EP0232527B1 - Device for flow-control in a heat-exchanger tube - Google Patents

Device for flow-control in a heat-exchanger tube Download PDF

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Publication number
EP0232527B1
EP0232527B1 EP86117624A EP86117624A EP0232527B1 EP 0232527 B1 EP0232527 B1 EP 0232527B1 EP 86117624 A EP86117624 A EP 86117624A EP 86117624 A EP86117624 A EP 86117624A EP 0232527 B1 EP0232527 B1 EP 0232527B1
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EP
European Patent Office
Prior art keywords
upstream
tube
insert
orifice
downstream
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Expired
Application number
EP86117624A
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German (de)
French (fr)
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EP0232527A1 (en
Inventor
Jean Andro
Jacques Marjollet
Francois Carpentier
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Stein Industrie SA
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Stein Industrie SA
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Publication of EP0232527A1 publication Critical patent/EP0232527A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0282—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by varying the geometry of conduit ends, e.g. by using inserts or attachments for modifying the pattern of flow at the conduit inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/18—Inserts, e.g. for receiving deposits from water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/62—Component parts or details of steam boilers specially adapted for steam boilers of forced-flow type
    • F22B37/70—Arrangements for distributing water into water tubes
    • F22B37/74—Throttling arrangements for tubes or sets of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
    • F28F19/002—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using inserts or attachments

Definitions

  • the present invention relates to a device for controlling the flow in a heat exchanger tube traversed by a vapor, comprising an insert fixed in a region of the end of the exchanger tube or of the orifice of the tubular plate corresponding to this tube, and a disc with calibrated orifice, of erosion-corrosion resistant metal, fixed inside the insert, the latter comprising a tubular element upstream of the disc with calibrated orifice, and a tubular element in downstream of this disc over a significant length.
  • Such devices are used in particular to control the distribution of the flow between the tubes of a tube bundle of heat exchange, when it is desired to pass in some of the tubes a flow less than in other tubes, the amount of heat transferred through the first tubes to be less than through the others depending on the flow rate or the temperature of the fluid passing in contact with the external surface of the tubes.
  • This case arises in particular in heat exchangers in which steam of heating water under high pressure circulates in a tubular bundle in several successive passes, in exchange for heat with a fluid first relatively cold, then partially reheated .
  • the metal of the insert must have specific characteristics allowing easy expansion in the tube of the bundle or in the hole of the tube plate corresponding to this tube, and have a coefficient of expansion close to that of the exchange tube in order to avoid dedudging under the effect of temperature cycling. It must also have good resistance to erosion-corrosion by wet steam at the outlet of the calibrated orifice due to the turbulence due to the high speeds reached in the orifice. Only very expensive alloys have all of these properties.
  • Such a device necessarily comes to form a pronounced projection on the end of the tube beyond the tube plate, which makes it susceptible in the long term to separation of the tube under the effect of vibrations and to erosion-corrosion by the vapor entering the tube bundle of which the tube is a part.
  • the object of the present invention is to provide a flow control device which is easy to fix in the heat exchange tube or the hole in the corresponding tube plate, but which also has excellent resistance to erosion. corrosion.
  • the insert of the device according to the invention is characterized in that it is expanded in the region of the end of the exchanger tube or of the orifice of the tube plate, in that its upstream tubular element is in one metal with a low elastic limit but with a high elastic elongation rate, and in that its downstream tubular element is made of an erosion-corrosion-resistant metal, of length at least equal to 10 times its internal diameter, and ending with an external sharp edge bevel and angle less than 15 ° .
  • the end of the heat exchange tube 2 is fixed in an orifice of the tube plate 1 and welded at 3 by its end edge thereon.
  • the die control device bit 4 consists of an upstream part 5 and a downstream part 6, welded to each other and to the disc 7, drilled with a calibrated bore 8.
  • the upstream element is made of steel with low elastic limit , but with a high coefficient of elastic elongation, for example in carbon steel of the Tu 42 grade.
  • the downstream element of the device is made of a steel resistant to erosion-corrosion by water vapor, for example one of the steels known under the designations Z2 CN 18-10 or Z2 CT 18.
  • Its thickness is slightly less than that of the upstream element. Its length is greater than at least 10 times its internal diameter, so that it cannot appear erosion-corrosion phenomena due to the flow of water vapor at the outlet of the orifice of the disc on the wall internal of the tube, due to the pressure drop of the water vapor when passing through the calibrated orifice, and it ends in a bevel 12 of external sharp edge and of angle less than 15 ° , ensuring a laminar flow in contact with the wall of the tube.
  • the disc 7 with calibrated orifice 8 is also made of a steel resistant to erosion-corrosion by water vapor, for example steel Z2 CN 18-10.
  • the upstream and downstream elements and the calibrated orifice disc are welded together by a weld bead 11, this weld appearing on an enlarged scale in FIG. 5, where it can be seen that the ends of the upstream and downstream elements abut on a circumferential bead of the disc 7.
  • FIG. 2 represents a device similar to that of FIG. 1, but in which the extreme edge of its upstream element is fixed on the internal periphery of the tube by a weld bead 13, so as to avoid sliding of the device when inside the tube in case the fastening by expansion in zone 9 breaks.
  • FIG. 3 represents a device similar to that of FIG. 1, but in which the tube 14 does not penetrate into the tubular plate 1, on the downstream face of which it is welded by a weld bead 15. This is then the flow control device itself which is expanded in its zone 9 in the tube plate, and welded thereto on its extreme edge by the weld bead 13.
  • FIG. 4 represents a device similar to that of FIG. 1, but in which the insert is welded by its upstream edge to the weld bead joining the edge of the tube to the tubular plate, thus forming a common weld bead 13A .
  • This provides much better accessibility for welding the edge of the insert, which facilitates the execution and control of this welding.
  • FIG. 6 represents a variant of the mutual fixing of the upstream 5 and downstream 6 elements and of the device 7 with orifice calibrated by a weld bead 11 A of the upstream element on the disc 7, and a bead of welding 11 A of the downstream element on this same disc.
  • FIG. 7 represents a variant of the mutual fixing between the upstream and downstream elements and the disc with calibrated orifice, in which the ends of the two elements are crimped at 16 and 17 respectively on the disc 7.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Pipe Accessories (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Measuring Volume Flow (AREA)

