A line element includes an inner element, an outer element surrounding the inner element, and a damping element arranged between the inner element and the outer element. The damping element can be made, for example, of knitted wire fabric or a stripwound hose. The damping element can be made in particular of a more easily wearing material than the outer element and/or the inner element, for example of copper.

A method of fabricating a conduit comprises steps of attaching a first tubular-outboard-ply end of a tubular outboard ply to a first inner collar portion of a first collar with a third weld and attaching a second tubular-outboard-ply end to a second inner collar portion of a second collar with a fifth weld. The method additionally comprises steps of interconnecting the first inner collar portion and a first outer collar portion of the first collar with a first weld and interconnecting the second inner collar portion and a second outer collar portion of the second collar with a sixth weld. The method also comprises attaching a trimmed first corrugated-inboard-ply end to the first outer collar portion with a second weld, attaching a trimmed second corrugated-inboard-ply end to the second outer collar portion with a fourth weld, and communicatively coupling a first sensor with an interstitial space.

The invention relates to a thermoplastic elastomeric bellow duct (10) having a corrugated duct segment (12) interposed between two elbowed segments (14, 18), wherein at least one of the elbowed segments (18) is made of thermoplastic elastomeric and connected to an end section (22) of the corrugated duct segment (12) by overmolding the elbowed segment (18) over the end section (22) of the corrugated duct segment (12), and wherein the end section (22) of the corrugated duct segment (12) includes a guiding and sealing arrangement (50) pointing away from the corrugated duct segment (12) in a radial direction (32). The invention further relates to an air duct (80) having such a thermoplastic elastomeric bellow duct (10).

A pipeline including at least first and second portions, each comprising outer and inner pipes, at least one coupling system connecting the first and second portions and including at least a downstream flange ring connected to at least one of the outer and inner pipes of the first portion, at least an upstream flange ring connected to at least one of the outer and inner pipes of the second portion, connecting elements connecting the upstream and downstream flange rings, first and second annular seals interposed between the upstream and downstream flange rings and configured to delimit, with the upstream and downstream flange rings, a buffer space containing an atmosphere, the pipeline comprising at least one leak detection system configured to determine at least one characteristic of the atmosphere of the buffer space.

The hyperboloid (or concave) exhaust bellows includes a plurality of convolutions of varying heights arranged in a hyperboloid (or concave) configuration. The hyperboloid bellows has increased strength and resiliency in high stress environments due to the hyperboloid configuration of the convolutions. The hyperboloid bellows allows for increased lateral movement in the same axial space or envelope compared to the prior art. The hyperboloid bellows having the hyperboloid shaped expansion joint produces an excessive amount of lateral motion using a single ply to multi-plies metal expansion joint bellows.

A length compensator for pipelines, preferably plastic pipelines, containing two connecting components, preferably made from plastic, a compensating element made from an elastic material, preferably a thermoplastic elastomer (TPE), and a supporting pipe, wherein the compensating element is arranged between the two connecting components and the compensating element ends are connected to the connecting components, wherein the outer lateral surface of the compensating element is suitably encompassed by the inner lateral surface of the supporting pipe around its entire circumference, wherein the supporting pipe has a circular cross-sectional area and the compensating element expands and contracts exclusively in the axial direction.

A connecting device (1) for a line system for passing through charged particles, the connecting device (1) having first and second flanges (2, 4) and a bellows (6). The first flange (2) and the second flange (4) are connected to each other with the interposition of the bellows (6), and the first flange (2) and the second flange (4) are movable relative to one another to compensate for displacements in the line system in a longitudinal direction (7) and in at least one transverse direction (8) angled relative thereto. A line element (10) is arranged inside the bellows (6) and connects the flanges (2, 4) electrically conductively to one another. The line element (10) is movably mounted in or on both connection elements (13, 14) of the two flanges (2, 4), and/or the line element (10) has at least one annular spring (15) or at least one helical spring (16).

A method for fluidically connecting functional modules that are temperature-controlled by a fluid, preferably battery modules, including a) providing the functional modules with at least one line port for directing the fluid in and/or out, at least two functional modules being arranged at a mutual spacing so the line ports are substantially exactly opposite each other and aligned along a first axis and open into a region between the modules, c) incorporating a preassembled connection assembly in the region, the connection assembly having fluid line(s) for feeding and/or discharging the fluid, and at least two fluidic connector pieces which branch off from the fluid line(s) such that the connector pieces are aligned with the line ports along the first axis, and d) modifying a spacing between the connector pieces and/or a length thereof along the first axis such that the connector pieces each fluidically contact one of the line ports.

A process for manufacturing a bellows, made of austenitic high-grade steel with high compressive strength and fatigue strength, forms a single-layer or multilayer sleeve into a bellows with hydraulic forming. The pressure resistance and fatigue strength are improved by the bellows being cleaned after the forming and by the bellows being exposed to a surrounding area containing carbon and/or nitrogen atoms at temperatures between 100° C. and 400° C., preferably 200° C. to 320° C. With this a hardening of the bellows takes place by means of the diffusing in of carbon and/or nitrogen atoms. A bellows made of austenitic high-grade steel with one or more layers created in this manner has the edge layer hardened by the incorporation of carbon and/or nitrogen atoms up to a hardening depth of at least 5% of the wall thickness.

An expansion compensator having a longitudinal axis, and having an elongate metal conduit with first and second spaced apart ends and an expansion/contraction section, an inner plastic liner positioned interior of the elongate metal conduit and having an expansion/contraction section and an interior volume extending from the first end to the second end, wherein each of the elongate metal conduit and the inner plastic liner have a stiffness along the longitudinal axis, and the stiffness of the elongate metal conduit is greater than the stiffness of the inner plastic liner.