Abstract: The invention describes a flexible tubular article for transport of volatile hydrocarbons comprising: (a) an inner layer of a polyvinylidene difluoride (PVDF) polymer or a polyvinylidene difluoride copolymer; (b) an intermediate thermoplastic polyurethane (TPU) layer extruded in tubular form over the inner PVDF layer, and (c) a polyvinyl chloride polymer extruded in tubular form over the outside surface of the intermediate layer and being coextensive therewith. The tubular articles of the invention have a maximum permeation rating of 15 g/m2/day under SAE J1737 test conditions.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: A metal tube having an inner wall coated with a metal foam liner. The metal tube has an outer diameter of between 2 mm and 75 mm, a length of between 10 mm and 1000 mm, and a wall thickness of between 0.2 mm and 2 mm. The metal foam liner has a thickness of between 0.1 mm and 10 mm, a permeability of between 10?13 m2 and 10?8 m2, a capillarity radius of between 5 ?m and 1 mm and a thermo-conductivity of between 1 W/m·K and 50 W/m·K. Also, a method to obtain a metal tube which inner wall is metallurgically bonded in thermo-conduction with a metal foam liner, a method to obtain a metal tube with a heterogeneous metal foam liner, and a method to obtain a tubular metal foam liner 10a from a sheet of metal foam.

Abstract: A hydrocarbon application hose to avoid substantial compression and blow-out resulting from high pressurization differentials therethrough. The hose is formed from an inner tube that has a layer of material with electromagnetic target, such as carbon fiber, disbursed therethrough. In this manner, the material, generally a polymer, may be electromagnetically heated once the layer has been wrapped with a metallic reinforcing member. Thus, the layer of material may transform into surrounding relation relative to the reinforcing member. A substantially unitary inner tube may thereby be provided that includes a reinforcing member for blowout resistance and is of unitary character for compression resistance.

Abstract: A flexible hose for transporting food liquids, particularly for irrigation or the like, comprising at least one outer protective layer (2) of a first flexible polymer material and at least one inner layer (3) in direct contact with the fluid to be transported, made of a second flexible polyvinyl chloride (PVC)-containing polymer material. The second polymer material includes a plasticizer agent having as low a migration level as to maintain the flexibility of said second polymer material substantially unaltered with time. The plasticizer agent is selected from the group comprising non-phthalate additives, so that it can be non-toxic and non-polluting for the food products to be transported.

Abstract: A thermal insulating tape is configured for fire protection for use in aircraft construction. The insulating tape has a multilayer construction including a flexible carrier tape providing protection against burn-through, the carrier tape being formed as a thermally conductive metal tape. An adhesive film is disposed on a first side of the carrier tape and is configured for partial fixation or complete wrapping of the insulating tape on a protected component. A flexible intumescent coating is disposed on a second side of the carrier tape.

Abstract: The present invention relates to a preformed liner of tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer adhered to the surface of a pipe, and in particular, an oil well pipe, without the need for either a primer layer or an adhesive. The liner comprises an effective amount of metal powder which provides adhesion between the liner and the surface of the pipe. The present invention also relates to a process for making such pipe, where in a preferred embodiment, the liner is co-extruded to form an inner layer and an outer layer. This co-extrusion embodiment is particularly useful in applications where high purity is necessary. In this case, the inner layer comprises an effective amount of metal powder and the outer layer is pure tetrafluoroethylene/perfluoro(alkyl vinyl ether) copolymer.

Abstract: A composite pipe having at least one metal end piece (2, 3) with a free end and a non-metal tubular component (10). The tubular component (10) is coupled to the at least one end piece (2, 3) opposite of the free end of the end piece (2, 3), by means of at least one peripherally extending, axially acting groove (6, 7) that the non-metallic tubular component (10) engages. The non-metallic tubular component (10) generally comprises axial fibers (11) extending down into the at least one groove (6, 7). The groove (6, 7) has a bottom (13) and a flank (14), which flank is located furthest away from the free end of the end piece (2, 3). Between the flank (14) and the axial fibers (11) there is provided an intermediate layer (15). Also described is a method of manufacturing such a composite pipe.

