CH707656B1 - Component with fluid-carrying pipe section and separate fluid-free flange. - Google Patents

Abstract

A component (1) comprises a fluid-carrying pipe section (10) with an orifice, wherein the orifice is provided with a separate flange (30), and wherein the flange (30) is fastened on the pipe section in a manner free from fluid.

Description

description

Technical Field The invention relates to a component comprising a fluid-carrying pipe section with an opening, the opening being provided with a separate flange.

PRIOR ART Fluid-carrying components are known from various fields of application. For example, pipes and valves are used in drinking water installations. Such components are also used in the chemical industry for transporting gases, liquids and possibly even pumpable or free-flowing solids.

DE 10 064 976 A1 (KSB) relates to a fitting, the housing of which is equipped with housing end faces for contact with pipelines and / or system components. The valve body is designed as a pinch valve and a connection adapter is permanently attached to the front of the housing. The connection adapter can be connected to the fitting unit with a rolled-in collar, which is an integral part of the housing or the connection adapter - or can be used as a ring in the housing and the connection adapter. An anti-rotation lock between the housing and adapter can be achieved with dowel pins or by an eccentric fit.

US 3 155 368 A (Shafer) relates to a seal for a ball valve. The pipes each include an inner flange facing the valve and an outer flange for connection to a pipe. The inner flange comprises a spherical area, which corresponds to the ball of the ball valve, and is provided with Teflon seals.

DE 2 658 671 A1 (Keystone) relates to shut-off devices provided with flaps, in particular throttle flaps, which are clamped or clamped between two flange connections or fittings in a pipeline.

The known systems for fluid-carrying components have the disadvantage that the production of the components is complex and therefore expensive.

DESCRIPTION OF THE INVENTION The object of the invention is to provide a component belonging to the technical field mentioned at the beginning with a fluid-carrying pipe section which is simple and inexpensive to produce, but can nevertheless meet the high requirements, in particular in the area of drinking water supply.

The solution to the problem is defined by the features of claim 1. According to the invention, the flange is fastened on the pipe section without any fluid guidance.

In the following, the term “axial” is understood as a direction perpendicular to an opening plane of a pipe section or a pipe.

[0010] The term “component” is understood below to mean, for example, a pipeline, a pipe branch (for example a T-piece), a valve or the like. The fluid-carrying pipe section can be designed to be suitable for carrying liquids or gases. The liquids can be water, crude oil, fuels and other chemicals. The gases can exist as gas mixtures such as natural gas or air, but can also include pure gases such as nitrogen, oxygen, carbon dioxide etc. In a preferred embodiment, the component is suitable for carrying liquids, preferably water, in particular drinking water.

The component comprises a pipe section and a separate flange. The term “separately” is understood to mean, in principle, a non-one-piece design of the component, the flange and the tube section being detached from one another or not connected to one another at a stage of manufacture. This can be achieved, for example, by a flange manufacturing process that is separate from the pipe section. The two manufacturing processes can be the same, for example a casting process or the like. However, it is also conceivable that the pipe section and the flange are produced using different manufacturing processes, since the mechanical and chemical requirements for the pipe section and the flange can be different. For example, a pipe section is cast while a flange is milled, laser cut, turned (e.g. on a lathe) or otherwise manufactured. Mechanical requirements include, for example, pressure resistance, resistance to abrasive substances, hardness, toughness, flexibility, etc. Chemical requirements include, for example, corrosive properties, chemical resistance, etc. The latter requirements are particularly important for plastic components. On the other hand, the pipe section and flange can also be produced by the same production method and in particular also together. For example, a casting mold can be designed in such a way that the pipe section and the flange and, if appropriate, further parts can be cast at the same time, so that particularly efficient and economical production can be achieved.