Description

La présente invention concerne un dispositif de contrôle de débit dans un tube d'échangeur de chaleur parcouru par une vapeur, comprenant un insert fixé dans une zone de l'extrémité du tube d'échangeur ou de l'orifice de la plaque tubulaire correspondante à ce tube, et un disque à orifice calibré, en métal résistant à l'érosion-corrosion, fixé à l'intérieur de l'insert, celui-ci comprenant un élément tubulaire en amont du disque à orifice calibré, et un élément tubulaire en aval de ce disque sur une longueur importante.The present invention relates to a device for controlling the flow in a heat exchanger tube traversed by a vapor, comprising an insert fixed in a region of the end of the exchanger tube or of the orifice of the tubular plate corresponding to this tube, and a disc with calibrated orifice, of erosion-corrosion resistant metal, fixed inside the insert, the latter comprising a tubular element upstream of the disc with calibrated orifice, and a tubular element in downstream of this disc over a significant length.

De tels dispositifs servent notamment à contrôler la répartition du débit entre les tubes d'un faisceau tubulaire d'échange de chaleur, lorsque l'on désire faire passer dans certains des tubes un débit moindre que dans d'autres tubes, la quantité de chaleur transférée à travers les premiers tubes devant être moindre qu'à travers les autres en fonction du débit ou de la température du fluide passant au contact de la surface externe des tubes. Ce cas se présente en particulier dans les échangeurs de chaleur dans lesquels de la vapeur d'eau de chauffage sous pression élevée circule dans un faisceau tubulaire en plusieurs passes successives, en échange de chaleur avec un fluide d'abord relativement froid, puis partiellement réchauffé.Such devices are used in particular to control the distribution of the flow between the tubes of a tube bundle of heat exchange, when it is desired to pass in some of the tubes a flow less than in other tubes, the amount of heat transferred through the first tubes to be less than through the others depending on the flow rate or the temperature of the fluid passing in contact with the external surface of the tubes. This case arises in particular in heat exchangers in which steam of heating water under high pressure circulates in a tubular bundle in several successive passes, in exchange for heat with a fluid first relatively cold, then partially reheated .

