Flange connection

Abstract

The invention proposes a flange connection (110) for at least one line (112) configured to guide fluid. The flange connection (110) comprises: - a flange (114) and a flange counterpart (116), wherein the flange (114) has at least two through-openings (118); - at least one controller (120); - at least two pressure sensors (122) for determining at least one item of connection pressure information, comprising at least one interface (124) for transmitting the connection pressure information to the controller (120), wherein the pressure sensors (122) are arranged in such a way that they each at least partially surround an edge (126) of at least one of the at least two through-openings (118) of the flange (114) on a side of the flange (114) facing away from the flange counterpart (116), - at least two screw connections (128) configured to mechanically fix the pressure sensors (122) on the flange (114) and to fix the flange (114) relative to the flange counterpart (116), wherein the screw connections (128) are each guided through one of the through-openings (118) of the flange (114). The invention further relates to a method for screwing together at least two screw connections (128) of a flange connection (110), and to a method for automatically checking the integrity of at least one flange connection (110).

Description

[0001] flange connection

[0002] Technical field

[0003] The invention relates to a flange connection for at least one line designed for fluid conveyance, a method for tightening at least two screw connections of the flange connection, a computer program for at least partial execution of the method, and a computer-readable medium on which the computer program is stored. Furthermore, the invention relates to a method for automatically checking the integrity of the flange connection, a computer program for at least partial execution of the method, and a computer-readable medium on which the computer program is stored. Devices, methods, and programs of the aforementioned type can generally be used in the manufacturing industry, particularly in the chemical manufacturing industry. Thus, the invention can be used especially in chemical-technical plants in which fluid conveyance takes place, for example, through pipes and / or lines.However, other areas of application are also conceivable in principle.

[0004] Technical background

[0005] Flange connections for fluid-carrying lines, particularly for connecting at least two fluid-carrying lines, are generally known in the art. These flange connections are typically installed by installation personnel, who also connect their individual components. Regular inspection of the integrity of the flange connections is also usually necessary, especially due to material fatigue, and is generally carried out by inspection personnel.

[0006] Despite the advantages of established flange connections, numerous technical and organizational challenges remain. For example, there is typically a high demand for specially trained personnel for the installation and monitoring of flange connections. This personnel deployment incurs costs. Furthermore, a shortage of skilled workers can play a significant role. In addition, fluids are frequently transported through lines and / or pipes in the manufacturing industry, which can be harmful to the surrounding environment. Therefore, particularly when monitoring flange connections during operation, increased protective measures for personnel are usually required. In addition to the use of personal protective equipment, this may sometimes necessitate an interruption of plant operation. Object of the invention

[0007] It would therefore be desirable to provide flange devices and methods for bolting at least two bolted connections of the flange joint, as well as for automatically verifying the integrity of the flange joint, which largely avoid the disadvantages of known devices and methods of this type. In particular, the devices and methods should, on the one hand, enable the smoothest possible operation of production plants and, on the other hand, ensure a high level of environmental safety and cost-efficiency.

[0008] General description of the invention

[0009] This problem is addressed by a flange connection for at least one line designed for fluid conveyance, by a method for bolting at least two bolted connections of a flange connection, and by a method for automatically checking the integrity of at least one flange connection, with the features of the independent claims. Advantageous embodiments, which can be implemented individually or in any combination, are described in the dependent claims.

[0010] In the following, the terms "have," "exhibit," "comprise," or "include," or any grammatical variations thereof, are used in a non-exclusive manner. Accordingly, these terms can refer both to situations in which, apart from the features introduced by these terms, no other features are present, and to situations in which one or more additional features are present. For example, the expression "A has B," "A exhibits B," "A comprises B," or "A includes B" can refer both to the situation in which, apart from B, no other element is present in A (i.e., a situation in which A consists solely of B) and to the situation in which, in addition to B, one or more other elements are present in A, such as element C, elements C and D, or even further elements.

[0011] Furthermore, it should be noted that the terms "at least one" and "one or more," as well as grammatical variations of these terms, when used in connection with one or more elements or features and intended to express that the element or feature may be present once or multiple times, are generally used only once, for example, when the feature or element is first introduced. Upon subsequent mention of the feature or element, the corresponding term "at least one" or "one or more" is generally no longer used, without restricting the possibility that the feature or element may be present once or multiple times.

[0012] Furthermore, the terms "preferably," "in particular," "for example," or similar terms are used in the following text in conjunction with optional features without limiting alternative embodiments. Features introduced by these terms are optional features, and it is not intended that these features limit the scope of protection of the claims, and in particular the independent claims. As the person skilled in the art will recognize, the invention can also be implemented using other embodiments. Similarly, features introduced by "in one embodiment of the invention" or by "in an exemplary embodiment of the invention" are understood as optional features without limiting alternative embodiments or the scope of protection of the independent claims.Furthermore, these introductory expressions are intended to leave all possibilities of combining the features introduced herein with other features, whether optional or non-optional features, unaffected.

[0013] In a first aspect of the present invention, a flange connection for at least one fluid-carrying line is proposed. In particular, the flange connection can be configured to connect at least two fluid-carrying lines. The flange connection comprises a flange and a mating flange, the flange having at least two through-openings.

[0014] Furthermore, the flange connection comprises at least one controller and at least two pressure sensors for determining at least one connection pressure value. In particular, the at least two pressure sensors can be configured to measure the at least one connection pressure value. The pressure sensors include, for example, each or jointly, at least one interface for transmitting the connection pressure value to the controller. The pressure sensors are arranged such that they each at least partially surround an edge of at least one of the at least two through-holes of the flange on a side of the flange facing away from the mating flange.

[0015] Furthermore, the flange connection comprises at least two bolted connections. These bolted connections are designed to mechanically fix both the pressure sensors to the flange and the flange relative to the mating flange. Each bolted connection passes through a through-hole in the flange. The term "pipe designed for fluid conveyance," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to any pipe with at least one inlet opening through which fluid can enter the pipe and at least one outlet opening through which the fluid can exit the pipe. For example, the pipe can have a round cross-section, preferably circular.In particular, the fluid-conducting line can comprise any material impermeable to the fluid conveyed through the pipe, i.e., a material that is impermeable to the fluid for at least a specified and / or predetermined period. For example, the fluid-conducting line can comprise, or be made of, a metal or plastic, or a composite of metal and plastic. For example, the fluid-conducting line can be rigidly connected to at least a part of the flange connection, such as a portion of the flange and its mating flange. For example, the fluid-conducting line can be materially, positively, or force-fit connected to that part of the flange connection. Thus, the fluid-conducting line can, for example, be formed integrally with that part of the flange connection.Alternatively or additionally, the fluid-carrying line can be welded, bolted, and / or clamped to the flange connection, in particular to the flange or the mating flange. For example, part of the fluid-carrying line can be welded, bolted, and / or clamped to the flange, and another part of the fluid-carrying line can be welded, bolted, and / or clamped to the mating flange.

