DE2911448A1 - PIPE CONNECTION - Google Patents

Description

X 2911U8

File R 697 Q Düsseldorf, March 15, 1979 "ο * Be / Sch

Pipe connection

The invention relates to a pipe connection for pipes with flared ends, with one in the flared pipe end engaging inner ring and with a flared Pipe end engaging part of an outer ring.

In DE-OS 26 23 157 such a pipe connection is described. This pipe connection is for pipes with relative small diameter and should give the possibility of connecting fittings to the pipe. To this The purpose is an outer ring designed as a union nut provided, which is attached before flaring the pipe end and after flanging the flared end of the Rohres engages behind. Between the flared end and the outer ring part engaging behind this end is also provided with a pressure ring. A conical surface of the inner ring cooperates with the flared pipe end, while the other, provided with a different cone angle The end of the inner ring cooperates with a corresponding tapered bore of a body, on the one hand a External thread for screwing on the union nut and on the other hand a possibility to attach a Has fitting or the like.

The known pipe connection is completely rigid and has no angular mobility. Henceforth it can only be dismantled if there is no other piece of tubing connects to the connection or such a piece of pipe was removed earlier because of their design.

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Because of the large number of parts required, this known pipe connection is relatively expensive to manufacture and only suitable for small pipe diameters.

In DE-OS 26 23 36k a pipe connection is described in which a ball head and a ball socket are welded to the opposite pipe ends, which can be connected to one another by an anchoring piece that can be braced radially by means of a sleeve which is axially movable by a nut. This known pipe connection is also very expensive to manufacture and requires many individual parts that are complicated to manufacture. However, this pipe connection has a certain angular mobility and is also suitable for larger pipe diameters.

The assembly of pipes with this known pipe connection can only be carried out at the end of a pipe, since a large axial one is used to join the pipe ends together Path is required, which is only given at the end of a pipeline. Individual pipe sections can therefore only be used one after the other are progressively joined or separated.

The present invention is based on the object of creating a pipe connection which has a simple structure consists of few and robust individual parts, quick assembly of aur free. Terrain or on the bottom of water.

pipes to be laid and which can be laid and dismantled quickly and without leveling and straightening work. In order to be able to achieve this, it is necessary to be able to establish or loosen a pipe connection between adjacent pipe sections without an axial displacement of the respectively adjacent pipe being necessary. It is therefore a further object of the present invention to provide a pipe connection which allows this to be achieved.

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The pipe connection according to the invention should seal properly both under negative pressure and under overpressure and with the most varied of media, and the Pipe sections including the pipe connections, as these are usually only in use for a short time, but already in can be procured and stored in advance, stored and serviced in a space-saving manner and at low cost.

This problem is solved by the features of the main claim. Further advantageous embodiments of the invention result from the features of the following claims.

With the formation of a pipe connection according to the invention it is achieved that with a relatively low bulge » development of the pipe ends and thus also the possibility of the Stacking pipes relatively tightly is sufficient Swivel angle is achievable within the pipe connection. The angular mobility of the pipe can be both constant be given so that the tubes can easily follow smaller displacements, but it is also possible to determine an angle that has been set once. The pipe ends are shaped so that when stored and Transport with a single cover cap shape protection can be achieved. The remaining parts of the pipe connection can be screwed together without transport protection get by, as all functional surfaces are protected inside.

Due to the design of the pipe connection according to the invention, it is also possible to use longer pipes in general To relocate the site, taking into account the thermal expansion, to replace damaged pipes and subsequently Lich branches and sliders to be used.

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Without the possible lying in the pipe connection itself To need movement angle that is completely for overcoming uneven terrain and assembly inaccuracies is retained, the drilling ends can therefore be joined together and by twisting the opposite, angled pipe ends every angle between 0 ° and twice that Inclined angle of the pipe ends are mounted. In this way, pipelines can also be installed in bends with almost anything Laying radii of curvature, for example along a road, a dam, a railway line, and this if the Radii are not too small without additional components.

It is particularly advantageous to lay out a pipeline in a light zigzag line. In this case, the pipeline can compensate for differences in length and vibrations without a significant increase in the material stresses simply by shifting the couplings slightly on the ground. No additional parts are required for this and the extension of the line remains within small limits. The flow losses in the pipeline are also low due to the full pipe cross-section that is always available at the pipe connection and the rounded transitions possible there. The laying of the pipeline in a slight zigzag line also makes it possible to replace any pipe in a completely laid pipe without having to loosen more than the two connecting pipe connections. With exclusive use of the »movement angle present in every pipe connection, it is possible, after loosening the drilling connection, to pivot the pipe ends so that a one-piece inner ring that cannot be changed in length can also be removed. Furthermore, it is possible to insert other pipe parts at these points, since the distance between the pipe ends can be increased when using beat pipe ends so that branches or slides can be inserted without any problems.

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Due to the mobility of the pipe ends in the inventive Drilling connections in connection with the large adjustment option of the angular position between the individual Pieces of pipe, several construction crews can work at the same time begin laying a pipeline at different points, leaving any gaps between easily close two construction crews using elbows.

Further details and advantages of the invention emerge from the following, with reference to several in the drawing given description of the illustrated embodiments, and show it:

1 shows a partial section through a pipe connection according to a first embodiment,

2 shows a partial section through a pipe connection according to a second embodiment,

3 shows a partial section through a pipe connection according to a third embodiment,

Flg. h a partial section through a pipe connection

according to a fourth version sf ο im,

Fig. 5 is a plan view of a in the embodiment of FIGS. Used h outer ring,

Fig. 6 is a side view of an in the execution sf ο ra according to Fig. k used outer ring,

Fig. 7 is an illustration of the mounting option of pipe connection according to the invention,

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2911U8

- η.

8 shows a representation in partial section of a pipe connection according to the invention with a Possibility of eliminating angular mobility according to a first embodiment,

9 shows a partial section of an inventive

Pipe connection with device for eliminating angular mobility according to a second Embodiment,

10 shows a partial section of an inventive

Pipe connection with device for eliminating angular mobility according to a third Embodiment,

11 shows a partial section of a pipe connection according to the invention with a device for eliminating the

Angular mobility according to a fourth embodiment,

12 shows a partial section of an inventive

Pipe connection with reduced flow resistance,

13 shows a partial section of a modification of the pipe connection according to FIG. 12,

FIG. 1h a representation in section of the pipe connection according to FIG. 13 in a different angular position and FIG

FIG. 15 shows a modified embodiment of the pipe connection according to FIG. 13.

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A straight pipe piece 2 is provided with a pipe end 4 flanged on. The flared pipe end 4 has a spherical outer surface 6 and a spherical inner surface 8. The flared pipe end 4 ends in a Front edge 10. In the example shown, the center point 12 of the outer spherical surface 6 and the center point 14 of the Ball inner surface 8 not together, but lie on the pipe axis. The pipe connection between the opposite Ending flared pipe ends 4 consists of an interior ring 16 and an outer ring 24. The inner ring has an inner diameter which is the inner diameter of the straight RohrstUcks 2 corresponds. It is composed of a ball which interacts with the inner surfaces of the flared pipe ends 4 areas 22 limited in each of which a groove 18 with a Sealing ring 20 are arranged. The outer ring 24 has the flared pipe ends 4 behind engaging parts 26, the inner spherical surfaces 28 of which rest on the outer surfaces 6 of the flared pipe ends 4. The spherical surfaces are closed by a first delimitation 29, the diameter of which is greater than the outer diameter of the straight line Pipe section 2, but smaller than the diameter of the front edge 10 of the flared pipe end 4. A second limitation is formed by paragraphs 30, which one after inwardly protruding, circumferential projection 32 in the outer ring 24 form. The outer ring is divided in its transverse center plane and is held together by means of clamping screws 34. at During assembly, the inner ring 16 is first placed between the flared pipe ends 4. Then the Outer ring halves placed over the flared pipe ends 4 and clamped against one another by means of the clamping screws 34. In this embodiment, the outer ring 24 is dimensioned so that the expanded pipe ends 4 between the Inner ring 16 and the outer ring 24 are clamped so that in the assembled state there is no angular mobility.

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However, it is also possible to use the outer ring 24 with a slight play in relation to the flared pipe ends 4 to be provided so that an angular mobility of the flared pipe ends 4 up to the stop of the front edge on paragraphs 30 is possible.

