DK1007330T3 - Termoplastiske kompositprodukter og fremgangsmåde til foring af rørinstallation - Google Patents

Termoplastiske kompositprodukter og fremgangsmåde til foring af rørinstallation

Info

Publication number
DK1007330T3
DK1007330T3 DK97949062T DK97949062T DK1007330T3 DK 1007330 T3 DK1007330 T3 DK 1007330T3 DK 97949062 T DK97949062 T DK 97949062T DK 97949062 T DK97949062 T DK 97949062T DK 1007330 T3 DK1007330 T3 DK 1007330T3
Authority
DK
Denmark
Prior art keywords
pipe
liner
thermoplastic composite
lining pipe
pipe installation
Prior art date
Application number
DK97949062T
Other languages
Danish (da)
English (en)
Inventor
Gerard Stephen Boyce
Original Assignee
Yorkshire Water Services Ltd
Euro Projects Ltd
Sev Trent Water Ltd
Anglian Water Services Ltd
Ncc Danmark As
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 Yorkshire Water Services Ltd, Euro Projects Ltd, Sev Trent Water Ltd, Anglian Water Services Ltd, Ncc Danmark As filed Critical Yorkshire Water Services Ltd
Application granted granted Critical
Publication of DK1007330T3 publication Critical patent/DK1007330T3/da

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16LPIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1652Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
    • F16L55/1653Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being pressed into contact with the pipe by a tool which moves inside along the pipe
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C63/00Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/26Lining or sheathing of internal surfaces
    • B29C63/34Lining or sheathing of internal surfaces using tubular layers or sheathings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06Fibrous reinforcements only
    • B29C70/10Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/16Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/465Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating by melting a solid material, e.g. sheets, powders of fibres
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36Bending and joining, e.g. for making hollow articles
    • B29C53/38Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/40Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of definite length, i.e. discrete articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0809Fabrics
    • B29K2105/0836Knitted fabrics
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25Solid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Composite Materials (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Moulding By Coating Moulds (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
DK97949062T 1996-12-16 1997-12-16 Termoplastiske kompositprodukter og fremgangsmåde til foring af rørinstallation DK1007330T3 (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9626060.9A GB9626060D0 (en) 1996-12-16 1996-12-16 Thermoplastic composite products
PCT/GB1997/003453 WO1998026919A1 (en) 1996-12-16 1997-12-16 Thermoplastic composite products and method of lining pipework

Publications (1)

Publication Number Publication Date
DK1007330T3 true DK1007330T3 (da) 2003-06-10

Family

ID=10804498

Family Applications (1)

Application Number Title Priority Date Filing Date
DK97949062T DK1007330T3 (da) 1996-12-16 1997-12-16 Termoplastiske kompositprodukter og fremgangsmåde til foring af rørinstallation

Country Status (18)

