EP0723037B1 - Process for manufacturing a copper pipe - Google Patents

Process for manufacturing a copper pipe Download PDF

Info

Publication number
EP0723037B1
EP0723037B1 EP96100191A EP96100191A EP0723037B1 EP 0723037 B1 EP0723037 B1 EP 0723037B1 EP 96100191 A EP96100191 A EP 96100191A EP 96100191 A EP96100191 A EP 96100191A EP 0723037 B1 EP0723037 B1 EP 0723037B1
Authority
EP
European Patent Office
Prior art keywords
copper pipe
copper
internal surface
pipe
drinking water
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
EP96100191A
Other languages
German (de)
French (fr)
Other versions
EP0723037A1 (en
Inventor
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
Application filed by KM Europa Metal AG filed Critical KM Europa Metal AG
Publication of EP0723037A1 publication Critical patent/EP0723037A1/en
Application granted granted Critical
Publication of EP0723037B1 publication Critical patent/EP0723037B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals

Definitions

  • the invention relates to a method for producing a Installation pipe made of copper with a tinned inner surface.
  • the invention further relates to the preferred use of the copper pipe produced by this process as Installation pipe with reduced release of copper ions Drinking water with a pH below 6.5.
  • the invention is therefore based on the object of an installation pipe made of copper with a tin coating on the inner surface to provide, in the long term, the levy of copper ions to the drinking water below the required Limits remain.
  • An installation pipe for example consists of copper deoxidized with phosphorus and which preferably in coils of at least 500 m Length rolled up, first chemically tinned.
  • the final one Deformation tension by at least 2% on the final dimension of the installation pipe surprisingly leads to a densification of the tin layer, after coating any remaining pores are closed.

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemically Coating (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Metal Extraction Processes (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Domestic Plumbing Installations (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • ing And Chemical Polishing (AREA)

Abstract

Copper tubing is chemically tin coated on the inside surface before the tube cross-section is reduced by ≥ 2 %.

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines Installationsrohrs aus Kupfer mit einer verzinnten Innenoberfläche. Ferner betrifft die Erfindung die bevorzugte Verwendung des nach diesem Verfahren hergestellten Kupferrohrs als Installationsrohr mit verminderter Abgabe von Kupferionen an Trinkwässer mit einem pH-Wert unterhalb von 6,5.The invention relates to a method for producing a Installation pipe made of copper with a tinned inner surface. The invention further relates to the preferred use of the copper pipe produced by this process as Installation pipe with reduced release of copper ions Drinking water with a pH below 6.5.

Für Installationsrohre, insbesondere zum Einsatz bei der Trinkwasserversorgung, werden nahtlos gezogene Kupferrohre eingesetzt, die die Anforderungen hinsichtlich des Maximalgrenzwerts der Kupferionenabgabe an das Wasser von 3 mg/l nach 12 Stunden Stagnation in der Rohrleitung ohne weiteres erfüllen.For installation pipes, especially for use with the Drinking water supply, seamlessly drawn copper pipes used the requirements regarding the maximum limit the copper ion release to the water of 3 mg / l after 12 hours of stagnation in the pipeline without any problems fulfill.

Wegen der in der Praxis häufig auftretenden Schwankungen in der Qualität der Trinkwässer ist man jedoch bestrebt, die Sicherheit zu vergrößern, d. h. die Abgabe von Kupferionen an die zum menschlichen Verbrauch bestimmten Wässer weiter zu reduzieren. Dies trifft insbesondere für solche Trinkwässer zu, deren pH-Wert unterhalb des in der Trinkwasserverordnung vorgesehenen unteren Grenzwerts von 6,5 liegt und/oder die über einen besonders hohen Anteil an freier Kohlensäure (kB > 1,0 mol/m3) verfügen.However, because of the fluctuations in the quality of drinking water that often occur in practice, efforts are being made to increase safety, ie to further reduce the release of copper ions into the water intended for human consumption. This applies in particular to drinking water whose pH is below the lower limit of 6.5 stipulated in the Drinking Water Ordinance and / or which has a particularly high proportion of free carbonic acid (k B > 1.0 mol / m 3 ) .

Grundsätzlich hat man schon versucht, den unmittelbaren Kontakt zwischen Kupfer und Wasser durch eine Innenbeschichtung der Rohre, beispielsweise mit Zinn oder Kunststoff zu vermindern. Basically you have already tried direct contact between copper and water through an inner coating reduce the pipes, for example with tin or plastic.

