Abstract: A pipeline structure with a lining material wherein a hermetic outer tube is disposed at the inner surface of a pipeline, and an inner lining material is disposed at the inner surface of the outer tube, said inner lining being made of a rigid fiber-reinforced plastic wherein a thermosetting resin is reinforced by a fiber reinforcement material.

Abstract: A composite material having improved thermal and mechanical properties is provided by a thermoplastic multilayer composite consisting at least of(I) a layer of a polyvinylidene fluoride moulding composition,(II) a layer directly adjacent to the layer I, comprising a moulding composition based on a mixture of(a) from 40 to 90% by weight of a polyamide, and(b) from 10 to 60% by weight of a polyglutarimide,(III) a layer directly adjacent to the layer II comprising a suitable coupling agent, and(IV) a layer directly adjacent to the layer III, comprising a polyolefin moulding composition, with adjacent layers being firmly bonded to one another. By means of the invention it is possible to obtain composite materials having the desired improved property profile.

Abstract: A multi-layer article comprises a substantially non-fluorinated layer, and a fluorinated layer of fluoropolymer comprising interpolymerized monomeric units derived from one or more of hexafluoropropylene and tetrafluoroethylene monomers, one or more non-fluorinated olefinically unsaturated monomer, and substantially no vinylidene fluoride monomer. The multi-layer article further comprises an aliphatic di-, or polyamine which provides increased adhesion between the layers as compared to a multi-layer article not containing the aliphatic di-, or polyamine. The multi-layer article can be prepared by mixing the aliphatic di-, or polyamine into the substantially non-fluorinated polymeric material, or by applying the aliphatic di-, or polyamine to a surface of one or more of the substantially non-fluorinated polymeric material or the fluoropolymer, and thereafter preparing a multi-layer article.

Abstract: A flexible conduit for coolant having a high bursting pressure above 8 bar at 100.degree. C. and high hydrolysis resistance comprising an outer layer of a material selected from the group consisting of homopolyamides, copolyamides and mixtures thereof with an excess of amino terminal groups, a non-swelling inner layer made of a material selected from the group consisting of non-halogenated copolyolefins, non-halogenated homopolyolefins and mixtures thereof and a middle layer compatible with the inner and outer layers made of a homopolyolefin or a copolyolefin with grafted functional groups, the layers being coextruded and corrugated during coextrusion.

Abstract: The disclosure relates to a composite tubing comprising a convoluted tubular core having coextruded inner and outer plastics layers providing a composite tube having a smooth inner bore and a smooth outer surface.

Abstract: This composite pipe (20) is of the type including an inner tube (2) made of a first thermoplastic material (A), a reinforcement (21) including a metal tape (3) bonded to the inner tube by a first adhesive (61) compatible with the first thermoplastic material, an outer sheath (4) made of a second thermoplastic material (B), bonded to the reinforcement (21) by a second adhesive (62) compatible with the second thermoplastic material. According to the invention the two materials A and B have different chemical natures and, in the connecting region 22 between the strips opposite one another 61a, 62a, respectively, of the first and of the second adhesive, a means of bonding joins these two bands coherently. In an embodiment this means of bonding consists of adhesives which are different but compatible and co-crosslinked with each other.

Abstract: Conduit liners and methods for their construction and use are provided. The liners include a first flexible layer mechanically bonded to at least one glass-containing layer and folded to form a tubular laminate. The laminate can be penetrable by resinous liquid capable of setting the form of substantially continuous matrix within the laminate following the expansion of the laminate within a conduit. In preferred versions of the liner, multiple glass layers are provided on the inner and outer diameter of the construction with a polyester core so as to meet minimum thickness requirements for vibration resistance under American in situ pipe vibration resistance codes.