This embodiment is advantageous when the No simultaneous production of the flared pipe ends 4 Upsetting should be done as in this Fall with the wall thickness of the flared pipe end 4 increasing diameter decreases.

In the exemplary embodiment according to FIG. 2, the straight pipe section 2 has a flared pipe end 36 with a spherical outer surface 38 and a spherical inner surface 40, the center points 44 of which coincide on the pipe axis. An inner ring 46 has spherical surfaces 52 which interact with the inner surfaces 40 of the flared pipe ends 36 and in which grooves 48 for sealing rings 50 are arranged. A circumferential groove runs between the opposing spherical surfaces 52. An attachment ring 56 divided in the transverse central plane is placed around the flared pipe ends 36. Its parts 58 engaging behind the flared pipe ends 36 end in a first delimitation 62 and a second delimitation 64 designed as a shoulder, which merges into a circumferential projection 66. The circumferential projection 66 engages in the groove 54 of the inner ring 46 and is supported therein. In this way a radial clamping of the outer ring 56 will he "ranges by means of the clamping screws 34 on the inner ring 46 so that it is possible a slight clearance 68 between the inner ring 46, the outer ring 56 and to keep the on beaded-piercing 36th

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In this way, even after a pipeline has been laid with the pipe connections according to the invention, a given certain angular mobility of the individual straight pipe sections 2, which leads to the advantages already mentioned leads.

In Fig. 3, a further modification of the pipe connection according to the invention is shown. In this embodiment, the straight pipe section 2 is followed by a flanged pipe end 70, with spherical outer surfaces 72 and spherical inner surfaces 7k, the centers of curvature 78, 80 of which do not coincide and are arranged so that a larger one at the front edge 76 of the flared pipe end 70 Wall thickness is present than in the area of the transition to the straight pipe section 2. This allows a groove 82 for a lip seal 84 to be provided in the pipe ends 70 which are flanged on. An inner ring 86 with spherical surfaces 90 placed between the flared pipe ends 70 is provided with a circumferential groove 88 with parallel side wall surfaces 89 . A split in its transverse central plane outer ring 92, which is held together by clamping screws 34, has the outer ring parts 94 engaging behind on flanged pipe ends 70, with spherical surfaces 96 which rest on the spherical surfaces 72 of the flared pipe ends 70. The spherical surfaces 96 end in a first delimitation 98 and a second delimitation in the form of paragraphs 100, which merge into a circumferential projection 102 . This circumferential projection 102 engages in the groove 88 of the inner ring 86, whereby a mutual centering of the inner ring 86 and the outer ring 92 is achieved. In this embodiment too, by appropriately dimensioning the outer ring 92, either the flared pipe ends 70 can be braced between the inner ring 86 and the outer ring 92, so that after tightening the clamping screws 34 there is no angular mobility of the flared pipe ends 70 to one another, or else it can be a little

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29-48

Play can be provided between the inner ring 86, the flared pipe ends 70 and the outer ring 92, so that after laying a pipeline with this embodiment a pipe connection the already mentioned angular mobility remains.

The pipe connection shown in Fig. 4 allows to overcome larger distances between individual straight pipe sections 2, which z. B. at the meeting of by Pipeline sections laid by various construction crews can be advantageous. In the example shown, the straight pipe sections 2 are provided with flared pipe ends 36 as shown in FIG. Between the flared Pipe ends 36 is an inner ring, consisting of the ineinan of the screwable inner ring parts 104, IO6 set. to this is an inner ring part 104 with a Provided external thread 110, while the other inner ring part 106 has a socket with an internal thread 108. A cylindrical extension 112 interacts with inner ring part 106 sealingly together, the inner ring part 106 to this Purposes is provided with an annular groove 114 and seal 116 inserted therein. A cover in the form of a sheet metal tube 118 protects the exposed parts of the external thread 110. In the inner ring parts 106, 104 there are blind bores 120 orderly, the hook wrench can access the to rotate both inner ring parts 104, 106 against each other. The sealing of the inner ring parts 104, 106 with respect to the flared pipe ends 36 takes place, as in FIG. 2, by in Grooves 48 inserted sealing rings 50.

Each outer ring 122 engages behind with its outer ring part 124 has a flared end 36, the opposite Outer rings 122 are axially braced against one another by means of clamping screws 128 and nuts 130.

