ES2202969T3 - PROCEDURE FOR MANUFACTURING COPPER PIPES. - Google Patents
PROCEDURE FOR MANUFACTURING COPPER PIPES.Info
- Publication number
- ES2202969T3 ES2202969T3 ES99114365T ES99114365T ES2202969T3 ES 2202969 T3 ES2202969 T3 ES 2202969T3 ES 99114365 T ES99114365 T ES 99114365T ES 99114365 T ES99114365 T ES 99114365T ES 2202969 T3 ES2202969 T3 ES 2202969T3
- Authority
- ES
- Spain
- Prior art keywords
- tube
- annealing
- procedure
- oxygen
- cold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Metal Extraction Processes (AREA)
- Laminated Bodies (AREA)
- Heat Treatment Of Articles (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
Procedimiento para fabricar tubos de cobre.Procedure to manufacture copper pipes.
Esta invención se centra en un procedimiento para fabricar tubos de cobre y en particular para tubos de temple duro para uso sanitario. Según el procedimiento desarrollado, la pared de tubo extruída se conforma en frío hasta casi su tamaño final, tras lo cual el tubo se somete a un recocido continuo en condiciones oxidantes con el fin de ajustar el tubo a su tamaño final en la etapa de conformación en frío y finalmente a la limpieza mediante chorro de arena en la superficie interna del tubo. Por medio de este procedimiento se evita el uso de disolventes orgánicos y al mismo tiempo se consigue un tubo con una excelente resistencia a la corrosión.This invention focuses on a method for manufacture copper pipes and in particular for hard tempering tubes for sanitary use. According to the procedure developed, the wall of Extruded tube is cold formed to almost its final size, after which the tube is subjected to continuous annealing under conditions oxidizers in order to adjust the tube to its final size in the cold forming stage and finally cleaning by sandblasting on the inner surface of the tube. Through this procedure avoids the use of organic solvents and at the same time you get a tube with excellent resistance to corrosion.
El procedimiento convencional para tratar tubos rígidos ha comprendido etapas de conformación en frío tras la extrusión, tales como estirado mediante bloque estirador, enderezamiento y corte y el posterior desengrase, en el que se elimina el lubricante para el estirado de la superficie interna del tubo. El lubricante residual se elimina para que no forme una película de carbono durante la instalación, lo que a su vez provocaría la corrosión por picadura. En la práctica, esta etapa de desengrase ha implicado la inmersión de los tubos en un disolvente orgánico tal como tricloroetileno.The conventional procedure for treating tubes rigid has understood cold forming stages after the extrusion, such as stretching by stretching block, straightening and cutting and subsequent degreasing, in which removes the lubricant for stretching the internal surface of the tube. The residual lubricant is removed so that it does not form a carbon film during installation, which in turn It would cause pitting corrosion. In practice, this stage of degreasing has involved the immersion of the tubes in a solvent organic such as trichlorethylene.
El lavado de los tubos en disolventes orgánicos está cada vez más sometido a límites y normas, ya que, por ejemplo, el tricloroetileno no se considera una sustancia inocua para el ambiente. Sin embargo, el lavado con otros disolventes no siempre produce un resultado satisfactorio.Washing the tubes in organic solvents is increasingly subject to limits and norms, since, for example, Trichlorethylene is not considered a harmless substance for environment. However, washing with other solvents does not always It produces a satisfactory result.
En la solicitud de patente EP 306810, se conoce un procedimiento de tratamiento para tubos estirados en frío de uso sanitario, en los que el tubo se fabrica a partir de una pared de tubo usando las etapas normales de conformación en frío, tras las cuales el tubo se somete a desengrase, en el que los tubos primero se sumergen en un disolvente orgánico y posteriormente se tratan con un chorro de arena.In patent application EP 306810, it is known a treatment procedure for cold drawn tubes for use sanitary, in which the tube is manufactured from a wall of tube using normal cold forming stages, after which tube undergoes degreasing, in which the tubes first they are immersed in an organic solvent and subsequently treated with a stream of sand.
En la patente EP 281641 se describe un procedimiento de tratamiento para tubos duros y semiduros, en el que los tubos se forman mediante estirado en frío hasta su longitud final, tras lo cual se someten a recocido continuo en una atmósfera rica en oxígeno. Durante el recocido, los restos de grasa para el estirado se eliminan quemándolos.EP 281641 describes a treatment procedure for hard and semi-hard tubes, in which the tubes are formed by cold drawing to their length final, after which they undergo continuous annealing in an atmosphere rich in oxygen During annealing, the fat remains for the Stretched are removed by burning them.
En la solicitud de patente EP 647723 se describe un procedimiento de fabricación para tubos duros o semiduros, en el que se pretende que el tubo libere una cantidad de iones de cobre tan pequeña como sea posible, en, por ejemplo, el agua potable normal. Según el procedimiento, la pared de tubo se conforma en frío hasta un tamaño intermedio, tras lo cual se rugosifica la superficie interna. La rugosificación se puede realizar tanto por medio de chorro de arena como de decapado (Beizen). Después de esto, el tubo es conducido al tratamiento de recocido a una temperatura de 350 a 650ºC, en el que se introduce en el tubo una mezcla de gas protector y oxígeno (1 a 7% de O_{2}), con el fin de formar una película protectora de óxido en la superficie interna del tubo. Posteriormente, el tubo se somete a estirado en frío hasta su tamaño final, en el que la reducción es de un 20%. Si fuera necesario, el tubo se puede desengrasar tras el estirado en frío. Tras el estirado final, el tubo se somete a un nuevo tratamiento térmico a una temperatura de 175 a 275ºC en presencia de un gas oxigenado (al menos 20% de O_{2}). El resultado de este tratamiento es la formación de una capa de malaquita muy estable en la superficie interna del tubo, que evita la disolución de los iones de cobre en el agua potable.Patent application EP 647723 describes a manufacturing process for hard or semi-hard tubes, in the that the tube is intended to release a quantity of copper ions as small as possible, in, for example, drinking water normal. According to the procedure, the tube wall is cold formed to an intermediate size, after which the surface is roughened internal Roughness can be done both by sandblasting as pickling (Beizen). After this, the tube It is led to the annealing treatment at a temperature of 350 to 650 ° C, in which a mixture of protective gas is introduced into the tube and oxygen (1 to 7% O2), in order to form a film protective oxide on the inner surface of the tube. Subsequently, the tube is cold drawn to its size final, in which the reduction is 20%. If necessary, the Tube can be degreased after cold drawing. After stretching Finally, the tube is subjected to a new heat treatment to a temperature from 175 to 275 ° C in the presence of an oxygenated gas (at minus 20% of O2). The result of this treatment is the formation of a very stable malachite layer on the surface internal tube, which prevents the dissolution of copper ions in drinking water.
Según el procedimiento recién desarrollado, se pueden fabricar tubos de cobre duro apropiados para su uso sanitario de forma sencilla. La pared de tubo extruída se estira utilizando la tecnología convencional de conformación en frío hasta casi su tamaño final. Después de esto se hace pasar oxígeno o un gas enriquecido con oxígeno dentro del tubo enrollado, y el tubo se calienta brevemente mediante recocido continuo a una temperatura de 450 a 650ºC, preferiblemente de 500 a 600ºC. Al hacer esto, se quema cualquier residuo de lubricante en la superficie interna del tubo. Después de calentarlo, el tubo se somete a una etapa final de formación de aproximadamente 5 a 20%. Después de esto, el tubo se corta al tamaño especificado y la superficie interna del tubo se limpia mediante chorro de arena. Las características básicas de la invención se harán evidentes en las reivindicaciones adjuntas.According to the newly developed procedure, it they can manufacture hard copper pipes suitable for sanitary use In a simple way. The extruded tube wall is stretched using the conventional cold forming technology to almost its size final. After this oxygen or enriched gas is passed with oxygen inside the rolled tube, and the tube is heated briefly by continuous annealing at a temperature of 450 to 650 ° C, preferably 500 to 600 ° C. When you do this, it burns any lubricant residue on the inner surface of the tube. After heating, the tube undergoes a final stage of formation of approximately 5 to 20%. After this, the tube will cut to the specified size and the inner surface of the tube is sandblasting The basic characteristics of the invention will become apparent in the appended claims.
Aunque el método desarrollado aún implica el recocido del tubo duro, es muy importante que el estirado del tubo a través del horno de recocido se lleve a cabo a una velocidad, de 100 a 200 m/min, preferiblemente de 120 a 160 m/min, tal que la estructura no tenga tiempo de recristalizar o ablandarse. Durante el recocido hay oxígeno o un gas enriquecido con oxígeno en el interior del tubo, con un enriquecimiento en oxígeno del 20% y preferiblemente del 50%. Hay signos del comienzo de la recristalización en la microestructura, pero durante el estirado en frío final tras el recocido, el tubo se forma de manera que sus valores se encuentren dentro de la región del tubo duro. Una ventaja del estirado tras el recocido es que el tubo se formará precisamente conforme a los juegos de tolerancias.Although the method developed still implies the annealing of the hard tube, it is very important that the stretching of the tube to through the annealing oven is carried out at a speed of 100 at 200 m / min, preferably from 120 to 160 m / min, such that the structure does not have time to recrystallize or soften. During the annealing there is oxygen or a gas enriched with oxygen inside of the tube, with an oxygen enrichment of 20% and preferably 50%. There are signs of the beginning of the recrystallization in the microstructure, but during stretching in final cold after annealing, the tube is formed so that its values are within the region of the hard tube. An advantage of stretching after annealing is that the tube will form precisely according to the tolerance games.
