Abstract: Stretch-resistant liners for lining pipes, pipes lined with stretch-resistant liners, and methods for lining pipes with stretch-resistant liners. The liners are made from a lamination that includes a sealing layer, a strength layer of stretch-resistant woven material that overlies the sealing layer, a support layer of non-woven resin-impregnated material that overlies the strength layer, and a barrier layer that overlies the support layer. The lamination is rolled into a tube and inverted when inserted into a pipe so that the barrier layer is the layer that abuts the interior wall of the pipe, the support layer underlies the barrier layer, the strength layer underlies the support layer and the sealing layer underlies the strength layer is contacted by materials flowing through the pipe.

Abstract: Devices, apparatus, systems and methods for forming rolled up spiral shaped tubular inserts of interlocking seams of elongated strip material and for inserting the inserts into damaged channels such as culverts, sewer lines, pipes, and the like. The inserts are released to expand outward and unravel until the walls of the unraveling insert abut against interior walls of the damaged channel forming a protective interior wall for the damaged channel. One side of the insert strips can have a hook, and an opposite side of the strips can have a longitudinal groove wherein the hook attaches to and slides within the groove. Slidable surfaces such as bushings, Teflon coatings and O-rings can be used along the interlocking seams to allow for reduced friction as the strip materials are rolled into contracted positions and later expanded out.

Abstract: A liner tube for repairing existing pipes is provided. The liner tube is sufficient flexible to lie substantially flat under its own weight thereby defining an upper portion and a lower portion. The liner tube includes an inner layer, an outer layer disposed around the inner layer, a first intermediate layer disposed between the inner layer and the outer layer, the first intermediate layer being wrapped around the inner layer to overlap itself and define a first overlap portion in the upper portion, and a second intermediate layer disposed between the first intermediate layer and the outer layer, the second intermediate layer being wrapped around the first intermediate layer to overlap itself and define a second overlap portion in the lower portion. The first and second intermediate layers include a porous material and the inner layer includes material substantially impermeable to liquids. Systems used to manufacture the liner tube are also provided.

Abstract: A pit liner includes an upper section, a lower section, at least one pin wherein each pin is connected to one of the upper section and the lower section, and at least one notch defined in at least one of the upper section and the lower section the lower section and the upper section sized to adjust with respect to each other.

Abstract: A kit, apparatus, and method for sealing a junction between a manhole and a pipe within a sewer system are provided. In a first embodiment, the end of a pipe adjacent a manhole is sealed by the use of a pipe liner and a tubular sleeve made of a hydrophilic material. In a second embodiment, a majority of the area surrounding a junction of a pipe and a manhole is sealed by the use of a tubular sleeve made of a hydrophilic material including a flange portion, a pipe liner, and a manhole liner.

Abstract: A liner or core pipe which is suitable for insertion into a host pipe, the core pipe including, in certain aspects, a pipe made of temperature-resistant corrosion-resistant material and having an outer surface, an inner surface, a first end and a second end and a flow channel therethrough from the first end to the second end; first and second strengthening wraps around the pipe; a plurality of spaced-apart pulling tapes on the pipe; the pipe deformable to facilitate insertion into a host pipe, and a protective outer wrap on the pipe. This abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure and is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims, 37 C.F.R. 1.72(b).

Abstract: A rehabilitating pipe segment for assembling a rehabilitating pipe inside an existing pipe. The rehabilitating pipe segment has first and second segment halves connectable together to provide for the rehabilitating pipe segment an internal surface plate and side and end plates surrounding peripheral edges of the internal surface plate. The first and second segment halves are configured to move relative to one another in a width direction of the rehabilitating pipe segment corresponding to a pipe length direction of the rehabilitating pipe so that the first and second pipe segment halves expand and contract to make the width of the rehabilitating pipe segment variable in the width direction of the rehabilitating pipe segment.

Abstract: A device and method for rehabilitating pipe connections is disclosed that simplifies the reliable transportation and positioning of a pipe lining relative to a junction region of a building service line to be lined. The device and method provides for rehabilitating the junction of a building connection from a main pipeline into the building service line. With a positioning device, a curable pipe lining may be positioned at the junction of the building service line and the main line and, with a transport device, the positioning device and the pipe lining may be transported to the junction. A detecting device may detect an extended position of the positioning device. The detecting device may include a winding box with a switch that is actuated when a cord has been pulled out of the winding box and which triggers a signaling device.

