Abstract: A layered tubing for use in a motor vehicle composed of a thick outer tubing having an inner and an outer face, the outer tubing made of an extrudable thermoplastic such as a polyamide such as Nylon 6; 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 to the polyamide outer tubing; and an inner hydrocarbon barrier layer bonded to the intermediate bonding layer, the inner layer composed of an extrudable, melt processible thermoplastic capable of sufficiently permanent laminar adhesion with the intermediate bonding layer, the thermoplastic containing as a major constituent a fluoroplastic such as polychlorotrifluoroethylene, ethylene tetrafluoroethylene copolymers and the like.

Abstract: In a method for reinforcing defective portions of a pipeline, the defective portions are identified by conventional techniques, soil is excavated from around the pipeline to expose the deteriorated portions, any corrosion protection material is removed and the surface of the pipeline is cleaned. Gouges, dents and corrosion pitting are filled with an uncured filler material and, while the filler material is in an uncured workable state, a plurality of convolutions of a high tensile strength material are wrapped around the defective portion of the pipeline with a layer of a curable adhesive applied between adjacent convolutions. The adhesive then cures to a strongly adhesive state and the filler material cures to a rigid state capable of transferring the fluid pressure load within the pipeline almost instantaneously to the reinforcement band.

Abstract: Thermally insulative sleeves include a seamless, hollow, flexibly resilient inner tubular member woven of strand material including at least one metal wire strand, a separate, integral, at least essentially unbroken, metal surface member applied over the inner tubular member extending along and at least essentially completely surrounding the inner tubular member and a flexible outer cover also woven of strand material extending along and completely around the inner tubular member and metal surfaced member securing the metal surface member with the inner tubular member and offering some degree of protection. The inner tubular member may be knit from wire or from a combination of wire and glass fiber yarn, the latter providing some thermal insulative protection. The metal surfaced member may be foil or some other metal covered composite or laminate material sufficiently thin and pliable so as to be deformable by the inner member.

Abstract: A lightweight hose assembly of the type adapted for carrying fuels and other corrosive fluids. The assembly (10, 110, 210) includes a tubular member (11, 111, 211) and coupling members (20). The tubular member (11, 111, 211) includes an inner liner (12, 112, 212) of a fluorocarbon polymer. The assembly (10, 110, 210) further includes an outer layer (14, 114, 214) of closed cell fluorocarbon polymer foam. A conductive strip (16, 116, 216) is formed on the inner liner (12, 112, 212) for dissipating electrical charges accumulated in the inner liner (12, 112, 212). A fabric braided layer (118, 218) may be disposed about the exterior of the inner liner (112) or the outer foam layer (214) respectively for adding strength to the assembly (10).

Abstract: A multi-layer tube comprises a metal tube having an outer surface and a zinc layer bonded to the metal tube outer surface, wherein the zinc layer is selected from the group consisting of zinc plating, zinc nickel alloys, zinc cobalt alloys, zinc aluminum alloys, and mixtures thereof. A surface treatment layer is bonded to the zinc layer, wherein the surface treatment layer is selected from the group consisting of a zinc/aluminum/rare earth alloy, phosphate, chromate and mixtures thereof. A first polymeric layer is bonded to the surface treatment layer, wherein the first polymeric layer is selected from the group consisting of a thermoplastic elastomer, an ionomer, a nylon, a fluoropolymer, and mixtures thereof. A second polymeric layer is bonded to the first polymeric layer, wherein the second polymeric layer is selected from the group consisting of a nylon, a thermoplastic elastomer, a fluoropolymer, and mixtures thereof.

Abstract: A pipe and method of manufacture of the pipe are described. The pipe comprises a core of helically wound steel strip embedded in a plastics material matrix and lined with inner and outer linings of filament wound fiber reinforced plastics material.

Abstract: A pressure-resistant helical corrugated pipe comprises a helical corrugated pipe wall formed by a top portion, opposite side wall portions and a bottom portion; and a continuous thin metal belt plate disposed at least in the top portion or the bottom portion and also in part or the whole of the opposite side wall portions. The metal belt plate serves as a constitent element for the pipe wall. A portion of the metal belt plate disposed at the top portion or the bottom portion has one or more reinforcement ribs and a connective portion for the metal belt plate is integrally formed of a synthetic resin material or rubber material.

Abstract: An oil well pipe for a casing, comprising an oil well body, a sliding layer formed on an outside surface of the oil well body and a protective layer formed on an outside surface of the sliding layer, the sliding layer contains an ethylene-vinyl acetate copolymer having 5 to 60 weight % vinyl acetate. The sliding layer may also contain a maleic acid modified polyethylene or the ethylene-vinyl acetate copolymer may be a maleic acid modified ethylene-vinyl acetate copolymer.

Abstract: Multilayered tubing which exhibits one or more desirable characteristics of polyvinyl chloride (PVC) tubings, such as clarity, flexibility and toughness, but without the environmental and health hazards associated with PVC materials, is provided. Also provided is a method of preparing such tubing.

Abstract: A conduit assembly which has an inner sleeve and outer sleeve which are proportioned to be concentrically mounted, each of which has a longitudinal slot of approximately the same width is disclosed. The conduits are circular, and a detent is provided on the larger of the conduits to accept and nestingly receive the slot of the smaller conduit when the same is rotated to form a complete circular encasement of the wires or cables which are passed through the conduits. The method of the invention contemplates the steps of forming a hole through a wall, such as a firewall, thereafter, optionally, passing the wires through, or passing the inner and outer sleeve through, and then once the wires are in place, or in anticipation of the wires being inserted, rotating the inner sleeve within the outer sleeve until the sleeve slots are approximately diametrically opposed and the central sleeve slop is secured in the detent.

Abstract: A rigid end socket for flexible tubing is made by folding an axial length portion of a flexible resilient elastomeric tubing around a rigid metal collar having a substantial axial length. The collar is thus embedded in the end of the tubing to provide a rigid end socket that is capable of receiving an end plug or a coupling device. The end plug or coupling device may be tightly seated in the socket by inserting it therein and by using axial pressure to radially expand the body portion within the collar.

Abstract: A pipe stopper capable of moving along a pipe to block the pipe at a point remote from an access point. The pipe stopper comprises an elongate resilient body member provided with a resilient reinforcing member. A plurality of circumferential sealing members are spaced along the length of the body member and seals the pipe stopper to the pipe. A guide member extends from the front or leading end of the pipe stopper and guides the pipe stopper around a bend and/or elbow in the pipe. The pipe stopper may be part of a pipe stopper system for placing the pipe stopper at a point remote from an access point and for subsequently retrieving the pipe stopper.

Abstract: Fluid flow through a conduit is selectively blocked upon the occurrence of an alarm condition by an inflatable member normally folded when not in use to occupy as small a volume as is practicable. The small size volume together with securement of the inflatable member in a preferred location minimizes the effect of the inflatable member to normal fluid flow. A thin, tear-away sleeve maintains the inflatable member in the folded state and quickly tears apart during inflation enabling the inflatable member to fill and plug the interior of the conduit. The shape of the inflatable member, together with the fluid source utilized for inflation assures rapid, liquid-tight sealing. Alarm signal monitoring and inflation initiation is guaranteed under substantially all conditions through the employment of an electronic controller with a stand-by battery.

Abstract: A multi-layer metal tube consists of a flat steel band having a soldering layer connected to at least one side of the steel band. The soldering layer consists of a copper alloy having a melting point below 1020.degree.. The tube is produced by deforming the flat steel band into a tubular shape by winding or cylindrically rolling and by subsequently soldering the steel band to form the multi-layer metal tube. The soldering step prevents leaks as well as corrosion. In the corresponding method for manufacturing the multi-layer tubes the steel band in a first step is electrolytically degreased and activated in a nickel flash bath or in a copper pickling bath. Subsequently, the steel band is coated with the copper alloy which contains tin, zinc, or silver in order to reduce the melting point. After completion of the winding step or rolling step, the multi-layer tube can be coated with an additional corrosion-preventing layer.

Abstract: A dual containment pipe system suitable for installation into an existing conduit includes an impervious containment pipe adapted to be installed as a primary containment pipe and a crush-resistant and flexible spacer element disposed about the entire external circumference of the primary containment pipe. The spacer is formed of a plurality of spaced apart and parallel substantially crush-resistant longitudinal members with a plurality of spaced apart parallel flexible connecting ribs bonded thereto. The longitudinal members form a uniform space when the containment pipe suitable for installation of leak detection systems including cables or based on measuring pressure differentials. The new impervious primary containment pipe may be cured in place, folded and formed, diameter reduced pipe, or any other pipe suitable for pipeline rehabilitation.

Abstract: A water reservoir is provided for a refrigerator. The reservoir is formed as an elongated tubular member bent into a single U-shape with the tubular member having a constant cross section along its length and a constant vertical rise along its length from an inlet to an outlet. The two legs angle upwardly at a common slope and the legs are substantially the same length so that the inlet and outlet are adjacent to one another. The reservoir thus forms a compact shape which fits into a previously unused space behind a crisper drawer within the refrigerator compartment.

Abstract: Welded steel pipe having wear resistance properties, corrosion resistance and low-temperature toughness is provided by preparing welded steel pipe formed of composite steel material comprised of an outer layer of high-carbon, low-alloy steel and an inner layer having a relatively low carbon content, heating the pipe to a temperature that is not less than 800.degree. C. and not more than 900.degree. C. and then quenching the pipe so as to harden just the high-carbon outer layer, and if necessary this can be followed by reheating at a temperature of not less than 200.degree. C. and not more than 600.degree. C. to thereby produce a pipe with an inner layer having high corrosion resistance and low temperature toughness and an outer layer having high hardness.

Abstract: An apparatus and method for protecting a pipe from damage due to excessive internal pressure, such as the pressures resulting from water freezing within the pipe. A compressible core apparatus is disclosed for placement within the pipe. Methods for placing the core in the pipe, connecting core sections together, and attaching the core to the pipe are disclosed. The invention is suitable for simple application to complex pipeline systems.

Abstract: A method for repairing flow conduits, such as pipe lines, wherein the inner surface of a conduit is provided with a flexible material, including a curing agent as well as a reinforcement layer, and the curing agent is hardened, the reinforcement layer comprising a knitted fabric, wherein the knitted fabric comprises reinforcement filaments which are separate from a fabric-forming yarn and extend inside the knitted fabric substantially in a single direction.

Abstract: Stiffener comprising an elastic member made of elastomer which surrounds a elongate body to be stiffened, the elastic member being integrally attached to one end of a housing support.It comprises, inside the elastic material (4), a reinforcement (8) extending over a portion of the length of the elastic member (4) from the end, the reinforcement being integrally attached by fastening (7) to the housing support (2, 6).