El lavado convencional de la superficie interna de los tubos duros tiene lugar con disolventes orgánicos pero, como se explicó en la técnica anterior, los disolventes orgánicos se están convirtiendo en un peligro ambiental. El lavado mediante chorro de arena ha resultado ser muy eficaz para eliminar los residuos de grasa para el estirado, evitando de este modo la formación de la película de carbono y la corrosión por picadura del agua fría. El procedimiento recién desarrollado sustituye al conocido anteriormente, que usaba un disolvente orgánico para limpiar la superficie interna de los tubos.Conventional washing of the internal surface of the hard tubes takes place with organic solvents but, as explained in the prior art, organic solvents were They are becoming an environmental hazard. Washing by sandblasting has proved very effective in eliminating grease residues for stretching, thus avoiding carbon film formation and pitting corrosion of cold water. The newly developed procedure replaces the known above, which used an organic solvent to Clean the inner surface of the tubes.
Con el uso de disolventes orgánicos ha surgido otro problema: En el mercado existe la necesidad de fabricar un estampado en color además del estampado con punzón normal en los tubos y se ha mostrado que el estampado en color no resiste el lavado con sustancias orgánicas. La adición por separado del estampado en color después del lavado da lugar a otra nueva, y por lo tanto cara, etapa de trabajo. Cuando se usa el lavado mediante chorro de arena como procedimiento para limpiar el interior de los tubos no es necesario ninguna otra etapa de trabajo para fabricar el estampado en color.With the use of organic solvents has emerged Another problem: In the market there is a need to manufacture a color stamping in addition to stamping with normal punch in the tubes and it has been shown that color printing does not resist washing with organic substances. The addition separately from color stamping after washing results in a new one, and by So expensive, work stage. When washing by using sandblasting as a procedure to clean the inside of no other work stage is necessary to manufacture the color print.
La invención se describe aún más en el siguiente ejemplo:The invention is described further in the following example:
El tubo de cobre se fabricó como de costumbre mediante extrusión y estirado por medio de bloque estirador, pero en el estirado final por medio de bloque estirador se dejó el tubo a un tamaño mayor que el final. El tubo enrollado se llenó con un gas que contenía oxígeno y se calentó brevemente a una temperatura de 500 a 650ºC. En la tabla de abajo se enumeran las propiedades del tubo después del estirado final (tamaño del tubo 15 x 1 mm) y una comparación con los requisitos estipulados por la norma EN1057 para tubos duros. El curvado, según la norma, significa que el ensayo de curvado se lleva a cabo según las condiciones impuestas por la norma EN 10232, de modo que en este punto no se observará ningún roto a simple vista. La 1ª clase mencionada en los resultados de los ensayos significa que el tubo cumple con los estrictos requisitos de la norma.The copper tube was manufactured as usual by extrusion and stretching by means of a stretch block, but in the final stretch by means of a stretch block the tube was left to a size larger than the end. The rolled tube was filled with a gas that it contained oxygen and briefly heated to a temperature of 500 to 650 ° C. The properties of the tube are listed in the table below. after final stretching (tube size 15 x 1 mm) and a comparison with the requirements stipulated by standard EN1057 for hard tubes Bending, according to the standard, means that the test of bending is carried out according to the conditions imposed by the standard EN 10232, so that at this point no break will be observed at simple sight The 1st class mentioned in the results of the testing means that the tube meets the strict requirements of the rule.