Abstract: An apparatus and method is provided for lining the wall of a manhole. The apparatus may include a liner assembly, which includes an expansion device, an auxiliary bladder, a primary bladder, and a liner. The auxiliary bladder is first inflated near the top of the manhole. Next the primary bladder may be expanded to press the liner against the wall of the manhole. The liner, being impregnated with a resinous material, is pressed against the wall until the resinous material cures and hardens. The expansion device, auxiliary bladder, and primary bladder are then removed from the manhole. The result is a repaired manhole wall.

Abstract: Devices, apparatus, systems and methods for forming rolled up spiral shaped tubular inserts of interlocking seams of elongated strip material and for inserting the inserts into damaged channels such as damaged culverts, sewer lines, pipes, and the like. The inserts are released to expand outward and unravel until the walls of the unraveling insert abut against interior walls of the damaged channel forming a protective interior wall for the damaged channel. One side of the insert strips can have a hook, and an opposite side of the strips can have a longitudinal groove wherein the hook attaches to and slides within the groove. Slidable surfaces such as bushings, Teflon coatings and O-rings can be used along the interlocking seams to allow for reduced friction as the strip materials are rolled into contracted positions and later expanded out.

Abstract: Method for renewal or rehabilitation of water supply pipelines without the need for excavation of the pipes or associated side inlets, manholes, etc., wherein plug arrangements are installed in side inlets, a flexible hose applied with adhesive is threaded into the water supply pipeline, and certain pressure is maintained for a predetermined period of time in order to get the adhesive material hardened and the hose glued to the inner pipe wall, and wherein the mounted plug arrangements are removed. A special plug arrangement for use in said method is also provided.

Abstract: A construction element of reinforced-concrete panel (1) in which is embedded a reinforcement framework includes at least one main framework layer extending along a tensioned outer face (11) of the element (1) and to which an inner framework (3) is attached for securing to the concrete, extending to the thickness of the element (1), the latter being produced, after the placement of the reinforcement framework, by pouring concrete onto a thin continuous wall (2) forming a sacrificial formwork. The thin wall (2) forming the sacrificial formwork extends along the tensioned face (11) of the element (1) and at the same time forms the main framework layer of the element (1), the nature and thickness of the thin wall (2) being determined so as to withstand the tensile stresses generated by the forces applied to the element (1) without the risk of separation from the concrete.

Abstract: An apparatus for lining a pipe, comprising a support structure, a liner secured to the support structure and having a non-everted portion and an everted portion, and a pressure connector secured to the everted portion of the liner. The pressure connector includes a connector stud positioned in an opening of the everted portion of the liner, an inner pinch plate positioned inside the liner adjacent the opening, an outer pinch plate positioned outside the liner adjacent the opening and in opposing relation to the inner pinch plate, and a compression mechanism forcing the outer pinch plate toward the inner pinch plate. Preferably, the connector stud includes splines, and the outer pinch plate includes grooves receiving the splines. The compression mechanism can include a reaction plate coupled to the connector stud and including a threaded hole engaged with a threaded member.

Abstract: Disclosed is a system for extracting heat from an effluent duct (2), in particular a wastewater collection device, comprising, in the zones of the inner duct wall located above the effluent, heat exchanger tubes (3) which are exposed to the atmosphere in the duct and through which a heat transfer fluid flows to recover some of the sensible heat and of the latent condensation heat from the steam generated by the effluent. A forced-convection device (9) is provided to generate a movement of air sweeping across the surface of the effluent (1) and increase the evaporation rate of the effluent.

Abstract: The present invention includes a device and method for reinforcing the portions of an inflation bladder not contained by a liner in pipeline renewal applications. A liner/bladder assembly is provided wherein the liner is positioned relative to the bladder such that a portion of the bladder having a greater wall thickness extends beyond the ends of the liner. The present invention also includes a device and method for repairing the junction of a main pipe and the lateral pipe with bladders reinforced in areas unconstrained by the liners.

