IE882707L - Process for producing pitting resistant copper pipes - Google Patents
Process for producing pitting resistant copper pipesInfo
- Publication number
- IE882707L IE882707L IE882707A IE270788A IE882707L IE 882707 L IE882707 L IE 882707L IE 882707 A IE882707 A IE 882707A IE 270788 A IE270788 A IE 270788A IE 882707 L IE882707 L IE 882707L
- Authority
- IE
- Ireland
- Prior art keywords
- tubes
- films
- hard
- copper
- pitting
- Prior art date
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title abstract 4
- 229910052802 copper Inorganic materials 0.000 title abstract 4
- 239000010949 copper Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 2
- 229910052799 carbon Inorganic materials 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 238000005422 blasting Methods 0.000 abstract 1
- 238000005219 brazing Methods 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000013003 hot bending Methods 0.000 abstract 1
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
- Mechanical Engineering (AREA)
- Engineering & Computer Science (AREA)
- Metal Extraction Processes (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Heat Treatment Of Articles (AREA)
- Meat, Egg Or Seafood Products (AREA)
- Chemical Treatment Of Metals (AREA)
- ing And Chemical Polishing (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Processing Of Meat And Fish (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Cleaning In General (AREA)
- Saccharide Compounds (AREA)
- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
- Rigid Pipes And Flexible Pipes (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.
[EP0306810A2]
Applications Claiming Priority (1)
| 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE882707L true IE882707L (en) | 1989-03-10 |
| IE63028B1 IE63028B1 (en) | 1995-03-22 |
Family
ID=6335681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE270788A IE63028B1 (en) | 1987-09-10 | 1988-09-07 | Process for producing pitting-resistant hard-drawn pipes 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)
| 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 | Process for making a copper tube |
| FI20001467L (en) * | 2000-06-20 | 2001-12-21 | Outokumpu Oy | Method for manufacturing internally coated copper or copper alloy pipes |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2308436A1 (en) * | 1975-04-25 | 1976-11-19 | Cit Alcatel | TREATMENT OF COPPER AND ALLOY TUBES FOR THE ELIMINATION OF CARBON PRODUCTS EXISTING FROM THEIR SURFACE |
| 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 |
-
1987
- 1987-09-10 DE DE3730367A patent/DE3730367C2/en not_active Expired - Fee Related
-
1988
- 1988-08-31 EP EP88114157A patent/EP0306810B2/en not_active Expired - Lifetime
- 1988-08-31 DE DE88114157T patent/DE3888605D1/en not_active Expired - Fee Related
- 1988-08-31 AT AT88114157T patent/ATE103225T1/en not_active IP Right Cessation
- 1988-08-31 ES ES88114157T patent/ES2050684T5/en not_active Expired - Lifetime
- 1988-09-02 FI FI884071A patent/FI94496B/en not_active Application Discontinuation
- 1988-09-05 DK DK493288A patent/DK493288D0/en not_active Application Discontinuation
- 1988-09-06 DK DK495488A patent/DK170250B1/en not_active IP Right Cessation
- 1988-09-07 PL PL88274547A patent/PL163146B1/en not_active IP Right Cessation
- 1988-09-07 IE IE270788A patent/IE63028B1/en not_active IP Right Cessation
- 1988-09-08 YU YU171088A patent/YU46572B/en unknown
- 1988-09-09 PT PT88473A patent/PT88473B/en not_active IP Right Cessation
-
2000
- 2000-05-31 GR GR20000401261T patent/GR3033568T3/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| GR3033568T3 (en) | 2000-09-29 |
| YU46572B (en) | 1993-11-16 |
| DK495488D0 (en) | 1988-09-06 |
| ATE103225T1 (en) | 1994-04-15 |
| EP0306810A2 (en) | 1989-03-15 |
| ES2050684T5 (en) | 2000-07-01 |
| DE3730367C2 (en) | 1997-10-09 |
| YU171088A (en) | 1990-04-30 |
| PL163146B1 (en) | 1994-02-28 |
| EP0306810B2 (en) | 2000-03-29 |
| DE3888605D1 (en) | 1994-04-28 |
| EP0306810A3 (en) | 1990-05-30 |
| PT88473B (en) | 1992-11-30 |
| ES2050684T3 (en) | 1994-06-01 |
| DK495488A (en) | 1989-03-11 |
| DK493288D0 (en) | 1988-09-05 |
| PT88473A (en) | 1988-10-01 |
| FI94496B (en) | 1995-06-15 |
| PL274547A1 (en) | 1989-05-02 |
| FI884071A0 (en) | 1988-09-02 |
| EP0306810B1 (en) | 1994-03-23 |
| DE3730367A1 (en) | 1989-03-23 |
| FI884071L (en) | 1989-03-11 |
| DK170250B1 (en) | 1995-07-17 |
| IE63028B1 (en) | 1995-03-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |