摘要:
A plug-in coupling for cryogenic lines is described, having at least two pipes (3, 4, 9, 10) fitted one inside the other like a male/female connection while forming an annular gap (16), in which plug-in coupling the pipes (3, 4, 9, 10) are releasably connected to one another by a flange connection (5, 11) located at their “warm” end, the annular gap (16) between the two pipes (4, 9) is sealed at the “cold” end by an annular seal (7) and at the “warm” end by an annular seal (5d) located in the region of the flange connection (5, 11), and the annular gap (16) is connected to a safety valve (13) in the region of the flange connection (5, 11).
摘要:
A pipe for underwater transportation of fluid is indicated which includes a pressure-tight metal inner pipe for conducting the fluid, wherein for its stabilization in radial direction at least one profiled metal strand and for stabilizing in the axial direction at least one tension-proof strand are wound around the inner pipe. The inner pipe (1) is a metal pipe which is undulated transversely of its longitudinal direction and which for stabilization in the radial direction is surrounded by at least one first radial reinforcement (3) which is composed of a profiled helically extending profile strip whose windings are placed closely next to each other or engage each other and are hooked together. Arranged around the first radial reinforcement (3) is arranged a metal pipe undulated transversely of its longitudinal direction as the outer pipe (5); at least two layers of tension-proof strands (7, 8) are wound around the outer pipe (5), preferably with oppositely directed pitch.
摘要:
A flexible conduit pipe for transporting fluids is specified, which consists of two corrugated metallic tubes, an inner tube (1) and an outer tube (2), which are arranged concentrically to one another and are separated from one another by an encircling annular space in which a spacing means is arranged. The spacing means consists of a plurality of rings (4,5) which bear with a basic body (6) against inner tube (1) and outer tube (2) and are arranged at an axial distance from one another in the annular space (3). The rings (4,5) have on their inner circumferential surface a rib (7) which extends in the circumferential direction, corresponds to the corrugation of the inner tube (1) and engages in a respective corrugation trough of the inner tube (1). At least three projections (8) are provided at least on one part of the rings (4) on their basic body (6), which projections (8) are offset from one another in the circumferential direction, protrude radially outwards and engage in the corrugation of the outer tube (2).
摘要:
A method for determining the wall thickness of a metal tube is described. This method has the following features: (a) preparation of a metal tube of a determined length; (b) arrangement of two clamp contacts on the metal tube with an exactly defined distance of separation; (c) connection of the ends of the metal tube with a power source; and (d) measurement of the voltage drop in the metal tube between the clamp contacts.
摘要:
An arrangement is provided for a helically undulated pipe made of metal, which has an end face extending along a turn of the thread of its undulation and a connecting element to be fastened to the pipe. The connecting element includes a pipe piece which has a helically extending inner surface corresponding to the turn of the thread of the undulation of the pipe. The pipe piece is mounted on the pipe in the undulation of the pipe. A metal ring is arranged on the pipe piece, where the pipe piece has sections with different inner diameters arranged one behind the other in the axial direction.
摘要:
A plug-in coupling for cryogenic lines is described, having at least two pipes (3, 4, 9, 10) fitted one inside the other like a male/female connection while forming an annular gap (16), in which plug-in coupling the pipes (3, 4, 9, 10) are releasably connected to one another by a flange connection (5, 11) located at their “warm” end, the annular gap (16) between the two pipes (4, 9) is sealed at the “cold” end by an annular seal (7) and at the “warm” end by an annular seal (5d) located in the region of the flange connection (5, 11), and the annular gap (16) is connected to a safety valve (13) in the region of the flange connection (5, 11).
摘要:
A process for the continuous production of longitudinally welded metal tubes where a metal strip (1) is drawn from a strip supply and gradually shaped into a slit tube in a shaping station (2). The slit tube is welded in a welding system (4) along the edges of the strip, and the welded tube (6) is extracted by an extraction device (5). The welding system (4) is a protective gas arc welding system with several electrodes supplied by separate sources (4c, 4d) of welding current. The electrodes are arranged in succession, in the direction of production. The welding system (4) has two welding devices (4a, 4b), whose electrode tips are directed at a common welding point. Only one of the welding devices (4a, 4b) is in operation at any given time, while the other welding device is in a standby position. When an electrode change becomes necessary, the arc of the welding device in the standby position is first struck by means of an auxiliary arc. The welding current intensity of the welding device presently in operation is then reduced, while the welding current intensity of the welding device in the standby position is simultaneously increased.
摘要:
In a process for continuous production of longitudinally welded metal tubing, in which a metal strip is withdrawn from a strip supply, gradually shaped into a tubing with an open longitudinal slit, and the longitudinal slit is sealed by soldering or welding, a lubricant is introduced into the open slit tubing before sealing.
摘要:
A system is provided having a superconductive cable (KA) which consists of a superconductive inner conductor (1), a screen arranged concentrically therewith and a dielectric applied (3) between the inner conductor and the screen. The screen (S) is constructed from a superconductive part (4) and a part (5) consisting of an electrically highly conductive material enclosing the latter, and in which the screen is enclosed with the inclusion of an intermediate space (9), used for feeding a liquid refrigerant through, by a cryostat (KR) which consists of two stainless steel tubes (6, 7) extending concentrically with one another and separated from one another by an intermediate space (8). In order to protect against abrasion of metallic parts, the surface of the screen (S) of the cable (KA), which is enclosed by the cryostat (KR), and/or of the cryostat (KR) is provided all around on its inner surface with a liner layer (10) made of an abrasion-resistant material with a lower friction coefficient compared with steel, which, when it encloses the screen (S) of the cable (KA), is permeable for the refrigerant.
摘要:
A coupling arrangement has a coupling body and a helically shaped undulated metal pipe which has an end face extending along a screw thread of its undulation. A metal holding ring is mounted on the connecting part resting against the latter, where the outer diameter of the holding ring corresponds approximately to the outer diameter of the pipe, where the end face of the holding ring facing the pipe extends along a screw thread corresponding to the screw thread of the pipe, and where the holding ring is connected in the mounted position, fixedly to the connecting part by resting fixedly and tightly against the end face of the pipe.