FI118050B - Process for making a copper installation pipe - Google Patents

Process for making a copper installation pipe Download PDF

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Publication number
FI118050B
FI118050B FI960222A FI960222A FI118050B FI 118050 B FI118050 B FI 118050B FI 960222 A FI960222 A FI 960222A FI 960222 A FI960222 A FI 960222A FI 118050 B FI118050 B FI 118050B
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FI
Finland
Prior art keywords
copper
copper tube
tube
drinking water
making
Prior art date
Application number
FI960222A
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Finnish (fi)
Swedish (sv)
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FI960222A (en
FI960222A0 (en
Inventor
Ulrich Reiter
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Km Europa Metal Ag
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Publication date
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Publication of FI960222A0 publication Critical patent/FI960222A0/en
Publication of FI960222A publication Critical patent/FI960222A/en
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Publication of FI118050B publication Critical patent/FI118050B/en

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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

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  • 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)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Metal Extraction Processes (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • ing And Chemical Polishing (AREA)
  • Domestic Plumbing Installations (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)

Abstract

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

Description

118050118050

Menetelmä kuparisen asennusputken valmistamiseksiA method for manufacturing a copper mounting tube

Keksintö koskee menetelmää kuparisen asennusputken valmistamiseksi, jossa on tinattu sisäpinta. Lisäksi keksintö koskee kyseisellä menetelmällä 5 valmistetun kupariputken edullista käyttöä asennusputkena, josta irtoaa aikaisempaa vähemmän kupari-ioneja juomavesiin, joiden pH-arvo on alle 6,5.The invention relates to a method of making a copper mounting tube having a tin-plated inner surface. The invention further relates to the advantageous use of the copper tube produced by the method 5 as an installation tube which releases less copper ions into drinking water having a pH of less than 6.5.

Asennusputkiin, erityisesti juomavesihuollossa käytettäviksi tarkoitettuihin, käytetään saumattomia vedettyjä kupariputkia, jotka täyttävät vaikeuksitta vaatimukset, mitä tulee kupari-ionien irtoamiselle veteen asetettuun yläraja-10 arvoon 3 mg/l 12 tunnin seisauksen jälkeen.Installation pipes, especially those used for potable water supply, use seamless drawn copper tubes that meet the requirements for the release of copper ions to the upper limit of 3 mg / l after 12 hours of standstill without difficulty.

Niiden vaihtelujen vuoksi, joita juomavesien laadussa monesti käytännössä esiintyy, pyrkimyksenä on kuitenkin lisätä turvallisuutta, ts. vähentää edelleen kupari-ionien irtoamista ihmisten käyttöön tarkoitettuihin vesiin. Tämä koskee erityisesti sellaisia juomavesiä, joiden pH-arvo on juomavesiasetuksessa 15 säädetyn alarajan 6,5 alapuolella ja/tai joissa vapaan hiilihapon osuus on erityisen suuri (ke >1,0 mol/m3).However, due to the variations that often occur in the quality of drinking water in practice, the aim is to increase safety, ie to further reduce the release of copper ions to water intended for human consumption. This is particularly the case for drinking waters with a pH below the lower limit of 6.5 set by the Drinking Water Regulation 15 and / or with a particularly high proportion of free carbon dioxide (ke> 1.0 mol / m3).

On periaatteessa jo yritetty vähentää välitöntä kosketusta kuparin ja veden välillä putkien sisäpinnoituksella, esimerkiksi tinalla tai muovilla.In principle, attempts have already been made to reduce the direct contact between copper and water by the internal coating of pipes, for example tin or plastic.

