Abstract: A method for manufacturing a flexible tubular underwater pipe (10): A leakproof tubular structure (12, 14, 16) is covered with at least one layer (18, 20) of armor wires. At least one continuous longitudinal element made of a deformable material is wound in a helix with short pitch around the layer (18, 20) of armor wires to form a holding layer 24. The at least one longitudinal element is wound under longitudinal tension T0 so as to stretch its deformable material according to a relative elongation corresponding to a tensile stress ?0 less than the elastic limit value ?E of the deformable material, and the elastic limit value ?E corresponds to a tensile stress beyond which the deformation of the material is irreversible.

Abstract: A heat-resistant hose for a vehicle available at a low cost and excellent in interlayer adhesiveness includes: an inner layer; and an outer layer directly formed on an outer peripheral surface of the inner layer, in which the inner layer comprises a fluorine-based rubber composition containing the following components (a) to (e): (a) a fluorine-based rubber; (b) a polyol-based vulcanizing agent; (c) an organic onium compound; (d) magnesium oxide; and (e) calcium hydroxide, and the outer layer comprises an acrylic rubber composition containing the following components (A) to (C): (A) an acrylic rubber; (B) a benzenediol; and (C) at least one of an imidazole compound and a diamine-based vulcanizing agent.

Abstract: Embodiments disclosed herein relate to one or more embodiments of and methods to make a reinforced flexible pipe. The reinforced flexible pipe includes a pipe structure, a first composite tape member having a T-shaped cross section, and a second composite tape member having a T-shaped cross section, in which the first composite tape member is wrapped on the pipe structure in a first orientation and the second composite tape member is wrapped on the pipe structure in a second orientation. One or more embodiments relate to a method of forming the same.

Abstract: A hose for use in bio-pharmaceutical applications includes an innermost tubular layer made from a fluoropolymer material. The tubular layer has an inner, relatively smooth and pure surface that defines an opening for transfer of various media. A layer of silicone is disposed next to an outer surface of the innermost tubular layer through use of, for example, an extrusion method. The outer surface of the tubular layer may first be modified by various treatments or chemicals to facilitate the adhesion of the silicone layer thereto. The silicone material may be solid or foamed. A reinforcement layer may be disposed adjacent to an outer surface of the silicone layer. The reinforcement layer may be formed of a wire braid having gaps. An outer jacket of silicone may be attached to the reinforcement layer and to the inner silicone layer through the gaps in the reinforcement layer.

Abstract: A pipe lining composition and a method for installing the pipe lining composition into a pipeline requiring repair is provided. The lining composition is a layered lining composite formed of alternating plies of felt and carbon fiber strand reinforcing such that layers of carbon fiber reinforcing strands are trapped between layers of felt. Once the composite is laid up the composite is preferably stitched to provide stability and to maintain the layers relative to one another and then formed into a tube. In accordance with the method, the lining tube is then sequentially filled resins of increasing viscosity as it is drawn through rollers in a manner that fully wets out the carbon fiber before it is placed into the pipe to be lined.

Abstract: A tubular liner for pipelines includes an inner tubular film and a fiber material layer located on the film and impregnated with a reactive resin curable under UV light. The film contains a styrene-proof and thermally weldable carrier material having a laminated non-woven layer on its outer side facing the fiber material. The carrier material includes an overlapping region along the film. Edge sections of the carrier material are thermally welded together in the overlapping region. The non-woven layer on the outer side of the radially inner lower edge section in the overlapping region is thermally welded to the carrier material on the lower side of the radially outer upper edge section, and the radially outer upper edge section in the overlapping region has a structure on its outer side enabling a durable adhesion of reactive resin. A method for manufacturing the tubular liner is provided.

Abstract: The flexible tubular moulded body (10) comprises an unprofiled or profiled straight or bent shaped and a circumferential wall (11) provided with a corrugated profile (12), which is formed from a strength support insert embedded in a thermoplastic material comprising cord surfaces running in the longitudinal direction of the moulded body as pressure support elements and fixing threads running transversely to the threads and holding these in position.