Abstract: A multi-layer composition comprising of a fluoropolymer layer, a hydrocarbon polymer layer, and an aliphatic di- or polyamine having a molecular weight of less than 1,000, wherein the fluoropolymer comprises vinylidene fluoride units; the hydrocarbon polymer is a polyamide, polyimide, or a functionalized polyolefin; and wherein substantially all of the di- or polyamine is located between the fluoropolymer and the hydrocarbon polymer layers, the amount of amine being sufficient to increase the adhesion of the two layers.

Abstract: A multi-layered hose according to the present invention comprises a rubber outer layer and a resin or metal inner layer which is integrally formed at the inner periphery surface of the rubber outer layer. The thickness of the resin inner layer formed at the inner periphery surface of the edge portion is thinner than that of the resin inner layer formed at the inner periphery surface of a main portion of the hose. Therefore, when a mating pipe is inserted into the hose edge portion, the mating pipe is satisfactorily adhered to the inner surface of the hose edge portion, thereby obtaining excellent sealing.

Abstract: An end of a composite cylinder is formed about an end connection assembly having two longitudinally arranged pieces having a contour which prevents the withdrawal of the end connection assembly from the cylinder. The two pieces of the end connection assembly are relatively forced apart and a snap ring having a certain rest diameter is reduced in diameter and inserted into the end connection assembly to a position between the pieces. The snap ring then assumes its rest diameter positioned between the pieces, forcing them to maintain intimate contact with the inner surface of the cylinder, thus removing any residual gap from the assembly process and/or preloading the interface between the end of the composite cylinder and the end assembly prior to application of an axial load.

Abstract: A double wall thermoplastic pipe has a flat inner wall, a corrugated outer wall and a skin of reduced thickness relative to and between the walls. The skin is secured continuously along one of the walls and is secured to the other of the walls at spaced apart locations along the pipe where the pipe walls are adhered to one another by the skin.

Abstract: A fuel additive pipe 11 comprised of a pipe main body 12 and a plating layer 13 formed on the external or interior wall surface of the pipe main body 12 and composed of an electroless plating layer 131 and an electroplating layer 132. The pipe main body 12 contains a high-density polyethylene as a base material and an additive 21 such as mica. While the pipe main body 12 is subjected to an etching treatment, the additive 21 does not dissolve in the etching solution, so that the additive 21 protrudes from the surface of the pipe main body 12. The thus protruding additive 21 serves as the starting point for forming the electroless plating layer 131 and promotes growth of the layer 131. This electroless plating layer 131 is firmly bonded with the pipe main body 12 by chemical absorption to the additive 21 from which inactive sites are removed by the etching treatment as well as by the physical absorption to the fine roughness formed by the etching treatment on the surface of the pipe main body 12.

Abstract: Multilayer tube or sheet including an intermediate layer, an inner layer bonded to the inner surface of the intermediate layer and an outer layer bonded to the outer surface of the intermediate layer, in which the intermediate layer comprises a polymeric material chosen from terpolymers of ethylene, of maleic anhydride and of an acrylate.

Abstract: Fire resistant pipes and pipe fittings include a structural pipe wall formed from helically wound reinforcing fiber that is bonded together with a thermoset polymer resin selected from the group consisting of phenolic resins, siloxane-modified phenolic resins, furan resins, and mixtures thereof. In a first embodiment, a resin rich fire resistant layer is applied to the surface of the structural pipe wall. The carrier is capable of accommodating a large amount of resin. The resin used to impregnate the carrier is selected from the same group of resins used to form the structural pipe wall. It is desired that both resins be compatible, and preferably be the same, to facilitate forming a bond between the structural pipe wall and the fire resistant layer during cure.

Abstract: The invention relates to a pipe for conveying fuel, in particular for motor vehicles, the pipe comprising a polyamide inner layer, an outer layer of vulcanized elastomer such as CSM, and a film of modified polyolefin forming an alcohol barrier and connecting the inner layer to the outer layer.