As a further advantage in the separate production of the pipe section and the flange, it should be mentioned that any casting molds (if the parts are cast) can be dimensioned smaller, since the flange, which typically makes the entire casting mold bulky, is manufactured separately , It can also be used to make more complex ones

CH 707 656 B1

Molds, such as bracing on the flange to improve stability, are cast. At most, this can also reduce the effort required for post-processing. In particular, post-processing can be simplified since smaller parts can be handled. For example, it is much easier to handle a single flange for a milling or turning operation than a pipe section with a flange (for example, an entire valve, a pipe, or the like).

The storage and transport of the components can be optimized by assembling the components only on site. The storage of individual flanges and individual pipe sections can typically take place in a space-saving manner than the storage of a component which is connected to a flange. Finally, this also enables a modular construction of the components, so that different flanges can be provided for one pipe section type, which in turn saves storage space, since the components are assembled from the different flange types and pipe section types only after the order has been received.

The flange is typically used to connect two components. Such a flange can, for example, essentially be designed as a circular ring which comprises axial holes oriented in the plane of the circular ring for receiving connecting screws. However, the flange can also have other shapes, for example a star shape with a central opening, the holes each being formed in a spike of the star. This can save material and costs. Two components, for example a valve and a pipe or two pipes, can be connected by screwing over the holes of the respective flanges, by aligning the axial holes of the valve flange with the axial holes of the flange of the pipe and via a screw connection screwed with screws and nuts and pressed together. The screw connection can achieve the sealing effect of the connection of the two components.

The term "fluid-free" is understood below to mean a construction of the component in which the flange does not come into contact with the fluid which is guided through the component. In a preferred embodiment, this is achieved in that the flange comes to rest on the pipe section in the assembled state. Of course, this goal can also be achieved by having a separate pipe through the fluid carrying area, i.e. is inserted through the pipe section and the flange.

[0016] The flange and the pipe section preferably differ in at least one material property, in particular in an alloy composition. For example, the fluid-carrying parts, that is to say preferably the pipe section, can thus be formed from a higher-quality material than those parts which are not fluid-carrying. The pipe section can thus be made of stainless steel, for example, while the flange is made of a gunmetal alloy. The pipe section and the flange can of course also be made of other materials, preferably of metal or metal alloys. The choice of material for the pipe section is preferably adapted to the requirements of the goods to be guided. Thus, a pipe section for the drinking water supply can be made of a different material than a pipe section for a natural gas line or the like. The flange can, however, be made of a material that only fulfills the requirements for mechanical stress, regardless of the material to be guided, since the flange is free of fluid and therefore does not come into contact with the fluid. In principle, the pipe section and the flange can also be made of suitable plastics. Furthermore, the flange or the pipe section can comprise a plurality of regions which differ in terms of a material property. For example, the pipe section can also have a coating on the inside in the area of the fluid guide, so that areas of the pipe section that are not fluid-carrying can include an inferior, cheaper or simply a material with different chemical or physical properties than the coating.

Alternatively, the flange and the pipe section can also be formed from the same material. Even in this way, you can benefit from advantages in production, among other things, because the molds can be made more compact.

A flange preferably comprises a central opening for plugging onto a pipe mouth, the central opening having a shoulder for axially fixing it to a pipe mouth. With this central opening, the flange can also be mounted on an axially split pipeline and at the same time press the two half-shells of the pipeline together. The latter can be achieved by conical design of the pipe mouth at the point of sale.

[0019] The flange does not necessarily have to have a shoulder. In variants, it could also be provided with axial holes through which the flange can be screwed to a pipe mouth.

[0020] The flange preferably has ribs, preferably radially arranged ribs, for stabilization. This can improve the stability of the flange and at the same time reduce material consumption and the weight of the flange. The flange can also be provided with other structures to stabilize and reduce material consumption.

[0021] In variants, the ribs can also be dispensed with.

A component housing, in particular a water-carrying valve housing, comprises a component with a pipe section, the pipe section in the region of an opening comprising an outer circumferential shoulder as a stop for a flange.