Abstract: The present invention relates to a crosslinked rubber composition based on at least one elastomer of ethylene-propylene-diene terpolymer type (EPDM) and on at least one phase-change material (PCM), to a process for preparing this composition and to a multilayer pipe incorporating it. This composition includes at least 100 phr (phr: parts by weight per one hundred parts of elastomer(s)) of at least one phase-change material (PCM), and it is such that said at least one PCM is dispersed in the crosslinked composition and is provided with protection means that are capable of preventing its dispersion therein at a temperature above its melting point, which composition has a breaking strength of greater than 3 MPa and/or an elongation at break of greater than 100%, these properties being measured at 23° C. according to standard ASTM D 412.

Abstract: The invention relates to a flexible armored pipe for transportation of fluids, comprising an inner sealing sheath and at least one displacement reduced armor layer comprising a plurality of elongate elements comprising at least a female type elongate element comprising at least one recess in each opposite side and a male type elongate element comprising at least one protruding tongue in each opposite side and wherein each of the female type and the male type elongate elements are substantially symmetrical in a symmetry line substantially normal to the inner sealing sheath when the pipe is in a non-bended state and where said protruding tongues of said male type elongate element windings are engaged in said recesses of adjacent female type elongate element windings.

Abstract: The present disclosure relates to a flexible tubular pipe (1) of the unbonded type and including, from the inside to the outside, an internal carcass (2), first and second polymeric sheaths (3, 4), at least one tensile armor layer (6, 7) and a polymeric sealing sheath (8) and also at each of its ends, a connecting endpiece (10) comprising i.a., a tubular sleeve (15). The tubular sleeve (15) of a first endpiece (10) includes means (30, 31, 32) for draining the gases from the gap (25) between the sheaths (3, 4) towards the outside of the pipe (1) and the tubular sleeve of the second endpiece (10) including means for draining the gases from the gap (25) between two sheaths (3, 4) towards the outside or towards the inside of the pipe (1).

Abstract: To produce a flexible pipe body, a length of tensile armour element (300) of pre-preg composite material is fed towards a fluid-retaining layer (602). The tensile armour element (300) passes through a guide (604) an a pre-heater (606). The tensile armour element (300) is then applied to the fluid-retaining layer (602), being wrapped around the fluid-retaining layer (602) by virtue of the rotation of the layer (602), the linear translation of the layer (602), and the fixed position of the tensile armour element feed (601). The element (300) is fed to the fluid-retaining layer under a constant, predetermined controlled tension. Positioning head (608) helps to position the element (300) on the fluid-retaining layer (602). As tensile armour element is wound onto the pipe body, the pipe body continues to move in a, linear direction and the pipe body moves through an oven (610).

Abstract: An unbonded flexible pipe for transportation of fluids and comprising a tubular inner sealing sheath defining a bore. At least one armor layer surrounds the inner sealing sheath and a carcass is arranged in the bore to support the inner sealing sheath. The carcass comprises at least one profiled elongate element, which is helically wound to form directly and/or indirectly engaging elongate element windings along the length of the pipe. The carcass provides a quasi fluid permeable inner wall of the bore with discontinuities between successive turns of the wound elongate element(s). The discontinuities have an average width in the axial direction of the pipe which is about 3 mm or less when the pipe is in an unloaded and unbent condition, and the pipe can bend with a minimum bending radius of about 10 m or less in an unloaded condition.

Abstract: A latex marking ink suitable for marking rubber articles has been developed. The ink comprises vulcanizable rubber latex, pigment, vulcanizing agent, and non-ionic stabilizer dispersed in water. Shear stability is dramatically and unexpectedly increased by the presence of the non-ionic stabilizer even though viscosity also increases.

Abstract: A method and structure are provided for implementing leak prevention of water cooling hoses. A water cooling hose includes an inner hose layer and an outer hose layer. Potential water leaks are prevented from the water cooling hose or tubing by sealing of the cut end of the tubing after sizing of the water cooling hose has been completed. The cut end of the water cooling hose is dipped into a selected solution bath, and upon removal a seal is formed before hose assembly is provided.

Abstract: The invention relates to an unbonded flexible pipe for sub sea transportation of fluids. The pipe has a length and comprises a tubular inner sealing sheath defining a bore and an axis of the pipe. In a pipe length section it comprises a second sealing sheath surrounding the inner sealing sheath and forming an annulus between the inner sealing sheath and the second sealing sheath. The annulus provides a primary maintaining passage along the length of the pipe length section with a first and a second end. The pipe comprises at least one secondary maintaining passage along the length of the pipe with a first and a second end. The secondary maintaining passage is arranged with an axial distance which is larger than the axial distance of the inner sealing sheath.