Abstract: An existing-pipe rehabilitation method for constructing a rehabilitation pipe inside an existing pipe to rehabilitate the existing pipe. A rehabilitation pipe is constructed inside an existing pipe by coupling segments in the circumferential direction and the lengthwise direction of the existing pipe so that the rehabilitation pipe has a constant outer diameter. A lining material impregnated with a liquid curable resin is inserted into the rehabilitation pipe thus constructed. The liquid curable resin is cured to line the internal circumferential surface of the rehabilitation pipe with the lining material so that an inner diameter of the rehabilitation pipe lined with the lining material is smaller than an inner diameter of the existing pipe.

Abstract: In an embodiment, a shaping frame (2) of a pipe producing apparatus (1) includes a plurality of linking bodies (20) in which a pair of linking elements (21, 22) are rotatably coupled via a coupling shaft (23), a bending link (30) with opposite ends of which coupling elements are rotatably coupled via coupling shafts (23) and which expands or contracts the shaping frame (2), a drive unit (40) with opposite ends of which coupling elements (25, 25) are rotatably coupled via coupling shafts (23) and which forcedly sends out a profile strip (100) from the inside, and a joint unit (80) with opposite ends of which coupling elements (21, 22) are rotatably coupled via coupling shafts (23) and which is provided at a joint portion (120) of a winding of the profile strip.

Abstract: Disclosed is a method and apparatus for use in a fusion process for conduit. The method includes: heating and melting at least a portion of the terminal edges of the first conduit portion and the second conduit portion; and butt fusing the melted terminal edge of the first conduit portion with the melted terminal edge of the second conduit portion, thereby creating a fused joint area. A fusion apparatus for employing this method is also disclosed.

Abstract: Mortar-coated steel pipe comprise a steel cylinder having a mortar layer disposed therein, such mortar layer being free of any metallic reinforcement. An overcoat is disposed over the mortar layer and is formed from a material that is a dielectric and/or a barrier to moisture and oxygen entering the mortar layer, e.g., a polymeric material. The pipe may include a further concrete or mortar layer disposed over the overcoat, forming an outermost pipe surface. The outer layer can be cement, mortar, or other material. The mortar layer thickness is about 2 to 30 mm, the overcoat thickness is about 0.1 to 2 mm, and any outer layer thickness is about 1.2 to 4 cm. The pipe is made by compression coating method, where mortar layer and overcoat are applied simultaneously. When an outer layer is desired, it is preferably applied at the same time as the mortar layer and overcoat.

Abstract: A lateral liner assembly provides for sealing of the junction between a lateral sewer line and a main sewer pipe. The lateral liner assembly includes a body portion attached to a collar portion. A flange assembly is secured to the collar to provide a rigid base for a seal. The seal supported on the flange seals against the inner surface of the main sewer pipe. The seal provides a desired water tight seal for the junction between the main sewer line and the lateral sewer line.

Abstract: Methods of reel-laying a mechanically lined pipe (MLP) are described. These include the steps of: spooling the MLP (12) onto a reel (10) in the complete or substantial absence of internal pressure above ambient pressure in the MLP; spooling off the MLP from the reel; aligning and straightening the spooled off MLP, in the complete or substantial absence of internal pressure above ambient pressure, to provide an MLP for laying; and/or the steps of: spooling the MLP (12) onto a reel (10) resulting in the formation of wrinkles in the spooled MLP; spooling off the MLP from the reel; aligning and straightening the unspooled MLP to provide an MLP for laying having wrinkles <4 mm high, removing wrinkles, if any, whilst performing the hydrotest which is used to check fluid tightness of the line.

Abstract: This invention relates to a method for replacing pipes, and an apparatus therefor. The method utilizes a cable which is passed along an existing pipe. The cable is connected to a component at the end of the pipe, the component also being connected to a length of replacement pipe. The cable is pulled whereby the existing pipe is removed and the replacement pipe inserted in its place. The invention is expected to achieve its greatest utility as a method and apparatus for replacing pipes carrying water or gas to domestic and commercial properties.