Esimerkiksi US-patenttijulkaisun 4 838 063 perusteella tunnettu val-20 mistusmenetelmä lähtee siitä, että kupariputken sisäpinta pinnoitetaan ensin puhtaalla jauhemaisella tinalla ja sen jälkeen suoritetaan pinnoitteen tasausheh-kutus. Kupariputken sisäpinnalle muodostuu tällöin kupari-tinaseoskerros, jonka • · paksuus on noin 30 pm ja jossa kuparin osuus on yli 80 %. On kuitenkin käynyt ilmi, että sellaiset kerrokset eivät vaikuta pitkään kupari-ionien irtoamista vähen-25 tävästi, koska korroosio tuhoa ne suhteellisen nopeasti tai kupari jää kuten ai- • · · • kaisemminkin juomaveden kanssa kosketuksiin joutuvalle pinnalle.For example, the known manufacturing process based on U.S. Patent No. 4,838,063 discloses that the inner surface of the copper tube is first coated with pure powdered tin and then the coating is annealed. A copper-tin alloy layer is formed on the inner surface of the copper tube with a thickness of about 30 µm and a copper content of more than 80%. However, it has been found that such layers do not have a long-lasting effect on reducing the release of copper ions, because they are relatively rapidly destroyed by corrosion or, as before, on the surface in contact with drinking water.

* · * . Keksintö perustuu siis päämäärään tarjota käytettäväksi kuparinen asennusputki, jonka sisäpinnalla on tinapinnoite, jolloin kupari-ionien irtoaminen juomaveteen jää myös pitkäksi ajaksi vaadittavien raja-arvojen alapuolelle.* · *. The invention is thus based on the object of providing a copper installation tube with a tin coating on its inner surface, whereby the release of copper ions into drinking water is also below the required limits for a long time.

30 Tämä päämäärä saavutetaan keksinnön mukaisesti patenttivaati- • · muksen 1 mukaisilla toimenpiteillä.According to the invention, this object is achieved by the measures according to claim 1.

Edulliset lisätoteutusmuodot ilmenevät patenttivaatimuksista 2 - 4. Keksinnön mukaisella menetelmällä saavutettavat edut ovat erityises- • · · *. ti siinä, että kuparisten asennusputkien sisäpinnalla on nyt koko pinnan alueella • · · 35 tinasta koostuva suojakerros, jolla taataan se, että kupari-ionien irtoaminen juo- • * * • ·* * · 118050 2 maveteen kyetään pitämään arvon 1,0mg/l alapuolella 12 tunnin seisauksen jälkeen mitattuna.Preferred further embodiments are disclosed in claims 2 to 4. The advantages obtained by the process according to the invention are particularly • · · *. This means that the inner surface of the copper installation tubes now has a protective layer of 35 · tin throughout the surface to ensure that copper ions are removed from the drinking water • * * • · * * 118050 2 mav water can hold 1.0mg / l below after 12 hours of downtime.

Keksinnön mukaista menetelmää voidaan soveltaa jatkuvassa valmistusprosessissa erityisen taloudellisesti. Lähtömateriaalina käytettävä asen-5 nusputki, joka koostuu esimerkiksi fosforilla pelkistetystä kuparista ja on kelattu edullisesti vähintään 500 m pitkiksi kiepeiksi, tinataan ensin kemiallisesti. Päättävä muovausveto (vähintään 2 %) asennusputken lopulliseen mittaan johtaa yllättäen tinakerroksen tiivistymiseen, jolloin pinnoituksen jälkeen mahdollisesti jäljellä olleet huokoset sulkeutuvat.The process according to the invention can be applied particularly economically in a continuous manufacturing process. The starting tube 5, which is composed of, for example, phosphorus-reduced copper and is preferably wound in coils of at least 500 m, is first chemically tin-plated. The final molding draw (at least 2%) to the final length of the installation tube suddenly results in the sealing of the tin layer, whereupon any pores remaining after coating are closed.

10 » · • · · • · • · * « 1 • · 1 • · ...10 »· • · • • • • *« 1 • · 1 • · ...

• · • · · : ·1· • · • 1 · ·1·.·· • · • · · • · 1 • · · • 1 · ··1' • · · · · ! *· • · • 1· • · • · • · · «« · * · · « « • 1 ··· • ♦ • · / • · · ...• · • · ·: · 1 · • · • 1 · · 1 ·. · · · · · · 1 · · · 1 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · - - - - * · • · • 1 ·••••••••••••••••••••• ...