Le métal de l'insert doit présenter des caractéristiques spécifiques permettant un dudgeonnage aisé dans le tube du faisceau ou dans le trou de la plaque tubulaire correspondant à ce tube, et posséder un coefficient de dilatation voisin de celui du tube d'échange afin d'éviter un dédudgeonnage sous l'effet des cyclages de température. Il doit aussi présenter une bonne résistance à l'érosion-corrosion par la vapeur humide à la sortie de l'orifice calibrée en raison des turbulences dûes aux fortes vitesses atteintes dans l'orifice. Seuls des alliages très coûteux possèdent l'ensemble de ces propriétés.The metal of the insert must have specific characteristics allowing easy expansion in the tube of the bundle or in the hole of the tube plate corresponding to this tube, and have a coefficient of expansion close to that of the exchange tube in order to avoid dedudging under the effect of temperature cycling. It must also have good resistance to erosion-corrosion by wet steam at the outlet of the calibrated orifice due to the turbulence due to the high speeds reached in the orifice. Only very expensive alloys have all of these properties.

Il est décrit dans le fascicule de la demande de brevet GB-A 2 082 308 un dispositif de contrôle de débit de ce genre, dans lequel l'orifice est percé dans un bloc de diamètre externe égal au diamètre externe du tube d'échangeur, ce bloc venant en butée sur la face d'extrémité du tube, celui-ci étant muni d'une gorge circonférentielle près de sa face d'extrémité, et le bloc étant muni d'une jupe s'étendant au-delà de la partie d'extrémité du tube et dont le rebord libre est recourbé dans la gorge circonférentielle, de façon à bloquer le dispositif sur le tube. Un tel dispositif vient nécessairement former une saillie prononcée sur l'extrémité du tube au-delà de la plaque tubulaire, ce qui le rend susceptible à la longue à une désolidarisation du tube sous l'effet de vibrations et à une érosion-corrosion par la vapeur pénétrant dans le faisceau tubulaire dont fait partie le tube.There is described in the specification of patent application GB-A 2 082 308 a flow control device of this kind, in which the orifice is drilled in a block of external diameter equal to the external diameter of the exchanger tube, this block abutting on the end face of the tube, the latter being provided with a circumferential groove near its end face, and the block being provided with a skirt extending beyond the part end of the tube and whose free edge is curved in the circumferential groove, so as to block the device on the tube. Such a device necessarily comes to form a pronounced projection on the end of the tube beyond the tube plate, which makes it susceptible in the long term to separation of the tube under the effect of vibrations and to erosion-corrosion by the vapor entering the tube bundle of which the tube is a part.

La présente invention a pour but de procurer un dispositif de contrôle de débit qu'il soit facile de fixer dans le tube d'échange de chaleur ou le trou de la plaque tubulaire correspondant, mais qui présente aussi une excellente résistance à l'érosion-corrosion.The object of the present invention is to provide a flow control device which is easy to fix in the heat exchange tube or the hole in the corresponding tube plate, but which also has excellent resistance to erosion. corrosion.

L'insert du dispositif selon l'invention est caractérisé en ce qu'il est dudgeonné dans la zone de l'extrémité du tube d'échangeur ou de l'orifice de la plaque tubulaire, en ce que son élément tubulaire amont est en un métal à faible limite élastique mais à taux d'allongement élastique élevé, et en ce que son élément tubulaire aval est en un métal résistant à l'érosion-corrosion, de longueur au moins égale à 10 fois son diamètre interne, et se terminant par un biseau d'arête vive externe et d'angle inférieur à 15°.The insert of the device according to the invention is characterized in that it is expanded in the region of the end of the exchanger tube or of the orifice of the tube plate, in that its upstream tubular element is in one metal with a low elastic limit but with a high elastic elongation rate, and in that its downstream tubular element is made of an erosion-corrosion-resistant metal, of length at least equal to 10 times its internal diameter, and ending with an external sharp edge bevel and angle less than 15 ° .