Abstract: A polyamide resin composition is provided which contains an anti-aging agent together with a deterioration inhibitor, such as a metal compound or a silica-based inorganic compound, for preventing deterioration caused by, for example, an acid component or a halogen component contained in a refrigerant or an oil, and which satisfactorily produces an anti-aging effect expected by adding the anti-aging agent. For producing a polyamide resin composition containing an (a) polyamide resin, a (b) polyolefin-based elastomer, at least one (c) deterioration inhibitor selected from the group consisting of hydroxides, oxides and basic salts of divalent or trivalent metals, and silica-based inorganic compounds, and a (d) anti-aging agent, a mixture prepared by mixing and kneading the (c) deterioration inhibitor and (b) polyolefin-based elastomer and a mixture prepared by mixing and kneading the (a) polyamide resin and the (d) anti-aging agent are mixed and kneaded.

Abstract: A flexible pipe body and method of producing a flexible pipe body are disclosed. The flexible pipe body includes an inner fluid retaining layer; an armour layer provided radially outwards of the inner fluid retaining layer; and a buoyancy layer including a plurality of discrete elongate buoyancy elements provided radially outwards of the fluid retaining layer wound at a helical pitch angle equal to or more than 0 degrees and less than about 85 degrees to the longitudinal axis of the flexible pipe body.

Abstract: A hose for refrigerant transport use comprising an inner layer with superior deterioration resistance performance. The innermost layer comprised in the hose for refrigerant transport use of the present invention is formed using a polyamide resin composition comprising a polyamide and, per 100 parts by mass thereof, from 0.5 to 20 parts by mass of an acid acceptor.

Abstract: A flame resistant hose having a nitrile-containing rubber inner tube layer; two reinforcing plies one or more insulating plies of rubberized fiberglass unidirectional cord fabric helically wrapped at a helix angle in the range of 40-60 degrees with respect to the hose longitudinal axis and with the edges of each reinforcing ply overlapping up to about 0.5 inches; an optional rubber cushion or tie layer between the reinforcing plies and the insulating plies; and a polychloroprene rubber outer cover layer. The hose may have one or more helical wires embedded in the hose such as between the two reinforcing layers. The hose successfully passes fire resistance testing when tested according to BS ISO 15540:1999 incorporating amendment number 1.

Abstract: Disclosed herein is a variably flexible pipe including at least one flap member having variable flexibility and a tube formed of an elastically deformable material and accommodating the at least one flap member, and a manipulator having the same. The at least one flap member may include a plurality flap parts and a connection part to which one side of each of the plurality of flap parts is connected, and the tube changes pressure applied to the plurality of flap parts according to a controlled change of the inner pressure of the tube, thereby causing the variably flexible pipe to be effectively selectively maintained in a deformed state.

Abstract: A flexible pipe body and method of producing a flexible pipe body are disclosed. The method includes providing a tubular layer; and directing a chemical reagent towards a surface portion of the tubular layer, wherein the tubular layer comprises an extruded polymer, and wherein the chemical reagent is suitable for changing one or more physical or mechanical property of a proportion of the extruded tubular layer thickness.

Abstract: A flexible pipe body and methods of producing a flexible pipe body are disclosed. The method may include providing a tubular length of polymeric material for forming a polymeric layer of flexible pipe body; providing a strength layer radially outwards of the polymeric layer; and treating the polymeric layer with a non-ambient temperature and pressure.

Abstract: A flexible non-porous laminate film structure is provided comprising a textile substrate having a fluorinated film laminated thereto, which is laminated at a temperature lower than the softening point of the predominant polymeric component of the fluoropolymer fiber. The resulting product is resistant to delamination.

Abstract: A pipe for carrying a fluid, having a longitudinal axis and defining a radial aperture for release of a jet of fluid having a radial direction component ?, the aperture having an aspect ratio greater than 2 and arranged with its elongate axis within 30 degrees of the longitudinal axis and having area greater than 0.2 the cross-sectional area of the pipe, the fluid jet having an angle ? between 30 and 80 degrees from the longitudinal axis.