[0016] The term "flange connection," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, shall be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a connection type comprising two parallel surfaces, especially connecting surfaces that are arranged substantially at right angles, for example at an angle of 90° ± 10°, to a transport direction along which the fluid is transported through the conduit designed for fluid conveyance. The flange connection comprises the at least one flange and the at least one mating flange. In particular, the flange connection can comprise at least one loose flange connection, one bolted flange connection, and one welded flange connection.For example, the flange connection can be at least one loose flange connection, a bolted flange connection, and a welded flange connection. In particular, one of the connecting surfaces of the flange connection can be associated with a flange and the other connecting surface with a flange counterpart, for example, being part of the flange or the flange counterpart. Thus, the flange connection can comprise two rectangular, in particular square, or round, in particular circular, connecting surfaces, for example, a rectangular or round flange and a rectangular or round flange counterpart. Preferably, the flange and the flange counterpart of the flange connection have the same rectangular or round shape, at least substantially. Particularly in the case of flange connections with a round shape, the flange and the flange counterpart can also each be referred to as a "flange ring".For example, the two connecting surfaces of the flange connection can be sealing surfaces designed and connected to seal the fluid-carrying line to the outside, in particular to prevent the fluid from escaping, for example by providing at least one seal, such as a ring seal or at least a similar sealing device. For example, the flange and the mating flange can be mirror-symmetrical and / or identical. The mating flange can also have at least two through-openings, just like the flange.

[0017] The term "through hole," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without restriction, the term can refer in particular to a borehole through which at least one screw can be inserted. For example, the through hole can be a standardized opening, such as a circular opening whose diameter corresponds to a predetermined value. Alternatively, the through hole can also be an elongated hole.

[0018] The term "control system," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a one-piece or multi-piece device of the flange connection, which is configured to control and / or monitor at least one function of the flange connection. In particular, the control system can be configured to monitor and / or process and / or provide at least one operating parameter of the flange connection, for example, at least one connection pressure information, at least one bolting information, at least one predetermined target surface pressure, and / or a combination of two or more of these operating parameters.The control system can, in particular, include at least one data processing device, for example, at least one processor.

[0019] Accordingly, the control system can be implemented partly by hardware and / or, alternatively or additionally, completely or partially by software. Furthermore, the control system can include at least one volatile and / or non-volatile data storage device. It can also include at least one interface, for example, a human-machine interface for inputting commands and / or outputting information, for example, to personnel responsible for installing and / or readjusting the flange connection, and / or a wireless or wired interface for the unidirectional or bidirectional exchange of data and / or commands between the flange connection and at least one other device, for example, a screwdriving tool. In particular, the control system can include at least one computer and / or at least one processor.The control system can be, in particular, a central or decentralized monitoring device for the flange connection. Furthermore, the control system can also be connected to at least one sensor of the flange connection, especially the at least two pressure sensors, and, for example, process one or more sensor signals.

[0020] The term "pressure sensor," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to any element or device configured to determine at least one piece of connection pressure information, for example, a pressure and / or a pressure force, quantitatively or qualitatively. The pressure sensor may, for example, utilize measurement principles that are generally known to those skilled in the art.For example, the connection pressure information to be acquired and / or determined can cause a change in at least one part of the pressure sensor, such as at least one change selected from the group consisting of a displacement, a change in position, a change in orientation, a deformation, a strain, or a rotation, which can be acquired qualitatively or quantitatively, for example, by means of at least one measurement principle selected from the group consisting of a mechanical measurement principle, an optical measurement principle, and an acoustic measurement principle. The determination of the connection pressure information can be carried out qualitatively or quantitatively, as described above. A combination of qualitative and quantitative acquisition and / or determination is also conceivable, for example, when several pressure sensors are involved.

[0021] The term "connection pressure information," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without restriction, the term can refer in particular to qualitatively or quantitatively determined pressure information, for example, a pressure force.

[0022] In particular, the connection pressure information can be a Boolean or digital signal indicating, for example, "minimum pressure applied '7' sufficient" or "minimum pressure not applied '7' insufficient". Thus, as soon as a predefined minimum pressure is present, especially at the screw connection associated with the pressure sensor—that is, as soon as the pressure exerted by the screw on the pressure sensor is greater than a threshold value corresponding to the minimum pressure, or as soon as the pressure is at least equal to the threshold value—the connection pressure information can be determined as "sufficient" and a corresponding signal transmitted to the controller.If the specified minimum pressure is not present, particularly at the screw connection associated with the pressure sensor—that is, if the pressure exerted by the screw on the pressure sensor is less than the threshold value corresponding to the minimum pressure—the connection pressure information can be determined as "insufficient," and a corresponding signal can be transmitted to the control system. A qualitative assessment of the connection pressure information can therefore be carried out, for example, by determining whether at least a specified minimum pressure is present or not. This minimum pressure can be fixed or variably adjustable, for example, by qualified personnel.

[0023] Alternatively, the connection pressure information can also be quantified, as described above. In particular, the connection pressure information can be a quantified measured value, such as a measured pressure. For example, the connection pressure information can correspond to a measured pressure exerted by the screw on the pressure sensor. Quantitative acquisition can be achieved, for example, by the pressure sensor generating at least one measurable quantity, such as at least one measurement signal that correlates with the applied pressure, especially at the screw connection associated with the pressure sensor. This measurement signal can also be, for example, the position of at least one measuring element or at least one indicator of the pressure sensor that correlates at least partially with the pressure.

[0024] In particular, in addition to quantitative or qualitative detection of whether a minimum pressure is applied to the bolted connections, the acquisition of connection pressure information can also include a comparison with a predefined maximum pressure. For example, the at least one pressure sensor can also be configured to detect overloading of at least one of the bolted connections, such as an overtightened connection. Specifically, the at least one pressure sensor can therefore detect and / or identify an exceedance of a predefined maximum pressure, such as an overload of the bolted connection. For example, in the event of an exceedance of the predetermined maximum pressure, the connection pressure information can indicate: "Load too high" and / or "Screw overtightened".

[0025] The term "interface," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer, in particular, to any device, fundamentally configured in any way, that is set up to receive at least one piece of information and then, optionally, process and / or forward it completely or partially, for example, to the at least one controller. In particular, the at least two pressure sensors, for example, both or at least one of the pressure sensors, can have at least one interface for transmitting the connection pressure information to the controller.As explained above, the control system itself can also have at least one interface to transmit data and / or commands, such as screw-tightening information, to specialist personnel and / or to exchange them with at least one other device, such as a screw tool.

[0026] The term "bolted connection," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without restriction, the term can refer in particular to any mechanical connection that can be produced by screwing together at least two elements, for example, a screw and a nut. Alternatively or additionally, at least three elements can also be involved in the bolted connection, for example, a threaded bolt and two nuts. Other designs of bolted connections are also possible. For example, a variety of fasteners, which are generally known to those skilled in the art, can be used in the design of the bolted connection.For example, a bolted connection can comprise several elements, in particular at least two elements, which can be selected from a group consisting of: screw, nut, threaded bolt, and threaded blind hole. Other elements such as washers, snap rings, etc., can also be part of the bolted connection.

[0027] The screw connection can, for example, comprise a screw and a corresponding threaded hole or blind hole, for example in the flange counterpart. Alternatively or additionally, the screw connection can, for example, comprise a screw and a nut. Alternatively or additionally, the screw connection can comprise a threaded bolt and two nuts. Alternatively or additionally, the screw connection can, for example, comprise a threaded bolt and a corresponding threaded hole or blind hole, for example in the flange counterpart, as well as a nut.

[0028] For example, the number of pressure sensors in the flange connection can be equal to the number of bolted connections in the flange connection. In particular, each bolted connection can be assigned exactly one pressure sensor. For example, a pressure sensor can be positioned along at least part of an edge of each through-hole in the flange intended for the bolted connection.

[0029] Alternatively or additionally, at least two pressure sensors can be assigned to each bolted connection. In particular, two pressure sensors can be provided for each bolted connection, for example, positioned on opposite sides of the through-hole through which the bolted connection is located. For instance, a first pressure sensor assigned to the bolted connection can at least partially surround the edge of the through-hole of the flange on the side facing away from the mating flange, and a second pressure sensor assigned to the bolted connection can at least partially surround an edge of a through-hole of the mating flange on the side of the mating flange facing the flange. For example, this allows for redundant determination of the connection pressure information, which can increase the accuracy and / or reliability of the determination, especially the pressure measurement.The flange can have at least four through-holes, and the flange connection can comprise at least four bolted connections, which can pass through the through-holes of the flange. In particular, exactly one bolt can pass through each of the through-holes provided for the bolted connection. Alternatively or additionally, the number of bolted connections and / or the number of through-holes of the flange connection can be specified, for example, by at least one standard, in particular by a standard of DIN EN 1591 and DIN 2510, or, for example, by the standard DIN 931.

[0030] The pressure sensors can, for example, completely enclose the edge of the through-holes. In particular, the pressure sensors can completely enclose the edge of the through-holes through which the bolted connection passes. The pressure sensors can be arranged and / or positioned such that each pressure sensor completely surrounds the through-hole on the side of the flange facing away from the mating flange. The pressure sensors can, for example, be at least partially ring-shaped.

[0031] The pressure sensors may include at least one pressure sensor selected from the group consisting of: membrane pressure sensor; film-based pressure sensor, in particular film pressure sensor, for example printed film sensor, in particular as part of printed electronics; piezoelectric thin-film sensor; organic field-effect transistor (OFET), for example in printed electronics; thick-film pressure sensor.

[0032] The flange connection may further comprise at least one protective layer. In particular, at least one of the at least two pressure sensors may be arranged between the at least one protective layer and the side of the flange facing away from the mating flange. The term "protective layer" as used here is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, shall be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term may refer in particular to a planar element that is arranged on the surface of any component or object and performs at least one protective function.The protective layer can, for example, protect at least one object positioned on one of its surfaces, such as the pressure sensor, from at least one mechanical impact occurring on the other surface of the protective layer, such as a force, in particular a frictional force. The protective layer can thus be designed, in particular, to protect the pressure sensor from at least one frictional force. For example, from the frictional force exerted by at least one of the screw connections, such as during the manufacture of the screw connection, i.e., during the tightening of the screw connection elements. In particular, the protective layer can, for example, protect the pressure sensor from rubbing and / or twisting of a surface of the pressure sensor, for example, when tightening the screw connection.For example, the protective layer can be designed to protect at least one of the at least two pressure sensors from external influences, particularly mechanical influences, such as frictional and / or shear forces. The protective layer can therefore be designed to protect the sensor from at least one force that could, for example, in the absence of the protective layer, cause shearing of the pressure sensor, in particular damaging the pressure sensor and / or distorting the measurement result, such as the connection pressure information.

[0033] The protective layer can, for example, be designed as a separate, independent component from the flange. Alternatively, the protective layer can also be applied directly to the flange as a surface, similar to paint.

[0034] The protective layer can have at least two through-openings, for example, according to a flange design. In particular, the protective layer can have through-openings whose number and position correspond to the number and position of the bolted connections, and especially the through-openings of the flange.

[0035] The protective layer can comprise at least one stable material with a smooth, lubricating surface. For example, the protective layer can comprise at least one material selected from the group consisting of a metal or metal alloy, such as steel, nickel, brass, or similar metals or metal alloys, and carbon. The protective layer can, for example, be and / or enclose a metal sheet. Alternatively or additionally, the protective layer can, for example, comprise at least one carbon fiber, such as a carbon fiber-reinforced plastic, or consist of such a material.

[0036] Between the flange and the flange counterpart, at least one seal, in particular a sealing ring, can be arranged. For example, the at least one seal can be positioned concentrically to the line designed for fluid conveyance. The flange counterpart can, in particular, be designed as a second flange. For example, the second flange, i.e., the flange counterpart designed as a second flange, can be mirror-symmetrical to the first flange.

[0037] The at least one line designed to convey fluid may, for example, have a weld. In particular, the weld may be a fastening weld. For example, the weld may be a weld through which the line is attached to at least one element, such as the flange of the flanged connection or to another flange.

[0038] The at least one fluid-carrying line connected via the flange connection can, for example, be configured to carry at least one fluid from a chemical process in the chemical industry. In particular, such a fluid can include, for example, water vapor, cooling water, or nitrogen.

[0039] For example, the line designed for fluid conveyance can be connected to a device on at least one side. This device can be selected, in particular, from the group consisting of: column, tank, measuring instrument, valve, fitting, and similar components and / or elements. The device, for example, the column, can be, in particular, part of a production plant in the chemical industry.

[0040] In a further aspect of the present invention, a method for bolting at least two screw connections of a flange connection according to the invention is proposed, for example according to one or more of the embodiments described above and / or according to one or more of the embodiments described in more detail below. The method for bolting at least two screw connections of a flange connection according to the invention may also be referred to herein as the "bolting method". The method comprises the steps described in more detail below. These steps can be carried out in the sequence mentioned. However, a different sequence is also possible in principle. Furthermore, two or more of the process steps mentioned can be carried out overlapping in time or simultaneously. Furthermore, one or more of the process steps mentioned can be carried out once or repeatedly.The procedure may include further procedural steps beyond those mentioned, which are not listed.

[0041] The bolting procedure comprises the following steps: i) providing the at least one flange connection; ii) providing at least one tool for tightening bolted connections, in particular a bolting tool, for example a torque wrench; iii) determining the connection pressure information for at least two of the bolted connections by means of at least two pressure sensors; iv) transmitting the connection pressure information to the controller by means of the at least one interface of the pressure sensors; v) generating a bolting command based on the connection pressure information and a predetermined target surface pressure by means of the controller; vi) tightening the bolted connections according to the bolting command using the tool.

[0042] Since the flange connection is the flange connection according to the invention in accordance with one or more of the embodiments described above and / or in accordance with one or more of the embodiments described in more detail below, reference is made to the explanations relating to the flange connection with regard to definitions of terms and embodiments.

[0043] In particular, step i) may, for example, include assigning the bolted connections to the respective through-holes. For example, step i) may, in particular, include inserting at least one of the elements involved in the respective bolted connection through the respective through-hole, at least of the flange.