Abstract: Composite material 19 comprising outer member 17 having ring form section and inner member 18 mounted into said outer member so as to form a unitary construction, wherein inner surface 24 of said outer member 17 and outer surface 22 of said inner member 18 are at least partially opposed to each other through a gap .delta. and wherein said members 17,18 are joined together by means of anaerobic adhesives filling said gap .delta..

Abstract: An oil hose comprised of (i) an inner layer made of a vulcanized hydrogenated nitrile rubber composition, an intermediate layer made of a vulcanized unsaturated nitrile-conjugated diene copolymer rubber composition, and an outer layer made of a vulcanized ozone-resistant rubber composition, or (ii) an inner layer made of a vulcanized rubber composition comprising a hydrogenated copolymer rubber composed of an unsaturated nitrile, a conjugated diene and a copolymerizable ethylenically unsaturated monomer, and an outer layer made of a vulcanized ozone-resistant rubber composition. This hose has good oil resistance, thermal resistance and copper ion resistance, and caulking in the portion thereof connected to a copper pipe is strong and oil leakage at a low temperature is prevented.

Abstract: Polymer tubing, made of at least one polymer layer, has a partial section of the tubing which is corrugated and wherein the rings formed by the corrugations extend around the tube axis, with the corrugations being embodied at least partially in an oval shape or in the shape of an ellipse or in the form of a circle, which is flattened on one side.

Abstract: A fuel hose comprising an outer rubber layer wherein polysulfide is crosslinked so that polysulfide bonding density is not less than 4.times.10.sup.-5 mol/cm.sup.3 and acrylonitrile-butadiene rubber having a carboxyl group is contained, and an inner polyamide resin layer which is laminated on the inside face of the outer rubber layer and bonded thereon by heat treatment. Since the polyamide resin powder is melted by the heat treatment and the polysulfide bonding decomposes so that the resultant residue after decomposition combines with polyamide molecules, resulting in a direct and strong bonding of the outer rubber layer and the inner polyamide resin layer. Moreover, since the special acrylonitrile-butadiene rubber is mixed therein, it is possible to set up the heat treatment condition at a rather mild one.

Abstract: A fuel hose comprising an outer rubber layer wherein polysulfide is crosslinked so that polysulfide bonding density is not less than 4.times.10.sup.-5 mol/cm.sup.3 and phenol based resin is contained, and an inner polyamide resin layer which is laminated on the inside face of the outer rubber layer and bonded thereon by heat treatment. Since the polyamide resin powder is melted by the heat treatment and the polysulfide bonding decomposes so that the resultant residue after decomposition combines with polyamide molecules, resulting in a direct and strong bonding of the outer rubber layer and the inner polyamide resin layer. Moreover, since the phenol based resin is mixed therein, it is possible to set up the heat treatment condition at a rather mild one.

Abstract: An end of a composite cylinder is formed about a multipiece end assembly having a contour which prevents the withdrawal of the end assembly from the cylinder. The pieces of the end assembly are relatively forced apart and a spacer is positioned between the parts to maintain the pieces in intimate contact with the inner surface of the cylinder thus preloading the end prior to application of an axial load or removing any residual gap from the manufacturing process. The cylinder may have end assemblies at both ends and to which may be coupled external connectors such as flange members, for construction of a marine riser.

Abstract: A fuel hose comprising an outer rubber layer wherein polysulfide is crosslinked so that polysulfide bonding density is not less than 4.times.10.sup.-5 mol/cm.sup.3, and an inner polyamide resin layer which is laminated on the inside face of the outer rubber layer and bonded thereon by heat treatment. Since the polyamide resin powder is melted by the heat treatment and the polysulfide bonding decomposes so that the resultant residue after decomposition combines with polyamide molecules, resulting in a direct and strong bonding of the outer rubber layer and the inner polyamide resin layer.