Abstract: Disclosed is a reinforced thermoplastic pipe, comprising a thermoplastic polymer inner tube, a thermoplastic polymer outer tube and a reinforcing fabric between the thermoplastic polymer inner tube and the thermoplastic polymer outer tube. The reinforcing fabric comprises thermosettable thermoplastic polymer weft yarns and unidirectionally woven warp yarns. The warp yarns are twisted into twisted cords. Disclosed is also a process of making the reinforced thermoplastic pipe.

Abstract: A fuel pipe that is made from nano or sub-nano plastic or rubber materials and can be used for motor vehicles and ships includes a nano or sub-nano Far Infrared Ray (FIR) and anion carrier. The structures of the carrier are made up of nano or sub-nano tourmaline granules integrated into the carrier body made from general, nano, or sub-nano plastic, rubber, resin, or metal materials. The carrier can be the whole body, interior or exterior wall, or paste structures set on the inner or outer wall surface of the pipe. The carrier can reach a far infrared emission rate up to 96% from ˜85% by general tourmaline materials and facilitate sufficient combustion by breaking fuel molecular group into pieces. As a result, the novel pipe can achieve an extra 12-percent fuel economy improvement. The percentage of toxic gas in the exhaust will be correspondingly reduced.

Abstract: A fuel pipe that is made from general, nano or sub-nano metal materials and can be used for motor vehicles and ships includes a nano or sub-nano Far Infrared Ray (FIR) and anion carrier. The structures of the carrier are made up of nano or sub-nano tourmaline granules integrated into the carrier body made from general, nano, or sub-nano plastic, rubber, resin, or metal materials. The carrier can be the whole body, interior or exterior wall, or paste structures set on the inner or outer wall surface of the pipe. The carrier can reach a far infrared emission rate up to 96% from ˜85% by general tourmaline materials and facilitate sufficient combustion by breaking fuel molecular group into pieces. As a result, the novel pipe can achieve an extra 12-percent fuel economy improvement. The percentage of toxic gas in the exhaust will be correspondingly reduced.

Abstract: The multi-layer tape wrapped tubing for effectively impeding the diffusion of vapor is made in a continuous in-line process and has three distinct layers: an inner tubing layer, a middle diffusion barrier layer and an outer jacketing layer. The inner tubing layer comes into contact with liquid and vapor. Vapor that might ordinarily diffuse through the tubing is impeded by the diffusion barrier layer. The diffusion barrier layer is a laminate comprising a diffusion barrier film with a very low vapor diffusion rate sandwiched between layers of thermoplastic. The diffusion barrier layer is wrapped around the inner tubing one or more times. The outer jacket layer is a polymeric jacket which is extruded onto the diffusion barrier layer wrapped inner tubing.

Abstract: A pipe having a wall formed from a cross-laminated film, and a method of making such a pipe. The film is formed of first and second layers having respective first and second orientation directions, wherein an angle between each of the first and second orientation directions and a projection of a longitudinal axis of the pipe on the wall is selected to enhance the resistance of the pipe to circumferential and/or longitudinal strain due to internal fluid pressure. The angle between each of the first and second orientation directions and a projection of the axis on the wall may be substantially equal to the neutral bias angle. In some cases, the angle between each of the first and second orientation directions and the projection of the axis on the wall may be substantially equal to 59°±2°.

Abstract: A device for thermally insulating at least one undersea pipe. The device comprises a thermally insulating covering surrounding the pipe, the covering being covered by an outer leak proof protective case, and the case being made of a flexible or semi rigid material suitable for remaining in contact with the outside surface of the insulating covering when it deforms. The device is characterized in that the insulating covering comprises a phase-change material confined in at least one container made of a flexible or semi rigid material that is deformable, and the container is disposed around the pipe.

Abstract: The present invention relates generally to the field of structural pipe lining for conduit rehabilitation and more specifically, to methods for rehabilitating conduits using structural liners. There is provided a method for rehabilitating a tubular conduit having an inner conduit space and at least one service connection tied into the tubular conduit. A portion of the at least one service connection protrudes into the inner conduit space. A liner is provided for covering the inner surface of the tubular conduit. The liner is made of a flexible material capable of being impregnated with a first curable adhesive resin and has a film made of a material impermeable to liquid bonded onto the inner surface of the liner. Also provided, is a flexible sealing member made of a second curable adhesive resin.