Preferably, the pipe section comprises an external thread in the region of a mouth, the flange being held on the external thread by means of a screw connection. This creates a particularly simple connection between the

CH 707 656 B1

Pipe section and the flange created. This allows the flange to be mounted precisely on the pipe section. The screw connection has the further advantage that it is easy to produce. Finally, a particularly stable connection can be created with a screw connection.

[0024] In variants, the flange can also be connected to the pipe section in some other way. For example, the flange can be welded to the pipe section. Since the flange is not fluid-carrying, a sealing effect is not absolutely necessary, so that the flange can also be attached to the pipe section via a simpler connection. For example, a bayonet lock, a C-coupling (also known as a fire service coupling or hose coupling) or the like is conceivable. The connection can be such that a flange is only permanently installed when an axial pull or pressure acts on the flange, that is, when the flange is screwed to a flange of another component.

Preferably, the component further comprises a nut, in particular a separate lock nut, which forms the screw connection via an internal thread with the external thread of the pipe section. This means that the flange can also be made from a material that is not particularly suitable for forming a thread. For example, the lock nut can be made of steel, while the flange is made of gunmetal alloy. Furthermore, different flanges can be provided, which can each be screwed onto a pipe section with the same type of lock nut. A particularly cost-effective kit for components with a pipe section and a flange can thus be created.

Alternatively, the pipe section can comprise an internal thread, the lock nut being, for example, L-shaped. In this case, the lock nut would also carry fluid. In variants, however, the lock nut can also be dispensed with, with which an internal thread is formed on the flange or if the flange is attached to the pipe section in some other way, for example by a welding process.

The flange preferably comprises a nut which can be arranged in the shoulder of the flange, the nut preferably being formed separately from the flange.

In variants, as mentioned above, the shoulder of the flange can also be dispensed with.

Preferably, the pipe section and the flange comprise a press-fit area, so that a press-fit connection can be achieved between the press-fit area of the pipe section and the press-fit area of the flange. This enables a particularly precise and stable connection to be created between the pipe section and the flange.

In variants, the press fit area of the pipe section and the flange can be dispensed with. Instead, a suitable seal can be provided, for example. This can be designed as an O-ring, brass sleeve and the like.

The external thread preferably adjoins the mouth and the external thread in the proximal direction of the press-fit region for the flange. For this purpose, the press-fit area of the pipe section preferably has a larger diameter than the external thread area.

In variants, the press-fit area can also be dispensed with, in particular if the precision of the mouth of the pipe section and the flange is sufficient or if the quality requirements for the connection between the flange and the pipe section permit this.

Preferably, the press-fit area of the pipe section and the press-fit area of the flange are designed as a cone, in particular as a cone without an axial stop, or as a cylinder, in particular as a cylinder with an axial stop.

In principle, only the pipe section or only the flange can have a conical shape. With a press-fit area designed in this way, a particularly simple assembly of the component is achieved, since the cone shape can be selected such that the flange can be pushed onto the cone without force to a certain depth. The formation of a cone is advantageous for the assembly, since the centering of the flange is thus achieved in a simple manner. This also protects the O-ring. Tilting of the flange during assembly can thus be largely avoided. The configuration of the cone is to be preferred in particular in an application in which axial loads, such as tensile or compressive forces, which are not too great occur. The press fit can then be achieved by screwing, for example by screwing on the lock nut. The cone is preferably designed without a depth limit or without a stop, so that an interference fit can be achieved in any case.

[0035] However, the formation of a cone can also have disadvantages. For example, under axial load, for example in the event of a compressive or tensile load between the flange and the housing, the O-ring can be relieved, which can cause the component to leak.

