WO1991018234A1 - Tuyau sandwich de reparation pret a l'utilisation, utile pour renover l'interieur de canalisations endommagees, et son procede de fabrication - Google Patents

Tuyau sandwich de reparation pret a l'utilisation, utile pour renover l'interieur de canalisations endommagees, et son procede de fabrication Download PDF

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Publication number
WO1991018234A1
WO1991018234A1 PCT/EP1991/000904 EP9100904W WO9118234A1 WO 1991018234 A1 WO1991018234 A1 WO 1991018234A1 EP 9100904 W EP9100904 W EP 9100904W WO 9118234 A1 WO9118234 A1 WO 9118234A1
Authority
WO
WIPO (PCT)
Prior art keywords
resin
hose
tube
polyester
glass
Prior art date
Application number
PCT/EP1991/000904
Other languages
German (de)
English (en)
Inventor
Rolf Moll
Original Assignee
Softlining Ag, Systems For Relining
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 Softlining Ag, Systems For Relining filed Critical Softlining Ag, Systems For Relining
Publication of WO1991018234A1 publication Critical patent/WO1991018234A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices 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
    • F16L55/1656—Devices 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 materials for flexible liners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/10—Inorganic fibres
    • B32B2262/101—Glass fibres

Definitions

  • the presently described invention relates to a ready-to-use sandwich repair hose for the interior renewal of damaged sewer lines - in particular non-walkable ones - and a method for producing the same and its use.
  • An important technology used for this is based on inserting a flexible hose impregnated with reactive resin into the defective line and, after pressing the hose against the inner wall, curing the hose.
  • the patent literature shows a variety of generic methods: In the EP application, Ver. No. 0228998, a method and a device for the rehabilitation of installed pipelines are taught and claimed.
  • the multi-layer repair hoses are guided through rollers at normal pressure through a trough; they are to be soaked in reactive resin. After the impregnated hose has been laid in the line to be repaired, it is pressurized and cured by means of direct UV radiation or by means of a continuous device which emits high-energy radiation. Particular attention is paid to the insertion of the hose. According to the EP application discussed here, this process step can be carried out in at least two different ways.
  • FR patent application No. 7501 834 (Ver. No. 2258581) teaches a method for introducing a flexible hose for sealing installed gas lines.
  • the flexible, gas-tight hose is glued to the top inside of the line by means of glue.
  • the entire hose is not impregnated, nor is the hose hardened on the inner wall of the line.
  • the retracted flexible plastic hose is apparently pressed against the line by the gas pressure.
  • FR patent application 8303991 (Ver. No. 2542416) describes and claims a special, multi-layer, tight hose for the repair of existing lines.
  • One layer of the hose contains a thermally polymerizable mass and another electrically conductive fiber or fabric. After the flexible hose has been introduced into the line, it is inflated, the electrically conductive layer is supplied with current and the polymerization, i.e. stiffened the hose wall. The hose is usually not on the inside of the line; the leak must be specially sealed.
  • the process according to EP, Ver. No. 0082212 is a hose that is exposed to air pressure in a line to be repaired is turned in.
  • the tube has a felt layer that is evacuated during the everting process.
  • the resin mass for the entire impregnation and covering, and resin is constantly drawn into the evacuated felt mass and also pressed into the edge between the hose and the line.
  • the felt layer contains the catalyst to accelerate the curing of the resin. This method seems to be particularly suitable for vertical lines to be repaired from bottom to top, and the control of the felt impregnation without direct inspection and with an independent insertion speed of the hose and evacuation performance on the felt apparently does not lead to any difficulties.
  • Hose containing a photopolymerizable resin composition in a felt layer.
  • a roller At the inner end of the tubing that has been inserted and inflated or filled with water, there is a roller to which a cable for exposure devices is attached.
  • the watertight design of the exposure device appears to be essential.
  • US patent 4009063 is a method for impregnating, positioning and curing a repair hose containing a resin-impregnated fleece for laid lines.
  • U.S. Patent 4,439,469 teaches adding an initiator to the curable resins of the repair hoses according to the prior art.
  • US Patents 4581 247 and 4680066 the curing of the indented, resin-impregnated tube is also taught and claimed by means of a radiation robot that can be used, inter alia, in the induction liquid.
  • WO 89/01111 (PCT / CH 88/00122) teaches the optimization of such repair methods and the reinforcement to be used above all for bends and / or pipe extensions or constrictions.
  • Multilayer plastic hose to the inner surface of the pipe to be repaired
  • the ready-to-use sandwich repair hose according to the invention for the interior renewal of damaged sewer lines, in particular non-walkable ones, is characterized by: a) a mixed structure of the tube wall made of glass and polymer fibers, wherein - from the inside outwards - at least the following layers are present
  • Polyester / polyacrylate fiber layer in a weight ratio of 0.9 to 1.1 and with a density of 60 to 180 g.cm, the latter layer being needled onto the other layers,
  • the method is further characterized in that the resin-coated repair hose is stored in layers on plug-in pallets.
  • the use of the sandwich repair hose according to the invention for the interior renewal of damaged sewer lines, in particular non-walkable ones, is characterized in that - after insertion of the hose into the sewer line to be renewed and after securing the ends of the hose by means of suitable locks -
  • the inflation and blow-through medium in the hose is checked both in terms of pressure and temperature, and that
  • the curing is carried out in one pass of the UV exposure device.
  • the use is further characterized in that both The quantity and temperature of the inflation and blow-through medium are checked and displayed several times and that the UV exposure device is a self-driving robot which, in a first trip with the UV lamps switched off, the position of the inflated repair hose in the sewer line by means of TV transmission - reports to the control center, whereupon - after determining the correct position of the hose - the resin cures on command while the robot is returning with the UV lamps switched on, with multiple checks of its speed and the outlet temperature of the inflation and blowing medium .
  • All of the systems and devices mentioned are further characterized in that they have the necessary control, measuring, regulating, display, drive and braking devices for the purpose of achieving a coordinated overall operation of the interior renewal or a coordinated sequence the interior renewal are equipped.
  • the same systems and devices can even have an automatic system which allows programming of the operation or renewal sequence.
  • FIGS. 1 to X the drawings relating to a preferred embodiment of the subject matter of the invention.
  • FIG. 1 shows the basic structure of the sandwich hose wall according to the invention in a sectional view:
  • 1.01 denotes the flared seam reinforcement strip; this is 50 to 200 mm wide and 1 to 5 mm high; it consists of a glass rowing fabric.
  • 1.02 denotes a fleece made of polyacrylic fibers from 120 to -3 180 g «cm, 1.03 denotes a glass fiber mat, ECR glass,
  • 1.04 denotes the polyester / polyacrylic fiber mat in a weight ratio of 0.9 to 1.1 and with a density of 0.2 to
  • 1.05 denotes the glass rowing fabric made of ECR glass
  • 1.06 denotes the polyester / polyacrylate fiber layer, in a weight ratio of 0.9 to 1.1 and with a density of
  • the wall thicknesses of glass fiber outer layers to the polyester / polyacrylate fiber mat in between are preferably:
  • FIGS. 3 and 4 are shown.
  • the flow direction in FIGS. 2A and 2B is from left to right.
  • the bobbin with the wound multi-layer hoses is brought to the unwinding unit 2A01 or 2B01 and prepared there for unrolling the multi-layer hose.
  • the beginning of the hose will unwound and fastened on the transport rollers by the Einharzeinrich ⁇ device 2A02, or 2B02 with resin tub 2A03 and Einharzurm 2A04. These transport rollers are driven by 2 chains.
  • the layer of mat, fabric or knitted fabric lying outside in the multi-layer hose is impregnated with resin; Excess resin is squeezed out when the hose exits the resin device.
  • the hose runs through the resin tower in the facility.
  • the resin-impregnated hose reaches the processing table 2A05 or 2B05 from the resin device.
  • This is designed as a conveyor table, i.e. it has table tracks movable in the longitudinal direction.
  • the UV-impermeable cover of the future repair hose is unwound in cutting device 2A06 or 2B06, cut to the desired width and placed flush and centrally under the resin-coated hose.
  • 2B06 pick-up and deflection rollers 2B07 are provided at the beginning of the processing table.
  • the casing is then placed around the resin-coated hose by means of funnel-shaped guide plates in such a way that its outer cutting edges come to lie against one another in the middle above it.
  • the 2A07 plastic welding system which is adjustable in three axes (height, table! Longitudinal and table transverse axis) at the end of the table, feeds a strip of material that can be thermally welded to the cover material over the open seam of the two cover edges welds this thermally to the two edges of the casing material.
  • the welding takes place with the extraction of air and gases, so that practically no air pockets result in the resin-impregnated hose during this operation.
  • the welding system 2A07 is moved and positioned by means of spindle motors.
  • the hot air hair dryer is also controlled from the desk based on the temperature of the air emerging; the temperature is kept constant by means of an appropriate control.
  • the control of the single resin and encircling line takes place overall via a stationary control panel or, with regard to main functions, via a mobile control button.
  • Main functions such as setting up and exiting can be controlled both automatically and manually on the control panel.
  • Complete automatic control with an optimized basic setting can also be switched.
  • FIG. 3 shows the resin device with resin trough 301 and resin resin tower 302.
  • the negative pressure in the tower above the resin, the speed of the drive rollers and the conveyor chains and thus the resin time are regulated (at maximum speed the conveyor device also serves because of their special shape as a mixing device for the resin) and the distance between the squeezing rollers 303 when the hose exits the resin bath. This distance is indicated and controllable with vernier.
  • the open part of the resin trough of the single resin device 2A02 can, according to FIG. 4, be covered and have both a large 402 in the cover 401 and - on the opposite side - a smaller opening 403.
  • the cover can be connected to an exhaust system by means of a line (not shown), which discharges the extracted air through an activated carbon filter.
  • An analog device can also be provided over the entire processing table.
  • FIG. 5 shows the storage of the repair hose 5.01 ready for use on plug-in stacking pallets 5.02.
  • the hose is thus transported and stripped from the pallets in layers on the construction site and inserted into the sewer line to be repaired.
  • FIG. 6 shows schematically the use of the hose termination according to the invention for the interior renewal of a damaged sewer line, especially the safety measures when inflating and curing:
  • 6.02 denotes the compressor block in the diagram; 6.02a is the air inlet with intake filter.
  • the performance data of the compressor for example a
  • Compressed air line after the compressor, a safety valve and a manual steep valve are provided.
  • Block 6.04 denotes the air cooler, with compressed ambient air serving as the coolant.
  • the condensed water is removed from the cooled compressed air in a separator with an automatic drain valve.
  • the entire complex control system for securing the pressure and the amount of the inflation and blowing medium primarily serves the purpose of not reaching the lower explosion limit of such mixtures, even if small amounts of organic substances escape from the repair hose into the compressed air.

Abstract

Un nouveau tuyau sandwich de réparation prêt à l'utilisation, utile pour rénover l'intérieur de canalisations endommagées, notamment de canalisations inaccessibles, comprend les couches suivantes: un non-tissé en fibres de polyacryle de 120 à 180 g.cm-3; une natte en fibres de verre, en verre ECR; une natte en fibres de polyester/polyacryle ayant un rapport en poids compris entre 0,9 et 1,1 et une masse volumique comprise entre 0,2 et 0,4 g.cm-3, en tant que support proprement dit de la résine; un tissu stratifil de verre, de verre ECR; et une couche en fibres de polyester/polyacrylate, ayant un rapport en poids compris entre 0,9 et 1,1 et une masse volumique comprise entre 60 et 180 g.cm-3, cette dernière couche étant épinglée sur les autres couches. Le remplissage en résine est avant tout contenu dans la natte en fibres de polyester/polyacryle, la résine étant une résine de polyester durcissable aux UV. Une pellicule armée en polyéthylène de couleur noire sert d'enveloppe extérieure et une pellicule en polyamide ayant une température élevée de fusion, résistante au styrol et transparente aux UV sert d'enveloppe intérieure de protection. Afin d'obtenir une imprégnation optimale avec la résine, le procédé de fabrication de ce nouveau tuyau sandwich de réparation comprend les étapes suivantes: afin de précharger le tuyau de réparation soudé, pourvu de l'enveloppe intérieure en polyamide, le tuyau traverse un bain de résine à une température comprise entre 10 et 40°C; le tuyau préchargé est désaéré sous une pression réduite comprise entre 0,1 et 0,8 bar; le tuyau est chargé une deuxième fois dans un bain de résine, dans lequel il est comprimé; et le tuyau chargé est appliqué sur l'enveloppe extérieure armée, qui est rabattue et soudée sur le tuyau.
PCT/EP1991/000904 1990-05-18 1991-05-14 Tuyau sandwich de reparation pret a l'utilisation, utile pour renover l'interieur de canalisations endommagees, et son procede de fabrication WO1991018234A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH169690 1990-05-18
CH1696/90-9 1990-05-18

Publications (1)

Publication Number Publication Date
WO1991018234A1 true WO1991018234A1 (fr) 1991-11-28

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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0510306A1 (fr) * 1991-04-20 1992-10-28 TEERBAU GmbH Procédé et dispositif pour fabrication d'un tuyau plastique armé durcissable
DE19709350C1 (de) * 1997-03-07 1998-05-28 Rothenberger Rohrsanierung Gmb Verfahren und Vorrichtung zum Herstellen eines Schlauchs für die Auskleidung von Rohrleitungen und Kanalsystemen
DE19741340C1 (de) * 1997-09-19 1998-11-12 Rothenberger Rohrsanierung Gmb Verfahren zum Herstellen eines mit einem aushärtbaren Harz imprägnierbaren Schlauchs für die Auskleidung von Rohrleitungen und Kanalsystemen
AT404500B (de) * 1996-05-03 1998-11-25 Kuebel Johann Einsatzteil und verfahren zum sanieren der undichten wände von leitungen unter verwendung eines solchen einsatzteiles
WO1999011966A1 (fr) * 1997-09-04 1999-03-11 Texon Uk Limited Revetement utilise pour renover des tuyaux
WO2000073692A1 (fr) * 1999-05-27 2000-12-07 Betz, Wilhelm, Leo Gaine comportant une couche de non tisse appliquee sur un film tubulaire
WO2005047758A1 (fr) * 2003-11-07 2005-05-26 Insituform (Netherlands) B.V. Tour d'impregnation de resine pour doublure durcie sur place
US7112254B1 (en) 2003-11-07 2006-09-26 Insituform (Netherlands) B.V. Installation of cured in place liner with inner impermeable layer and apparatus
EP1772258A1 (fr) * 2005-10-06 2007-04-11 J. H. Ziegler GmbH & Co. KG Stratifié non-tissé infiltrable par une composition thermoplastique pour la préparation de pièces renforcées
US7261788B1 (en) 2003-11-07 2007-08-28 Insitaform (Netherlands) B.V. Preparation of cured in place liner with integral inner impermeable layer
EP1920912A1 (fr) * 2006-11-06 2008-05-14 Per Aarsleff A/S Dispositif de revêtement d'un tuyau
EP1920913A1 (fr) * 2006-11-06 2008-05-14 Per Aarsleff A/S Ensemble linéaire, tube linéaire, ensemble linéaire composite et tube linéaire solidifié
US7766048B2 (en) 2004-11-03 2010-08-03 Ina Acquisition Corp. Installation of cured in place liners with air and flow-through steam to cure
US7857932B1 (en) 2003-11-07 2010-12-28 Ina Acquisition Corp. Cured in place liner with everted outer impermeable layer and method of manufacture
DE102011105592A1 (de) * 2011-06-27 2012-12-27 Sml Verwaltungs Gmbh Auskleidungsschlauch zur Sanierung fluidführender Systeme
EP2573442B1 (fr) 2011-09-23 2015-12-30 Saertex multicom GmbH Revêtement interne

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2113608A (en) * 1982-01-21 1983-08-10 Coopetanche Sa Composite materials and internal lining sheaths for conduits or ducts made of such materials
US4581247A (en) * 1984-01-05 1986-04-08 Insituform International N.V. Lining of pipelines and passageways
WO1989001111A1 (fr) * 1987-07-29 1989-02-09 Softlining Ag, Systems For Relining Processus de renovation de l'interieur de conduits inaccessibles
DE3819657C1 (fr) * 1988-06-09 1989-07-20 Saerbeck-Textil Wagener Kg, 4401 Saerbeck, De