Le dispositif de l'invention répond en outre de préférence à au moins l'une des caractéristiques suivantes:

  • - Les éléments amont et aval de l'insert et le pourtour externe du disque à orifice calibré sont réunis par au moins un cordon de soudure.
  • - L'élément tubulaire amont est soudé par son bord extrême sur le pourtour interne du tube de l'échangeur, ou du trou de la plaque tubulaire, en amont de sa zone dudgeonnée.
  • - L'élément tubulaire amont est soudé par son bord amont extrême sur la soudure entre tube et plaque tubulaire sur la face amont de cette dernière.
  • - Le disque à orifice calibré est fixé par sertissage dans les éléments tubulaires amont et aval de l'insert.
The device of the invention also preferably meets at least one of the following characteristics:
  • - The upstream and downstream elements of the insert and the outer periphery of the calibrated orifice disc are joined by at least one weld bead.
  • - The upstream tubular element is welded by its extreme edge to the internal periphery of the exchanger tube, or of the hole of the tubular plate, upstream from its expanded area.
  • - The upstream tubular element is welded by its extreme upstream edge on the weld between tube and tubular plate on the upstream face of the latter.
  • - The calibrated orifice disc is fixed by crimping in the upstream and downstream tubular elements of the insert.

Il est décrit ci-après, à titre d'exemples et en référence aux figures du dessin annexé, des dispositifs de contrôle de débit dans les tubes d'un faisceau tubulaire de vapeur de chauffage pour séparateur-surchauffeur de vapeur humide selon l'invention.

  • La figure 1 représente en coupe axiale un dispositif dans lequel les éléments tubulaires amont et aval de l'insert et le disque à orifice calibré sont réunis par un cordon de soudure unique.
  • La figure 2 représente en coupe axiale un dispositif analogue à celui de la figure 1, mais dans lequel l'extrémité amont de l'insert est fixée dans le tube par un cordon de soudure.
  • La figure 3 représente en coupe axiale un dispositif analogue à celui de la figure 1, mais dans lequel l'insert est fixé par dudgeonnage dans un trou de la plaque tubulaire.
  • La figure 4 représente en coupe axiale un dispositif analogue à celui de la figure 1, mais dans lequel l'extrémité amont de l'insert est soudée sur le cordon de soudure entre tube et plaque tubulaire sur la face amont de celle-ci. La figure 5 représente à échelle agrandie le détail V de la figure 1.
  • La figure 6 représente à échelle agrandie une variante de détail V de la figure 1, dans laquelle les éléments tubulaires amont et aval de l'insert sont réunis par deux cordons de soudure distincts au disque à orifice calibré.
  • La figure 7 représente à échelle agrandie une variante de détail V de la figure 1, dans laquelle les éléments tubulaires amont et aval de l'insert sont réunis par sertissage au disque à orifice calibré.
It is described below, by way of examples and with reference to the figures of the appended drawing, flow control devices in the tubes of a tubular bundle of heating steam for separator-superheater of wet steam according to the invention .
  • Figure 1 shows in axial section a device in which the upstream and downstream tubular elements of the insert and the calibrated orifice disc are joined by a single weld bead.
  • Figure 2 shows in axial section a device similar to that of Figure 1, but in which the upstream end of the insert is fixed in the tube by a weld bead.
  • Figure 3 shows in axial section a device similar to that of Figure 1, but in which the insert is fixed by expansion in a hole in the tube plate.
  • Figure 4 shows in axial section a device similar to that of Figure 1, but in which the upstream end of the insert is welded to the weld bead between tube and tube plate on the upstream face thereof. FIG. 5 represents on an enlarged scale the detail V of FIG. 1.
  • 6 shows on an enlarged scale a variant detail V of Figure 1, in which the tubular elements upstream and downstream of the insert are joined by two separate weld beads to the disc with calibrated orifice.
  • Figure 7 shows on an enlarged scale a variant detail V of Figure 1, in which the upstream and downstream tubular elements of the insert are joined by crimping to the calibrated orifice disc.

Dans le dispositif de la figure 1, l'extrémité du tube d'échange de chaleur 2 est fixée dans un orifice de la plaque tubulaire 1 et soudée en 3 par son bord extrême sur celle-ci. Le dispositif de contrôle de débit 4 se compose d'une partie amont 5 et d'une partie aval 6, soudées l'une à l'autre et au disque 7, percé d'un alésage calibré 8. L'élément amont est en acier à faible limite élastique, mais à fort coefficient d'allongement élastique, par exemple en un acier au carbone de la nuance Tu 42.In the device of Figure 1, the end of the heat exchange tube 2 is fixed in an orifice of the tube plate 1 and welded at 3 by its end edge thereon. The die control device bit 4 consists of an upstream part 5 and a downstream part 6, welded to each other and to the disc 7, drilled with a calibrated bore 8. The upstream element is made of steel with low elastic limit , but with a high coefficient of elastic elongation, for example in carbon steel of the Tu 42 grade.