[0044] The tool in step ii) may, in particular, include a screwdriving tool, such as a torque wrench. The term "screwdriving tool" as used here is a broad term and should be interpreted according to its ordinary and common meaning as understood by a person skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term may, in particular, refer to a tool suitable for tightening or loosening at least one screw connection. In particular, the screwdriving tool may, for example, include at least one tool, in particular, selected from the group consisting of wrenches, torque wrenches, power screwdrivers, electronically controlled power screwdrivers, and electronic torque wrenches.In particular, if the control system, for example via the interface, especially as described above via the human-machine interface, outputs the screwing information to specialist personnel, the tool may include an ordinary screwdriving tool, for example a hand-operated or electrically powered one, such as a torque wrench or another screwdriving tool selected from the group listed above.Alternatively or additionally, for example, in the case where the control, for instance via the interface, in particular as described above via the wireless or wired interface for the unidirectional or bidirectional exchange of data and / or commands between the flange connection and at least one other device that outputs tightening information directly to the tool, the tool may be, for example, a tool suitable for receiving tightening information and / or include, for example, an electronic torque wrench, in particular a fully or partially automated tightening tool. For example, the tool suitable for receiving tightening information may be configured to automatically adjust a torque applied by the tool, in particular according to the tightening information.

[0045] The term "bolt information," as used here, is a broad term and should be understood in its usual and common sense, as understood by those skilled in the art. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to instructions and / or information for creating at least one bolted connection, for example, for tightening at least one screw and / or tightening at least one threaded connection. Thus, the bolt information may, for example, include a torque specification. Alternatively or additionally, the bolt information may also include an angle of rotation. For example, the bolt information may include information on both a torque specification and an angle of rotation.Further information, such as the position of the bolted connection, for example, the specific through-hole associated with the bolted connection for which the torque and / or angle of rotation applies, can also be part of the bolting information. In particular, the bolting information can include torque information and / or angle of rotation information.

[0046] For example, when creating the screwing information in step v), a current screw position of the screw connection can also be taken into account, so that the screwing information can include information on a number of further necessary screw turns.

[0047] In particular, the creation of the bolting information in step v) can consist of the connection pressure information and the predetermined target surface pressure. The term "target surface pressure," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to a desired surface pressure between at least two opposing surfaces. For example, the target surface pressure of the flange connection can correspond to a surface pressure of the connecting surfaces that is required, preferably distributed as uniformly as possible over the circumference of a seal arranged between the surfaces, for example, a sealing ring, in order to create a tight flange connection.For example, the target surface pressure can be a range within which the flange connection is leak-tight, thus preventing the escape of fluid from the pipe and avoiding damage to the flange connection, such as to the flange material. In particular, the target surface pressure can be a predefined range within which the actual surface pressure of the flange connection should lie to ensure a leak-tight connection. The target surface pressure can be specified, for example, as a range with a permissible tolerance of ±10%, in particular ±5%, or ±3%. Specifying the target surface pressure as a range with a permissible tolerance can be particularly useful for accommodating measurement errors, such as those of the tool and / or pressure sensors.

[0048] The actual surface pressure and / or the actual surface pressure of the flange connection can depend in particular on a pressure between the two connecting surfaces, for example sealing surfaces, which in turn can be generated by the screw connections.

[0049] For example, step v) may include: creating the bolting information for each of the at least two bolted connections from a comparison of the connection pressure information with the predetermined target surface pressure, taking into account the number of bolted connections.

[0050] For example, step v) of the bolting process can include generating bolting information for each of the bolted connections of the flange connection from the predetermined and / or specified target surface pressure, particularly by means of the control system. The control system can, for example, be configured to determine a desired normal force for each of the bolted connections and, from this, also by the control system, to derive the bolting information, i.e., for example, torque information and / or angle information. For example, based on the predetermined target surface pressure P A , for example a lower limit of a range of the predetermined target surface pressure, as well as a common contact area A of seal and sealing surfaces, in particular the connection surface of the flange connection, via the relationship p - F 3 es Pa ~ A a desired total normal force F ges be determinable. P can be determined in this context. Afor example, surface pressure in [N / m²] 2 ], F ges for example the total normal force in [N] and A of the contact area between seal and sealing surface in [m²] 2 ] are equivalent to.

[0051] The total normal force F aes It is composed of the normal forces of the individual screw connections. The following relationship applies:

[0052] Where F s can correspond to the normal force of a single bolted connection. The normal force F s The normal force F of a single bolted joint can be generated, in particular, by the elastic deformation of the bolted joint, for example, by stretching and compressing the elements of the bolted joint. s especially via the contact area A sa single screw connection between its screw head, its nut and / or its washer with the flange or flange counterpart, for example with the flange ring.

[0053] The pressure sensors are arranged between the side of the flange facing away from the flange counterpart and its respective screw connection, for example between the flange ring and the screw connection, e.g., a screw head, nut and / or washer, and determine the connection pressure information, for example the pressure P generated by this screw connection. s , for the respective screw connection. Regarding the connection The desired normal force for each of the screw connections can be determined by the control system and, also by the control system, converted into the screwing information, i.e., for example, into torque information and / or rotation angle information.

[0054] Step vi) may, for example, include at least one of the following sub-steps:

[0055] Applying the power tool to one of the screw connections;

[0056] Transferring the screw connection information to the electric tool, in particular for the screw connection to which the electric tool is attached;

[0057] Tightening the screw connection according to the tightening information, using the electric tool, for example by automated control of the electric tool, in particular the torque transmission of the torque wrench.

[0058] In particular, the electric tool, for example an electric and / or electronic screwdriver as described above, can include, in particular, an electronic tool. For example, the electric tool can be a power-assisted tool that uses at least one form of power transmission: electricity, pneumatics, or hydraulics. For example, the power generation of the electric tool can be electrical and / or by a motorized compressor. Alternatively or additionally, the control of the electric tool can be electrical, for example, by means of at least one electronic component.

[0059] In particular, the procedure can include repeating step vi) for each of the bolted connections of the flange connection. For example, step vi), including its sub-steps, can be performed for each of the bolted connections of the flange connection.

[0060] In a further aspect of the present invention, a computer program is proposed comprising instructions which, when the computer program is executed on a computer, in particular on the controller of the flange connection according to the invention, cause the computer, in particular the controller, to execute at least steps iii), iv) and v) of the method according to the invention for bolting at least two bolted connections of a flange connection according to the invention. In particular, the computer program can include instructions which, when the computer program is executed on the controller of the flange connection according to the invention, cause the controller to execute at least steps iii), iv) and v) of the bolting method.Furthermore, the present invention proposes a computer program with program code means to carry out the screwing method according to the invention in one of its embodiments when the program is executed on a computer or computer network, for example on the control unit of the flange connection. In particular, the program code means can be stored on a computer-readable medium, for example on a computer-readable data carrier and / or a computer-readable storage medium.

[0061] In another aspect of the present invention, a computer-readable medium is proposed on which the computer program for carrying out at least steps ii), iv) and v) of the screwing process is stored.

