Abstract:
A reinforced flexible pipe having a tubular core member and a plurality of reinforcing tape members wrapped on the core member; the innermost tape member includes a plurality of openings that communicate with the external surface of the core member; and a polymer material embedded in the openings in the tape such that the polymer material contacts the core member and the tape to improve the hoop strength and the collapse resistance of the pipe. The polymer layer may also be bonded to the outer reinforcing tape to provide abrasion resistance to the reinforced flexible pipe.
Abstract:
An apparatus and method for coating pipelines with a hot melt adhesive coating and a tape. The coating may comprise a copolymer of an alkyl substituted hydrocarbon polymer in combination with a diene polymer and the tape to overly the coating may comprise a polymeric backing. Furthermore, the tape may also include a pressure sensitive adhesive.
Abstract:
A cellular reservoir flexible pressure vessel is formed as a series of closely packed tubes fitted into a pair of opposing end caps. The end caps have individual receptacles sized and shaped to receive the tube ends that are secured with adhesive or radio frequency welding. At least one end cap has a passageway for connection of the vessel. The flexible pressure vessel has a pressure relief device comprising a reduction in thickness of one end cap at a predetermined location. When subjected to overpressure it fails at the predetermined location. Other pressure relief devices include: a projecting member on the vessel surface, a weakened section of the passageway, a weakening or an absence of braiding material or hoop winding at a predetermined location on the vessel surface or along the passageway, a weakening or spreading of fibers in either the reinforcing panels or the flexible blankets covering the vessel.
Abstract:
The invention relates to a method and device for producing a reinforced socket on an extruded plastic tube made of thermoplastic material, preferably on a corrugated tube. According to the invention, the ends of the tube are provided with sockets located at predetermined section lengths. One end of the plastic tube or a section thereof is slid onto a supporting mandrel and, together with the supporting mandrel, is rotated about its longitudinal axis. During rotation, a plastic layer is extruded onto a pre-shaped socket area of the tube and/or onto the supporting mandrel whereby forming a reinforced socket that is shaped onto the tube.
Abstract:
Die vorliegende Erfindung betrifft ein Verfahren sowie eine Vorrichtung zum Herstellen einer verstärkten Muffe an einem extrudierten Kunststoffrohr aus thermoplastischem Kunststoff, vorzugsweise aus einem Wellrohr, bei dem das Rohr in vorbestimmten Abschnittlängen mit endseitigen Muffen versehen wird. Das Kunststoffrohr bzw. ein Abschnitt hiervon wird mit einem Ende auf einen Stützdorn aufgeschoben und zusammen mit dem Stützdorn um seine Längsachse gedreht. Während der Drehung wird auf einen vorgeformten Muffenbereich des Rohres und/oder auf den Stützdorn eine Kunststoffschicht aufextrudiert, die eine verstärkte, an das Rohr angeformte Muffe bildet.
Abstract:
A method is disclosed for reinforcement of thin wall hollow thermoplastic storage vessels with one or more wraps of continuous fibers. This method requires thermal bonding between the reinforcement fibers (14, 16) and the outer surface of the thermoplastic storage vessel (12) while the interior cavity of the storage vessel (12) is being pressurized (24) and heat is applied (22).
Abstract:
A composite high-pressure tube, comprising an inner layer tube formed of a synthetic resin and a reinforcement layer formed by spirally winding extended polyolefin resin sheets on the outer peripheral surface of the inner layer tube, wherein the synthetic resin or heat-sealing resin forming the inner layer tube is filled into a clearance formed between the extended polyolefin resin sheets, whereby the intrusion of water from a tube cut face can be prevented; a method of manufacturing the composite high-pressure tube, comprising the steps of manufacturing the inner layer tube formed of the synthetic resin, spirally winding the extended polyolefin resin sheets on the outer peripheral surface of the inner layer tube, filling the synthetic resin forming the inner layer tube in molten state into a clearance formed between the extended polyolefin resin sheets by a shrinkage stress produced in the extended polyolefin resin sheets by heating the resin sheets in wound state, and fusing the extended polyolefin resin sheets with the inner layer tube.
Abstract:
A process of fabricating a composite vessel includes the steps of: A) fabricating a thermoplastic liner for the vessel; B) overlaying a layer comprising fiber and a thermoplastic material (preferably by winding commingled filaments, rovings or yarns) onto the thermoplastic liner to obtain a composite intermediate structure (the fiber and thermoplastic material can be heated if desired during the overlaying, e.g. winding, step); C) heating the composite intermediate structure in a mold while applying at least one force thereto tending to urge the composite intermediate structure against and into shape of the interior walls of the mold; D) continuing step C) until the thermoplastic liner and the overlaid layer consolidate to form a composite vessel; E) cooling the mold and composite vessel until the composite vessel is solidified; and F) removing the formed composite vessel from the mold. The at least one force applied during step C) may be obtained by introducing gas pressure into the interior of the composite intermediate structure. Suitable materials for the thermoplastic material include: polyethylene, polypropylene, polybutylene terephthalate and polyethylene terephthalate. The resulting composite vessel exhibits superior mechanical and aesthetic properties.
Abstract:
Methods of reinforcing wooden supports, apparatuses for use in reinforcing wooden supports, and reinforced wooden supports are described. In a preferred implementation, the wooden support comprises a utility pole which is processed to provide a substantially, if not completely encapsulated and protected utility pole. In one aspect, the utility pole is encapsulated with a single layer of reinforcing fabric material which is provided over a substantial portion of an outer surface of the utility pole. In one implementation, the single layer is defined by an integral expanse of material which is spiral-wrapped over the body of the pole. In another implementation, the single layer is defined by a plurality of discrete units or sub-units of material which are provided over the body of the pole. In accordance with another aspect of the invention, mechanized or automated systems are provided to implement and provide the reinforced wooden supports. In one implementation, a rotation device receives the wooden support and effects a desired degree of rotation while the fabric reinforcing material is applied thereover. In one aspect, the fabric reinforcing material is spiral-wrapped by a reinforcing fabric holding device. In another aspect, the reinforcing fabric holding device enables discrete units or sub-units of material to be applied over the wooden support.
Abstract:
Method for producing pressure containers for fluids, e.g. propane or butane, comprising the steps of: making a rotational symmetric and fluid tight inner liner (1) of a plastic material, preferably with injection moulding, blow moulding or rotational moulding, with providing of a central opening (20) at one end (the top) of the liner; and winding of the liner with a fibre reinforcement (2) provided with an adhesive and thereafter hardened. A support element is provided, during or after the production of the inner liner (1), in the other end of the liner opposite the first end and axially corresponding to the central opening, said support element (9) including an axially provided centring organ (9A). The liner (1) is mounted for rotation in relation to its axis by cooperation with the central opening (20) and centring organ, a rotation tip or piercer (11, 13) being brought into cooperation with the centring organ (9A), and the mounted liner is rotated for the winding of the fibre reinforcement.