EP0306810B2 - Procédé pour la fabrication de tubes en cuivre ou en alliages cuivreux étirés à froid et résistant à la corrosion - Google Patents

Procédé pour la fabrication de tubes en cuivre ou en alliages cuivreux étirés à froid et résistant à la corrosion Download PDF

Info

Publication number
EP0306810B2
EP0306810B2 EP88114157A EP88114157A EP0306810B2 EP 0306810 B2 EP0306810 B2 EP 0306810B2 EP 88114157 A EP88114157 A EP 88114157A EP 88114157 A EP88114157 A EP 88114157A EP 0306810 B2 EP0306810 B2 EP 0306810B2
Authority
EP
European Patent Office
Prior art keywords
copper
tubes
pitting
films
treated
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
Application number
EP88114157A
Other languages
German (de)
English (en)
Other versions
EP0306810A2 (fr
EP0306810B1 (fr
EP0306810A3 (en
Inventor
Achim Dr. Baukloh
Ulrich Dr. Reiter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KM Europa Metal AG
Original Assignee
KM Europa Metal AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6335681&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0306810(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KM Europa Metal AG filed Critical KM Europa Metal AG
Priority to AT88114157T priority Critical patent/ATE103225T1/de
Publication of EP0306810A2 publication Critical patent/EP0306810A2/fr
Publication of EP0306810A3 publication Critical patent/EP0306810A3/de
Publication of EP0306810B1 publication Critical patent/EP0306810B1/fr
Application granted granted Critical
Publication of EP0306810B2 publication Critical patent/EP0306810B2/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • B24C3/327—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes by an axially-moving flow of abrasive particles without passing a blast gun, impeller or the like along the internal surface

Definitions

  • the invention relates to a method for the treatment of hard-drawn Pipes made of copper or a copper alloy for use in the sanitary area.
  • a multi-stage cleaning process where the inside of the pipe first with steam degreased, dried, treated with an abrasive and then blow with medically clean air becomes.
  • Another type of treatment is that Perform annealing in a reducing atmosphere and the resulting carbon film to be removed by an abrasive.
  • an abrasive either by pressurized water or compressed air.
  • the invention lies based on the state of the art the task is based on a method for the treatment of hard drawn copper or copper pipes to create a copper alloy for use in the sanitary area in which the Formation of carbon and / or oxide films in the Brazing or hot bending prevented and thus the pitting resistance of this Pipes is improved.
  • the method according to the teaching of the invention differs from the previously known in relevant soft annealed copper pipes Process by a combination of chemical and mechanical treatment stages.
  • the process succeeds in a surprising way Way, the formation of harmful films, e.g. B. carbon-containing pastures or oxide films, on the inner surface of hard-drawn Avoid copper pipes.
  • films acting as bipolar electrodes are formed usually in the case of brazing or Hot bending of copper pipes usual temperatures.
  • the invention is based on Embodiments explained in more detail.
  • tubes measuring 22 x 1 mm were used.
  • the tubes were treated with corundum for 10 s.
  • the mean roughness value R a was 1.0 am after the blasting agent treatment.
  • the residual carbon or lubricant content was again below the detection limit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Extraction Processes (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
  • Heat Treatment Of Articles (AREA)
  • Processing Of Meat And Fish (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)
  • Saccharide Compounds (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Cleaning In General (AREA)
  • Chemical Treatment Of Metals (AREA)
  • ing And Chemical Polishing (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (5)

  1. Procédé de fabrication de tuyaux en cuivre ou alliage de cuivre, étirés à froid, dans le domaine sanitaire, dans lequel les tuyaux étirés au cours de la déformation à froid à la mesure finale sont immergés en premier lieu dans un bain de solvant organique et de cette façon les surfaces intérieures sont dégraissées,
    caractérisé en ce qu'
    ensuite on traite la surface intérieure des tuyaux pendant un intervalle de temps d'environ 3 à 30 s avec un courant de particules de sable ou de corindon, et on obtient de cette façon, sur les surfaces intérieures, une rugosité moyenne de 0,4 à 1,0 µm.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les surfaces intérieures des tubes sont traitées pendant un intervalle de temps de 5 à 10 secondes avec un agent d'abrasion à base de particules de sable ou de corindon.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    les surfaces intérieures des tubes sont traitées sous une pression d'au moins 0,5 MPa avec un agent abrasif à base de particules de sable ou de corindon.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que
    les particules de sable ou de corindon sont utilisées avec un diamètre moyen de particule d'environ 200 à 350 µm.
  5. Procédé selon la revendication 1,
    caractérisé en ce qu'
    au moins les surfaces intérieures des tubes sont, en outre, décapées en vue du dégraissage.
EP88114157A 1987-09-10 1988-08-31 Procédé pour la fabrication de tubes en cuivre ou en alliages cuivreux étirés à froid et résistant à la corrosion Expired - Lifetime EP0306810B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88114157T ATE103225T1 (de) 1987-09-10 1988-08-31 Verfahren zur herstellung lochfrassbestaendiger hartgezogener rohre aus kupfer oder kupferlegierungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730367 1987-09-10
DE3730367A DE3730367C2 (de) 1987-09-10 1987-09-10 Verfahren zur Herstellung lochfraßbeständiger hartgezogener Rohre aus Kupfer oder Kupferlegierungen

Publications (4)

Publication Number Publication Date
EP0306810A2 EP0306810A2 (fr) 1989-03-15
EP0306810A3 EP0306810A3 (en) 1990-05-30
EP0306810B1 EP0306810B1 (fr) 1994-03-23
EP0306810B2 true EP0306810B2 (fr) 2000-03-29

Family

ID=6335681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88114157A Expired - Lifetime EP0306810B2 (fr) 1987-09-10 1988-08-31 Procédé pour la fabrication de tubes en cuivre ou en alliages cuivreux étirés à froid et résistant à la corrosion

Country Status (11)

Country Link
EP (1) EP0306810B2 (fr)
AT (1) ATE103225T1 (fr)
DE (2) DE3730367C2 (fr)
DK (2) DK493288D0 (fr)
ES (1) ES2050684T5 (fr)
FI (1) FI94496B (fr)
GR (1) GR3033568T3 (fr)
IE (1) IE63028B1 (fr)
PL (1) PL163146B1 (fr)
PT (1) PT88473B (fr)
YU (1) YU46572B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4417455C2 (de) 1994-05-19 1997-09-25 Wieland Werke Ag Verwendung eines korrosionsbeständigen Rohres mit inneren Oxidschichten
FI107543B (fi) 1998-07-30 2001-08-31 Outokumpu Oy Menetelmä kupariputken valmistamiseksi
FI20001467A7 (fi) * 2000-06-20 2001-12-21 Outokumpu Oy Menetelmä sisäpuolelta pinnoitettujen kupari- tai kupariseosputkien valmistamiseksi

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308436A1 (fr) * 1975-04-25 1976-11-19 Cit Alcatel Traitement des tubes en cuivre et alliages en vue de l'elimination des produits carbones subsistant a leur surface
LU81564A1 (fr) * 1979-07-31 1981-03-24 Liege Usines Cuivre Zinc Procede de fabrication de tubes,tubes obtenus par ce procede et leur utilisation dans des condenseurs et des echangeurs de chaleur
DE3018036A1 (de) * 1980-05-10 1981-11-12 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren von behandlung von kupferrohren
IT1160196B (it) * 1983-02-24 1987-03-04 Dalmine Spa Procedimento di disossidazione a caldo di tubi metallici semilavorati
DE3415376A1 (de) * 1984-04-25 1985-11-07 Uhlmann, Otto, 3167 Burgdorf Verfahren und vorrichtung zum entfetten von rohren
US4579596A (en) * 1984-11-01 1986-04-01 Union Carbide Corporation In-situ removal of oily deposits from the interior surfaces of conduits

Also Published As

Publication number Publication date
DK170250B1 (da) 1995-07-17
EP0306810A2 (fr) 1989-03-15
YU46572B (sh) 1993-11-16
PL163146B1 (pl) 1994-02-28
GR3033568T3 (en) 2000-09-29
PT88473B (pt) 1992-11-30
PL274547A1 (en) 1989-05-02
ATE103225T1 (de) 1994-04-15
EP0306810B1 (fr) 1994-03-23
ES2050684T3 (es) 1994-06-01
YU171088A (en) 1990-04-30
DK495488D0 (da) 1988-09-06
FI94496B (fi) 1995-06-15
IE882707L (en) 1989-03-10
DE3730367C2 (de) 1997-10-09
FI884071L (fi) 1989-03-11
DE3730367A1 (de) 1989-03-23
EP0306810A3 (en) 1990-05-30
FI884071A0 (fi) 1988-09-02
DE3888605D1 (de) 1994-04-28
DK493288D0 (da) 1988-09-05
PT88473A (pt) 1988-10-01
DK495488A (da) 1989-03-11
ES2050684T5 (es) 2000-07-01
IE63028B1 (en) 1995-03-22

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