Il est dudgeonné dans sa zone 9 dans l'extrémité du tube d'échange de façon à assurer l'étanchéité entre ce dispositif et le tube. Son extrémité 10 est rabattue sur l'extrémité de ce tube.It is expanded in its zone 9 in the end of the exchange tube so as to seal between this device and the tube. Its end 10 is folded over the end of this tube.

L'élément aval du dispositif est en un acier résistant à l'érosion-corrosion par la vapeur d'eau, par exemple en l'un des aciers connus sous les désignations Z2 CN 18-10 ou Z2 CT 18.The downstream element of the device is made of a steel resistant to erosion-corrosion by water vapor, for example one of the steels known under the designations Z2 CN 18-10 or Z2 CT 18.

Son épaisseur est légèrement inférieure à celle de l'élément amont. Sa longueur est supérieure à au moins 10 fois son diamètre interne, afin qu'il ne puisse apparaître de phénomènes d'érosion-corrosion dus à l'écoulement de la vapeur d'eau à la sortie de l'orifice du disque sur la paroi interne du tube, du fait de la perte de charge de la vapeur d'eau au passage à travers l'orifice calibré, et elle se termine par un biseau 12 d'arête vive externe et d'angle inférieure à 15°, assurant un écoulement laminaire au contact de la paroi du tube.Its thickness is slightly less than that of the upstream element. Its length is greater than at least 10 times its internal diameter, so that it cannot appear erosion-corrosion phenomena due to the flow of water vapor at the outlet of the orifice of the disc on the wall internal of the tube, due to the pressure drop of the water vapor when passing through the calibrated orifice, and it ends in a bevel 12 of external sharp edge and of angle less than 15 ° , ensuring a laminar flow in contact with the wall of the tube.

Le disque 7 à orifice calibré 8 est également en un acier résistant à l'érosion-corrosion par la vapeur d'eau, par exemple l'acier Z2 CN 18-10. Les éléments amont et aval et le disque à orifice calibré sont soudés ensemble par un cordon de soudure 11, cette soudure apparaissant à échelle agrandie sur la figure 5, où l'on voit que les extrémités des éléments amont et aval viennent en butée sur un bourrelet circonférentiel du disque 7.The disc 7 with calibrated orifice 8 is also made of a steel resistant to erosion-corrosion by water vapor, for example steel Z2 CN 18-10. The upstream and downstream elements and the calibrated orifice disc are welded together by a weld bead 11, this weld appearing on an enlarged scale in FIG. 5, where it can be seen that the ends of the upstream and downstream elements abut on a circumferential bead of the disc 7.

La figure 2 représente un dispositif analogue à celui de la figure 1, mais dans lequel le bord extrême de son élément amont est fixé sur le pourtour interne du tube par un cordon de soudure 13, de façon à éviter un glissement du dispositif à l'intérieur du tube au cas où la fixation par dudgeonnage dans la zone 9 viendrait à céder.FIG. 2 represents a device similar to that of FIG. 1, but in which the extreme edge of its upstream element is fixed on the internal periphery of the tube by a weld bead 13, so as to avoid sliding of the device when inside the tube in case the fastening by expansion in zone 9 breaks.

La figure 3 représente un dispositif analogue à celui de la figure 1, mais dans lequel le tube 14 ne pénètre pas dans la plaque tubulaire 1, sur la face aval de laquelle il est soudé par un cordon de soudure 15. C'est alors le dispositif de contrôle de débit lui-même qui est dudgeonné dans sa zone 9 dans la plaque tubulaire, et soudé à celleci sur son bord extrême par le cordon de soudure 13.FIG. 3 represents a device similar to that of FIG. 1, but in which the tube 14 does not penetrate into the tubular plate 1, on the downstream face of which it is welded by a weld bead 15. This is then the flow control device itself which is expanded in its zone 9 in the tube plate, and welded thereto on its extreme edge by the weld bead 13.