Abstract: A method of forming a lining in a passageway, by placing or disposing or inverting or everting into the passageway a tube having a port and made from a material containing a curable resin so that the port passes at least partially through the passageway; and creating an opening in the tube to produce a flow path between the port and the inside of the tube. Additionally, inserting a pipe or hose into a conduit of the port; sealing the conduit around the pipe or hose, draining or exhausting fluid out from the inside of the tube through the port and the pipe or hose and/or circulating a fluid through the inside of the tube via the port and the pipe or hose may also be performed.

Abstract: An eversion and installation device and method for in-pipe use to line an underground pipe with a resin impregnated lining tube. A pressure vessel has a slotted gasket and a flapper, along with rollers allowing a collapsed lining tube to be extended into and through the vessel and cuffed and secured to the leading end of the vessel. The vessel is then lowered through a manhole passage onto the floor or trough of the pipe before fluid pressure is applied to evert the tube into the pipe.

Abstract: Segments are linked in the circumferential and pipe length directions to assemble a rehabilitating pipe inside an existing pipe in order to rehabilitate the existing pipe. A plurality of nuts are secured to the segments along the circumferential direction thereof. A fastening member having a screw part is provided which is screwed into the nut to fasten a first segment to a second segment to which the nut is secured, thereby linking the first and second segments in the pipe length direction thereof. The position of the nut in the first segment is offset as viewed in the circumferential direction from the nut position of the second segment. The arrangement of the fastening members and the nuts is staggered as viewed in its entirety. This allows the connection strength of the segments in the pipe length direction to be made uniform.

Abstract: A kit, apparatus, and method for sealing a junction between a manhole and a pipe within a sewer system are provided. In a first embodiment, the end of a pipe adjacent a manhole is sealed by the use of a pipe liner and a tubular sleeve made of a hydrophilic material. In a second embodiment, a majority of the area surrounding a junction of a pipe and a manhole is sealed by the use of a tubular sleeve made of a hydrophilic material including a flange portion, a pipe liner, and a manhole liner.

Abstract: A kit, apparatus, and method for sealing a junction between a manhole and a pipe within a sewer system are provided. In a first embodiment, the end of a pipe adjacent a manhole is sealed by the use of a pipe liner and a tubular sleeve made of a hydrophilic material. The tubular sleeve is held in place by a mechanical fastener and a pipe liner is installed or otherwise placed through the tubular sleeve and against the wall of the pipe. In a second embodiment, a majority of the area surrounding a junction of a pipe and a manhole is sealed by the use of a tubular sleeve made of a hydrophilic material including a flange portion, a mechanical fastener, a pipe liner, and a manhole liner.

Abstract: A method of patching a well or a pipe by hydroforming a tubular metal patch. A tool provided with a pair of inflatable packers is inserted inside the patch. The pair of inflatable packers are axially spaced apart from each other by a distance that is substantially equal to the length of the patch. The tool is positioned inside the patch so that the packers are in register with the end portions of the patch. The assembly of the tool and the patch is axially inserted inside the well or the pipe, and positioned in register with the zone for patching. The packers are inflated to a high pressure, sufficient for radially expanding the end portions of the patch and pressing them in a leak-tight manner against the wall of the well or the pipe. The packers are subsequently deflated and the tool is withdrawn. The method is applicable to the oil industry.

Abstract: A method and apparatus for lining a pre-existing pipe or passage having at least one curved section or bend along its length with a pipe assembly (10) is disclosed. An assembly is formed from a plurality of pipe sections (11), having axial ends (15,16) which are inclined at non-orthogonal angles (x) with respect to the longitudinal axis of the sections, and having interengagement means, placed end-to-end and engaged together. The pipe assembly is advanced into the passage or pre-existing pipe, pipe sections being vibrated such that the relevant pipe sections rotate relative to one another towards a relative orientation in which the axes of adjacent pipe sections within a curved section of pre-existing pipe or passage lie inclined at an angle to one another such that the pipe assembly can be advanced through the pre-existing pipe or passage.

Abstract: In an existing pipe rehabilitating method according to an embodiment, a profile strip (2) for lining an existing pipe (10) is shaped using a thermoplastic resin, joint portions (21) are provided at both end portions in a width direction of the profile strip, and the profile strip (2) is inserted into the existing pipe (10) and is helically wound in the existing pipe (10). The joint portions (21) of adjacent windings of the profile strip (2) are interlocked with each other, thereby forming a rehabilitating pipe (20). Also, the profile strip (2) of the rehabilitating pipe (20) is deformed by a heating step in which the profile strip (2) is subjected to a heating process so as to conform a shape of a curved portion (13) of the existing pipe (10), thereby integrating the profile strip (2) with an inner peripheral surface of the curved portion (13) of the existing pipe (10).

Abstract: In a connection structure (A) for a manhole pipe (1) and sewer main pipe (2) in which the sewer main pipe (2) places one end at a circular opening (12) of the manhole pipe (1) through a flexible coupler (F), the flexible coupler (F) has a rubber coupler body (3). Around an inner surface of the rubber coupler body (3), there is provided a water-sealing ridge (32) with a butylene rubber layer (33) placed around an outer surface of the rubber coupler body (3). On a rear end surface of the rubber coupler body (3), has an outer flange (31) which is brought into engagement with an outer periphery of the circular opening (12) upon inserting the rubber coupler body (3) to the circular opening (12) of the manhole pipe (1). A rubber coupler cylinder (5) is provided to have a diameter-increased cylinder portion (51), a diameter-reduced cylinder portion (52) and a transitionary portion (53) connecting the diameter-increased cylinder portion (51) to the diameter-reduced cylinder portion (52).

Abstract: An apparatus and method for repairing failed metal pipe inverts includes an apparatus for distributing concrete that is positioned at one entrance of the metal pipe invert. The apparatus includes a frame having a forward end and a rearward end. A trough is connected to the forward end, and a support arm is connected to said rearward end. One end of a chute traverses the trough, while the other is supported by the support arm. A scraper is to the chute to spread concrete distributed from the trough into the pipe invert. The concrete is poured into the chute and distributed into the trough. The apparatus is pulled through the metal pipe invert to distribute concrete from an opening in the trough onto the metal pipe invert. The scraper engages the concrete to selectively spread the concrete on the metal pipe invert and repair the invert.

Abstract: A liner for repairing a culvert includes a substantially semi-cylindrical body having an inside surface and an outside surface. The liner is configured for attachment to an inside surface of a culvert and has a shape corresponding to the inside surface of the culvert.

Abstract: A method for in-situ repair of old underground pipes is disclosed. A breaking tool with a drive or a pipe section is pulled from a typical inspection shaft to the next inspection shaft (machine shaft) by a hydraulic piston-cylinder unit which has a housing that is at least partially located inside the old pipe. The extremely limited interior space of the machine shaft is thereby kept essentially free from machine parts.

Abstract: Installation of a flexible cured in place liner by inverting the liner with air and curing the liner with steam introduced through a perforated lay flat hose without deflating the liner between the inversion and cure. The installation is performed with an apparatus having two independently operable glands with at least one fluid inlet port installed on the line downstream of the second gland liner. As the liner reaches the distal end of the conduit to be lined, it enters a sample and porting pipe with an exhaust pipe gland and exhaust pipe and it is pierced by a rigid porting tool. Steam is then introduced into the lay flat hose to cure the resin and is exhausted through an exhaust hose connected to a controllable exhaust pipe. After curing steam is replaced with air to cool the liner, the ends are cut to restore service through the host pipe.

Abstract: A method for repairing and strengthening pipes by creating a structural reinforced composite liner within the existing pipe. The liner is created by helically winding a tensile reinforcement material on the inside wall of a pipe and encapsulating it in a hardening matrix material. The reinforcement material is helically wound around the inside wall of the pipe by an installation device. The installation device is configured to relieve and/or prevent the development of torsional stress in the reinforcement material that is created by the act of helically winding it onto the inside wall of a pipe, allowing the reinforcement material to lay flat against the pipe wall without twisting or buckling. The structural reinforced composite can be configured to supplement the strength of the existing pipe or to function as a stand-alone pipe within the existing pipe.