Abstract: Syntactic polyurethanes are obtainable by reacting a polyisocyanate component a) with a polyol component, the polyol component b) comprising a polyetherpolyol based on a difunctional initiator molecule b1), a polyetherpolyol based on a trifunctional initiator molecule b2) and a chain extender b3), in the presence of hollow microspheres c). Furthermore, the syntactic polyurethanes are used for insulating offshore pipes and other parts and equipment used in the offshore sector, and the insulated offshore pipes as such are described.

Abstract: A tubular fluid flow device of varying outside dimensions adapted for use in a high pressure, rapidly cycling temperature environment, an isolation ball valve, a ball valve isolation method and a catalyst transfer method. The flow device 10 can have a tubular member 12 having at least one locus 14, 16 of non-uniform outside dimension and an axial flow passage 20 with a uniform inside diameter between opposite end connection elements. A thermal sleeve liner 22 can be disposed about the axial flow passage in a bore 24 formed in the tubular member, wherein the sleeve comprises an outer surface having a thermal barrier coating 26. A pressure-relief passage 28 is provided in fluid communication between the axial flow passage and an interface between an exterior surface of the thermal sleeve liner and an inner surface of the bore.

Abstract: The present invention relates to an oil pipe having a lining imparting substantially reduced adhesion of asphaltenes, paraffin wax, and inorganic scale, so as to reduce plugging of said oil pipe, and impermeability to salt water so as to protect the oil pipe from corrosion.

Abstract: The invention describes a flexible tubular article for transport of volatile hydrocarbons comprising: (a) an inner layer of a thermoplastic polyurethane (TPU); (b) an intermediate polyvinylidene difluoride (PVDF) polymer or PVDF copolymer layer extruded in tubular form over the inner TPU layer, and (c) a TPU extruded in tubular form over the outside surface of the intermediate layer and being coextensive therewith. Optionally, a fourth outer layer is included and covers layer (c). The tubular articles of the invention have a maximum permeation rating of 15 g/m2/day under SAE J1737 test conditions.

Abstract: A motor vehicle hose consisting of plastic material, where the interior surface of the hose consists at least in segments of an electrically conducting plastic material. The invention provides for a section of electrically conducting plastic material that extends at least over a portion of the circumference of the hose and which is connected to the electrically conducting interior surface of the hose. The section extends in a radial direction into a layer of non-conducting plastic material. The section extends at least in segments in the longitudinal direction of the hose.

Abstract: The present invention relates to a multilayer tube comprising, in its radial direction from the outside inwards: an optional layer (1) made of nylon-11 or nylon-12 polyamide; an intermediate layer (2) comprising by weight, the total being 100%: 50 to 100% of at least one polyamide A1 of formula X, Y/Z or 6, Y2/Z, in which X denotes residues of an aliphatic diamine having from 6 to 10 carbon atoms, Y denotes residues of an aliphatic dicarboxylic acid having from 10 to 14 carbon atoms, Y2 denotes residues of an aliphatic dicarboxylic acid having from 15 to 20 carbon atoms, Z denotes at least one unit chosen from residues of a lactam, residues of an ?,?-aminocarboxylic acid, the unit X1, Y1, in which X1 denotes residues of a diamine and Y1 denotes residues of a diacid, the weight ratios Z/(X+Y+Z) and Z/(6+Y2+Z) being between 0 and 15%, and 0 to 50% of nylon-11 or nylon-12 polyamide; an optional layer (3) made of nylon-11 or nylon-12 polyamide, with the condition that at least one of the layers (1) and (3)

Abstract: A low permeability hose system for providing an impermeable length of tube to transfer fluids that is flexible. The low permeability hose system generally includes a hose defining a fluid passage and an impermeable layer attached to the exterior surface of the hose. The impermeable layer is comprised of an aluminum coated heat sealable film that is impermeable to both liquids and gases. A protective layer may be attached to the impermeable layer to protect the impermeable layer from damage.