For these reasons, the cone can also be dispensed with. In this case, the pipe section in the region of the mouth is preferably cylindrical. The press-fit area is preferably formed by an oversize of the cylindrical shape. The loose flange is preferably installed with play, for example with 0.05 mm play, so that escape errors can be recorded. The seal is taken over by an O-ring. A press fit is an advantage to achieve a positive connection. Furthermore, a stop for

CH 707 656 B1 the flange may be provided. To prevent the flange from tilting during assembly, a centering device can be provided. The formation of the cylindrical region of the pipe section enables a constant contact pressure, even when the load changes. An O-ring is preferably arranged between the cylindrical region of the tube section and the flange, which improves the sealing of the component. In the case of a cylindrical fit, the O-ring is loaded with constant pressure when the load changes, so that the tightness of the connection between the pipe section and the flange remains guaranteed even under extreme loads.

Preferably, the press-fit area of the pipe section and the press-fit area of the flange have a non-circular contour, which are particularly preferably radially symmetrical. The non-round contour can for example be polygonal or have the shape of a circle with a segment of a circle segment. Furthermore, the non-round contour can also be provided by an axial tongue and groove connection between the flange and the pipe section. With the non-round contour, a precise positioning of the flange relative to the pipe section is achieved. This is particularly relevant if one of two pipe sections to be connected via the flanges is to be exactly aligned with respect to an axial rotation. This is typically the case if the component comprises a valve, is designed as a T-piece or a bent pipe section.

In variants, the orientation of the flange with respect to the pipe section to which the flange is attached can also be achieved via an axial guide, for example a tongue and groove guide or the like.

The press-fit region of the pipe section and the press-fit region of the flange are preferably designed as a non-trivial constant thickness, in particular as a Reuleaux triangle. This creates a particularly robust connection that is precise with respect to an axial rotation between the flange and the pipe section, since a load on the fit area is optimized, for example in comparison with a polygonal shape. The formation of a non-trivial constant thickness has the further advantage that, starting from the circular shape, little material has to be removed, so that a simple and inexpensive anti-rotation device is made possible when the flange is mounted on the pipe section.

The non-trivial constant thickness can be constructed by drawing the partial circles with a radius of k * Ru starting from a regular polygon, for example a triangle with a radius of radius Ru. The value k is preferably between 5 and 15 and is in particular approximately 10.

The constant thickness is preferably designed such that the diameter of the constant thickness is expanded by 0.5 to 3%, particularly preferably between 1 and 2%, in particular approximately 1.5% of the diameter in relation to the inner circle.

In a further variant, a cylindrical (without cone shape) constant thickness with a depth stop can also be provided. In this case, the flange preferably has a play of approximately 0.05 mm to the uniform thickness. In variants of this, the constant thickness can be designed as a cone with an angle of approximately 5 °. In this case, there is no need for a depth stop. However, higher demands are typically placed on production. Finally, the two variants can also be combined. A cylindrical sealing surface is provided, which comprises an O-ring, so that the O-ring can be preloaded evenly. In addition, a steep cone of constant thickness can be provided with an angle of approximately 10-15 °.

In variants, the non-trivial constant thickness can also be dispensed with. In principle, a polygonal shape can also be provided.

A non-trivial constant thickness is preferably milled in an area of a mouth. This enables a constant thickness with the necessary precision to be achieved in a particularly efficient manner.

In variants, the constant thickness can also be cast directly. After a casting process, if precision is required, the constant thickness can be reworked.

[0046] A tightening angle of preferably 0.5 to 15 °, preferably approximately 10 °, is preferably provided in a region of a mouth of the pipe section. This suit can, for example, be given or milled directly through a casting mold.

In variants, the suit can also encompass a different angular range, which can be smaller but also larger than the two above ranges.

The flange and / or the pipe section preferably comprises an O-ring in the fit area. This creates a sealing effect between the flange and the pipe section.

[0049] Alternatively, the O-ring can also be dispensed with. The sealing effect can also be achieved by a suitable choice of material for the flange, the pipe section or the lock nut. For example, an O-ring can be arranged on the end face of the pipe section, which in the assembled state would be axially pressed by a second end face of another component.

