| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_27e0cface7aaef52b9ec501d7a686312 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22F1-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B24C3-325
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C22F1-08 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22F1-02
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B24C3-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C22F1-08
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C23G5-00 |
| filingDate |
1994-09-13-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b51999c49b0b3f90d5e9f78277e4985c
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ac2dc9b05facb284b364ee0ab21432d9
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b82c3b7099092124bed66992ec79bde |
| publicationDate |
1995-04-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
EP-0647723-A1 |
| titleOfInvention |
Process for manufacturing of seamless drawn medium hard/hard copper fitting tubes |
| abstract |
In this process, hot-formed copper pre-pipes are first cold-formed from cast rods by pulling them to an intermediate dimension. Then the inner surfaces of these intermediate tubes are roughened and then these roughened intermediate tubes are annealed at a temperature of 350 ° C. to 650 ° C. and with an inert gas containing oxygen introduced into the interior of the tube. The intermediate tubes are then subjected to a semi-hard / hard hardening train, which is followed by a thermal treatment at a temperature of 175 ° C. to 275 ° C. while introducing an oxygen-containing gas mixture into the interior of the tube. This manufacturing process significantly reduces the copper ion release from hard / semi-hard installation pipes in rod form made of SF-Cu for central drinking water supply with constant resistance to pitting corrosion. The maximum copper ion solubility is around 1 mg / l in drinking water with a pH in the range of 6.5 to 9.0. |
| isCitedBy |
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EA-007545-B1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6434967-B2
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2004078372-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-19533410-B4
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0976845-A1
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0955394-A3
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I719750-B
http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0955394-A2 |
| priorityDate |
1993-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |