One aspect of the invention provides a composite refrigeration line set including at least one selected from the group consisting of: a suction line and a return line, characterized in that one or more of the suction line and the return line are a composite refrigeration line set tube include: an inner plastic tube; a first adhesive layer positioned about the inner plastic tube; an aluminum layer positioned about the first adhesive layer and coupled to the inner plastic tube via the first adhesive layer; a second adhesive layer positioned about the aluminum layer; and an outer plastic layer positioned about the aluminum layer coupled to the aluminum layer via the second adhesive layer. The inner plastic tube is polyethylene of raised temperature. The outer plastic tube is polyethylene of raised temperature. The aluminum layer comprises AL 3005-O.

One aspect of the invention provides a composite refrigeration line set including at least one selected from the group consisting of: a suction line and a return line, characterized in that one or more of the suction line and the return line are a composite refrigeration line set tube include: an inner plastic tube; a first adhesive layer positioned about the inner plastic tube; an aluminum layer positioned about the first adhesive layer and coupled to the inner plastic tube via the first adhesive layer; a second adhesive layer positioned about the aluminum layer; and an outer plastic layer positioned about the aluminum layer coupled to the aluminum layer via the second adhesive layer. The inner plastic tube is polyethylene of raised temperature. The outer plastic tube is polyethylene of raised temperature. The aluminum layer comprises AL 3005-O.

A resin composition for a refrigerant-transporting hose contains a thermoplastic resin and an elastomer, the thermoplastic resin and the elastomer forming a sea-island structure of a matrix of the thermoplastic resin and a domain of the elastomer, the resin composition having a P(O.sub.2), an M10, and a P(H.sub.2O) satisfying2: 0 < P(O.sub.2) x M10 ≤ 150 and log(P(H.sub.2O)/P(O.sub.2)) ≤ 0.9, where the P(O.sub.2) is an oxygen permeability coefficient [cm.Math.cm.sup.3/(cm.sup.2.Math.s.Math.cmHg)] at a temperature of 21° C. and a relative humidity of 50%, the M10 is a 10% modulus [MPa] at a temperature of 25° C., and the P(H.sub.2O) is a water vapor permeability coefficient [cm.Math.cm.sup.3/(cm.sup.2.Math.s.Math.cmHg)] at a temperature of 60° C. and a relative humidity of 100%.

A flexible pipe for subsea transportation of production fluids, a method of manufacturing flexible pipe body and a method of providing corrosion protection to armour wires of at least one tensile armour layer of a flexible pipe having a breached pipe annulus are disclosed. The flexible pipe comprises a fluid retaining layer, an outer sheath and at least one tensile armour layer comprising a plurality of helically wound monofilament armour wires of a first material, each having a non-circular cross section with an aspect ratio of greater than 1:2 disposed between the fluid retaining layer and the outer sheath. The tensile armour layer further comprises at least one helically wound elongate anode element substantially having a cross-section aspect ratio of 1:1 and comprising a further material, interposed between armour wires, the anode element cross section having an area that is 50% or less of a corresponding area of said non-circular cross section.

A hose is provided capable of meeting fireproof requirements per AS1055 under no flow condition. The hose has multiple layers including a yttria-stabilized zirconia (YSZ) flexible ceramic substrate layer disposed between first and second silicone rubber layers.

Apparatus and associated methods relate to a shapeable conduit. In an illustrative example, the shapeable conduit may have a circumferentially flexible wall extending along a longitudinal axis. The wall may, for example, define a lumen configured to receive one or more cables. Multiple longitudinally extendable manually deformable axial stiffening members may, for example, be circumferentially distributed in the wall. A releasable coupling mechanism may, for example, have at least two mating engagement members. The engagement members may, for example, releasably engage in an enclosed state such that the wall circumscribes the lumen. The engagement members may, for example, be tangentially separable into an open state such that the cables can be radially transferred between an interior and an exterior of the lumen. Various embodiments may advantageously be manipulated such that the axial stiffening members cause the flexible wall to retain cables enclosed within the lumen in a desired configuration.

Disclosed herein is a polyvinyl chloride (PVC) hose with a leak notification function. The PVC hose includes: an inner layer configured such that a fluid is transferred through a hollow; a reinforcing yarn layer wound around the inner layer, and configured to increase the pressure of the inner layer and restrain expansion; an intermediate layer formed through coating around the reinforcing yarn layer; a first electrode layer formed through coating around the intermediate layer, and provided with a first terminal; a partition layer formed through coating around the first electrode layer; a second electrode layer formed through coating around the partition layer, and provided with a second terminal; a high-density woven yarn layer processed around the second electrode layer; an outer coating layer formed through coating around the high-density woven yarn layer; and a leak detection device configured to determine whether there is a leak depending on whether current is conducted.

A braided tube includes a hollow cylindrical inner resin layer made of thermoplastic polyurethane resin, a braided wire including braided strands made of nylon and being provided over a periphery of the inner resin layer, and an outer resin layer made of thermoplastic polyurethane resin and being provided to cover peripheries of the inner resin layer and the braided wire. A width of a void formed around the strand of the braided wire in a cross section perpendicular to a tube longitudinal direction is 30 μm or less.

A single layer/ply multi-use hose is contemplated. A thermoplastic polymer, such as polyurethane, is extruded through a woven tubular mesh of aramid fibers so as to encourage pillaring through gaps in the mesh of a sufficient amount to improve the overall durability and strength of the resultant hose. This wide diameter (at least 4 inches) and long continuous length (at least 300 feet) hose exhibits excellent durability (e.g., resistance to abrasion and/or punctures) and tensile ratios in excess of 2:1 so as to withstand tensile loads in excess of 100,000 pounds without delamination or bubbling within the hose wall.

In certain embodiments, a hose includes an inner tube, a filler material, and an outer cover. The inner tube has a cross-sectional shape and includes a cavity for transporting a substance. The filler material is provided around an outer periphery of the inner tube. The filler material includes a self-sealing material or a self-healing material. The outer cover is provided around an outer periphery of the filler material such that the filler material is between the outer cover and the inner tube. The outer cover has a D-shaped cross-sectional shape.