Country Link
US (1) US6228312B1 (xx)
EP (1) EP1007330B1 (xx)
JP (1) JP4076188B2 (xx)
AT (1) ATE232789T1 (xx)
AU (1) AU723781B2 (xx)
CA (1) CA2273246C (xx)
CZ (1) CZ299249B6 (xx)
DE (1) DE69719223T2 (xx)
DK (1) DK1007330T3 (xx)
ES (1) ES2192702T3 (xx)
GB (1) GB9626060D0 (xx)
NO (1) NO318141B1 (xx)
NZ (1) NZ335971A (xx)
PL (1) PL185276B1 (xx)
PT (1) PT1007330E (xx)
TR (1) TR199901317T2 (xx)
WO (1) WO1998026919A1 (xx)
ZA (1) ZA9711266B (xx)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU760893B2 (en) * 1998-10-06 2003-05-22 United Bonded Fabrics Pty Ltd A polymer composite
FR2786429B1 (fr) * 1998-11-27 2001-01-19 Seva Procede de raccordement de deux tubes en materiau thermoplastique renforce
US6596121B1 (en) * 1999-11-04 2003-07-22 Hydril Company Method of making composite liner for oilfield tubular goods
JP4496614B2 (ja) * 2000-07-18 2010-07-07 横浜ゴム株式会社 ホットエアまたはホットガスによるタイヤのインフレーション成形方法
KR100379747B1 (ko) * 2000-07-22 2003-04-11 한국과학기술원 보호막을 갖춘 수지이송성형법을 이용한 하수관보수·보강 공법
GB0022921D0 (en) * 2000-09-19 2000-11-01 Sev Trent Water Ltd Lining ducts
US20040163724A1 (en) * 2001-09-06 2004-08-26 Mark Trabbold Formaldehyde-free duct liner
CA2459990A1 (en) * 2001-09-12 2003-03-20 Apache Products Company Composite foam products and method
EP1434962A4 (en) 2001-10-12 2010-11-24 Enpress L L C COMPOSITE PRESSURIZED ENCLOSURE ASSEMBLY AND CORRESPONDING METHOD
US7087296B2 (en) * 2001-11-29 2006-08-08 Saint-Gobain Technical Fabrics Canada, Ltd. Energy absorbent laminate
CN1329330C (zh) * 2002-03-13 2007-08-01 Ppg工业俄亥俄公司 掺加丝线粘合剂的纤维玻璃制品
WO2003081117A1 (en) * 2002-03-20 2003-10-02 Polyflow, Inc. Method for inserting a pipe liner
US7311964B2 (en) * 2002-07-30 2007-12-25 Saint-Gobain Technical Fabrics Canada, Ltd. Inorganic matrix-fabric system and method
FR2846345B1 (fr) * 2002-10-29 2004-12-10 Chomarat Composites Ruban de renforcement comportant une nappe de fils longitudinaux de haute tenacite
US20040173624A1 (en) * 2003-03-05 2004-09-09 Polymer & Steel Technologies Holding Company, L.L.C. Vessel diaphragm and method
EP1473502A1 (en) * 2003-05-02 2004-11-03 ALSTOM Power FlowSystems A/S A pipe with an internal coating
US7842769B1 (en) 2003-06-13 2010-11-30 Underground Solutions Technologies Group, Inc. Polyvinyl chloride formulations
US20050016450A1 (en) 2003-06-13 2005-01-27 Underground Solutions Technologies Group, Inc. System and arrangement for conduit reparation
US20050016608A1 (en) * 2003-06-13 2005-01-27 Underground Solutions Technologies Group, Inc. Fluid system for conduit expansion and mobile arrangement therefor
US6982051B2 (en) 2003-06-13 2006-01-03 Underground Solutions Technologies Group, Inc. Fusion process for conduit
US20050214527A1 (en) * 2004-03-29 2005-09-29 Dudick, Inc. Method for coating potable water tanks and coated structures for contact with potable water
GB0525505D0 (en) * 2005-12-14 2006-01-25 Chandler Brian B Sewer & water pipe lining
FR2903342B1 (fr) 2006-07-10 2010-01-15 Daher Lhotellier Aerotechnolog Dispositif thermodurcissable ou thermoplastique pour la fabrication de tuyauterie de conditionnement d'air
AU2008240102B2 (en) * 2007-04-13 2012-08-02 Underground Solutions Technologies Group, Inc. Conduit, manufacture thereof and fusion process therefor
CA2703836A1 (en) * 2007-09-24 2009-04-02 Cantex, Inc. Non-metallic raceway for wiring and fiber optic cable and method of forming raceway
JP5149741B2 (ja) * 2008-08-28 2013-02-20 吉佳エンジニアリング株式会社 既設管補修工法
DE602009001146D1 (de) * 2009-02-27 2011-06-09 Aarsleff As Auskleidungsanordnung zum Erneuern einer Rohrleitung durch Verwendung einer Auskleidung und eines transparenten Bandes
JP2010201887A (ja) * 2009-03-06 2010-09-16 Shonan Plastic Mfg Co Ltd 管ライニング材
JP2011121282A (ja) * 2009-12-10 2011-06-23 Sekisui Chem Co Ltd 既設管の更生方法
JP2011131411A (ja) * 2009-12-22 2011-07-07 Sekisui Chem Co Ltd ライニング材及びそのライニング材を使用した既設管の更生方法
JP5232803B2 (ja) * 2010-01-14 2013-07-10 エスジーシー下水道センター株式会社 配管補修方法およびその補修構造
WO2014130683A1 (en) 2013-02-20 2014-08-28 Crane Engineering, Inc. Self-obstructing flammable fluid carrying conduit
DE102014200130A1 (de) * 2014-01-08 2015-07-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren zum Reparieren oder Verstärken eines Hohlprofilabschnittes eines Kunststoffprofils
DE102014115996A1 (de) * 2014-11-03 2016-05-04 Hochschule Wismar Verfahren zum Einbringen und Verkleben von Fasern zur Verstärkung von Hohlprofilen und Vorrichtung zum Verstärken eines Hohlprofils
US11161294B2 (en) 2015-03-06 2021-11-02 Climate Recovery Ind Ab Method and apparatus for introducing a foil into an elongated duct and apparatus and method for laminating a foil to a duct
US9784388B1 (en) 2015-06-02 2017-10-10 Interstate Power Systems, Inc. Pipe liner for abrasive materials
GB2554431B (en) * 2016-09-27 2018-08-22 Aqualiner Ltd A pig for use in a system for lining ducts
EP3348379A1 (en) 2017-01-11 2018-07-18 OCV Intellectual Capital, LLC Dry liners for pipe repair and methods for manufacturing dry liners
EP3595853A4 (en) 2017-03-16 2020-12-23 Guerrilla Industries LLC COMPOSITE STRUCTURES AND PROCESSES FOR FORMING COMPOSITE STRUCTURES
US11173634B2 (en) 2018-02-01 2021-11-16 Ina Acquisition Corp Electromagnetic radiation curable pipe liner and method of making and installing the same
GB2571127B (en) 2018-02-19 2021-03-31 Aqualiner Ltd A pig for use in a system for lining ducts water or sewage pipes
US10704728B2 (en) 2018-03-20 2020-07-07 Ina Acquisition Corp. Pipe liner and method of making same
RU2752837C1 (ru) * 2021-02-16 2021-08-09 Общество с ограниченной ответственностью Специальное Конструкторское Бюро "Мысль" Способ ремонта обсадных труб в скважинах и устройство для его осуществления
US11572124B2 (en) 2021-03-09 2023-02-07 Guerrilla Industries LLC Composite structures and methods of forming composite structures
PL444005A1 (pl) * 2023-03-08 2024-09-09 Metalko Spółka Z Ograniczoną Odpowiedzialnością Proper do dociskania przyklejanych okładzin do wewnętrznej powierzchni rury