[0062] The term "computer-readable medium," as used here, can refer in particular to a non-transitory data storage medium, such as a hardware data storage medium on which computer-executable instructions are stored. The computer-readable medium can be, in particular, a storage medium such as random-access memory (RAM) and / or read-only memory (ROM).

[0063] In a further aspect of the present invention, a method for automatically verifying the integrity of at least one flange connection according to the invention is proposed, for example, according to one or more of the embodiments described above and / or according to one or more of the embodiments described in more detail below. The method for automatically verifying the integrity of at least one flange connection according to the invention may also be referred to herein as the "verification method." The method comprises the steps described in more detail below. These steps can be performed in the sequence mentioned. However, a different sequence is also possible in principle. Furthermore, two or more of the method steps mentioned can be performed overlapping in time or simultaneously. Furthermore, one or more of the method steps mentioned can be performed once or repeatedly.The procedure may include further procedural steps beyond those mentioned, which are not listed.

[0064] The verification procedure comprises the following steps: a) Providing at least one flange connection; b) Determining the connection pressure information for at least two of the bolted connections using at least two pressure sensors; c) Transmitting the connection pressure information to the controller using at least one interface of the pressure sensors; d) Evaluating the connection pressure information and generating at least one integrity information report on the integrity of the flange connection using the controller.

[0065] Since the flange connection is the flange connection according to the invention in accordance with one or more of the embodiments described above and / or in accordance with one or more of the embodiments described in more detail below, reference is made to the explanations relating to the flange connection with regard to definitions of terms and embodiments.

[0066] The term "integrity information," as used here, is a broad term to which its ordinary and common meaning, as understood by those skilled in the art, should be attributed. The term is not limited to any specific or adapted meaning. Without limitation, the term can refer in particular to state information, for example, information about the condition of the flange connection. Specifically, the integrity information can be Boolean information indicating, for example, "integer" / "tight" or "not integer" / "leaking." Thus, the integrity information can be determined, for example, from the connection pressure information, especially together with information about at least one property of the fluid carried in the line designed for fluid transport, such as pressure and / or viscosity.For example, as soon as the connection pressure information at a bolted joint indicates that a predefined minimum pressure has been undershot—that is, the pressure exerted by this bolt on the pressure sensor is less than a threshold value corresponding to the minimum pressure—the integrity information can be determined as "not integer" or "leaking." Conversely, the integrity information can only be determined as "integer" or "tight" if the predefined minimum pressure is present at all bolted joints of the flange connection equipped with a pressure sensor.The creation of integrity information by means of the control system can, for example, be carried out by determining whether at least a specified minimum pressure is present at all screw connections equipped with a pressure sensor, whereby the minimum pressure can be fixed or can be variably adjustable, for example by specialist personnel, in particular via an interface of the control system, for example via the human-machine interface.

[0067] In particular, the control system can, for example, determine the integrity information as "not integer" or "leaking" and give a corresponding signal, for example via its interface, as soon as it can be concluded from the connection pressure information and at least one property of the fluid.

[0068] In particular, step a) may, for example, include assigning the bolted connections to the respective through-holes. For example, step a) may, in particular, include inserting at least one of the elements involved in the respective bolted connection through the respective through-hole, at least of the flange.

[0069] For example, step d) may include comparing the connection pressure information with a predetermined target surface pressure. The target surface pressure may be the same target surface pressure as in the screwing method according to the invention, so that with regard to the meaning of the term "target surface pressure" reference is made to the definition as given in relation to the screwing method.

[0070] The verification procedure may further include the following step: e) Creating at least one maintenance information based on the integrity information, where the maintenance information is positive, for example, "maintenance required", as soon as the integrity information identifies the flange connection as "not integer" and the maintenance information is negative, for example, "maintenance not (yet) necessary", as long as the integrity information identifies the flange connection as "integer".

[0071] In particular, if the maintenance information is positive, the verification procedure may further include the following step: f) Creating a bolting information based on the connection pressure information and a predetermined target surface pressure, using the control.

[0072] The screwing information can be the same screwing information as in the screwing method according to the invention, so that with regard to the meaning of the term "screwing information" reference is made to the definition as given in relation to the screwing method.

[0073] In particular, the tightening information can be torque information and / or angle information. For example, when generating the tightening information in step f), the current screw position of the bolted joint can also be taken into account, so that the tightening information can include information on the number of additional, necessary screw turns. For example, step f) can include the following sub-step:

[0074] Creating the screw connection information for each of the at least two screw connections from a comparison of the connection pressure information with the predetermined target surface pressure, taking into account the number of screw connections.

[0075] For example, step f) of the verification procedure can be analogous to and / or proceed like step v) of the bolting procedure, i.e., in particular, it can include generating bolting information for each of the bolted connections of the flange connection from the predetermined and / or specified target surface pressure, especially by means of the control system. For example, with regard to an embodiment of step f), reference is made to the embodiment of step v) as described in relation to the bolting procedure.

[0076] The verification procedure may further include the following step: (g) providing the bolting information, by means of the control, in particular by means of at least one interface, for example a transmission device, of the control to at least one of: an output unit, for example a display; a database, for example a lookup table and / or a specification; an electric tool, for example an electric screwdriver, in particular an electric torque wrench.

[0077] The verification procedure may further include the following steps: h) providing at least one electric tool for tightening screw connections, in particular an electric torque wrench; and j) tightening the screw connections in accordance with the tightening information using the electric tool.

[0078] Step j) of the verification procedure may in particular include the following sub-steps: applying the electrical tool to one of the screw connections;

[0079] Transferring the screw connection information to the electric tool, in particular for the screw connection to which the electric tool is attached;

[0080] Tightening the bolted connection according to the tightening information, using the electric tool, for example by automated control of the electric tool, in particular the torque transmission of the torque wrench. In particular, the verification procedure can include repeating step j) for each of the bolted connections of the flange connection. For example, step j), including its sub-steps, can be performed for each of the bolted connections of the flange connection.

[0081] In a further aspect of the present invention, a computer program is proposed comprising instructions which, when the computer program is executed on a computer, in particular on the controller of the flange connection according to the invention, cause the computer, in particular the controller, to execute at least steps b), c) and d), and optionally one or more of steps e), f), g) and j), of the method according to the invention for bolting at least two bolted connections of a flange connection according to the invention, in particular the verification method. In particular, the computer program can include instructions which, when the computer program is executed on the controller of the flange connection according to the invention, cause the controller to execute at least steps b), c) and d), and optionally one or more of steps e), f), g) and j), of the verification method.In a further aspect of the present invention, a computer-readable medium is proposed on which the computer program for carrying out at least steps b), c) and d), and optionally one or more of steps e), f), g) and j), of the verification procedure is stored.

