Abstract: An insulated ductwork system particularly adapted for exterior use joins together pre-assembled air circulation duct sections that each have a ductwork passageway that is formed solely with insulation panels of foam insulation material disposed between foil sheets that are in turn covered by additional insulation material and an outer protective jacket to seal the ductwork from weather effects. The air circulation duct sections are used without traditional metal ductwork forming any part of the air circulation duct. Receiving flanges extend from the ends of each air circulation duct section and the duct sections are joined together in abutting relation with at least one slidably engageable sleeve that engages the flanges. A filler insulation is disposed over the sleeve. A closure band is disposed over the filler insulation and joined to exterior surfaces of the air circulation duct sections.

Abstract: A pulsation control device is constructed at least partially of a composite carbon (and/or other fibers)/epoxy exostructure having an oblong cylindrical or spheroidal shape, optionally with metallic portions or reinforcements, together with a non-metallic polymer non-load sharing liner. A pressure drop tube preferably extends from an opening through an exterior wall of the body into an interior space within the body.

Abstract: A reinforced liner and methods of manufacturing the liner are disclosed. The liner includes a glass veil layer as an innermost layer in combination with an outer reinforcing layer that includes glass fibers. The glass veil layer and the reinforcing layer are joined together, such as by an elastic yarn. Inclusion of the glass veil layer imparts desirable surface finish characteristics to the reinforced liner.

Abstract: An air hose delivery assembly includes an external conduit. The air hose delivery assembly also includes a continuous inner liner disposed within the external conduit. The continuous inner liner is secured to the external conduit only at the ends of the continuous inner liner to form a tubular structure that is configured to be collapsed to a flat structure.

Abstract: A hydraulic accumulator includes a shell, a bellows, and a self-seal stay disposed at a hydraulic-fluid inlet and including a cylindrical body portion open to a hydraulic chamber and a lid-shaped head portion defining a through hole. The self-seal stay includes a first weakened portion for deforming the body portion when a pressure of the gas chamber is more than a given threshold. The first weakened portion includes a first recessed portion formed in a circumferential direction of the body portion. The first recessed portion includes a bottom surface of a plane surface or a circular arc shaped curved surface which is convex toward outside of the body portion from inside thereof. At least one of both end portions of the bottom surface in the circumferential direction is joined with an outer circumferential surface of the body portion.

Abstract: A pipe section, such as a pipe elbow, coated with a ceramic coating containing a fusible link displaced within. The link includes two exposed testing leads which are connected to a sensor which sends a signal across the link. Over time, the pipe section and the coating are worn away by material flowing through the pipe. Eventually the fusible link is severed due to the wear, signaling the sensor to send an alert, notifying that the pipe section needs to be replaced. The method of manufacture includes coating a standard pipe section with a ceramic coating, displacing a fusible link therein, and curing the coating. The coating may contain any number of fusible links in any conceivable arrangement.

Abstract: A pipe joint has a tube for fluid detachably fitted thereto, and is connected to a hydraulic device such as a cylinder. The pipe joint is provided with a resin body into which the tube for fluid is inserted, and a metal body which can rotate relative to the resin body. The resin body comprises orifices which each have a different opening diameter, and, as a result of the rotation of the resin body relative to the metal body, the orifices can be disposed in a connection part providing a connection path between the tube for fluid and the hydraulic device.

Abstract: The present invention relates to a hose for collecting rain water or draining water, and a telescopic hose is described. The pipe wall of the telescopic hose is formed by a plurality of wrinkling parts coiled in a stretching direction of the telescopic hose. The telescopic hose has the advantages as follows: the problem that the hose is difficult to be kept in a folded or extended state is solved; the telescopic hose not only can be extended or contracted relatively conveniently, but also can keep the shape in either folded or extended state, so that the underground wiring design can be facilitated. Meanwhile, the telescopic hose is not influenced by the aging of a material, and has a relatively good application value.

Abstract: A method and apparatus for insulating a fluid line in a container configured to contain a fluid. The apparatus comprises a container, a fluid line in the container, and a tube. The container is configured to contain a fluid. The tube is placed around the fluid line in the container to form a channel around a first portion of the fluid line. The tube is configured to contain the fluid from the container in the channel and to prevent a first flow of the fluid between the container and the channel except through a number of ends of the tube. The tube is further configured to reduce a second flow of the fluid within the channel such that the fluid in the channel insulates the fluid line.

Abstract: A tool is provided for closing and sealing the open end of a pipe in connection with hydraulic pressure testing. The tool is inserted into the pipe lumen and can be operated from outside. It comprises inner and outer, opposed circumferential clamps; a front plate braced against the pipe end face; a movable back plate internal of the pipe lumen; and an O-ring, carried by the back plate, which can be squeezed by pressing the back plate against the inner clamp. Ports extend through the back plate to the upper and lower ends of its peripheral surface, for bottom filling and top venting of the pipe lumen.

Abstract: A gripper for a test or isolation plug is provided. The gripper includes at least one gripper segment having a pipe or tube confronting surface with a plurality of separate rows of gripper teeth longitudinally-spaced apart on the surface. Each of the separate rows of gripper teeth comprising an alternating array of individual tips and gaps such that each row is serrated along its length.

Abstract: A mask system and an air delivery conduit (200) for use in the treatment of respiratory disorders. The air delivery conduit (200) may comprise a textile (220) having an airtight arrangement. A support structure (240) may be provided to the conduit to provide form.

Abstract: A flexible tubular member includes a flexible tubular polymeric substrate, and a coating disposed on an outer surface of the tubular substrate. The coating includes a base layer disposed on an outer surface of the tubular substrate, and a topcoat layer disposed over the base layer. The base layer includes a radiation cured cross-linked acrylate polymer. The topcoat layer includes a radiation cured cross-linked polymer.

Abstract: An elongate element (300) for a flexible pipe body (100) and method of producing the same are disclosed. The method includes inserting a first fiber element (304) in a crush resistant elongate tube element (302), wherein the first fiber element is suitable for monitoring at least one of strain, temperature and acoustic properties; inserting a further fiber element (306) in the tube element, wherein the further fiber element is suitable for curing a matrix material (308); and inserting a matrix material into the tube element to fill at least a length of the tube element such that the first and further fibers elements within that length are surrounded by matrix material.

Abstract: A flow conditioning device for incrementally stepping down pressure within a piping system is presented. The invention includes an outer annular housing, a center element, and at least one intermediate annular element. The outer annular housing includes an inlet end attachable to an inlet pipe and an outlet end attachable to an outlet pipe. The outer annular housing and the intermediate annular element(s) are concentrically disposed about the center element. The intermediate annular element(s) separates an axial flow within the outer annular housing into at least two axial flow paths. Each axial flow path includes at least two annular extensions that alternately and locally direct the axial flow radially outward and inward or radially inward and outward thereby inducing a pressure loss or a pressure gradient within the axial flow. The pressure within the axial flow paths is lower than the pressure at the inlet end and greater than the vapor pressure for the axial flow.

Abstract: Tubes for use in ultrahigh pressure devices, and associated systems and methods of manufacture are disclosed herein. In one embodiment, a metal tube includes an elongate bore having a circular transverse cross-sectional shape. The metal tube also includes an elongate wall extending around the bore and having an annular transverse cross-sectional shape with an inner surface closest to the bore, an outer surface furthest from the bore, and a wall thickness extending from the inner surface to the outer surface. An inner portion of the wall is under swage-autofrettage-induced overall compressive stress.

Abstract: A strip wound hose is provided including a metal band with an approximately S-shaped profile, which is wound in helical windings to form a hose. The profile of the metal band includes two wall sections extending essentially axially and being radially spaced part from each other, which are connected to each other by a web and are each provided at the edge with a bent rim. The profiles of two adjacent windings each are mutually engaged via their rims such that they are axially movable in reference to each other between a compressed position and an extended position. Both the web as well as the rims of the profile are aligned diagonally by an angle of at least 10 degrees in reference to the radial direction. A method for cutting to length and/or widening the strip wound hose is also provided.

Abstract: The invention relates to a device (20) for adjusting a rate of flow of air flowing along an air duct, comprising: a tubular body (22) extending along an axis (24); at least one flap (28) able to pivot about an axis transverse to the axis (24) of the body (22); a ring (34) mounted to pivot on an end portion (22b) of the body (22) about the axis (24) of this body; each flap (28) being provided with a male drive means and the ring (34) being provided with a female drive means, or vice versa, the male drive means and the female drive means being arranged in such a way that, in response to the ring (34) being pivoted about the body (22), the male drive means engages with the female drive means to alter the position of each flap (28) and hence the cross section available for the passage of air.

Abstract: Plastic tubing including a thermoplastic ribbon helically wrapped and heat bonded to itself to form a tubing wall and a thermoplastic reinforcement located helically around and along the tubing wall. At least a thickness of the tubing wall or a size of the thermoplastic reinforcement is varied along the tubing wall.

Abstract: Provided is a pipe having a heat-resistant and corrosion-resistant multi-layered plated layer excellent in workability. The pipe includes a multi-layered plated layer including: a ZnNi alloy plated layer that has a Ni content of 5% to 9% and a layer thickness of 3 ?m to 9 ?m and is formed as a first layer on a surface of a base steel pipe; another ZnNi alloy plated layer that has a Ni content of 10% to 15% and a layer thickness of 1 ?m to 3 ?m and is deposited as a second layer on the ZnNi alloy plated layer formed as the first layer; and a chromate film that is formed on the ZnNi alloy plated layer formed as the second layer.