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4282905A (en) * 1978-09-01 1981-08-11 E. I. Du Pont De Nemours And Company Manufacture of seamless laminated tubing
GB2067612A (en) 1980-01-23 1981-07-30 Smith H R Fibre reinforced materials and methods of making and using them
JPS60132323U (ja) * 1984-02-14 1985-09-04 東京瓦斯株式会社 管路の内張り材
JPH0692121B2 (ja) * 1987-10-05 1994-11-16 東京瓦斯株式会社 管路の内張り材及びその製造方法
FR2628507B1 (fr) * 1988-03-11 1991-01-11 Peres Claudine Gaine de regeneration et/ou protection interieure ou exterieure de canalisations et procedes d'obtention de celles-ci
NL8902194A (nl) 1989-08-31 1991-03-18 Stamicarbon Weefsel van thermoplastische- en continue versterkingsvezel.
US5205886A (en) 1990-05-02 1993-04-27 Du Pont Canada Inc. Method of lining metallic pipe using concentric tubes of thermoplastic polymer and tear resistant material
US5176868A (en) * 1991-01-24 1993-01-05 Prince Manufacturing, Inc. Long fiber reinforced thermoplastic frame especially for a tennis racquet
US5213727A (en) * 1991-06-03 1993-05-25 American Pipe & Plastics, Inc. Method for installing a pipe liner
JPH05269726A (ja) * 1992-03-25 1993-10-19 Mitsui Constr Co Ltd 土木建築構造物補強材
DE4212448A1 (de) * 1992-04-14 1993-10-28 Basf Ag Verwendung von Hybridgarnen zur Herstellung konischer Faserverbundrohre
EP0664202B1 (en) * 1993-05-24 1999-09-22 Ashimori Kogyo Kabushiki Kaisha Repairing pipe, conduit repairing method using the same pipe, and repairing pipe removing method
US5380477A (en) * 1993-05-25 1995-01-10 Basf Corporation Process of making fiber reinforced laminates
GB9425503D0 (en) * 1994-12-17 1995-02-15 Wood John Method and apparatus for re-sizing thermoplastic pipes
DE19537702A1 (de) * 1995-10-11 1997-04-17 Hoechst Trevira Gmbh & Co Kg Gewebe und Gelege mit einstellbarer Gas- und/oder Flüssigkeitsdichtigkeit enthaltend Hybridgarne, Verfahren zu deren Weiterverarbeitung, textile Flächengebilde mit vorbestimmter Gas- und/durch Flüssigkeitsdurchlässigkeit und deren Verwendung

Also Published As

Publication number Publication date
AU7736998A (en) 1998-07-15
US6228312B1 (en) 2001-05-08
EP1007330A1 (en) 2000-06-14
ZA9711266B (en) 1998-06-23
NO992920D0 (no) 1999-06-15
JP4076188B2 (ja) 2008-04-16
NO992920L (no) 1999-08-12
EP1007330B1 (en) 2003-02-19
AU723781B2 (en) 2000-09-07
CZ299249B6 (cs) 2008-05-28
JP2001507639A (ja) 2001-06-12
GB9626060D0 (en) 1997-02-05
TR199901317T2 (xx) 2000-01-21
NZ335971A (en) 2000-11-24
PL185276B1 (pl) 2003-04-30
WO1998026919A1 (en) 1998-06-25
CZ216799A3 (cs) 1999-12-15
DE69719223T2 (de) 2003-12-04
ATE232789T1 (de) 2003-03-15
ES2192702T3 (es) 2003-10-16
PT1007330E (pt) 2003-07-31
NO318141B1 (no) 2005-02-07
DE69719223D1 (de) 2003-03-27
CA2273246C (en) 2006-10-24
CA2273246A1 (en) 1998-06-25

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