[0082] The proposed flange connection for at least one fluid-carrying line, as well as the proposed methods, computer programs, and computer-readable media, offer numerous advantages over known devices and methods of this type. In particular, for example, welds on the line can cause distortions and / or deformations, which increase the susceptibility to leaks at flange connections located on the line. The proposed flange connection and the proposed methods can, for example, prevent such leaks or at least detect them early. The control system of the flange connection can, for instance, be configured to account for distortions and / or deformations when calculating and / or determining the tightening information.For example, bolted connections on opposing through-holes can be tightened to different torques to compensate for distortion and / or deformation and to ensure uniform surface pressure on the flange connection, particularly on the mating surfaces. Furthermore, the proposed devices and methods can increase overall efficiency. For instance, production downtime can be avoided or at least reduced. In particular, the early detection of minor leaks, which can be rectified during operation, for example by retightening individual bolted connections, can be suitable for minimizing or completely preventing downtime.Furthermore, the proposed devices and procedures can reduce the burden on installation and control personnel and significantly reduce the workload, which can also lead to increased efficiency.

[0083] In summary, without limiting further possible embodiments, the following embodiments are proposed:

[0084] Embodiment 1. Flange connection for at least one line designed to carry fluid, in particular for connecting at least two lines designed to carry fluid, comprising a flange and a flange counterpart, wherein the flange has at least two through-openings; at least one control;at least two pressure sensors for determining, in particular measuring, at least one connection pressure information, comprising at least one interface for transmitting the connection pressure information to the control system, wherein the pressure sensors are arranged such that they each at least partially surround an edge of at least one of the at least two through-holes of the flange on a side of the flange facing away from the flange counterpart, at least two screw connections provided for mechanically fixing the pressure sensors to the flange and the flange relative to the flange counterpart, wherein the screw connections each pass through one of the through-holes of the flange.

[0085] Embodiment 2. Flange connection according to the preceding embodiment, wherein the number of pressure sensors is equal to the number of screw connections.

[0086] Embodiment 3. Flange connection according to one of the preceding embodiments, wherein the flange has at least four through-openings, and wherein the flange connection comprises at least four bolted connections which pass through the through-openings of the flange. Embodiment 4. Flange connection according to one of the preceding embodiments, wherein the pressure sensors completely enclose the edge of the through-openings, in particular the through-openings through which a bolted connection is passed.

[0087] Embodiment 5. Flange connection according to one of the preceding embodiments, wherein the pressure sensors are at least partially ring-shaped.

[0088] Embodiment 6. Flange connection according to one of the preceding embodiments, wherein the pressure sensors comprise at least one pressure sensor selected from the group consisting of: diaphragm pressure sensor; film-based pressure sensor, in particular film pressure sensor, for example printed film sensor, in particular as part of printed electronics; piezoelectric thin-film sensor; organic field-effect transistor (OFET), for example in printed electronics; thick-film pressure sensor.

[0089] Embodiment 7. Flange connection according to one of the preceding embodiments, further comprising at least one protective layer, wherein at least one of the at least two pressure sensors is arranged between the at least one protective layer and the side of the flange facing away from the flange counterpart, wherein the protective layer is designed in particular to protect the pressure sensor from at least one frictional force, for example exerted by at least one of the screw connections.

[0090] Embodiment 8. Flange connection according to the preceding embodiment, wherein the protective layer has a number of through-openings, the number and position of the through-openings corresponding to the number and position of the bolted connections, and in particular the through-openings of the flange.

[0091] Embodiment 9. Flange connection according to one of the two preceding embodiments, wherein the protective layer comprises at least one stable material that is lubricating on its surface, for example a material selected from the group consisting of metal or metal alloys, for example steel, nickel, brass, or similar metals or metal alloys, and carbon.

[0092] Embodiment 10. Flange connection according to one of the preceding embodiments, wherein at least one seal, in particular a sealing ring, is arranged between the flange and the flange counterpart, for example concentrically to the line provided for fluid conveyance. Embodiment 11. Flange connection according to one of the preceding embodiments, wherein the flange counterpart is designed as a second flange.

[0093] Embodiment 12. Flange connection according to the preceding embodiment, wherein the second flange is mirror-symmetrical to the first flange.

[0094] Embodiment 13. Flange connection according to one of the preceding embodiments, wherein the at least one line provided for fluid guidance has a weld seam, in particular a fastening weld seam, for example a weld seam by which the line is attached to at least one element, for example to the flange of the flange connection or to another flange.

[0095] Embodiment 14. Flange connection according to one of the preceding embodiments, wherein the at least one line provided for fluid guidance which is connected by the flange connection is provided to guide at least one fluid from a chemical process in the chemical industry.

[0096] Embodiment 15. Flange connection according to one of the preceding embodiments, wherein the line provided for fluid conveyance is connected on at least one side to a device, wherein the device is selected from the group consisting of: column, tank, measuring instrument, valve, fitting and similar components and / or elements.

[0097] Embodiment 16. Flange connection according to the preceding embodiment, wherein the device, for example the column, is part of a production plant in the chemical industry.

[0098] Embodiment 17. Method for tightening at least two bolted connections of a flange connection according to one of the preceding embodiments, comprising: i) providing the at least one flange connection; ii) providing at least one tool for tightening bolted connections, in particular a screwdriving tool, for example a torque wrench; iii) determining the connection pressure information for at least two of the bolted connections by means of the at least two pressure sensors; iv) transmitting the connection pressure information to the controller by means of the at least one interface of the pressure sensors; v) generating tightening information based on the connection pressure information and a predetermined target surface pressure by means of the controller; vi) tightening the bolted connections according to the tightening information by means of the tool.

[0099] Embodiment 18. Method according to the preceding embodiment, wherein the screwing information is torque information and / or rotation angle information.

[0100] Embodiment 19. Method according to one of the two preceding embodiments, wherein step v) comprises: generating the screwing information for each of the at least two screw connections from a comparison of the connection pressure information with the predetermined target surface pressure, taking into account the number of screw connections.

[0101] Embodiment 20. Method according to one of the three preceding embodiments, wherein step vi) comprises:

[0102] Applying the power tool to one of the screw connections;

[0103] Transferring the screw connection information to the electric tool, in particular for the screw connection to which the electric tool is attached;

[0104] Tightening the screw connection according to the tightening information, using the electric tool, for example by automated control of the electric tool, in particular the torque transmission of the torque wrench.

[0105] Embodiment 21. Method according to one of the four preceding embodiments, comprising repeating step vi) for each of the bolted connections of the flange connection.

[0106] Embodiment 22. Computer program comprising instructions which, when the computer program is executed on a computer, in particular on the control of the flange connection, cause the computer, in particular the control, to execute at least steps iii), iv) and v) of the method according to one of the preceding embodiments directed to a method.

[0107] Embodiment 23. Computer-readable medium on which the computer program according to the preceding embodiment is stored.

[0108] Embodiment 24. Method for automatically checking the integrity of at least one flange connection according to one of the preceding embodiments directed at a flange connection, comprising: a) providing the at least one flange connection; b) determining the connection pressure information for at least two of the bolted connections by means of the at least two pressure sensors; c) transmitting the connection pressure information to the controller by means of the at least one interface of the pressure sensors; d) evaluating the connection pressure information and generating at least one integrity information about the integrity of the flange connection by means of the controller.