So geht beispielsweise ein aus der US-PS 48 38 063 bekanntes Herstellungsverfahren davon aus, zunächst die Innenoberfläche eines Kupferrohrs mit pulverförmigem Reinzinn zu beschichten, und die Beschichtung dann einer nachfolgenden Diffusionsglühung zu unterwerfen. Hierbei entsteht an der Innenoberfläche des Kupferrohrs eine Kupfer/Zinn-Legierungsschicht mit einer Dicke von etwa 30 µm, deren Kupferanteil über 80 % beträgt. Es hat sich jedoch gezeigt, daß derartige Schichten keine Langzeitwirkung für die Verminderung der Kupferionenabgabe aufweisen, da sie durch Korrosion relativ schnell zerstört werden bzw. Kupfer nach wie vor an der mit dem Trinkwasser in Kontakt tretenden Oberfläche verbleibt.For example, one known from US Pat. No. 4,838,063 Manufacturing process assumes first the inner surface to coat a copper pipe with powdered pure tin, and then coating a subsequent diffusion anneal to subjugate. This creates on the inner surface a copper / tin alloy layer with a Thickness of about 30 microns, the copper content is over 80%. However, it has been shown that such layers do not Long-term effect for the reduction of copper ion release exhibit because they are destroyed relatively quickly by corrosion or copper still on the one with the drinking water contacting surface remains.

Der Erfindung liegt daher die Aufgabe zugrunde, ein Installationsrohr aus Kupfer mit einer Zinnbeschichtung der Innenoberfläche bereitzustellen, bei dem auch langfristig die Abgabe von Kupferionen an das Trinkwasser unterhalb der geforderten Grenzwerte bleibt.The invention is therefore based on the object of an installation pipe made of copper with a tin coating on the inner surface to provide, in the long term, the levy of copper ions to the drinking water below the required Limits remain.

Diese Aufgabe wird erfindungsgemäß durch die Maßnahmen des Patentanspruchs 1 gelöst.This object is achieved by the measures of Claim 1 solved.

Vorteilhafte Weiterbildungen ergeben sich aus den Maßnahmen der Unteransprüche 2 bis 4.Advantageous further training results from the measures of subclaims 2 to 4.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß nunmehr an der Innenoberfläche von Installationsrohren aus Kupfer eine vollflächige Schutzschicht aus Zinn vorhanden ist, durch die gewährleistet ist, daß die Abgabe von Kupferionen an das Trinkwasser nach einer 12-stündigen Stagnation unterhalb von 1,0 mg/l gehalten werden kann. The advantages achieved with the invention are in particular in that now on the inner surface of installation pipes a full-surface protective layer made of copper Tin is present, which ensures that the Release of copper ions into the drinking water after a 12 hour period Stagnation can be kept below 1.0 mg / l can.

Das erfindungsgemäße Verfahren läßt sich in einem kontinuierlichen Fertigungsprozeß besonders wirtschaftlich durchführen. Als Ausgangsmaterial wird ein Installationsrohr, das beispielsweise aus einem mit Phosphor desoxidiertem Kupfer besteht und welches vorzugsweise in Coils von mindestens 500 m Länge aufgerollt ist, zunächst chemisch verzinnt. Der abschließende Verformungszug um mindestens 2 % auf die Endabmessung des Installationsrohrs führt überraschenderweise zu einer Verdichtung der Zinnschicht, wobei nach der Beschichtung eventuell verbliebende Poren geschlossen werden.The process according to the invention can be carried out in a continuous Execute manufacturing process particularly economically. An installation pipe, for example consists of copper deoxidized with phosphorus and which preferably in coils of at least 500 m Length rolled up, first chemically tinned. The final one Deformation tension by at least 2% on the final dimension of the installation pipe surprisingly leads to a densification of the tin layer, after coating any remaining pores are closed.

Claims (5)

  1. Method for producing an installation pipe made of copper with a tinned internal surface, characterised by the following process steps:
    1. chemical tinning of the internal surface of the copper pipe;
    2. working of the cross-section of the copper pipe by production drawing by at least 2%.
  2. Method according to claim 1, characterised in that process step 1 consists of the following part steps:
    1.1 degreasing of the copper pipe with a liquid degreasing agent;
    1.2 application of a coating of pure with a thickness of 0.5 to 4 µm, preferably 1 to 2 µm, on the internal surface of the copper pipe by means of continuous treatment with a timing solution;
    1.3 rinsing of the copper pipe with water and
    1.4 subsequent drying of the internal surface with air.
  3. Method according to claim 2, characterised in that the chemical tinning solution in part step 1.2 has a temperature of 30 to 80°C and the continuous treatment is carried out for a maximum time of 30 minutes.
  4. Method according to at least one of claims 1 to 3, characterised in that during the process step 2 the copper pipe is worked by 5% to approximately 40%.
  5. Use of a copper pipe produced by the method according to one of claims 1 to 4 as an installation pipe with reduced emission of copper ions to drinking water the pH value of which lies below 6.5 and/or the kB value of which is greater than 1.0 mol/m3.
EP96100191A 1995-01-18 1996-01-09 Process for manufacturing a copper pipe Expired - Lifetime EP0723037B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19501274A DE19501274A1 (en) 1995-01-18 1995-01-18 Process for manufacturing an installation pipe made of copper
DE19501274 1995-01-18

Publications (2)