Abstract: A fuel line comprising a thermoplastic composition is described. The thermoplastic compositions exhibit high strength and flexibility and can be used to form one or more layers of single layer or multi-layer fuel lines. Methods for forming the thermoplastic compositions are also described. Formation methods include dynamic vulcanization of a composition that includes an impact modifier dispersed throughout a polyarylene sulfide. A crosslinking agent is combined with the other components of the composition following dispersal of the impact modifier. The crosslinking agent reacts with the impact modifier to form crosslinks within and among the polymer chains of the impact modifier. The compositions can exhibit excellent physical characteristics at extreme temperatures.

Abstract: Pipe insulation, such as may be used to insulate the condensate pipe of a heating appliance such as condensing boiler, the pipe insulation comprising a flexible internal conduit surrounded by a flexible layer of insulation, in which the layer of insulation comprise fibers between which is trapped air. Typically, the insulation layer can comprise a silica nanoporous aerogel with reinforcing fibers.

Abstract: The present invention provides a highly heat-resistant multi-layer molded article having excellent adhesion between layers and which can be inexpensively produced and easily recycled. The multi-layer molded article comprises an innermost layer including a first polyarylene sulfide-derived resin composition having 95% to 91% by mass of a polyarylene sulfide-derived resin and 5% to 9% by mass of an olefinic (olefine-derived) elastomer, and an outer layer disposed on an outer-side of the innermost layer, including a second polyarylene sulfide-derived resin composition having 5 to 35 parts by mass of reinforced fibers and 100 parts by mass of a third polyarylene sulfide-derived resin composition having 95% to 80% by mass of a polyarylene sulfide-derived resin and 5% to 20% by mass of an olefinic elastomer.

Abstract: The present disclosure relates to a flexible submarine pipe comprising a plurality of layers, at least one layer of which comprises a polymer resin comprising at least one alumino-silicate or magnesium silicate nanotube chemically bonded to the polymer by a covalent bond, the method for preparing same and the use thereof for the transport of fluids, especially hydrocarbons.

Abstract: A method is presented for making a composite material from strips comprising longitudinal fibers and a binder or resin, which material comprises a number of layer assemblies one on top of the other. Each layer assembly comprises m sets (with m at least 2) of parallel strips each extending in a different direction, Each layer assembly is manufactured by successive steps of depositing groups of parallel strips according to a well defined pattern (without longitudinally interweaving strips with previously deposited strips). Before completing a layer assembly, with the exception of the last layer assembly, by depositing its last group of parallel strips, the first group of parallel strips of the following layer assembly is already deposited. A composite material manufactured with such a method is presented too.

Abstract: A hot gas conducting component, in particular for an exhaust system of an internal combustion engine, is described. To improve the insulation effect, an insulation to which heat-reflecting and/or heat-absorbing pigments are added is arranged at the component.

Abstract: Compact flexible reinforce rubber hose adapted for conveying fluids under high pressure. The hose includes a thin inner tube formed of a vulcanized rubber.

Abstract: A fuel hose (10) includes a laminated layer structure including: an intermediate layer (12) containing polyvinyl alcohol and/or an ethylene-vinylalcohol copolymer; an inner layer (11) disposed on an inner periphery of the intermediate layer; and an outer layer (13) disposed on an outer periphery of the intermediate layer and containing a rubber. The inner layer (11) includes: a first component containing nitrile rubber; and cross-linked chains formed of carbon-carbon single bond, and is directly laminated to the intermediate layer (12).

Abstract: The present invention relates to a fully laminated flexible ventilation duct, which is used in the ventilation systems in order to convey the conditioned air into the spaces to be subject to air conditioning, wherein said ventilation duct is self heat-insulating and has a flexible structure.

Abstract: Blow molded articles are made from a polymeric composition containing a polyphenylene sulfide resin. The composition can further contain a reinforcing agent, such as glass fibers, and a combination of an organosilane coupling agent and an impact modifier. It was discovered that the combination of the aminosilane coupling agent and the impact modifier substantially increased the low shear viscosity and melt strength of the composition without increasing the high shear viscosity of the composition. The increase in the low shear viscosity makes the composition particularly well suited to molding articles with a complex shape. When producing blow molded articles, for instance, the composition provides better control over wall thickness while having improved interior surface smoothness at higher throughput and extrusion rates.