Claims (8)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI981683 | 1998-07-30 | ||
FI981683A FI107543B (en) | 1998-07-30 | 1998-07-30 | A method for making a copper tube |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2202969T3 true ES2202969T3 (en) | 2004-04-01 |
Family
ID=8552250
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES99114365T Expired - Lifetime ES2202969T3 (en) | 1998-07-30 | 1999-07-21 | PROCEDURE FOR MANUFACTURING COPPER PIPES. |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0976845B1 (en) |
AT (1) | ATE245208T1 (en) |
DE (1) | DE69909565T2 (en) |
DK (1) | DK0976845T3 (en) |
ES (1) | ES2202969T3 (en) |
FI (1) | FI107543B (en) |
NO (1) | NO312619B1 (en) |
PL (1) | PL189820B1 (en) |
PT (1) | PT976845E (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20001467A (en) * | 2000-06-20 | 2001-12-21 | Outokumpu Oy | Process for making internally coated copper or copper alloy tubes |
FI120359B (en) * | 2002-12-18 | 2009-09-30 | Cupori Group Oy | Method and apparatus for treating an inner surface of a copper or copper alloy tube |
CN101492798B (en) * | 2009-03-13 | 2010-12-29 | 无锡隆达金属材料有限公司 | Pickling free producing process for copper alloy tube |
CN110605304A (en) * | 2019-09-18 | 2019-12-24 | 上海海亮铜业有限公司 | Production process of aluminum brass thin-wall pipe |
CN111979390A (en) * | 2020-07-02 | 2020-11-24 | 中国船舶重工集团公司第七二五研究所 | Method for removing residual carbon on inner surface of small-caliber seawater copper-nickel pipe |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
LU67959A1 (en) * | 1973-07-06 | 1975-04-11 | ||
LU81564A1 (en) * | 1979-07-31 | 1981-03-24 | Liege Usines Cuivre Zinc | METHOD FOR MANUFACTURING TUBES, TUBES OBTAINED BY THIS PROCESS AND THEIR USE IN CONDENSERS AND HEAT EXCHANGERS |
DE3003228C2 (en) * | 1980-01-30 | 1981-11-26 | Wieland-Werke Ag, 7900 Ulm | Process for improving the corrosion resistance of installation pipes made of copper |
DE3018036A1 (en) * | 1980-05-10 | 1981-11-12 | Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover | METHOD OF TREATING COPPER PIPES |
US4351678A (en) * | 1980-08-06 | 1982-09-28 | Usines A Cuivre Et A Zinc De Liege | Method of making corrosion resistant phosphorous copper or phosphorous copper alloy pipes |
EP0281641B1 (en) | 1987-03-07 | 1989-08-30 | Wieland-Werke Ag | Process for improving the corrosion resistance of hard or semi-hard copper fitting tubes |
DE3730367C2 (en) | 1987-09-10 | 1997-10-09 | Km Europa Metal Ag | Process for the production of pitting-resistant hard drawn tubes made of copper or copper alloys |
EP0335999A1 (en) * | 1988-04-08 | 1989-10-11 | Wieland-Werke AG | Method of cleaning metal tubes, in particular cupper-tubes |
DE3827353A1 (en) * | 1988-08-12 | 1990-02-22 | Kabelmetal Ag | INTERNAL OXIDIZED TUBES |
DE4334536A1 (en) * | 1993-10-09 | 1995-04-13 | Kabelmetal Ag | Process for the production of seamless drawn semi-hard / hard installation pipes |
-
1998
- 1998-07-30 FI FI981683A patent/FI107543B/en active
-
1999
- 1999-07-21 EP EP99114365A patent/EP0976845B1/en not_active Expired - Lifetime
- 1999-07-21 AT AT99114365T patent/ATE245208T1/en not_active IP Right Cessation
- 1999-07-21 DE DE69909565T patent/DE69909565T2/en not_active Expired - Fee Related
- 1999-07-21 DK DK99114365T patent/DK0976845T3/en active
- 1999-07-21 PT PT99114365T patent/PT976845E/en unknown
- 1999-07-21 ES ES99114365T patent/ES2202969T3/en not_active Expired - Lifetime
- 1999-07-28 PL PL99334652A patent/PL189820B1/en not_active IP Right Cessation
- 1999-07-29 NO NO19993683A patent/NO312619B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
NO993683L (en) | 2000-01-31 |
EP0976845A1 (en) | 2000-02-02 |
FI981683A0 (en) | 1998-07-30 |
DE69909565T2 (en) | 2004-01-29 |
PL334652A1 (en) | 2000-01-31 |
PT976845E (en) | 2003-10-31 |
PL189820B1 (en) | 2005-09-30 |
FI107543B (en) | 2001-08-31 |
FI981683A (en) | 2000-01-31 |
DK0976845T3 (en) | 2003-10-27 |
DE69909565D1 (en) | 2003-08-21 |
ATE245208T1 (en) | 2003-08-15 |
EP0976845B1 (en) | 2003-07-16 |
NO993683D0 (en) | 1999-07-29 |
NO312619B1 (en) | 2002-06-10 |
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