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2113608A (en) * 1982-01-21 1983-08-10 Coopetanche Sa Composite materials and internal lining sheaths for conduits or ducts made of such materials
US4581247A (en) * 1984-01-05 1986-04-08 Insituform International N.V. Lining of pipelines and passageways
US4581247B1 (en) * 1984-01-05 1995-03-07 Insituform Netherlands Bv Lining of pipelines and passageways
WO1989001111A1 (fr) * 1987-07-29 1989-02-09 Softlining Ag, Systems For Relining Processus de renovation de l'interieur de conduits inaccessibles
DE3819657C1 (fr) * 1988-06-09 1989-07-20 Saerbeck-Textil Wagener Kg, 4401 Saerbeck, De

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0510306A1 (fr) * 1991-04-20 1992-10-28 TEERBAU GmbH Procédé et dispositif pour fabrication d'un tuyau plastique armé durcissable
AT404500B (de) * 1996-05-03 1998-11-25 Kuebel Johann Einsatzteil und verfahren zum sanieren der undichten wände von leitungen unter verwendung eines solchen einsatzteiles
DE19709350C1 (de) * 1997-03-07 1998-05-28 Rothenberger Rohrsanierung Gmb Verfahren und Vorrichtung zum Herstellen eines Schlauchs für die Auskleidung von Rohrleitungen und Kanalsystemen
WO1999011966A1 (fr) * 1997-09-04 1999-03-11 Texon Uk Limited Revetement utilise pour renover des tuyaux
DE19741340C1 (de) * 1997-09-19 1998-11-12 Rothenberger Rohrsanierung Gmb Verfahren zum Herstellen eines mit einem aushärtbaren Harz imprägnierbaren Schlauchs für die Auskleidung von Rohrleitungen und Kanalsystemen
WO2000073692A1 (fr) * 1999-05-27 2000-12-07 Betz, Wilhelm, Leo Gaine comportant une couche de non tisse appliquee sur un film tubulaire
US6679966B1 (en) 1999-05-27 2004-01-20 Joachim Brandenburger Liner with a tubular film that is coated with a nonwoven
JP2007516861A (ja) * 2003-11-07 2007-06-28 アイエヌエイ アクイジション コーポレーション 現場硬化型ライナー用樹脂含浸タワー
US7857932B1 (en) 2003-11-07 2010-12-28 Ina Acquisition Corp. Cured in place liner with everted outer impermeable layer and method of manufacture
WO2005047758A1 (fr) * 2003-11-07 2005-05-26 Insituform (Netherlands) B.V. Tour d'impregnation de resine pour doublure durcie sur place
US7238251B1 (en) 2003-11-07 2007-07-03 Insituform (Netherlands) B.V. Method of preparing cured in place liner using resin impregnation tower
US7261788B1 (en) 2003-11-07 2007-08-28 Insitaform (Netherlands) B.V. Preparation of cured in place liner with integral inner impermeable layer
NO339436B1 (no) * 2003-11-07 2016-12-12 Ina Aquisition Corp Harpiksimpregneringstårn for vulkanisert på stedet kledning
US7112254B1 (en) 2003-11-07 2006-09-26 Insituform (Netherlands) B.V. Installation of cured in place liner with inner impermeable layer and apparatus
US7766048B2 (en) 2004-11-03 2010-08-03 Ina Acquisition Corp. Installation of cured in place liners with air and flow-through steam to cure
EP1772258A1 (fr) * 2005-10-06 2007-04-11 J. H. Ziegler GmbH & Co. KG Stratifié non-tissé infiltrable par une composition thermoplastique pour la préparation de pièces renforcées
EP1920913A1 (fr) * 2006-11-06 2008-05-14 Per Aarsleff A/S Ensemble linéaire, tube linéaire, ensemble linéaire composite et tube linéaire solidifié
EP1920912A1 (fr) * 2006-11-06 2008-05-14 Per Aarsleff A/S Dispositif de revêtement d'un tuyau
DE102011105592A1 (de) * 2011-06-27 2012-12-27 Sml Verwaltungs Gmbh Auskleidungsschlauch zur Sanierung fluidführender Systeme
WO2013000556A2 (fr) 2011-06-27 2013-01-03 Sml Verwaltungs Gmbh Gaine de chemisage pour la rénovation de systèmes de transport de fluides
EP2573442B1 (fr) 2011-09-23 2015-12-30 Saertex multicom GmbH Revêtement interne
US9829142B2 (en) 2011-09-23 2017-11-28 Saertex Multicom Gmbh Internally coated liner

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