Abstract: A flexible-to-rigid tube is flexible when routed and is then rigidized to increase burst strength. According to the preferred embodiments of the present invention, the flexible-to-rigid tube is included in a cooling plate assembly for transferring heat from electronic components mounted on a circuit board. In one embodiment, the flexible-to-rigid tube (while in a flexible state) includes a polydimethylsiloxane (PDMS) or other silicone containing pendant or terminal epoxy, vinyl and/or acrylate functional groups and an initiator (e.g., a sulfonium salt photoinitiator, a free radical photoinitiator, or a thermal initiator). In another embodiment, triallyl isocyanurate (TAIC) and an initiator are incorporated into a conventional PVC-based tubing material. The flexible-to-rigid tube changes from the flexible state to a rigid state via formation of a cross-linked network upon exposure to actinic radiation or heat.

Abstract: A water-permeable pipe includes inner and outer tubular units cooperatively defining an outer passage therebetween. Each tubular unit includes a water-permeable outer layer coated with a waterproof inner layer, two end portions, and an interconnecting member including a plurality of spaced apart joints that interconnect the end portions. The end portions of the inner tubular unit are diametrically opposite to the end portions of the outer tubular unit. Each adjacent pair of the joints define an interstice therebetween that permits water to flow therethrough and that fluidly communicates an inner passage in the inner tubular unit and the outer passage, and the outer passage and an external environment, respectively.

Abstract: A highly corrosion and abrasion resistant coating combination for high precision metal tubing comprises a passivation layer applied to the tubing and a thermoplastic jacket extruded onto the passivated tubing.

Abstract: Tubing comprising an inner layer, an outer layer and a middle layer, wherein the inner layer comprises a polyethylene, the outer layer comprises a thermoplastic polyurethane and the middle layer comprises an ethylene ethyl acrylate copolymer or an ethylene methyl acrylate copolymer or an anhydride grafted ethylene methyl acrylate copolymer, a copolymer of two or more of the acrylate copolymers or a mixture of two or more thereof.

Abstract: A tube comprising an inner layer, an outer layer and a barrier layer disposed between the inner layer and the outer layer, wherein the barrier layer is bound to the outer layer by a layer of adhesive disposed between the outer layer and the barrier layer and the barrier layer is bound to the inner layer by a layer of adhesive disposed between the inner layer and the barrier layer, wherein the inner layer comprises a polyethylene, the outer layer comprises a thermoplastic polyurethane and the barrier layer comprises a material that acts as a barrier to gas.

Abstract: A wrappable, styrenic thermal insulation product for application to flexible, armored pipe is in the form of an elongate tape of generally rectangular cross-section, optionally being provided with interlocking and/or overlapping portions so as to provide a continuous insulating layer when one or more layers of the tape are wound around the pipe. The interlocking and/or overlapping portions may be of various configurations. The tape is comprised of polystyrene or a styrene-based thermoplastic having high compressive creep resistance, high compressive strength and low thermal conductivity and may be foamed or unfoamed. A flexible, armored pipe incorporates one or more layers of the wrappable, styrenic thermal insulation product between an outer armor layer and an outer polymeric sheath.

Abstract: A hose for transporting refrigerant includes an inner tube layer having a gas barrier layer and a rubber layer adjacent to the outer surface of the gas barrier layer. The gas barrier layer is formed using a thermoplastic resin composition comprising a polyamide resin and a modified rubber having an acid anhydride group or an epoxy group, the modified rubber being obtained by modifying a modified raw rubber having an acid anhydride group or an epoxy group with a hydrogen bond-forming compound having a functional group which reacts with the acid anhydride group or the epoxy group and a functional group which is able to form a hydrogen bond with an amide bond or a hydroxyl group. The rubber layer is formed using a rubber composition comprising from 1 to 15 parts by mass of an alkylphenol-formaldehyde resin per 100 parts by mass of a raw rubber.

Abstract: A process for manufacturing a heat-insulated uncoupling element as well as an uncoupling element itself are proposed, wherein the heat insulation is provided along the corrugated area of bellows. The heat insulation consists of a coating, which contains heat-insulating granular material. The mobility of the bellows is also ensured here after application of the heat insulation.

Abstract: A hose for use in bio-pharmaceutical applications includes an innermost tubular layer made from a fluoropolymer material. The tubular layer has an inner, relatively smooth and pure surface that defines an opening for transfer of various media. A layer of silicone is disposed next to an outer surface of the innermost tubular layer through use of, for example, an extrusion method. The outer surface of the tubular layer may first be modified by various treatments or chemicals to facilitate the adhesion of the silicone layer thereto. The silicone material may be solid or foamed. A reinforcement layer may be disposed adjacent to an outer surface of the silicone layer. The reinforcement layer may be formed of a wire braid having gaps. An outer jacket of silicone may be attached to the reinforcement layer and to the inner silicone layer through the gaps in the reinforcement layer.