Abstract: Multilayer fluid conduits are formed by adhering to a tubular outer surface of a metal pipe, a thermoplastic outer layer. The outer layer permits ends of the multilayer conduit to be joined together in leak-proof fluid conduit systems simply by adhering the conduit ends with compatible thermoplastic fittings. For fire protection systems, the preferred metal is steel, the preferred thermoplastic is CPVC and the preferred adhesive is heat activated. The adhesive coated metal pipe is preheated and the CPVC is extruded onto the outer surface of the heated metal pipe. Through the use of fire resistive CPVC, the multilayer conduit systems of the present invention can be installed in more severe fire threat areas than can existing, all plastic piping, including all CPVC piping systems. The conduit is assembled into systems on site simply by cutting and direct bonding with ordinary, all plastic fittings using appropriate bonding agents such as solvent based adhesives.

Abstract: Methods for producing improved pipe structures for natural gas distribution pipelines produce a thin fibrous jacket or layer which can inhibit and prevent cracks in natural gas distribution piping by preventing surface scratches as well as by enhancing the pipe strength. Thermoplastic fibers are preferred in accordance with methods and structures of the present invention to facilitate the use of joining techniques and hot-tapping techniques common in the natural gas distribution industry. Non-woven, heat shrinkable fibers are also employed in sleeve structures to produce a protective fibrous jacket or layer.

Abstract: A layered tubing for use in a motor vehicle composed of a thick outer layer having an inner and an outer face, the outer layer made of an extrudable thermoplastic elastomer; a thin intermediate bonding layer bonded to the inner face of the thick outer layer, the bonding layer composed of an extrudable melt-processible thermoplastic capable of sufficiently permanent laminar adhesion with the thick outer layer; an interior layer bonded to the intermediate bonding layer, the interior layer composed of a fluoroplastic which is resistant to permeation by and interaction with short-chain aliphatic and aromatic compounds; and an innermost electrostatic dissipation layer.

Abstract: A thermoplastic tube for in-field storage or packaging of bales of agricultural products is disclosed. The tube combines high puncture resistance with an exceptional stretchability, elasticity and good slip properties. The circumference of the tube can be expanded by at least 15% without tearing when stretched in the transverse direction. The tube also shows no substantial permanent deformation 2 hours after being so stretched for a period of time not exceeding 30 minutes and released. Before feeding a bale, the tube is stretched radially to facilitate the insertion and accommodate bales larger than original diameter of the tube. When regaining the original size, the tube wraps up tightly the bales reducing the amount of air trapped in the tube. Since the tube can be enlarged to a variable extent, it may accommodate bales of different shapes and sizes.

Abstract: A flexible hose construction and method of making the same are provided, the flexible hose construction comprising an inner corrugated hose made of polymeric material and having a plurality of outwardly convex projections with recesses therebetween and extending from one end thereof to the other end thereof, an outer sleeve of reinforcing material disposed in telescoping relation on the inner hose, and a tube of polymeric material disposed between the sleeve of reinforcing material and the inner hose and extending in a generally straight-line manner from projection to projection of the inner hose so as to tend to prevent the sleeve of reinforcing material from entering into the recesses of the inner hose an amount that would tend to substantially reduce the flexibility characteristics of the inner hose.

Abstract: The present invention relates to polyamide/polyvinylidine fluoride blends and multilayer tubes made therefrom. The blends have spherical morphology and a polyamide matrix with dispersed polyvinylidine fluoride phases; with the polyamide of the polyamide/polyvinylidine fluoride blend having a shear viscosity of 1.5 to 7 times greater than that of the polyvinylidine fluoride of blend.

Abstract: A pipe comprising a multilayer inner core (1) whose outer layer is made of polyamide or of EVOH to provide an effective barrier function, and outer reinforcement that withstands pressure. The outer reinforcement comprises at least one filamentary reinforcing structure (4) placed around the core (1), a covering outer layer (7), and at least one bonding agent (3, 5) for bonding the reinforcing structure (4) to the inner core (1), the agent being selected from polyurethane or polyamide hot melt adhesives and thermosetting polyesters.