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The outer rings 122 are also designed to be divided and have overlaps 132 in their transverse center plane, which can be connected by means of connecting screws 134.

Depending on how large the distance from opposite flared pipe ends 36 is, the inner ring parts are 106, 104 screwed into one another to different lengths and through the outer rings 122 with the flared pipe ends 36 tense. In this way, significant differences in distance can be made between opposite flared Overcome pipe ends 36 without causing assembly difficulties leads.

In Fig. 7 are straight pipe sections 2 with flared pipe ends 36 shown, with the interposition of a Manifold I36 are connected to each other. In this way it is achieved that the flared pipe end 36 a Assumes an angle with respect to the pipe axis that is smaller than 90 °. This makes it possible to create a pipeline in a zigzag or to lay in a curve. Taking into account the aforementioned angular mobility within the pipe connection As shown in FIG. 7, when the straight pipe sections 2 are pivoted, such a gap occurs of the flared pipe ends 36 that it is readily possible to place an inner ring 46 between the flared Introduce pipe ends 36 and then the pipe connection by means of an outer ring, not shown to manufacture.

The previously described options for eliminating the angular mobility in the pipe connection were based exclusively on a radial bracing of the inner ring, the flared pipe ends and the outer ring.

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In Figs. 8 to 11 further possibilities are shown, which represent a form-fitting connection to eliminate angular mobility. In Fig. 8 this is at a Execution form of the pipe connection according to FIG. 2 thereby achieved that in the space between the leading edge 42 of the expanded pipe ends 36 and the shoulders 64 in the outer ring 56 rings 138 are inserted, which just fill this space.

In Fig. 9, the same goal is achieved by a special design of an inner ring 140, which is in the area of Space between the front edge 42 and the shoulders 64 in the outer ring 56 has circumferential projections 142 which fill this space completely.

In the embodiment according to FIG. 10, the inner ring 46 is unchanged compared to the embodiment according to FIG. 2, but an outer ring 144 is provided Paragraphs 146 as opposed to one engaging in the groove 54 Projection 148 are brought forward so that they are against the front edges 42 of the flared pipe ends 36 abut.

In the embodiment shown in Fig. 11 is the Inner ring 46 also unchanged, but an outer ring 150 is provided with sleeve-like extensions 152 on both sides provided that the straight drill bits 2 over a larger Reach around the length. The outer ring 150 with the sleeve-like Extensions 152 is also in its transverse median plane divided and forms half-shells, which by means of clamping screws 34 are braced. In this way, the flared pipe ends 36 are relieved, so that it is also possible to bridge larger distances with such a pipe connection floating freely.

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The one in Pig. 12 shown embodiment allows to reduce the flow resistance in the area of the pipe connection and at the same time the required sealing surfaces to be laid in a protected location in the area of the pipe ends. For this purpose, the straight pipe section 2 is included a cylindrical widening 154 is provided, to which the flared pipe end 36 is connected. The inner ring consists of two equal parts 156 with outer spherical surfaces 160 which cooperate with the corresponding inner surfaces of the flared pipe ends 36. A can is inserted into the opposite, cylindrical widenings 154 and by means of in at the end regions of the Bushing 162 arranged grooves I66 inserted seals 168 sealed. In the central plane of the sleeve 162 is a circumferential flange 164 arranged against which the inner ring parts 156 abut with a vertical side surface 158. In this way, the sleeve 162 is opposite to the flared Tube ends 36 centered. The outer ring 24 corresponding to the embodiment according to FIG. 1 engages around in the usual way the flared pipe ends 36 and allows due to the limitations 29 and 30 a certain Angular mobility of the pipes to each other. So that the rifle 162 is not jammed or deformed, which can lead to leaks, are the end areas of the Bush 162 designed as spherical surfaces 170.

. As already explained in connection with Figure 7, the flared tube ends relative to the straight pipe 2 stucco may assume a certain angle of inclination, which - by means of an interposed KrUmmerstücks I36 achieved - as in off operation example of FIG. 7. In the exemplary embodiment according to FIGS. 13 and 14, on the other hand, flared pipe ends 174 are provided, the front edges 176 of which form an angle of less than 90 ° with the longitudinal axis of the straight pipe sections 2.

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As the pipe ends 174, as with the others Embodiments, in particular according to FIG. 12, are spherical, is thus a circular shape of the front edges guaranteed.

A cylindrical widening 172 is arranged between the straight pipe section 2 and the pipe end 174 which is flanged on and receives a two-part liner 188. The parting line 204 of the liner halves 188 is around the same Angle with respect to the longitudinal axis of the straight pipe sections 2 inclined, like the leading edge I76 of the flared pipe ends 174. In the area of the parting line 204 are to everyone Bushing part 188 flanges 190, 192 provided. The one Flange 190 is provided with a circumferential projection 194, while flange 192 has a circumferential shoulder having. The projection 194 engages in the shoulder I96 and thereby centers the bushing parts 188 with respect to one another. Sealing of the parting line 204 is achieved by a sealing ring 202 arranged in a groove 200. Each can * part 188 is against rotation with respect to the corresponding cylindrical widening 172 by a radial projection 206 secured in a corresponding recess 208 in. the cylindrical widening 172 engages. The flanges 190, 192 are made up of one of two parts 178, 180

A * t £ 4äring enclosed, which rests with side surfaces 186 on the flanges 190, 192. The inner ring part 178 is provided with a sleeve-like extension 182 with an internal thread, while the inner ring part 180 has an external thread 184 which is screwed into the sleeve-like extension 182. The outer ring 24 is the same as in the embodiments according to FIGS. 1 and Fig. .12. In this Ausführungsfο na double angular mobility is given between opposite pipe ends. Due to the gap between the front edge 176, the rolled up pipe end 174 and the shoulder 30 in the

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Outer ring 2k , the pipe ends between the inner ring parts 178, 180 and the outer ring 2k can be pivoted through a small angle. In addition, however, the opposite, flared pipe ends 174 can be rotated with respect to one another and assume any angular position with respect to one another, up to the maximum angular position shown in FIG. 1k . In this way, with the inclusion of a sleeve which reduces the flow resistance, a simple laying of a pipeline can be laid between individual pipe sections with an angle that can be adjusted as desired within predetermined limits.

In the embodiment according to FIGS. 12 and 13, the sealing of the pipe connection is achieved exclusively by seals arranged in the bushes 162 and 188, respectively. In FIG. 15, additional seals 50 are arranged in grooves k8 of an inner ring 210, 212 consisting of two parts. Furthermore, a seal 198 is provided in the screw connection of the inner ring parts 210, 212. This creates a sealed space located between the inner ring parts 210, 212 and the bushing parts 188, which is accessible from the outside via a screw nipple 214. Either a leak test can be carried out via this screw nipple 214, or a sealant can be pressed into the space.

030039/0476

File R 697

Düsseldorf, March 15, 1979 * <5 Re / Sch

List of reference symbols

2 straight pipe section 18 groove 4 flared pipe end 48 " 36 ^M. 20 seal 70 ^M. 50 ^AD 174 » 22 spherical surface 6 exterior surface 52 · 38 " 90 " 72 " 54 groove 8 inner surface 88 " 40 ^M. 89 side wall surfaces 74 " 24 outer ring 10 leading edge 56 " 42 ⁿ 92 " 176 ^M. 122 " 12 centers of curvature 144 " 14 " 150 ^AD 44 " 26 outer ring parts 78 ^M. 58 " 80 ·· 94 ·· 16 inner ring 124 ^w 46 w 28 spherical surfaces 86 " 60 " 104 · 96 " 106 " 126 " 140 · 160 " 156 29 first limitation 178 » 62 · 180 » 98 « 210 » 212 "

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30th paragraphs 166 Groove 64 Il 168 Sealing rings 100 η 170 Spherical surface 146 η 182 sleeve-like approach 32 all-round projection 184 External thread 66 Il 194 all-round projection 102 H 196 all-round paragraph 148 It 198 Sealing ring 34 Clerams rob 200 Groove 128 H 202 Sealing ring 68 game 204 Parting line 82 Groove 206 radial projection 84 poetry 208 Recess 108 Sleeve with internal thread 214 Screw nipple 110 External thread 112 cylindrical extension 114 Groove 116 poetry 118 cover 120 Drilling 130 mother 132 Overlap 134 Connecting screw 136 Elbow 138 Rings 142 Before leaps 152 sleeve-like extension 154 cylindrical expansion 172 η 158 Side face 186 Il 162 rifle 188 η 164 flange 190 η 192 η