Abstract: The present invention relates to a pipe usable for an air intake circuit of a motor vehicle engine, and to this air intake circuit in particular for the intake of air at the outlet of a turbocompressor that comprises at least one such pipe. This pipe (1) comprises at least one inner elastomer layer (10), one outer elastomer layer (16), one intermediate elastomer layer (12) and one reinforcing structure (14) which is situated between the intermediate and outer layers and which comprises yarns based on an aliphatic polyester, such as a PET, each intermediate and outer layer being formed from a composition based on at least one acrylate copolymer (ACM). According to the invention, said composition is crosslinked by means of a system chosen from the group consisting of those based on at least one soap combined with sulfur, with a urea derivative and those based on a thiadiazole.

Abstract: [Problem] To provide a light-weight air conditioning duct for vehicle that is light in weight and excellent in mechanical strength. [Solution] The present invention is directed to a light-weight air conditioning duct for vehicle 1 for letting conditioned air supplied from an air conditioning unit pass through to a desired location, the duct being obtained by blow-molding a mixed resin including a polypropylene-based resin for foaming and a hydrogenated styrene-based thermoplastic elastomer, and the duct having an Izod impact strength equal to or larger than 10 J/m at ?20 degrees Celsius.

Abstract: A hose having a low permeation rate, in particular a hose for a high temperature coolant, having at least the following layer configuration: a barrier layer in the form of monofilm or multilayer film made of a polymer material; an inner layer that is placed on top of the barrier layer and is made of a polymer material having elastic properties; a reinforcement supported by the inner layer made of threadlike material, and an outer layer made of a polymer material having elastic properties, which protects against external influences. The reinforcement features a spiraled shape, specifically by forming at least two spiraled layers, wherein the area between two spiraled layers is free of an intermediate layer of a polymer material. In addition, the area between two spiraled layers is in particular free of a bonding agent. Further a method for producing such a hose is disclosed.

Abstract: A pressure washer is provided. The pressure washer includes a fluid inlet and a pump disposed to receive fluid from the fluid inlet. A spray gun is provided that includes a first outlet and a separate second outlet. A first conduit fluidly connects the fluid inlet and the pump with the first outlet and a second conduit fluidly connects the fluid inlet with the second outlet.

Abstract: A hose comprising an inner tubular structure, an outer tube and an insulation layer, wherein the inner tubular structure comprises a tubular body disposed between inner and outer gripping members, the tubular body including a sealing layer, and being formed of a material capable of withstanding cryogenic temperatures, wherein the outer tube comprises a rubber layer and a reinforcing layer disposed around the rubber layer, wherein the insulation layer is either incorporated in the inner tubular structure and/or is disposed between the inner tubular structure and the outer tube.

Abstract: The invention relates to a unbonded flexible pipe and a method for manufacturing such pipe. The unbonded flexible pipe has a length and a center axis along its length, and comprises an internal sealing sheath around its center axis, a carcass arranged inside the internal sealing sheath, and at least one armor arranged around the internal sealing sheath. The carcass comprises at least one helically wound elongate carcass reinforcement element providing a plurality of carcass reinforcement element windings along the length of the pipe wherein the carcass reinforcement element windings surround and/or are surrounded by a polymer structure, which polymer structure locks said carcass reinforcement element windings relative to each other. Accordingly the carcass reinforcement element windings need not be directly interlocked with each, but are mainly or totally locked to each other by the polymer structure.

Abstract: The invention concerns an unbonded flexible pipe with a length and a center axis along its length. The unbonded flexible pipe comprises an internal sealing sheath surrounding the center axis, and at least two tensile armor layers comprising cross wound elements surrounding the internal sealing sheath. The two tensile armor layers comprise a first tensile armoring layer comprising a plurality of first helically wound, elongate armoring elements, and a second tensile armoring layer comprising a plurality of second helically wound, elongate armoring elements. The first helically wound, elongate armoring elements consist of a first material or a first combination of materials and the second helically wound, elongate armoring elements consist of a second material or a second combination of materials, where the first material or the first combination of materials is different from the second material or the second combination of materials.