Abstract: A highly flexible and hydrolysis and burst resistant, coolant conduit comprising a plurality of layers of different polymer compatible with one another at the contact surfaces of the layers, the conduit being at least partially corrugated and at least some of the individual adjacent corrugations being connected to each other by at least one crossbar or rib.

Abstract: With a desired intermediate portion as a boundary, in a hose, a corrugated wall is formed on one side of the boundary while a scalene-triangularly corrugated wall is formed on the other side of the boundary, the whole of a hose is formed of a soft synthetic resin material and a hard synthetic resin material in the form of a double-layered wall. The soft synthetic resin material is made thicker than the hard synthetic resin material in a portion on a connection cylindrical portion side while the hard synthetic resin material is made thicker than the soft synthetic resin material in a portion on a drainage cylindrical portion side.

Abstract: A multi-layered plastic pipe particularly suitable for use as an intake manifold of an internal combustion engine is provided. The present pipe includes a hollow plastic core, at least one spacer member provided on the hollow plastic core and an outer layer integrally provided on the outer peripheral surface of the hollow plastic core excepting the spacer member. The spacer member is preferably formed from a plastic material, and the outer layer is also formed from a plastic material. There is also provided a method for manufacturing a multi-layered plastic pipe using a spacer member to prevent a hollow plastic core placed in a mold cavity from being deformed when a molted plastic material is supplied into the mold cavity under pressure.

Abstract: The invention provides a heat recoverable article, like a heat shrinkable tubing, which is used for the joint or terminal arrangement of electric cables, wherein an inner layer is formed on the inner surface of the heat recoverable article comprising a polymer material. A resin composite containing ethylene alkyl(meth) acrylate carbon monoxide copolymer is used for the inner surface, to produce a heat shrinkable tubing having an outstanding adhesive property to adherents, without suffering from foaming during the manufacturing process since this inner layer has little hygroscopic property.

Abstract: A composite tube for use in such applications as an automobile heater hose has inner and outer tubes. The inner tube has a corrugated central section and cylindrical end portions. The outer tube is bonded to the end portions of the inner tube and to the crests of the corrugations. The composite tube has spaced identical end couplings, each with a portion extending into and bonded to the associated inner tube end portion, an end part overlying and bonded to ends of the tube portions and an external flange surrounding and bonded to the reinforcing tube end portion. The couplings include circumferentially spaced end reliefs for facilitating connection of the coupling to a tube such as a fluid inlet to or outlet from an associated automobile radiator or the like. The composite tube is continuously formed in a known manner while the end couplings are molded with a novel and improved mold and process.

Abstract: A laminated hose is present which is suitable for a fuel conducting hose or other hose, or diaphragm, used for example in an automotive vehicle, which structure is required to have excellent heat resistance and gasoline permeation resistance while maintaining suitable properties of bonding and flexibility. The hose is constituted by an inner veneer layer of THV, a terpolymer of tetrafluoroethylene, hexafluoropropylene and vinylidene fluoride, as a permeation barrier layer. This inner layer is reinforced by an elastomeric tie layer, a reinforcing layer and an elastomeric cover.

Abstract: A flexible tubular structure for use in the lining of passageways and methods relating thereto are described. The tubular structure is made of a laminate which comprises a film layer, made by melting and mixing ethylene-vinyl acetate copolymer (EVA) and polyethylene, and a felt layer. In a butt join region of the structure, a felt strip and polyethylene/EVA strip are heat welded for strength.

Abstract: Pursuant to the invention, this objective is accomplished by a multilayer flexible conduit for combustible liquids, particularly for fuels, with an outer layer, an inner pipe and an intermediate layer between the outer layer and the inner pipe. The outer layer comprises a halogen-free and phosphorus-free thermoplastic material. The intermediate layer is made of synthetic fibers that are resistant to high temperatures, a fire-resistant textile yarn or metal fibers. The inner pipe has at least one diffusion-tight layer of a thermoplastic material.