[0109] Embodiment 25. Method according to the preceding embodiment, wherein step d) comprises comparing the connection pressure information with a predetermined target surface pressure.

[0110] Embodiment 26. Method according to one of the two preceding embodiments, further comprising e) generating at least one maintenance information based on the integrity information, wherein the maintenance information is positive, for example “maintenance required”, as soon as the integrity information identifies the flange connection as “not integer” and the maintenance information is negative, for example “maintenance not (yet) required”, as long as the integrity information identifies the flange connection as “integer”.

[0111] Embodiment 27. Method according to the preceding embodiment, wherein, if the maintenance information is positive, the method further comprises: f) generating a screw-in information based on the connection pressure information and a predetermined target surface pressure, by means of the control.

[0112] Embodiment 28. Method according to the preceding embodiment, wherein the screwing information is torque information and / or rotation angle information.

[0113] Embodiment 29. Method according to one of the two preceding embodiments, wherein step f) comprises: generating the screwing information for each of the at least two screw connections from a comparison of the connection pressure information with the predetermined target surface pressure, taking into account the number of screw connections.

[0114] Embodiment 30. Method according to one of the three preceding embodiments, further comprising: g) providing the screwing information, by means of the control, in particular by means of at least one interface, for example a transmission device, of the control, to at least one of: an output unit, for example a display; a database, for example a lookup table and / or a specification; an electric tool, in particular an electric torque wrench.

[0115] Embodiment 31. Method according to the preceding embodiment, further comprising: h) providing the at least one electric tool for tightening screw connections, in particular an electric torque wrench; j) tightening the screw connections according to the tightening information using the electric tool.

[0116] Embodiment 32. Method according to the preceding embodiment, wherein step j) comprises:

[0117] Applying the power tool to one of the screw connections;

[0118] Transferring the screw connection information to the electric tool, in particular for the screw connection to which the electric tool is attached;

[0119] Tightening the screw connection according to the tightening information, using the electric tool, for example by automated control of the electric tool, in particular the torque transmission of the torque wrench.

[0120] Embodiment 33. Method according to one of the two preceding embodiments, comprising repeating step j) for each of the bolted connections of the flange connection.

[0121] Embodiment 34. Computer program comprising instructions which, when the computer program is executed on a computer, in particular on the control of the flange connection, cause the computer, in particular the control, to execute at least steps b), c) and d), and optionally one or more of steps e), f), g) and j) of the method according to one of embodiments 24 to 33.

[0122] Embodiment 35. Computer-readable medium on which the computer program according to the preceding embodiment is stored. Brief description of the figures

[0123] Further details and features will become apparent from the following description of exemplary embodiments, particularly in conjunction with the dependent claims. The respective features can be implemented individually or in combination with one another. The invention is not limited to the exemplary embodiments. The exemplary embodiments are shown schematically in the figures. Identical reference numerals in the individual figures denote identical or functionally equivalent elements, or elements that correspond to one another with respect to their functions.

[0124] Specifically, we show:

[0125] Figure 1 shows an embodiment of a flange connection in a perspective view;

[0126] Figure 2 shows an embodiment of a flange connection in a sectional view;

[0127] Figure 3 shows part of an embodiment of a flange connection in a perspective view;

[0128] Figure 4 shows a flowchart of an embodiment of a method for bolting at least two bolted connections of a flange connection; and

[0129] Figure 5 shows a flowchart of an embodiment of a method for automatically checking the integrity of at least one flange connection.

[0130] Description of the exemplary implementations

[0131] Figures 1, 2, and 3 show different embodiments of a flange connection 110 according to the invention, or parts thereof, in perspective view (Figures 1 and 3) and in sectional view (Figure 2). The flange connection 110 is configured for at least one fluid-conducting line 112. In particular, the fluid-conducting line 112 can be a continuous line 112 or two lines 112 connected to each other by the flange connection 110. The flange connection 110 can thus be configured, in particular, to connect at least two fluid-conducting lines 112. The flange connection 110 comprises a flange 114 and a flange counterpart 116, wherein the flange 114 has at least two through-openings 118. The flange 114 and the flange counterpart 116 can, for example, be symmetrically designed.However, different designs of the flange 114 and the flange counterpart 116 are also fundamentally possible.

[0132] Furthermore, the flange connection 110 has at least one control unit 120 and at least two pressure sensors 122 for determining at least one connection pressure information, such as a pressure reading. At least one of the pressure sensors 122, preferably both pressure sensors 122, includes at least one interface 124 for transmitting the connection pressure information to the control unit 120. The pressure sensors 122 are arranged such that they each at least partially surround an edge 126 of at least one of the at least two through-openings 118 of the flange 114 on a side of the flange 114 facing away from the flange counterpart 116. The pressure sensors 122 can, for example, be fork-shaped or ring-shaped. Other configurations of the pressure sensors 122 are also possible.An example of a fork-shaped design of the pressure sensor is illustrated in the upper part of Figure 1 and in the upper part of Figure 2, while an example of a ring-shaped design is shown in the lower part of Figure 1, in the lower part of Figure 2 and in Figure 3.

[0133] Furthermore, the flange connection 110 comprises at least two screw connections 128 designed for mechanically fixing the pressure sensors 122 to the flange 114 and the flange 114 relative to the flange counterpart 116. For clarity, only a single screw connection 128 is illustrated in Figure 1, and none in Figure 3. The screw connections 128 each pass through one of the through-holes 118 of the flange 114. The number of pressure sensors 122 can, for example, be equal to the number of screw connections 122. In particular, the number of through-holes 118 can also be equal to the number of pressure sensors 122 and / or the number of screw connections 122. The screw connections 122 can, for example, comprise at least two elements: a screw 130, a nut 132, and a threaded stud 134. Other configurations of the screw connection 122 are also possible.

[0134] The flange connection 110 can further comprise at least one protective layer 136. In particular, at least one of the at least two pressure sensors 122 can be arranged between the at least one protective layer 136 and the side of the flange 114 facing away from the flange counterpart 116, wherein the protective layer 136 is designed, in particular, to protect the pressure sensor 122 from at least one frictional force, for example, exerted by at least one of the bolted connections 128. The protective layer 136 can, in particular, comprise a stable material that is at least slippery on its surface, for example, be made of this material.In particular, for example, the side of the protective layer 136 facing the pressure sensors 122 can be slippery to allow the pressure sensors 122 to slide easily over the surface of the protective layer 136 when the protective layer 136 moves, whereas a side of the protective layer 136 facing away from the pressure sensors 122 can, for example, be non-slip, in particular even roughened, to prevent, for example, the screw connections 128 from loosening on their own.

[0135] For example, the protective layer 136 can have a number of through-openings 138, the number and position of which can correspond to the number and position of the screw connections 122, and in particular to the through-openings 118 of the flange 144. In Figure 1, the protective layer 136 is shown only in a cutaway view at the locations where the pressure sensors 122 are arranged, in order to provide a clearer overview.

