DE3888605D1 - Process for the production of pitting-resistant hard drawn pipes made of copper or copper alloys. - Google Patents

Process for the production of pitting-resistant hard drawn pipes made of copper or copper alloys.

Info

Publication number
DE3888605D1
DE3888605D1 DE88114157T DE3888605T DE3888605D1 DE 3888605 D1 DE3888605 D1 DE 3888605D1 DE 88114157 T DE88114157 T DE 88114157T DE 3888605 T DE3888605 T DE 3888605T DE 3888605 D1 DE3888605 D1 DE 3888605D1
Authority
DE
Germany
Prior art keywords
copper
pitting
tubes
films
hard
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 - Fee Related
Application number
DE88114157T
Other languages
German (de)
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.)
KME Special Products GmbH and Co KG
Original Assignee
KM Kabelmetal 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=DE3888605(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by KM Kabelmetal AG filed Critical KM Kabelmetal AG
Priority to DE88114157T priority Critical patent/DE3888605D1/en
Application granted granted Critical
Publication of DE3888605D1 publication Critical patent/DE3888605D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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

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)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Cleaning In General (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Processing Of Meat And Fish (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Chemical Treatment Of Metals (AREA)
  • ing And Chemical Polishing (AREA)
  • Saccharide Compounds (AREA)
  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

The corrosion damage, particularly that due to local pitting, which occurs on hard-drawn copper tubes used in the sanitary sector is generally caused by carbon-containing films but also by oxide films. A carbon film on the inside of the tube is formed, for example, if the drawing compound added when drawing the tube is subjected to excessive heat. To avoid these damaging films and to improve the pitting resistance of hard tubes made of copper or copper-based alloys, the tubes are first of all degreased. In a further process step, the inner surface of the tubes is then treated with a blasting abrasive in order to establish a minimum roughness. A mean roughness of 0.8 to 1.0 mu m has proven particularly advantageous. The hard-drawn tubes treated by the method according to the invention have none of the films which promote pitting, even after brazing and/or hot bending.
DE88114157T 1987-09-10 1988-08-31 Process for the production of pitting-resistant hard drawn pipes made of copper or copper alloys. Expired - Fee Related DE3888605D1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE88114157T DE3888605D1 (en) 1987-09-10 1988-08-31 Process for the production of pitting-resistant hard drawn pipes made of copper or copper alloys.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3730367A DE3730367C2 (en) 1987-09-10 1987-09-10 Process for the production of pitting-resistant hard drawn tubes made of copper or copper alloys
DE88114157T DE3888605D1 (en) 1987-09-10 1988-08-31 Process for the production of pitting-resistant hard drawn pipes made of copper or copper alloys.

Publications (1)

Publication Number Publication Date
DE3888605D1 true DE3888605D1 (en) 1994-04-28

Family

ID=6335681

Family Applications (2)

Application Number Title Priority Date Filing Date
DE3730367A Expired - Fee Related DE3730367C2 (en) 1987-09-10 1987-09-10 Process for the production of pitting-resistant hard drawn tubes made of copper or copper alloys
DE88114157T Expired - Fee Related DE3888605D1 (en) 1987-09-10 1988-08-31 Process for the production of pitting-resistant hard drawn pipes made of copper or copper alloys.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE3730367A Expired - Fee Related DE3730367C2 (en) 1987-09-10 1987-09-10 Process for the production of pitting-resistant hard drawn tubes made of copper or copper alloys

Country Status (11)

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

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4417455C2 (en) 1994-05-19 1997-09-25 Wieland Werke Ag Use of a corrosion-resistant tube with inner oxide layers
FI107543B (en) 1998-07-30 2001-08-31 Outokumpu Oy A method for making a copper tube
FI20001467A (en) * 2000-06-20 2001-12-21 Outokumpu Oy Process for making internally coated copper or copper alloy tubes

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308436A1 (en) * 1975-04-25 1976-11-19 Cit Alcatel Avoiding carbon deposits during annealing, from lubricants - in the bore of drawn copper tubes, by sweeping with nitrogen
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
DE3018036A1 (en) * 1980-05-10 1981-11-12 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover METHOD OF TREATING COPPER PIPES
IT1160196B (en) * 1983-02-24 1987-03-04 Dalmine Spa HOT DEOXIDATION PROCESS OF SEMI-FINISHED METAL TUBES
DE3415376A1 (en) * 1984-04-25 1985-11-07 Uhlmann, Otto, 3167 Burgdorf Method and apparatus for degreasing tubes
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
FI884071A (en) 1989-03-11
EP0306810A3 (en) 1990-05-30
GR3033568T3 (en) 2000-09-29
EP0306810A2 (en) 1989-03-15
FI884071A0 (en) 1988-09-02
EP0306810B1 (en) 1994-03-23
DK170250B1 (en) 1995-07-17
ES2050684T5 (en) 2000-07-01
YU46572B (en) 1993-11-16
FI94496B (en) 1995-06-15
IE882707L (en) 1989-03-10
IE63028B1 (en) 1995-03-22
PL163146B1 (en) 1994-02-28
YU171088A (en) 1990-04-30
PL274547A1 (en) 1989-05-02
ES2050684T3 (en) 1994-06-01
DK495488A (en) 1989-03-11
PT88473B (en) 1992-11-30
PT88473A (en) 1988-10-01
EP0306810B2 (en) 2000-03-29
DK495488D0 (en) 1988-09-06
DK493288D0 (en) 1988-09-05
ATE103225T1 (en) 1994-04-15
DE3730367C2 (en) 1997-10-09
DE3730367A1 (en) 1989-03-23

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Legal Events

Date Code Title Description
8363 Opposition against the patent
8327 Change in the person/name/address of the patent owner

Owner name: KM EUROPA METAL AG, 49074 OSNABRUECK, DE

8366 Restricted maintained after opposition proceedings
8327 Change in the person/name/address of the patent owner

Owner name: KME GERMANY AG, 49074 OSNABRUECK, DE

8339 Ceased/non-payment of the annual fee