Abstract: A multi-layered hose according to the present invention comprises a rubber outer layer and a resin or metal inner layer which is integrally formed at the inner periphery surface of the rubber outer layer. The thickness of the resin inner layer formed at the inner periphery surface of the edge portion is thinner than that of the resin inner layer formed at the inner periphery surface of a main portion of the hose. Therefore, when a mating pipe is inserted into the hose edge portion, the mating pipe is satisfactorily adhered to the inner surface of the hose edge portion, thereby obtaining excellent sealing.

Abstract: The invention relates to a composite tubular article consisting of a vulcanized elastomer containing carboxylic acid or dicarboxylic acid anhydride functional groups, which is used in combination with a thermoplastic elastomer containing polyamide blocks. The invention also relates to a process for the preparation of such articles, characterized in that a tube consisting of an outer layer of thermoplastic elastomer containing polyamide blocks and optionally an inner layer consisting of a thermoplastic with good liquid-barrier property is sheathed by extrusion at an appropriate temperature of an elastomeric composition comprising a synthetic or natural elastomer containing carboxylic acid or dicarboxylic acid anhydride functional groups, a crosslinking system and optionally various adjuvants and fillers, in that the composite tubular article obtained is vulcanized, preferably at a temperature of between -5.degree. C. and +30.degree. C.

Abstract: An article, for example a pipe, has a first covering such as a polymer layer, and a second covering, such as a repair patch or a repair deposit of melt-on adhesive or a wrap or a sleeve protecting a welded joint between two lengths of such pipe. The second covering may have a functional coating on an underside which is applied on and is at least partially superimposed over the first covering. A cured deposit of thermoset resin is applied at least over the edges of the second covering, for example in the form of a fibrous tape impregnated with a curable resin composition, and bonds to the first and second coverings. The resin deposit provides the second covering with increased stability against displacement laterally of said first covering, for example as a result of soil stress.

Abstract: An improved conduit for transporting fuel and/or fuel vapor or a motion transmitting member in an automobile comprising an inner tube comprised of fluorocarbon polymeric material and having an inner surface for contacting and containing fluids or a motion transmitting member, and a chemically etched outer surface having a substantial portion of the fluorine of the fluorocarbon polymer substituted by a polar moiety. The conduit further includes an outer tube comprising an inner surface comprised of polymeric material containing sufficient polar groups such that hydrogen bonding at the interface between the outer surface of the inner tube and the inner surface of the outer tube prevents substantial relative separation of or movement between the inner and outer tubes.

Abstract: Polyfluorocarbon/elastomer bonded laminates are disclosed. Flexible, durable chemical-resistant hose for use in industrial applications, and improved construction for such hose including inner tube members characterized by a dual-layer feature employing such laminate, is also disclosed. This feature comprises an adhesive elastomeric composition which bonds a polyfluorocarbon thermoplastic veneer to a substantially non-polar chemical-resistant carbon-based elastomeric or thermoplastic elastomeric outer layer. The adhesive elastomeric composition useful in the present invention comprises unsaturated polymeric dicarboxylic acids, or derivative adducts, of ethylene propylene diene terpolymer.

Abstract: A hose capable of exhibiting increased flexibility and lubricity. The hose is made of soft synthetic resin containing a slidability providing silicone resin material. In particular, the slidability providing silicone resin material contained in a surface layer of the hose or ribs formed on a surface of the hose. In production of the hose, re-dispersion of the resin material and forcing of layers of the hose against each other are carried out. Alternatively, a layer containing the resin material and a layer free of the resin material are co-extruded.

