A method of manufacturing a shrouded pipe comprising an inner pipe section for providing a primary fluid path and an outer pipe section for enclosing the inner pipe section to provide a secondary fluid path. The method includes opening the outer pipe section by separating first and second longitudinal edges which split the outer pipe section along a longitudinal line, assembling the outer pipe section with the inner pipe section by passing the inner pipe section between the separated first and second longitudinal edges, and closing the outer pipe section by bringing the first and second longitudinal edges together and joining the first and second longitudinal edges together. An advantage of this method is that close manufacturing tolerances can be achieved without a complex or difficult assembly process.

In order to obtain a heating and cooling system capable of localized cooling or heating a given area, a heating and cooling system includes: a supply section configured to supply a heating medium; and a double pipe unit including: an inner pipe, connected to the supply section, through which the heating medium flows, and an outer pipe disposed at an outer peripheral side of the inner pipe, the outer pipe including a space between the inner pipe and the outer pipe, the space being maintained at a vacuum, portions in which a degree of vacuum of the space is different, or in which the degree of vacuum of the space is adjustable.

In order to obtain a heating and cooling system capable of localized cooling or heating a given area, a heating and cooling system includes: a supply section configured to supply a heating medium; and a double pipe unit including: an inner pipe, connected to the supply section, through which the heating medium flows, and an outer pipe disposed at an outer peripheral side of the inner pipe, the outer pipe including a space between the inner pipe and the outer pipe, the space being maintained at a vacuum, portions in which a degree of vacuum of the space is different, or in which the degree of vacuum of the space is adjustable.

A integrated fluid conduit is provided having two or more internal conduits, the size and shape of the internal conduits is designed to optimize the hydraulic diameter of each conduit based on the needs of the system. The integrated fluid conduit is advantageously manufactured according to additive manufacturing techniques which enable formation of off-center and/or non-concentric internal conduits adapted to specific applications requiring turns such as the fuel delivery system or the hydraulic system of/on a gas turbine engine for an airplane.

A integrated fluid conduit is provided having two or more internal conduits, the size and shape of the internal conduits is designed to optimize the hydraulic diameter of each conduit based on the needs of the system. The integrated fluid conduit is advantageously manufactured according to additive manufacturing techniques which enable formation of off-center and/or non-concentric internal conduits adapted to specific applications requiring turns such as the fuel delivery system or the hydraulic system of/on a gas turbine engine for an airplane.

An auto-fill two-layer two-half wear resistant elbow of a concrete pump truck consists of an outer-layer protection elbow, an inner-layer heterogeneous wear resistant combined elbow and a wear resistant connecting flange. A filling space is provided between the outer-layer protection elbow and the inner-layer heterogeneous wear resistant combined elbow. The wear resistant elbow is designed as a two-layer two-half unique structure including a protection layer and a wear resistant layer, wherein the protection layer protects the wear resistant layer from distortion or even damage by external force and distortion or even damage by impact force by internal materials during the transportation, installation and use of the elbow. Upon using the wear resistant elbow for the first time, the concrete grout fills the reserved slit via the heterogenous combined elbow and enters the reserved filling space, allowing the outer-layer protection elbow and the inner-layer heterogeneous wear resistant combined elbow to be fixed as a whole, which may realize the purpose of reducing the weight of the entire elbow, reducing costs, saving materials and increasing service life.

An auto-fill two-layer two-half wear resistant elbow of a concrete pump truck consists of an outer-layer protection elbow, an inner-layer heterogeneous wear resistant combined elbow and a wear resistant connecting flange. A filling space is provided between the outer-layer protection elbow and the inner-layer heterogeneous wear resistant combined elbow. The wear resistant elbow is designed as a two-layer two-half unique structure including a protection layer and a wear resistant layer, wherein the protection layer protects the wear resistant layer from distortion or even damage by external force and distortion or even damage by impact force by internal materials during the transportation, installation and use of the elbow. Upon using the wear resistant elbow for the first time, the concrete grout fills the reserved slit via the heterogenous combined elbow and enters the reserved filling space, allowing the outer-layer protection elbow and the inner-layer heterogeneous wear resistant combined elbow to be fixed as a whole, which may realize the purpose of reducing the weight of the entire elbow, reducing costs, saving materials and increasing service life.

An assembly of a dual lumen tubing and a dual bore connector has a first flow conduit along a first lumen and a first bore, and has a second flow conduit from a second bore, via a circumferential groove and along a second lumen. The assembly can be used in connection with an extracorporeal circuit of a haemodialysis machine or an infusion set.

An assembly of a dual lumen tubing and a dual bore connector has a first flow conduit along a first lumen and a first bore, and has a second flow conduit from a second bore, via a circumferential groove and along a second lumen. The assembly can be used in connection with an extracorporeal circuit of a haemodialysis machine or an infusion set.

In various embodiments, multi-conduit assemblies 100 comprise pluralities of individual or distinct conduits 101 joined by various forms of webs 110, sleeves 176, wraps 222, 212, and/or retainers 181. Assemblies 100 are useful for fluid, electrical, communications, and other applications.