• 1 · • 1 · • · · : . Ί • · 1• 1 · • 1 · • · · :. Ί • · 1

Claims (6)

1. Förfarande för framställning av ett monteringsrör av koppar med förtennad inreyta, kännetecknatavatt (1) kopparrörets inre yta förtennas kemiskt och 5 (2) kopparrörets tvärsnitt formas med en finbearbetningsdragning pä 2 %.1. A process for making a copper tube with tinned inert, characterized by (1) the inner surface of the copper tube is chemically tinned and (2) the cross-section of the copper tube is formed with a fine machining of 2%. 2. Förfarande enligt patentkrav 1, kännetecknat avatt pro-cessteget (1) omfattar följande delsteg: (1.1) avlägsnande av fett fran kopparröret med ett flytande fettbort-10 tagningsmedel, (1.2) utbredning av ett 0,5-4 μηη, företrädesvis 1-2 μm, tjockt skikt rent tenn pa kopparrörets inre yta med hjälp av en genomströmningsbehand-ling som skall göras med en förtenningslösning, (1.3) sköljning av kopparröret med vatten och 15 (1.4) därefter torkning av den inre ytan med luft.The method according to claim 1, characterized by the degraded process step (1) comprising the following sub-steps: (1.1) removal of fat from the copper tube with a liquid fat removal agent, (1.2) propagation of a 0.5-4 μηη, preferably 1 -2 µm, thick layer of clean tin on the inner surface of the copper tube by means of a flow-through treatment to be done with a tincture solution, (1.3) rinsing the copper tube with water and (1.4) then drying the inner surface with air. 3. Förfarande enligt patentkrav 2, ka n n et e c k n at av att den kemiska förtenningslösningens temperatur är i delsteget (1.2) 30-80 °C och genomströmningsbehandlingen tar högst 30 minuter.3. A process according to claim 2, characterized in that the temperature of the chemical tincture solution is in the sub-stage (1.2) 30-80 ° C and the flow-through treatment takes a maximum of 30 minutes. 4. Förfarande enligt nagot av patentkraven 1-3, kä n n eteckn at 20 av att kopparröret formas i processteg (2) minst 5 % och högst cirka 40 %.4. A method according to any one of claims 1-3, characterized in that the copper tube is formed in process step (2) at least 5% and at most about 40%. 5. Användning av ett kopparrör som framställts med ett förfarande enligt nägot av patentkraven 1-4 som monteringsrör, fran vilket frigörs färre * · kopparjoner i dricksvattnet än tidigare, varvid dricksvattnets pH-värde är under * 1 2 3 - .···.Use of a copper pipe made by a method according to any of claims 1-4 as a mounting pipe, from which less * * copper ions are released into the drinking water than before, the drinking water pH being below * 1 2 3 - ···. 6,5 och/eller ks-värde är större än 1,0 mol/m . * · • · · • · · • · · tl1 ··· • ♦ · ♦ · · *· • • ·· * · · * ♦ • · • · · • 1 · ·· • 1 • » *·1 · • · » ·· • · · • · 1 • · 1 · 2 ···. 3 • ·6.5 and / or ks value is greater than 1.0 mol / m. * · • · · · · · · · · tl1 ··· • ♦ · ♦ · · * · • • ·· * · · * ♦ • · · · • 1 · ·· • 1 • »* · 1 · • · »·· • · · • · 1 • · 1 · 2 ···. 3 • ·
FI960222A 1995-01-18 1996-01-17 Process for making a copper installation pipe FI118050B (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 (3)

Publication Number Publication Date
FI960222A0 FI960222A0 (en) 1996-01-17
FI960222A FI960222A (en) 1996-07-19
FI118050B true FI118050B (en) 2007-06-15

Family

ID=7751689

Family Applications (1)

Application Number Title Priority Date Filing Date
FI960222A FI118050B (en) 1995-01-18 1996-01-17 Process for making a copper installation pipe

Country Status (5)

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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
DE59809499D1 (en) * 1998-07-08 2003-10-09 Mkm Mansfelder Kupfer Und Mess Process for the production of copper pipes
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
DE59601571D1 (en) 1999-05-12
EP0723037B1 (en) 1999-04-07
FI960222A (en) 1996-07-19
DE19501274A1 (en) 1996-07-25
EP0723037A1 (en) 1996-07-24
ATE178661T1 (en) 1999-04-15
FI960222A0 (en) 1996-01-17
ES2130699T3 (en) 1999-07-01

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