The pipe section preferably has a nominal diameter between DN 65 and DN 125, particularly preferably between DN 65 and DN 100, in particular DN 25, DN 32, DN 40 or DN 50. In variants, the pipe section can also have other nominal sizes.

CH 707 656 B1 The component is preferably T-shaped, with two, in particular aligned, openings, the two openings each being connected to a flange. In variants, the component can also be designed as a pipeline or the like. The component can also comprise three or more orifices.

Preferably, the component is designed as a valve, in particular as a straight seat valve. However, it is clear to the person skilled in the art that other valves, in particular inclined seat valves, pressure reducing valves or else filters, system separators and the like, can also be provided.

In a method for producing a component with a flange and a pipe section, a flange and the pipe section are cast separately and the flange is mounted on the pipe section radially and preferably in such a way that the flange is free of fluid flow. The flange is preferably attached to the pipe section with a separate nut, but this can also be dispensed with. It is clear to the person skilled in the art that the flange and the pipe section do not necessarily have to be produced in a casting process. For example, the flange can also be turned or manufactured using another machining process. The pipe section can, for example, also be produced from two partial shells, which are produced by means of a punching process.

The following detailed description and the entirety of the claims result in further advantageous embodiments and combinations of features of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The drawings used to explain the exemplary embodiment show:

Figure 1 is a schematic representation of a cross section along a longitudinal axis of a component comprising a pipe section, an O-ring, a flange and a lock nut, in an exploded view.

FIG. 2 shows an illustration according to FIG. 1 in the assembled state;

Fig. 3 is a schematic representation of a component, designed as a straight seat valve housing;

4 shows a schematic illustration of a component, designed as a pipeline; and

Fig. 5 is a schematic representation of a component, designed as a T-piece with three flanges.

WAYS OF IMPLEMENTING THE INVENTION In principle, the same parts are provided with the same reference symbols in the figures.

In the following, “axial” is understood to mean a direction parallel to a fluid guidance direction at the mouth of the pipe section or a direction perpendicular to a cross-sectional plane of the pipe section, the flange or the lock nut. Unless otherwise defined, diameters of any type are oriented at right angles to an axial direction defined above.

1 shows a schematic illustration of a cross section along a longitudinal axis of a component 1 comprising a pipe section 10, an O-ring 20, a flange 30 and a lock nut 40, in an exploded view.

The flange 30 and the pipe section 10 are castings in the present case. The lock nut 40 can be made from a continuous cast profile with attached wrench flats.

The pipe section 10 is shown here as an end piece of a pipe, wherein the end piece can be formed as part of a valve, pipe, container outlet etc. The pipe section has two shoulders 11, 13 which run around the outside in the mouth region. The two paragraphs 11, 13 are designed like a staircase in cross section. The first paragraph 11 forms a step from the outer jacket of the tube section 10. The diameter of the tube section 10 in the area of the paragraphs 11, 13 is therefore smaller than that of the tube area which adjoins the paragraphs 11, 13.

The first paragraph 11 of the pipe section 10 is provided with a groove 12 for receiving the O-ring 20. This seals the contact surface to the flange 30. This paragraph 11 as a whole has an outer contour in the form of a Reuleaux triangle. In the present case, this is constructed from a triangle with a radius of around 1/10 of the radius of the tube section 10, in which the partial circles of the Reuleaux triangle are drawn from the corners of the triangle. The Reuleaux form is not shown in the figures. Finally, the shoulder 11 of the pipe section 10 is slightly conical, so that the flange 30 can be held on the pipe section 10 by an interference fit. The cone has a tightening angle of 5 °. This training is inexpensive because there is no need for a depth stop and is reliable with regard to the seal. On the other hand, high demands are placed on production. The same thickness can also be designed without a cone, that is, cylindrical. The cone and the Reuleaux triangle are achieved in the present embodiment by a milling process, but can also be preformed by the casting process.