Abstract: A fuel hose comprising an outer rubber layer wherein polysulfide is crosslinked so that polysulfide bonding density is not less than 4.times.10.sup.-5 mol/cm.sup.3 and an epoxy compound having epoxy equivalent at not more than 300 is contained, and an inner polyamide resin layer which is laminated on the inside face of the outer rubber layer and bonded thereon by heat treatment. Since the polyamide resin powder is melted by the heat treatment and the polysulfide bonding decomposes so that the resultant residue after decomposition combines with polyamide molecules, resulting in a direct and strong bonding of the outer rubber layer and the inner polyamide resin layer. Moreover, since the special epoxy compound is mixed therein, it is possible to set up the heat treatment condition at a rather mild one.

Abstract: A flexible partition member for a hydraulic accumulator, which divides an interior of a shell of the accumulator into two sections that provide a gas chamber and a liquid chamber, respectively. The flexible partition member includes an integrally layered composite portion which includes at least one gas-barrier layer and at least one elastic layer, each gas-barrier layer containing a copolymer of ethylene and vinyl alcohol, and each elastic layer containing as a major component thereof a polyamide resin selected from the group consisting of nylon 6, nylon 66, nylon 6-10 and nylon 6-12. The integrally layered composite portion includes two adjacent layers which include a gas-barrier layer and an elastic layer.

Abstract: The invention is directed to a hot water resistant pressure hose (1) comprised of an inner tubing (2) made of an elastomer safe for use with food, preferably silicone, whose outer surface (3) has wound around it a plurality of multifilament polyester yarns (7, 8) forming a braid structure (4). This results in a braiding (4) having meshes (6) for establishing a positive-engagement bond between the inner tubing (2) and an outer tubing (9) made of an elastomer, preferably silicone, that is applied to the braiding (4). The outside diameter D of the inner tubing (2) is smaller than or equal to 6 mm, preferably 4.7 mm. For each winding direction, 10 to 15, preferably 12 polyester yarns (7, 8) are used, with the polyester yarns (7, 8) having a diameter that results at a weight of 250 den, minimum, and 310 den, maximum, preferably 280 den. Further, each mesh (6) is to cover an area of between 0.25 mm.sup.2 and 2.25 mm.sup.2, preferably 1 mm.sup.2. A pressure hose (1) is obtained which is hot water resistant (95.

Abstract: A laminated fuel line has an inner layer of a synthetic material such as Nylon, an intermediate vapor barrier layer that contains a polyethylene terephathalate material (such as MYLAR), and an outer layer preferably of a high temperature resistant thermoplastic material such as a polyamide or VICHEM olefinic/PVC. A channeled fuel tube has an inner fuel jacket concentrically formed within and spaced from a relatively larger outer jacket, each of which can be formed with the laminated structure above. A connector for the channeled fuel line has a tubular end connecting element for connecting between the inner and outer fuel lines, a tubular inner connecting element for connecting to the inner line through the end connecting element, and a tubular outer connecting element connecting over both the end connecting element and the inner connecting element. The outer connecting element has a first passageway for communicating with the inner line and a second passageway for communicating with the outer line.

Abstract: A method for manufacturing a double jacketed fire hose, and a double jacketed fire hose comprising an inner jacket and an outer jacket, the inner jacket being encapsulated with polyurethane, the inner jacket residing within the outer jacket, the inner and outer jacket having a controlled net twist.

Abstract: An inner liner for a tubular casing, with the casing having a support means for coaxially supporting the liner within the casing. The liner has an axis and is made of material having a different coefficient of linear expansion than the casing, and comprises at least one tubular section having an outer surface which defines at least one conical support section for resting against the support means at contact points with the support means. The contact points are located on generatrices of a conceived cone or pyramid, with the generatrices radiating from a fixed point on the axis of the liner coinciding with the tip of the cone or pyramid.

Abstract: A method for manufacturing a double jacketed fire hose, and a double jacketed fire hose comprising an inner jacket and an outer jacket, said inner jacket being encapsulated with polyurethane, said inner jacket residing within said outer jacket, said inner and outer jacket having a controlled net twist.