La figure 4 représente un dispositif analogue à celui de la figure 1, mais dans lequel l'insert est soudé par son bord amont sur le cordon de soudure réunissant le bord du tube à la plaque tubulaire, en formant ainsi un cordon de soudure commun 13A. On dispose ainsi d'une accessibilité bien meilleure pour le soudage du bord de l'insert, ce qui facilite l'exécution et le contrôle de cette soudure.FIG. 4 represents a device similar to that of FIG. 1, but in which the insert is welded by its upstream edge to the weld bead joining the edge of the tube to the tubular plate, thus forming a common weld bead 13A . This provides much better accessibility for welding the edge of the insert, which facilitates the execution and control of this welding.

La vue à échelle agrandie de la figure 6 représente une variante de la fixation mutuelle des éléments amont 5 et aval 6 et du dispositif 7 à orifice calibré par un cordon de soudure 11 A de l'élément amont sur le disque 7, et un cordon de soudure 11 A de l'élément aval sur ce même disque.The enlarged view of FIG. 6 represents a variant of the mutual fixing of the upstream 5 and downstream 6 elements and of the device 7 with orifice calibrated by a weld bead 11 A of the upstream element on the disc 7, and a bead of welding 11 A of the downstream element on this same disc.

La figure 7 représente une variante de la fixation mutuelle entre les éléments amont et aval et le disque à orifice calibré, dans lequel les extrémités des deux éléments sont serties respectivement en 16 et en 17 sur le disque 7.FIG. 7 represents a variant of the mutual fixing between the upstream and downstream elements and the disc with calibrated orifice, in which the ends of the two elements are crimped at 16 and 17 respectively on the disc 7.

Claims (5)

1. A device for adjusting the throughput of a heat exchanger tube (2) traversed by steam, comprising an insert (4) secured in a zone (9) of the end of the heat exchanger tube or of the orifice in the tube plate (1) corresponding to this tube, and a disk (7) having a calibrated orifice (8) and being made of an erosion-corrosion resistant metal, secured inside the insert (4), said insert comprising a tubular member (5) upstream of the disk including the calibrated orifice, and a tubular member (6) downstream the disk, which member extends over a considerable length, characterized in that the insert (4) is secured in said zone (9) through rolling deformation, that its upstream tubular member (5) is made of a metal having a low limit of elasticity but a high elastic elongation ratio, and that its downstream tubular member (6) is made of a metal resistant to erosion-corrosion and having a length equal to at least 10 times its inside diameter and ending in a chamfrein having a sharp outer edge of an angle of at most 15°.
2. A device according to claim 1, characterized in that the upstream respectively downstream tubular members (5 respectively 6) of the insert (4) and the outer periphery of the disk including the calibrated orifice (8) are joined by at least one weld bead (11).
3. A device according to claims 1 or 2, characterized in that the upstream tubular member (5) is welded (13, figure 2) by its upstream end rim to the inner periphery of the exchanger tube (2), or of the orifice of the tube provided in the tube plate (1), upstream of the rolled zone (9).
4. A device according to claims 1 or 2, characterized in that the upstream tubular member (5) is welded (13A, figure 4) by its upstream end rim to the weld realized between the tube (2) and the tube plate (1) on the upstream face of the latter.
5. A device according to claim 1, characterized in that the disk (7) including the calibrated orifice is secured by squeezing (16, 17, figure 7) inside the upstream (5) and downstream (6) tubular members of the insert (4).
EP86117624A 1985-12-23 1986-12-18 Device for flow-control in a heat-exchanger tube Expired EP0232527B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8519042A FR2592147B1 (en) 1985-12-23 1985-12-23 DEVICE FOR CONTROLLING FLOW IN A HEAT EXCHANGER TUBE.
FR8519042 1985-12-23

Publications (2)

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EP0232527A1 EP0232527A1 (en) 1987-08-19
EP0232527B1 true EP0232527B1 (en) 1989-09-13

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EP86117624A Expired EP0232527B1 (en) 1985-12-23 1986-12-18 Device for flow-control in a heat-exchanger tube

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US (1) US4735263A (en)
EP (1) EP0232527B1 (en)
CA (1) CA1273546A (en)
DE (1) DE3665629D1 (en)
ES (1) ES2011247B3 (en)
FR (1) FR2592147B1 (en)

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Also Published As

Publication number Publication date
FR2592147A1 (en) 1987-06-26
CA1273546A (en) 1990-09-04
EP0232527A1 (en) 1987-08-19
FR2592147B1 (en) 1988-03-18
DE3665629D1 (en) 1989-10-19
US4735263A (en) 1988-04-05
ES2011247B3 (en) 1990-01-01

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