[0136] Furthermore, the flange connection 110 can, for example, include a seal 138, wherein the seal 138 can be arranged, in particular, between the flange 114 and the flange counterpart 116, for example, in a groove. The seal 138 can, in particular, be designed as a sealing ring. Alternatively, the seal 138 can also be formed integrally with a flange 114 and a flange counterpart 116, for example, by a design of a connecting surface of at least one of the flange 114 and the flange counterpart 116 as a connecting surface with a sealing function. The seal 138 can, in particular, be positioned concentrically to the line 112 provided for fluid guidance, i.e., arranged, for example, concentrically around a flange axis 140.

[0137] Figure 4 shows a flowchart of an embodiment of a method, in particular designated as a bolting method 142, for bolting at least two bolted connections 128 of a flange connection 110 according to the invention. The method comprises the following steps: i) (identified by reference numeral 144) providing the at least one flange connection 110; ii) (identified by reference numeral 146) providing at least one tool for bolting the bolted connections 128, in particular a bolting tool, for example a torque wrench; iii) (identified by reference numeral 148) determining the connection pressure information for at least two of the bolted connections 128, by means of the at least two pressure sensors 122; iv) (identified by reference numeral 150) transmitting the connection pressure information to the controller 120, by means of the at least one interface 124 of the pressure sensors 122;v) (identified by reference numeral 152) Creating a screwing information based on the connection pressure information and a predetermined target surface pressure, using the control 120; vi) (identified by reference numeral 154) Tightening the screw connections 128 according to the screwing information using the tool.;

[0138] Figure 5 shows a flowchart of an embodiment of a method, in particular designated as verification method 156, for the automated verification of the integrity of at least one flange connection 110 according to the invention. The method comprises the following steps: a) (identified by reference numeral 158) providing the at least one flange connection 110; b) (identified by reference numeral 160) determining the connection pressure information for at least two of the bolted connections 128, using the at least two pressure sensors 122; c) (identified by reference numeral 162) transmitting the connection pressure information to the controller 120, using the at least one interface 124 of the pressure sensors 122; d) (identified by reference numeral 164) evaluating the connection pressure information and generating at least one integrity information report on the integrity of the flange connection 110, using the controller 120.

[0139] List of reference signs

[0140] flange connection

[0141] Line

[0142] flange

[0143] Flange counterpart

[0144] Passageways

[0145] steering

[0146] Pressure sensor

[0147] interface

[0148] edge

[0149] screw connection

[0150] screw

[0151] Mother

[0152] Threaded pin

[0153] protective layer

[0154] seal

[0155] Flange axle

[0156] Screw fastening method

[0157] Step i)

[0158] Step ii)

[0159] Step iii)

[0160] Step iv)

[0161] Step v)

[0162] Step vi)

[0163] Verification procedure

[0164] Step a)

[0165] Step b)

[0166] Step c)

[0167] Step d)

Claims

Claims 1. Flange connection (110) for at least one line (112) designed for fluid conveyance, comprising a flange (114) and a flange counterpart (116), wherein the flange (114) has at least two through-openings (118); at least one control (120);at least two pressure sensors (122) for determining at least one connection pressure information, comprising at least one interface (124) for transmitting the connection pressure information to the control unit (120), wherein the pressure sensors (122) are arranged such that they each at least partially surround an edge (126) of at least one of the at least two through-holes (118) of the flange (114) on a side of the flange (114) facing away from the flange counterpart (116), at least two screw connections (128) provided for mechanically fixing the pressure sensors (122) to the flange (114) and the flange (114) relative to the flange counterpart (116), wherein the screw connections (128) each pass through one of the through-holes (118) of the flange (114).

2. Flange connection (110) according to the preceding claim, wherein a number of pressure sensors (122) is equal to a number of screw connections (128).

3. Flange connection (110) according to one of the preceding claims, wherein the flange (114) has at least four through-openings (118), and wherein the flange connection (110) comprises at least four screw connections (128) which are guided through the through-openings (118) of the flange (114).

4. Flange connection (110) according to one of the preceding claims, wherein the pressure sensors (122) completely enclose the edge (126) of the through-openings (118), wherein the pressure sensors (122) are at least partially annular in shape.

5. Flange connection (110) according to one of the preceding claims, further comprising at least one protective layer (136), wherein at least one of the at least two pressure sensors (122) is arranged between the at least one protective layer (136) and the side of the flange (114) facing away from the flange counterpart (116), wherein the protective layer (136) has a number of through-openings (138), wherein the number and position of the through-holes (138) correspond to the number and position of the screw connections (122).

6. Flange connection (110) according to one of the preceding claims, wherein at least one seal (138) is arranged between the flange (114) and the flange counterpart (116).

7. A method for tightening at least two screw connections (128) of a flange connection (110) according to any one of the preceding claims, comprising: i) providing the at least one flange connection (110); ii) providing at least one tool for tightening screw connections (128); iii) determining the connection pressure information for at least two of the screw connections (128) by means of the at least two pressure sensors (122); iv) transmitting the connection pressure information to the controller (120) by means of the at least one interface (124) of the pressure sensors (122); v) generating tightening information based on the connection pressure information and a predetermined target surface pressure by means of the controller (120); vi) tightening the screw connections (128) according to the tightening information by means of the tool.

8. Method according to the preceding claim, wherein step v) comprises: generating the screwing information for each of the at least two screw connections (128) from a comparison of the connection pressure information with the predetermined target surface pressure taking into account the number of screw connections (128).

9. Method according to one of the two preceding claims, wherein step vi) comprises: Positioning the electric tool on one of the screw connections (128); transferring the screw tightening information to the electric tool; Tighten the screw connection (128) according to the screwing information, using the electric tool.

10. Method for automated verification of the integrity of at least one flange connection (110) according to any of the preceding claims directed to a flange connection (110), comprising a) providing the at least one flange connection (110); b) Determining the connection pressure information for at least two of the bolted connections (128) using at least two pressure sensors (122); c) Transmitting the connection pressure information to the controller (120) using at least one interface (124) of the pressure sensors (122); d) Evaluating the connection pressure information and generating at least one integrity information about the integrity of the flange connection (110) using the controller (120).

11. Method according to the preceding claim, wherein step d) comprises comparing the connection pressure information with a predetermined target surface pressure.

12. Method according to one of the two preceding claims, further comprising e) generating at least one maintenance information based on the integrity information, wherein the maintenance information is positive as soon as the integrity information identifies the flange connection (110) as “not integer” and the maintenance information is negative as long as the integrity information identifies the flange connection (110) as “integer”.

13. Method according to the preceding claim, wherein if the maintenance information is positive the method further comprises: f) generating a screw connection information based on the connection pressure information and a predetermined target surface pressure, by means of the control (120), wherein the generation of the screw connection information for each of the at least two screw connections (128) is carried out from a comparison of the connection pressure information with the predetermined target surface pressure, taking into account the number of screw connections (128).

14. Method according to the preceding claim, further comprising: g) providing the screwing information by means of the control (120) to at least one of: an output unit; a database; an electric tool.

15. Method according to the preceding claim, further comprising: h) providing the at least one electric tool for tightening screw connections (128); j) Tighten the screw connections (128) according to the tightening information using the electric tool.

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