Abstract: A refrigerant transportation hose having excellent flexibility and high resistance to permeation of refrigerant. The refrigerant transportation hose includes an innermost layer formed by using polyamide resin, a low-permeation layer formed on an outer peripheral surface of the innermost layer and rubber layers (of an inner rubber layer and an outer rubber layer) formed on an outer peripheral surface of the low-permeation layer, wherein the low-permeation layer is a resin film in thickness of 5 to 100 ?m made of polyvinyl alcohol having a degree of saponification of not less than 90%.

Abstract: A tube (1) of fabric reinforced PVC for suspension from a ceiling of a tunnel or the like comprises a tube shaped fabric with an internal and an external coating of PVC. The internal coating is of black, electrically conducting PVC and the external coating is of white, electrically isolating PVC. The tube (1) is provided with an external, longitudinal strip (2) of black, electrically conducting PVC in contact with the internal coating. The strip (2) is earthed by a suspension arrangement (3-5) for the tube (1) to the ceiling.

Abstract: A manufacturing process for flexible tube skirts including the steps of providing a multi-layer plastic film, cutting out a strip from the multi-layer plastic film, producing a cylindrical sleeve by rolling-welding the strip, and cutting out the sleeve to the desired length to obtain the tube skirts. The strip is cut out from a multi-layer plastic film which has a symmetrical structure in relation to its median plane, with symmetrical layers having the same thickness and made of the same plastic, having the same chemical composition and the same molar mass.

Abstract: The present invention relates to in-line coating of a continuously moving substrate, such as a tube or conduit, preferably of the type used for applications such as fire sprinkler piping. The present invention includes a fire sprinkler pipe defining an interior wall surface surrounding an internal pathway. The interior surface is coated with a coating that reduces the degradation of the interior surface and provides a barrier between the interior surface and fluid within the pathway to resist degradation of the interior surface over the life of the tube or conduit.

Abstract: A resin composite hose includes a curved portion at an axial position thereof, and has a multilayer construction including a resin layer having permeation resistance to a transported fluid and serving as a barrier layer, an inner rubber layer and an outer rubber layer. The curved portion has a shape of progressively increasing a circumferential length while being flattened progressively increasingly from a curve beginning end of a perfect circle in cross-section to a curve terminal end or a curve middle portion of a flattened circle.

Abstract: The present invention includes a disposable flow path for an infusion system for communicating between a fluid source and a patient. The flow path comprises a flow restrictor having first and second ends and defining a flow path between the ends. The flow restrictor comprises a plurality of materials, including a first material defining the flow path, which first material is substantially resistant to vapor transmission, and a second material different than the first material defining at least a portion of an outer surface of the flow restrictor. The second material is suitable for joining to other portions of the flow path.

Abstract: A method for making conduits includes inserting an inner tube into an outer tube and melting a portion of the inner tube to form a bond with the outer tube. The inner tube includes a polymeric material and the outer tube includes a material having a greater yield strength than the polymeric material. A conduit includes one or more inner tubes at least one of which is melt-bonded to one or more outer tubes. An analytical instrument includes a separation column, a solvent reservoir and pump, a sample injector, a detector to observe an eluent of the separation column, and tubing to transport fluid between components of the instrument.

Abstract: A conduit pipe for conveying media, having a core pipe made of a copper alloy and a jacketing made of a plastic material from the group of the polyolefins having functional groups. The ratio between the thickness of the jacketing wall and the thickness of the core pipe wall ranges between 2:1 and 14:1, while the ratio between the thickness (D) of the core pipe wall and its inside diameter (ID) ranges between 0.01 and 0.05.

Abstract: The present invention relates to a multilayer pipe or hose, in particular a plastic pipe, comprising at least one polyester barrier layer and at least one additional protective layer, the additional protective layer being a polyethylene layer, in particular a HDPE layer, and the barrier layer and the protective layer being are interconnected via at least one adhesion promoter layer.

Abstract: The present invention provides an insulated pipe comprising a pipe and a composite insulation system, said composite insulation system comprising: (a) a first insulation layer comprising a first insulation material having a thermal conductivity k-factor value of less than 0.023 W/m-K at 38° C.; and (b) at least one additional insulation layer comprising an insulation material having a thermal conductivity k-factor greater than that of the first insulation material and a maximum operating temperature limit less than that of the first insulation layer. The composite insulation system is bonded to an exterior surface of the pipe with the first insulation layer facing towards said exterior surface of the pipe. At least one of said first insulation layer or said at least one additional layer extends continuously about the exterior surface of the pipe. The present invention further provides an insulated pipe for use in an undersea pipeline and an insulated pipe for use in a subterranean pipeline.

Abstract: The invention relates to a high-pressure pipe element having at least two metal tubes 1, 3 reinforced by hoops 2 and 4, the ends of the tubes being bare. The tubes are assembled end to end by a weld 5 of the bared ends. A sleeve 6 covers the weld 5 as some of the hooping 2 and 4 of each tube, forming an annular space between the bare ends of the tubes and the sleeve, said space being filled with a setting material 9.

Abstract: An insulated article having a first insulation region comprising a first polymeric material and first hollow ceramic microspheres and a second insulation region comprising a second polymeric material and second hollow ceramic microspheres. The first insulation region has a thermal conductivity that is no greater than the thermal conductivity of the first polymeric material and a volumetric heat capacity in a range of 60% to 90% of the volumetric heat capacity of the first polymeric material. The second insulation region has a thermal conductivity that is no greater than 90% of the thermal conductivity of the second polymeric material and a volumetric heat capacity that is less than 60% of the volumetric heat capacity of the second polymeric material. A method for making a composition for insulating an article is also described.

Abstract: The present invention relates to polyamide/polyolefin blends containing carbon nanotubes. The invention also relates to structures comprising at least one layer of these blends and optionally at least one layer of another material. These structures may be in the form of bottles, tanks, containers, hoses, pipes and vessels of any kind. These structures may be manufactured using the standard techniques for thermoplastics, such as injection moulding, extrusion-blow moulding and coextrusion.

Abstract: There is provided a method for preparing a plumbing manifold for use in a water system in which the manifold after molding is subjected to cross-linking high energy radiation. The manifold is made by polyethylene or a metallocene polyethylene.

Abstract: A flexible tube includes a first layer comprising a polyolefin material having a flexural modulus of not greater than 150 MPa and includes a second layer directly bonded to and in direct contact with the first layer. The second layer comprising a blend of propylenic polymer and styrenic block copolymer.

Abstract: The invention relates to a multilayered plastic tube for use in automotive airbrake systems comprising an outer layer and an inner layer, and optionally at least one intermediate layer positioned between the inner and outer layer, wherein at least one layer of the inner layer and the optional intermediate layer or layers consists of a thermoplastic polymer composition having a flexural modulus in the range of 1000-2300 MPa and comprising a semicrystalline polyamide and/or polyester polymer having a melting temperature of at least 1800C, and wherein the outer layer and any other remaining layer consist of a copolyester elastomer composition and/or copolyamide elastomer composition.

Abstract: The present disclosure is directed to embodiments of composite tubing having properties tailored to meet a wide variety of environmental and working conditions. Composite tubes disclosed herein may include one or more of the following layers: a internal liner, a composite layer, a thermal insulation layer, a crush resistant layer, a permeation barrier, buoyancy control layer, a pressure barrier layer, and a wear resistant layer. Grooves may be provided in one or more layers of the composite tube to provide increased axial permeability to the composite tube. A venting system, including vent paths, may be provided in the composite tube to vent fluid that may become trapped within the wall of the composite tube.

Abstract: An intermediate insulating product (20) is disclosed comprising a planar insulating layer (11) having a top side in to which is formed a plurality of parallel channels (14) having cross-sections with tapered sides. A vapour proof layer (18) is applied to the top surface after the channels (14) have been formed such that the vapour proof layer (18) bridges the plurality of parallel channels (14). The intermediate insulating product (20) is then bent with mechanical manipulation in regions adjacent the bottom of the channels (14) thereby causing the channels (14) to close to form a non-planar, derivative insulated ductwork product (30) and the vapour proof layer (18) forms a vapour proof inner lining to the derivative insulated ductwork product (30).