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Claims (36)

2911U8 File E 697 Düsseldorf, March 15, 1979 Re / Sch Claims 5t. Pipe connection for pipes with flared ends, with an inner ring engaging in the flared pipe end and with a part of an outer ring engaging behind the flared pipe end, characterized in that at least one inner ring (] £, 46, 86; 104, 160; 140, 156; 178, 180; 210, 212) with two opposite, each with an inner surface (8, 40, lh) of the flared ends (4, 36, 70, 17 ^) cooperating, equal spherical or conical surfaces (20, 52, 90) is provided that the flared Pipe ends (4, 36, 70, 174) have corresponding spherical or conical inner and outer surfaces (8, 40, 74; 6, 38, 72) and that an axial connection (24, 56, 92, 144, 150, 128 ) between the outer ring parts engaging behind the opposite pipe ends (4, 36, 7O _{9 174)} (26, 58, 94, 124) is provided. 030039/0476 2911U8 2. Pipe connection according to claim 1, characterized by a one-piece inner ring (l6, 46, 86, 140). 3. Pipe connection according to claim 2, characterized by an externally circumferential, in the area groove (54, 88) arranged between the inner ring surfaces (22, 52, 90) cooperating with the pipe ends (36, 70). 4. Pipe connection according to claim 3, characterized in that the groove (88) is parallel Has side wall surfaces (89). 5. Pipe connection according to claim 3, characterized in that the groove (54) is V-shaped having converging side wall surfaces. 6. Pipe connection according to claim 1, characterized by two opposing inner rings (104, 106; 156; 178, 180; 210, 212). 7. Pipe connection according to claim 6, characterized in that the inner rings (104, 106; 178, 180; 210, 212) are designed to be screwable into one another. 8. Pipe connection according to claim 6 or 7t characterized by a seal (II6, 198) between the inner rings (104, I6O; 178, 180; 210, 212). 9. Pipe connection according to claim 7 or 8, characterized by an outer Schute cover (118) exposed threaded point (HO). 030039/0476 2911M8 10. Rotary connection according to one or more of the claims 2 to 9 »marked by so arranged in the area of the inner ring surfaces (52) cooperating with the pipe ends (36), circumferential front cracks (142) that they form stops for the leading edges (42) of the pipe ends (36). 11. Pipe connection according to claim 6, 7 or 10, g e -characterized by one in one cylindrical area (154) of the pipe ends (36) insertable, essentially cylindrical sleeve (162, 188), With a flange (164; 190, 192) running around the outside in the central area of the bushing (165, 188) and two on both sides of the flange (164; 190, 192) arranged. Inner rings (156, 178, 180). 12. Pipe connection according to claim 11, characterized by in circumferential grooves (166) on the Sealing rings (168) arranged at the ends of the bushing. 13. Pipe connection according to claim 11 or 12, characterized by a two-part design of the sleeve (188) with through the center plane of the Flange (190, 192) running partial joint (204). 14. Pipe connection according to claim 13, characterized by a circumferential groove (200) arranged in a flange half with an inserted sealing ring (202). 15. Pipe connection according to claim 13 or 14, g β k · η η -zei chnet by one opposite the Flange (190, 192) inclined at an angle of less than 90 °. 030039/0476 291U48 - 4 - 16. Pipe connection according to claim 15, characterized by mutually centering the bushing parts (188) by means of a flange part (192) arranged, circumferential shoulder (196) and one in the other flange part (190) arranged in the shoulder (196) engaging, circumferential projection (194) 17. Pipe connection according to one or more of claims 11 to 15, characterized by a slightly convex design of the two outer end regions (170) of the sleeve (162, 188). 18. Pipe connection according to one or more of the claims 11 to 17t characterized by at least one radial projection (206) on each Bushing part (188) and a corresponding recess (208) in the region of the pipe ends (172, 174). 19 * Pipe connection according to one or more of the claims 1 to 18, marked by between the inner surfaces (8, 40, 74) of the flared Pipe ends (4, 36, 70, 174) and the surfaces (22, 52, 90) of the inner ring or rings (l6, 46, 86; 104, IO6; 140; 210, 212) arranged seals (20, 50, 84). 20. Pipe connection according to one or more of claims 1 to 19 »geken characterized by formed as spherical surfaces (22, 52, 90) with the inner surfaces (8, 40, 74) of the flared pipe ends (4, 36, 70, 174) interacting Surfaces of the inner ring or rings (16, 46, 86; 104, IO6; 140, 146; 178, 180; 210, 212). - 5-030039/0476 291U48 21. Pipe connection according to one or more of claims 1 to 20, characterized by by an outer ring (24, 56, 92, 122, 144, 150). 22. Pipe connection according to claim 21, characterized by a releasable connection (34, 134) between the outer ring halves. 23. Pipe connection according to claim 2.1 or 22, g e k e η η - characterized by an outer ring (54, 56, 92, 122, 144, 150) with two opposite, the reach behind the flared pipe ends (4, 36, 70, 174) at the and at least partially the corresponding exterior » surfaces (6, 38, 72) of the flared tube ends (4, 36, 70, 174) adjacent parts (26, 58, 94). 24. Pipe connection according to claim 23, marked by spherical surfaces (26, 58, 94) formed on the outer surfaces (6, 38, 72) of the pipe ends (4, 36, 70, 174) adjacent surfaces (28, 60, 96, 126, 160) of the outer ring (24, 56, 92, 122, 144, 150). 25. Pipe connection according to claim 23 or 24, characterized by a first limitation (29, 62, 98) which bear against the outer surfaces (6, 38, 73) of the flared pipe ends (4, 36, 70, 174) Faces (28, 60, 96, 126, 160) with a diameter, the smaller than the diameter of the flared Pipe end (4, 36, 70, 174), but larger than 8 the diameter of the non-flared pipe part (2, 154, 172) and by a second limit (30, 64, 100, 146), whose diameter is at least equal to the diameter of the flared pipe end (4, 36, 70, 174) is. 030039/0476 291U48 26. Drilling connection according to claim 25, marked chnet through the second limit and stops for the leading edges (10, 42, 76, 176) of the flared Paragraphs (30, 64, 100, 146) in the outer ring (24, 56, 92, 144, 150). 27. Pipe connection according to claim 3, 4 or 5 and 26, characterized in that the Steps (64, 100, 146) in a radially inwardly directed, in the groove (54, 88) engaging, circumferential Pass over projection (66, 104, 148). 28. Pipe connection according to one or more of the claims 1 to 27, characterized in that the outer ring (24, 56, 92, 144, 150) on the outer surfaces (6, 38, 72) of the threaded pipe ends (4, 36, 70, 174) is clamped radially. 29> Pipe connection according to one or more of Claims 1 to 26 and 27, characterized in that the outer ring (56, 144, 150) is braced radially on the inner ring (104, IO6) via the projection (66, 148). 30. Pipe connection according to one or more of the claims 1 to 27, characterized in that the outer rings (122) on the outer surfaces (52) of the flared pipe ends (36) are axially braced. 31. Pipe connection according to claim 26, gekennzei chnet by a second boundary (30, 64, 100, 146) with the diameter of the aufgebordel th drill end (4, 36, 70, 174) border diameter and into the space between the second constraining (30, 64, 100, 146) and the front edges (10, 42, 76, 176) of the flared pipe ends (4, 36, 70, 174) - 7-030039/0476 291U48 - 7 -1> are and rings filling this space (138). 32. Pipe connection according to one or more of claims 1 to 31, characterized by double-sided, sleeve-like extensions (152) of the Outer ring (150). 33. Pipe connection according to one or more of the claims I to 32, characterized by spherical surfaces (6, 8; 38, 40; 72, Tk) forming, up flared pipe ends (4, 36, 70, 174). 34. Pipe connection according to claim 33, characterized in that the curvature smlt tel punk te (hk) of the ball outer surfaces (38) and the ball inner surfaces (40) coincide. 35. Pipe connection according to one or more of the claims II to 18, characterized by a cylindrical widening arranged between the pipe (2) and the flanged pipe end (36, 174) (154, 172). 36. Pipe connection according to one or more of the claims 1 to 35 »characterized by at least one angle with respect to the pipe axis flared pipe end inclined by less than 90 ° (36, 174). 37 · Pipe connection according to claim 36, characterized by a flared between the Pipe end (36) and a straight pipe section (2) arranged elbow (136). 030039/0476