CH 707 656 B1 The second paragraph 13 immediately adjoins the first paragraph 11 and has a smaller diameter than the paragraph 11. The paragraph 13 is flush with the mouth of the pipe section 10 and comprises a circumferential external thread for screwing on the Lock nut 40.

In the present embodiment, the O-ring 20 has a cord diameter between 1.5 and 4 mm, in particular approximately 3 mm. The diameter is selected such that it can be clamped into the groove 12 under slight tension. The O-ring 20 can also be dimensioned differently.

The flange 30 essentially has the shape of a circular disk. On the circumference, it is provided with axial bores 32, via which component 1 can be screwed to a flange of another component. The present flange has eight circularly arranged bores 32, but it is clear to the person skilled in the art that the number of bores can be between three and 12, depending on the size of the component and the use. With very large lines, for example natural gas lines, the number of holes can also be significantly larger. A diameter of such a bore 32 is also adapted to the respective requirements. This can be, for example, 18 mm if the flange has a diameter between 185 mm (DN65) to 220 mm (DN100). These bores 32 or screw bores 32 are already provided by the casting mold. This is possible because the flange can be cast separately from the pipe section.

The flange 30 has a central opening into which the pipe section 10 with the two sections 13, 11 is inserted. This opening also comprises two shoulders, namely a first shoulder 31, which has the Reuleaux shape according to the first paragraph 11 of the pipe section and a second shoulder 33, which is widened compared to the first paragraph 31. Between the first paragraph 31 and the second paragraph 33 of the flange 30 there is also a staircase in cross section. The axial depth of the first shoulder 31 of the flange 30 is slightly greater than the axial depth of the shoulder 11 of the pipe section 10. The total depth of the steps 31 and 33 of the flange 30 corresponds to the total depth of the steps 11 and 13 of the pipe section 10, so that at on the pipe section 10 mounted flange 30, the mouth of the flange 30 is flush with the mouth of the pipe section 10. This ensures that two components 1 can be connected via their flanges 30 in such a way that a tight connection is achieved. Both the two flanges 30 and the two pipe sections 10 are pressed together.

Finally, the component 1 comprises a lock nut 40, which has an essentially ring shape. This serves to pull the flange 30 onto the cone or onto the first shoulder 11 of the pipe section. The lock nut 40 has an internal thread which corresponds to the external thread of the second paragraph 13 of the pipe section. The outside diameter of the lock nut 40 corresponds to the inside diameter of the flange 30 in the area of the shoulder 33 or the diameter of the shoulder 33. The lock nut 40 can also be designed as a sealing surface on the end face of the component 1.

1, the O-ring 20 is initially placed in the groove 12 of the shoulder 11 of the pipe section. The flange 30 is then guided with the first shoulder 31 onto the first shoulder 11 of the pipe section 10. One of the three possible orientations of the flange 30 is selected, which is predetermined by the Reuleaux triangular shape of these paragraphs. Due to the conical shape of the shoulder 11 of the pipe section 10, a relatively large force has to be applied. This is provided by screwing in the lock nut 40 - the flange 30 is thus pressed as far as the stop in the region of the transition from the step 11 to the pipe jacket of the pipe section 10. It is clear that depending on the design of the cone, the flange may not reach the stop. FIG. 2 shows an illustration according to FIG. 1 in the assembled state. 2 it can be seen in particular that the lock nut is not guided up to the stop between paragraphs 11 and 13 of pipe section 10. This ensures that there is contact pressure in the axial direction. In the meantime, the conical shape ensures that a contact pressure in the radial direction keeps the flange 30 stable.

The three application examples described below each comprise flanges 30, which are designed according to the above description. However, the invention is not to be restricted to these examples, but encompasses any variants described under “Presentation of the Invention”.