Abstract: A method for repairing and strengthening pipes by creating a structural reinforced composite liner within the existing pipe. The liner is created by helically winding a tensile reinforcement material on the inside wall of a pipe and encapsulating it in a hardening matrix material. The reinforcement material is helically wound around the inside wall of the pipe by an installation device. The installation device is configured to relieve and/or prevent the development of torsional stress in the reinforcement material that is created by the act of helically winding it onto the inside wall of a pipe, allowing the reinforcement material to lay flat against the pipe wall without twisting or buckling. The structural reinforced composite can be configured to supplement the strength of the existing pipe or to function as a stand-alone pipe within the existing pipe.

Abstract: Systems, methods and devices for the remote control of a robot which incorporates interchangeable tool heads. Although applicable to many different industries, the core structure of the system includes a robot with a tool head interface for mechanically, electrically and operatively interconnecting a plurality of interchangeable tool heads to perform various work functions. The robot and tool head may include several levels of digital feedback (local, remote and wide area) depending on the application. The systems include a single umbilical cord to send power, air, and communications signals between the robot and a remote computer. Additionally, all communication (including video) is preferably sent in a digital format. Finally, a GUI running on the remote computer automatically queries and identifies all of the various devices on the network and automatically configures its user options to parallel the installed devices.

Abstract: Installation of a flexible cured in place liner by inverting the liner with air and curing the liner with steam introduced through a perforated lay flat hose without deflating the liner between the inversion and cure. The installation is performed with an apparatus having two independently operable glands with at least one fluid inlet port installed on the line downstream of the second gland liner. As the liner reaches the distal end of the conduit to be lined, it enters a sample and porting pipe with an exhaust pipe gland and exhaust pipe and it is pierced by a rigid porting tool. Steam is then introduced into the lay flat hose to cure the resin and is exhausted through an exhaust hose connected to a controllable exhaust pipe. After curing steam is replaced with air to cool the liner, the ends are cut to restore service through the host pipe.

Abstract: A method of repairing or reinforcing underground pipes includes the steps of providing a flexible liner assembly having a first end and a second end, applying an internal pressure to the flexible liner assembly, inserting the first end of the liner assembly into a first end of a pipe section while maintaining the internal pressure, pushing the flexible liner assembly through the pipe section while maintaining the internal pressure, releasing the internal pressure from the flexible liner assembly, and connecting the first and second ends of the flexible liner assembly to the pipe section so that the flexible liner assembly provides a substantially leak-free conduit through the pipe section. The method addresses drawbacks associated with prior art methods by preventing or reducing contact between the flexible liner assembly and sharp inner corners of the pipe section, thereby reducing drag between the flexible liner assembly and the interior of the pipe section.

Abstract: A lining material has a flexible tubular lining material impregnated with a thermosetting resin and having first and second sides. A first elastic and rigid strip member is removably attached to the first side of the flexible tubular lining material so as to extend along a substantially entire length of the flexible tubular lining material. A second elastic and rigid strip member is removably attached to the second side of the flexible tubular lining material so as to extend along the substantially entire length of the flexible tubular lining material. A third elastic and rigid strip member is attached to one end of the flexible tubular lining material and to the first and second elastic and rigid strip members.

Abstract: A liner tube is provided for repairing either a single pipe line or a main pipe line having a lateral pipe line connected thereto. The liner tube assembly includes a liner tube impregnated with a liquid material capable of curing and hardening. The liner tube includes a gasket or band positioned about the juncture of the pipe lines. The gasket or bands form a tight seal between the liner tube and the pipe line.

Abstract: To line an inner circumferential surface of side walls of a manhole, a rehabilitating sheet made of a sheet material resistant to water and corrosion is provided in the form of a bag having a shape corresponding to the inner circumferential surface to be lined. The rehabilitating sheet is inserted into the manhole to be lined. Block and plate frames are coupled inside the bag of the rehabilitating sheet to support it so as to have the shape corresponding to the inner circumferential surface to be lined. A gap between the rehabilitating sheet and the inner circumferential surface of the side walls of the manhole is filled with a filler, which is then hardened to line the side walls of the manhole. Pairs of plate frames having different diameters are coupled to each other to provide ring plates having different diameters.

Abstract: One invention relates to a liner (5) for repairing the connection between a main pipeline (100) and a lateral pipe (200). The liner (5) includes a main pipeline lining part (12) that in use forms a tubular portion for lining an inner circumferential portion of the main pipeline (100) and a lateral pipe lining part (14) that in use forms a tubular portion for lining an inner circumferential portion of the lateral pipe (200). Located between the lateral pipe lining part (12) and the main pipe lining part (14) there is a transition zone (16) that in use is arranged to line a junction zone (150) between the main pipeline (100) and the lateral pipe (200). The transition zone (16) of the liner (5) is formed integrally with the main pipeline lining part (12) and the lateral pipe lining part (14).

Abstract: The present invention is a new liner assembly for use in pipes constructed from a flexible liner formed from a resin absorbent material. A compressible material, such as stitch-bond or foam, is attached to one or more sides of the liner for forming a taper along the compressible material when the liner is cured in place in the pipe using a curable resin and an expandable bladder to shape the liner to match the inside shape of the pipe. A taper is formed along the compressible material from the inside of the liner down to the inside of the pipe in which the liner is placed. As a result, a taper prevents accumulation of solid materials at the location of the pipe repair and thus prevents future clogging of the pipe at the repair.

Abstract: A material composition and method for making flexible inversion liners having glass fibers added for strength is disclosed. The liner combines a first layer of polyester felt, an open-faced knit of fabric from ECR glass and PET strands, glass fibers, and a second layer of polyester felt. These components are needle-punched together into essentially a single composite mat, or substrate, using standard needle-punching machinery. The liner is then formed into a tube preferably through a butt joint and prayer stitch covered with a urethane tape. A coating or foil is placed on the outside (prior to inversion) of the liner that is then impregnated with a resin. The resin can have low levels of volatile organic compounds, and can be thermosetting or UV-curable. The liner is then installed in a pipe through an inversion technique using, e.g., either air or water, and cured with UV radiation, steam, or hot water.

Abstract: A sacrificial lining system for a conduit is disclosed and comprises a liner portion having a proximal end and a distal end, with the proximal end defining a proximal opening and the distal end defining a distal opening. The lining system further comprises a flange portion positioned at and being united to the proximal end of the liner portion. The flange portion surrounds the proximal opening. The distal end of the liner portion is free of any flange structure to permit the distal end to be freely insertable into and through the lumen of the conduit.

Abstract: A liner assembly for pipeline repair and methods of installing same. The liner assembly generally comprises an outer tubular liner, an inner malleable inflatable bladder positioned longitudinally within said liner, and a generally non-stretchable strap positioned longitudinally within the malleable inflatable bladder. The generally non-stretchable strap restricts longitudinal over-expansion during positioning and inflation of the liner assembly within a pipeline.

Abstract: Embodiments of methods for pipeline rehabilitation include deploying a tubular liner along an inside of a pipeline, deflating the tubular liner to form a trough, and injecting grout into the pipeline by injecting grout into the trough. Other embodiments include deploying a tubular liner along an inside of a pipeline, inserting a first swab into the front end of the pipeline, the first swab having a core hole, placing the tubular liner through the core hole, injecting grout into the pipeline between the tubular liner and the inside of the pipeline, and advancing a second swab through the tubular liner to distribute the grout between the tubular liner and the pipeline and to advance the first swab ahead of the second swab from the front end to the back end of the pipeline.

Abstract: The present invention relates to sealing means made of a plastically deformable material for mechanical sealing of hollow hoses (2) of elastic material by means of an appliance having at least two jaws, at least one of which is movable towards and away from the other and which, when moving towards each other, crimp the sealing means against the hose (2) for contamination-tight sealing of the same, the sealing means (20) comprises at least one sealing member (4, 4?; 44, 44?; 64, 64?; 74, 74?; 84), which has two opposite ends and an opening (40, 40?) that extends between said ends to allow the at least one sealing member to be slipped onto the hose (2) to be sealed. The present invention also relates to a kit comprising a sealing means and an appliance for sealing of hollow hoses and to a method for mechanical sealing of hollow hoses.