Title (en)

Method for producing copper tubes

Title (de)

Verfahren zur Herstellung von Kupferrohren

Title (fr)

Procédé pour la fabrication de tubes en cuivre

Publication

EP 0976845 A1 20000202 (EN)

Application

EP 99114365 A 19990721

Priority

FI 981683 A 19980730

Abstract (en)

Invention focuses on a method for producing copper tube and particularly for hard-drawn temper sanitary tube. According to the method developed, the extruded tube shell is cold formed until almost its final size, after which the tube undergoes inline annealing in oxidizing conditions in order to adjust the tube to its final size in the cold forming step with finally sand blasting to the inner surface of the tube. Through this method, the use of organic solvents is avoided and at the same time a tube with excellent corrosion resistance is achieved.

IPC 1-7

C22F 1/08; C22F 1/02; B24C 3/32

IPC 8 full level

C22F 1/02 (2006.01); C22F 1/08 (2006.01)

CPC (source: EP)

C22F 1/02 (2013.01); C22F 1/08 (2013.01)

Citation (applicant)

• EP 0306810 A2 19890315 - KABEL METALLWERKE GHH [DE]
• EP 0281641 A1 19880914 - WIELAND WERKE AG [DE]

Citation (search report)

• [A] EP 0356732 A1 19900307 - KABELMETAL AG [DE]
• [A] EP 0335999 A1 19891011 - WIELAND WERKE AG [DE]
• [DA] EP 0647723 A1 19950412 - KABELMETAL AG [DE]
• [A] US 4351678 A 19820928 - ANDRIEN YVES, et al
• [A] DE 3003228 B1 19810326 - WIELAND WERKE AG
• [A] GB 2055061 A 19810225 - LIEGE USINES CUIVRE ZINC
• [A] GB 1461961 A 19770119 - LIEGE USINES CUIVRE ZINC
• [A] US 4393566 A 19830719 - UHLMANN OTTO [DE], et al
• [DA] EP 0281641 A1 19880914 - WIELAND WERKE AG [DE]

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

EP 0976845 A1 20000202; EP 0976845 B1 20030716; AT E245208 T1 20030815; DE 69909565 D1 20030821; DE 69909565 T2 20040129; DK 0976845 T3 20031027; ES 2202969 T3 20040401; FI 107543 B 20010831; FI 981683 A0 19980730; FI 981683 A 20000131; NO 312619 B1 20020610; NO 993683 D0 19990729; NO 993683 L 20000131; PL 189820 B1 20050930; PL 334652 A1 20000131; PT 976845 E 20031031

DOCDB simple family (application)

EP 99114365 A 19990721; AT 99114365 T 19990721; DE 69909565 T 19990721; DK 99114365 T 19990721; ES 99114365 T 19990721; FI 981683 A 19980730; NO 993683 A 19990729; PL 33465299 A 19990728; PT 99114365 T 19990721