A conduit (100) for transporting a fluid comprises a first collar (102), a second collar (103), and a bellows (108). The bellows (108) comprises a corrugated inboard ply (110), a corrugated outboard ply (112), and an interstitial space (126), interposed between the corrugated inboard ply (110) and the corrugated outboard ply (112). The conduit additionally comprises a second weld (138), hermetically coupling the corrugated inboard ply (110) and a first outer collar portion (104), a third weld (134), hermetically coupling the corrugated outboard ply (112) and a first inner collar portion (106), a fourth weld (186), hermetically coupling the corrugated inboard ply (110) and a second outer collar portion (105), a fifth weld (184), hermetically coupling the corrugated outboard ply (112) and a second inner collar portion (107), and a first sensor (116), communicatively coupled with the interstitial space (126).

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 multiple component hot gas flowing conduit has an elongated, convoluted bellows, an interlock liner, frequency dampers and elastic spacers engaging the dampers and biasing the dampers into respective bellows convolution with no contact of bellows and liner for all operating states of the conduit. Assembly pretension of the interlock liner preferably flattens out the elastic spacers permitting assembly of the liner into the bellows and upon relaxation of the liner, the spacers extend radially outwardly to engage and bias the dampers into the bellows. The bellows is convoluted throughout, or may have convoluted ends with an integral smooth-wall tube therebetween. Components are isolated from abrasion against one another.

A gas seal structure includes: a first member with a first flow path where seal gas flows; a second member that is disposed to face the first member and includes a second flow path where the seal gas flowing from the first flow path flows toward a predetermined seal surface; and a communicating pipe disposed across the first and second flow paths. The communicating pipe includes: a first pipe end and a first seal member that are held within the first flow path, a second pipe end and a second seal member that are held within the second flow path, and a flexible pipe that connects the first pipe end and the second pipe end. A rigidity of the flexible pipe end is lower than a rigidity of each of the first pipe end and the second pipe end.

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.

The invention relates to an expansion joint (1) for joining two adjacent parts of a pipe. The expansion joint (1) comprises an expansion bellows (5), an expanded wall (2) and an inner sleeve assembly (8). The expanded wall (2) comprises a first wall part (3) and a second wall part (4), wherein the first wall part (3) and the second wall part (4) are spaced apart from each other axially by an axial gap. The expansion bellows (5) is connected to the first wall part (3) and to the second wall part (4) such that the axial gap between the first wall part (3) and the second wall part (4) is closed and such that the first wall part (3) and the second wall part (4) are connected flexibly. The expanded wall (2) and the inner sleeve assembly (8) limit at least one sealed chamber (9, 10) between each other, and the at least one sealed chamber (9, 10) is filled by a first gas.

An expansion joint fitting for conveying liquid includes a radially inner bellows defining a liquid-conveying passage for conveying liquid between the first and second longitudinal ends of the expansion joint fitting. A radially outer bellows is disposed radially outward from and extending around the radially inner bellows. An annular plenum is defined between the radially inner bellows and the radially outer bellows.

A sliding pipe supporting arrangement (2) adapted to receive and support at least one pipe or jacketed pipe assembly comprising main support means (9) comprising at least one opening to support a pipe. The arrangement further comprises an assembly of spring arrangement (6) and ball transfer unit (7), coupled to the main support means so as to isolate differential displacement in lateral and vertical direction of the pipe. The assembly unit comprises a top plate (3), middle plate (4) and a bottom plate (5). The spring arrangement further comprises a plurality of springs positioned in between the top plate (3) and the middle plate (4) facilitating the vertical displacement of the pipe. The ball transfer unit (4) also comprises plural rollers positioned between the bottom plate (4) and middle plate (5) facilitating lateral displacement of the pipe and an expansion joint arrangement (8) placed in between pipe lengths of a pipe to attenuate the axial displacement of the said pipe.

A device (1) for connecting fluid-conducting lines (2) and/or chambers (3) in a high-frequency electromagnetic field. The device includes two line bodies (4, 6) each having a line body inner wall (5, 7), which is rigid per se, and a bellows (8). The line body inner walls together enclose an inner cavity (9) for the passage of fluid through the device, and the line bodies are connected to one another, and enclosed with a sealing action, by the bellows and the first and second line bodies can be displaced and/or tilted relative to one another. The second line body inner wall projects a little into an interior space (10) surrounded by the first line body inner wall and ends there and the first line body inner wall is electrically conductively connected to the second line body inner wall by at least one elastically deformable sliding contact (11).

Disclosed herein is a gimbal body comprising: an end part (51) for use in welding the gimbal body to a pipe; and a main body (53) attached to the end part (51); wherein: the end part (51) is made of a first material; and the main body (53) is made of a second material that is different from the first material. Embodiments provide a new method of manufacturing a gimbal that allows the use of the most appropriate materials for high temperature and high pressure performance whilst overcoming manufacturing and installation problems experienced by known gimbals constructed with such materials.