
CN103557431B (zh) * 2013-11-19 2016-03-30 四川川油天然气科技发展有限公司 单筒式储气井
CN103591451A (zh) * 2013-11-19 2014-02-19 四川川油天然气科技发展有限公司 大口径储气井
PL226196B1 (pl) * 2014-01-15 2017-06-30 Techplast Spółka Z Ograniczoną Odpowiedzialnością Kompozytowy zbiornik wysokocisnieniowy oraz sposob wytwarzania kompozytowego zbiornika wysokocisnieniowego
JP5985522B2 (ja) * 2014-01-28 2016-09-06 八千代工業株式会社 圧力容器
DE102014207069A1 (de) * 2014-04-11 2015-10-15 Bayerische Motoren Werke Aktiengesellschaft Anschlusselement für einen Drucktank sowie Drucktank
DE102014009342B4 (de) * 2014-06-27 2016-12-29 Kautex Textron Gmbh & Co. Kg Druckbehälter
CZ2014545A3 (cs) * 2014-08-15 2016-01-20 Hpc Research S.R.O. Plnicí/vypouštěcí systém pro kompozitní tlakové nádoby
US10928009B2 (en) * 2015-05-29 2021-02-23 eZcomply, LLC Pressure vessel boss and boss assembly apparatus and method
US9670979B1 (en) 2016-05-13 2017-06-06 Liquidspring Technologies, Inc. Resilient expandable pressure vessel
US11141930B1 (en) 2016-06-09 2021-10-12 Spencer Composites Corporation Method and tool for molding a composite pressure vessel liner to a boss
CN106122765B (zh) * 2016-08-24 2018-06-15 沈阳斯林达安科新技术有限公司 高分子材料内胆压力容器的密封结构
CN106610028A (zh) * 2017-01-06 2017-05-03 张家港市华地机械装备有限公司 电加热式cng加热器
US10753474B2 (en) * 2017-11-07 2020-08-25 Hexagon Technology As Blind boss fitting with redundant seal
US11173634B2 (en) 2018-02-01 2021-11-16 Ina Acquisition Corp Electromagnetic radiation curable pipe liner and method of making and installing the same
US10619794B2 (en) * 2018-03-13 2020-04-14 Ford Global Technologies, Llc Pressurized-fluid storage device
US10704728B2 (en) 2018-03-20 2020-07-07 Ina Acquisition Corp. Pipe liner and method of making same
CN110319346A (zh) * 2019-07-04 2019-10-11 利宾来塑胶工业(深圳)有限公司 一种具有瓶口密封结构的压力复合容器
CN111174083B (zh) * 2019-12-27 2021-12-28 东南大学 一种高压复合气瓶
CN111963890B (zh) * 2020-08-28 2022-07-15 亚普汽车部件股份有限公司 一种高压复合容器
DE102021105392A1 (de) 2021-03-05 2022-09-08 Maik Krause Anschlußsystem für CFK-Drucktank, CFK-Drucktank und Herstellverfahren
CN112855932A (zh) * 2021-03-05 2021-05-28 广州东部发展燃气有限公司 一种密封开关装置
CN113086439B (zh) * 2021-03-31 2022-04-29 浙江金象科技有限公司 压力容器导管固定结构
CN115076600A (zh) * 2022-06-16 2022-09-20 江苏国富氢能技术装备股份有限公司 一种高压氢瓶塑料内胆的瓶口结构

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5287988A (en) * 1993-02-03 1994-02-22 Brunswick Corporation Metal-lined pressure vessel
EP0693167A1 (en) * 1993-04-07 1996-01-24 EDO CANADA Ltd. Fluid pressure vessel boss-liner attachment system with liner/exterior mechanism direct coupling
US5938209A (en) * 1997-02-14 1999-08-17 Alternative Fuel Systems, Inc. Seal system for fluid pressure vessels
JP2000179795A (ja) * 1998-12-14 2000-06-27 Mitsubishi Chemicals Corp 耐圧容器の製造方法
RU2150634C1 (ru) * 1999-10-26 2000-06-10 Колдыбаев Сергей Глебович Устройство для герметизации патрубка внутренней оболочки в горловине сосуда высокого давления
RU2156399C1 (ru) * 1999-10-27 2000-09-20 Колдыбаев Сергей Глебович Сосуд высокого давления для текучей среды
JP2001304492A (ja) * 2000-04-19 2001-10-31 Mitsubishi Chemicals Corp 耐圧容器
JP2001317697A (ja) * 2000-05-08 2001-11-16 Mitsubishi Chemicals Corp 耐圧容器
CN1123371C (zh) * 2000-08-14 2003-10-08 孙传经 超临界二氧化碳高压萃取釜快开盖装置
RU2177583C1 (ru) * 2000-12-05 2001-12-27 Колдыбаев Сергей Глебович Устройство для герметизации патрубка
CZ298770B6 (cs) * 2002-02-15 2008-01-23 Tenkostěnná výstelka vysokotlaké nádoby
CN2637882Y (zh) * 2003-07-12 2004-09-01 刘信 密封装置
KR100469636B1 (ko) * 2004-03-11 2005-02-02 주식회사 케이시알 복합재료 고압용기용 고밀폐도 금속성 노즐보스
US7731051B2 (en) * 2005-07-13 2010-06-08 Gm Global Technology Operations, Inc. Hydrogen pressure tank including an inner liner with an outer annular flange
DE102006004121A1 (de) * 2006-01-25 2007-07-26 Hydac Technology Gmbh Druckbehälter
JP4392804B2 (ja) * 2007-04-06 2010-01-06 豊田合成株式会社 圧力容器
JP4599380B2 (ja) * 2007-09-04 2010-12-15 八千代工業株式会社 高圧容器のシール構造
US7857159B2 (en) * 2008-02-12 2010-12-28 Gm Global Technology Operations, Inc. Article seal assembly

Also Published As

Publication number Publication date
CN101984763B (zh) 2012-05-30
RU2010100958A (ru) 2011-07-20
TN2009000522A1 (en) 2011-03-31
RU2466329C2 (ru) 2012-11-10
EP2162669A1 (en) 2010-03-17
MY152142A (en) 2014-08-15
CN101984763A (zh) 2011-03-09
JP5175926B2 (ja) 2013-04-03
NO326109B1 (no) 2008-09-22
JP2010529391A (ja) 2010-08-26
ZA201000172B (en) 2010-09-29
WO2008153414A1 (en) 2008-12-18
CA2690927A1 (en) 2008-12-18
KR101472616B1 (ko) 2014-12-15
AP2009005092A0 (en) 2009-12-31
KR20100044172A (ko) 2010-04-29
AU2008262691B2 (en) 2014-09-25
MX2009013408A (es) 2010-01-29
US20100181325A1 (en) 2010-07-22
NO20073034A (no) 2008-09-22
CA2690927C (en) 2011-12-13
US8047396B2 (en) 2011-11-01
BRPI0812714A2 (pt) 2017-06-06
AU2008262691A1 (en) 2008-12-18

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