Publication Number Publication Date
EP0723037A1 EP0723037A1 (en) 1996-07-24
EP0723037B1 true EP0723037B1 (en) 1999-04-07

Family

ID=7751689

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100191A Expired - Lifetime EP0723037B1 (en) 1995-01-18 1996-01-09 Process for manufacturing a copper pipe

Country Status (5)

Country Link
EP (1) EP0723037B1 (en)
AT (1) ATE178661T1 (en)
DE (2) DE19501274A1 (en)
ES (1) ES2130699T3 (en)
FI (1) FI118050B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR1003280B (en) * 1998-01-22 1999-12-06 v 9 ��@ 0#0 6f@*t 5�*5 @*�*:*� s5 s@6*t 99#0 Method of manufacturing of copper tubes with their internal surface tin plated by electrolysis
EP0979688B1 (en) * 1998-07-08 2003-09-03 MKM Mansfelder Kupfer und Messing GmbH Method of manufacturing copper tubes
DE19915574A1 (en) * 1999-03-30 2000-10-12 Sms Demag Ag Process for the production of the internally and / or externally tinned hollow profile and internally tinned copper tube
FI120268B (en) * 2003-12-12 2009-08-31 Cupori Group Oy A method for coating a tube

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2282511A (en) * 1940-03-20 1942-05-12 American Brass Co Coating cupreous surfaces with tin

Also Published As

Publication number Publication date
FI960222A (en) 1996-07-19
DE19501274A1 (en) 1996-07-25
EP0723037A1 (en) 1996-07-24
FI118050B (en) 2007-06-15
ES2130699T3 (en) 1999-07-01
ATE178661T1 (en) 1999-04-15
FI960222A0 (en) 1996-01-17
DE59601571D1 (en) 1999-05-12

Similar Documents

Publication Publication Date Title
EP0576733B1 (en) Process for producing a multilayered metal pipe
DE2510328C2 (en) Process for improving the corrosion resistance of moldings made of steel or iron
EP2766653A1 (en) Method for coating pipes
WO2006045570A1 (en) Method for producing a steel sheet protected against corrosion
EP0723037B1 (en) Process for manufacturing a copper pipe
DE4009366C2 (en)
DE10003031B4 (en) Coated steel product
EP0979688B1 (en) Method of manufacturing copper tubes
DE2632439A1 (en) PROCESS FOR PRODUCING A STEEL SHEET COATED WITH ALUMINUM OR AN ALUMINUM ALLOY
DE2254857C3 (en) Process for making wear resistant nickel dispersion coatings
EP0647723B1 (en) Process for manufacturing of seamless drawn medium hard/hard copper fitting tubes
DE102010015389B4 (en) Spring wire, spring with it and manufacturing process therefor
DE3124161A1 (en) "METHOD FOR WARM METALLIZING METAL OBJECTS"
DE102005006885B4 (en) Pivot pin for a ball joint and method for producing such a
EP0851041A1 (en) Copper tube plated on the inside with tin and process for plating of a copper tube
DE19633615C2 (en) Process for applying a solderable metallic outer coating to an aluminum alloy wire
EP2034054B1 (en) Method for manufacturing a coated components for fluid carrying assembly sections and coated component
DE3016179A1 (en) METHOD FOR PRODUCING A CORRUGATED, COPPER-STABILIZED NB (DOWN ARROW) 3 (DOWN ARROW) SN SUPER LADDER
EP1120477B1 (en) Method of manufacturing a tin layer on the internal surface of copper alloy hollow elements
EP0978666B1 (en) Swaged steel fitting and method of its manufacture
DE4321244C2 (en) Installation pipe made of copper with tin oxide inner layer and method for coating the same
DE19617169A1 (en) Flat tube heat exchanger production
DE29614464U1 (en) Wire with a solderable metallic outer coating on an aluminum alloy
EP0864667B1 (en) Method of manufacturing a corrosion-resistant tube
DE69318217T2 (en) Coated sheet and process for its manufacture

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE ES FR GB IT NL SE

17P Request for examination filed

Effective date: 19970109

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

17Q First examination report despatched

Effective date: 19980629

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE ES FR GB IT NL SE

REF Corresponds to:

Ref document number: 178661

Country of ref document: AT

Date of ref document: 19990415

Kind code of ref document: T

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19990408

REF Corresponds to:

Ref document number: 59601571

Country of ref document: DE

Date of ref document: 19990512

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2130699

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20090218

Year of fee payment: 14

Ref country code: AT

Payment date: 20090113

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20090104

Year of fee payment: 14

Ref country code: DE

Payment date: 20090102

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20090107

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090213

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20090108

Year of fee payment: 14

Ref country code: IT

Payment date: 20090127

Year of fee payment: 14

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090113

Year of fee payment: 14

BERE Be: lapsed

Owner name: *KM EUROPA METAL A.G.

Effective date: 20100131

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20100801

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20100109

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100801

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100803

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100131

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20110307

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100109

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110304

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100110

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100110