3 shows a schematic representation of a component, designed as a straight seat valve housing 1.1. Essentially, the straight seat valve housing 1.1 is a T-piece with two coaxial pipe sections 10.1 with a flange 30 and a connector 16 oriented at right angles to the pipe sections 10.1 for receiving an upper valve part. The T-piece further comprises a radially oriented valve seat 15 in the center of the coaxial pipe sections, which can be closed with a valve disk of an upper valve part.

4 shows a schematic representation of a component, designed as a pipeline 1.2. The pipeline 1.2 comprises a pipe section 10.2, which is provided on both sides with a flange 30.

5 shows a schematic representation of a component, designed as a T-piece 1.3 with three flanges 30.

Instead of a lock nut, the flange 30 can also be connected to the housing with individual screws, the pipe section 10 in this case having axial bores in the region of the mouth on the flank of the first paragraph. The flange 30 can also be welded to the pipe section 10 or connected in some other way.

CH 707 656 B1 It is clear to the person skilled in the art that the principle of the fluid-free flange can also be used more generally. In particular, for example in the case of nozzles for chemical reactors, stirred tanks, etc. The principle can also be used in engines, for example in the area of exhaust systems or in the construction of water slides. Other possible fields of use are also known to the person skilled in the art.

In summary, it can be stated that, according to the invention, a fluid-carrying component is created which can be produced particularly simply and inexpensively.

CH 707 656 B1

Amended claims

Claims (13)

claims 1. Component (1), in particular a water-carrying component (1), comprising a fluid-carrying pipe section (10) with an opening, the opening being provided with a separate flange (30), characterized in that the flange (30) is fluid-free the pipe section is attached. 2. Component (1) according to claim 1, characterized in that the flange (30) and the pipe section (10) differ in at least one material property, in particular in an alloy composition. 3. Component (1) according to claim 1 or 2, characterized in that the pipe section (10) in the area of said mouth comprises an external thread (13), the flange (30) via a screw connection (13; 40) on the external thread ( 13) is held. 4. The component (1) according to claim 3, characterized in that it further comprises a nut (40) for screwing on the flange (30), which has the screw connection (13; 40) via an internal thread with the external thread (13) of the pipe section (10) ) forms. 5. Component (1) according to one of claims 1 to 4, characterized in that the pipe section (10) and the flange (30) comprise a press-fit region (11; 31), so that between the press-fit region (11) of the pipe section (10 ) and the press fit area (31) of the flange (30) a press fit connection is reached. 6. The component (1) according to claim 5, characterized in that the press-fit region (11) of the tube section (10) and the press-fit region (31) of the flange (30) are designed as a cone or as a cylinder, in particular as a cylinder with an axial stop , 7. Component (1) according to claim 5 or 6, characterized in that the press-fit region (11) of the tube section (10) and the press-fit region (31) of the flange (30) have a non-circular contour, which are preferably radially symmetrical. 8. Component (1) according to claim 7, characterized in that the press-fit region (11) of the tube section (10) and the press-fit region (31) of the flange (30) are designed as a non-trivial constant thickness, in particular as a Reuleaux triangle. 9. Component (1) according to one of claims 5 to 8, characterized in that the flange (30) and / or the pipe section (10) in the press-fit region (11; 31) comprises an O-ring (20). 10. Component (1) according to one of claims 1 to 9, characterized in that the tube section (10) in the region of the mouth comprises an outer circumferential shoulder (11, 13) as a stop for the flange (30). 11. Component (1) according to claim 10, characterized in that the shoulder (11) comprises a threaded area (13) and a press-fit area (11) for the flange (30). 12. A method for producing a component (1) according to any one of claims 1 to 11, characterized in that the flange (30) and the pipe section (10) are cast separately and the flange (30) on the pipe section (10) radially such is mounted so that the flange (30) is free of fluid flow. 13. The method according to claim 12, characterized in that a non-trivial constant thickness is milled in a region of the mouth of the pipe section (10). CH 707 656 B1