Abstract: The present invention relates to a composite pipe (1) designed to transport, indiscriminately, a hydrocarbon fuel or a hydraulic fluid, characterized in that it comprises a hollow central sheath (10) made of a thermoformed thermoplastic and an external sheath (20) consisting of several radially superposed layers (22, 24) comprising at least one layer of resin (24) placed in direct contact with the central sheath (10) and one layer of fibers (22) covering the layer of resin (24).

Abstract: A multi-layer structure for sensing impacts in real-time having an inner layer of polyvinylidene fluoride having piezoelectric properties disposed between and joined with two outer layers of an electrical signal conductor.

Abstract: A method is provided involving manufacturing a solid monolithic hollow ceramic liner, such as a cylinder, reducing cone and bend and then wrapping the solid monolithic hollow ceramic liner with a fiber glass resin. This forms an external housing for the mold and flange connections can be fixed on either end to facilitate its connection to valves, pumps and other piping systems.

Abstract: A rigid ductwork component for a residential, commercial, or industrial air handling system that is comprised of a rigid, tubular, fire retardant layer including a foamed or non-foamed polymer resin and a fire retardant compound. In some embodiments, the ductwork component satisfies the requirements of UL E-84 rating, and the fire retardant compound includes nanoparticles.

Abstract: The invention relates to a hose made of a thermoplastic polymer comprising a core and a cover provided with a reinforcement, in particular in the form of a multilayer reinforcing structure, wherein each core and cover consists of a thermoplastic polymer and wherein, according to the invention, an intermediate coupling layer is incorporated into the core and/or cover material by welding and is connected in the form of a reinforcement. The appropriated variants of the embodiment of the intermediate coupling layer are also enclosed.

Abstract: Abrasion resistant polymer pipe and a process for the production thereof. The pipe comprises a first, abrasion resistant inner layer (1) and a second, structural layer (2), which is placed on the outer side of the inner layer. The first and the second layers comprise extrudable polymer materials and they are preferably separated by an alarm layer which indicates wear or depletion of the inner layer. The pipe is suitable for use in the mining industry and generally for conducting liquid and gaseous fluids containing abrasive particles.

Abstract: The present invention relates to a symmetrical multi-layer tube based on polyamide and ethyl vinyl alcohol (EVOH) or polyvinyl alcohol (PVOH) for transferring fluids. As examples of tubes for transferring fluids, mention may be made of fuel (gasoline, diesel fuel) pipes, in particular for carrying fuel from the tank to the engine of motor vehicles. Other examples of fluid transfer include, but are not limited to, the fluids used in fuel cells, CO2 systems for cooling, hydraulic systems, cooling circuits and air-conditioning circuits, and medium-pressure power transfer.

Abstract: The present invention relates to a vessel, in particular a pipe, especially an oil pipe, having a preformed film adhered onto the interior surface of the pipe, the interior surface of the preformed film reducing the deposition of at least one of asphaltenes, paraffin wax, and inorganic scale by at least 40% as compared to the interior surface of said oil pipe without said preformed film being present. In a preferred embodiment, the preformed film is adhered to the interior surface of the pipe with a primer layer with an optional barrier layer between the primer layer and the preformed film.

Abstract: Tubular objects having two or more concentric layers that have different properties are joined to one another during their manufacture primarily by compressive and friction forces generated by shrinkage during sintering and possibly mechanical interlocking. It is not necessary for the concentric tubes to display adhesive-, chemical- or sinter-bonding to each other in order to achieve a strong bond. This facilitates joining of dissimilar materials, such as ceramics and metals.

Abstract: A duct section and system, including a laminated shroud, acting as a secondary duct, for aerospace and other applications, and a method for constructing same. The duct structure incorporates a metallic primary duct tube, with a laminated shroud surrounding the primary duct tube and separated therefrom by an annular gap. The laminated shroud includes a metallic inner layer and a polymeric outer layer. Preferably, the thin metallic layer is a corrosion resistant material such as corrosion resistant stainless steel or titanium. In one embodiment of the invention, the outer polymeric layer is a polyimide material, such as polyimide resin-impregnated fiberglass cloth.