EP 0766765 A1 19970409 - METHOD OF CLEANING AND MAINTAINING POTABLE WATER DISTRIBUTION PIPE SYSTEMS WITH A HEATED CLEANING SOLUTION
Title (en)
METHOD OF CLEANING AND MAINTAINING POTABLE WATER DISTRIBUTION PIPE SYSTEMS WITH A HEATED CLEANING SOLUTION
Title (de)
VERFAHREN ZUM REINIGUNG UND WARTUNG VON TRINKWASSERVERSORGUNGSSYSTEME MIT EINER ERWÄRMTEN REINIGUNGSLÖSUNG
Title (fr)
PROCEDE DE NETTOYAGE ET D'ENTRETIEN DE SYSTEMES DE CONDUITES DE DISTRIBUTION D'EAU POTABLE AU MOYEN D'UNE SOLUTION DE NETTOYAGE CHAUFFEE
Publication
Application
Priority
- US 9507546 W 19950614
- US 26260194 A 19940620
Abstract (en)
[origin: WO9535419A1] A method of cleaning and maintaining potable water distribution systems which have reduced flow due to an increase of water scale deposits, sediment, and the like on the inside surface of the pipe is disclosed. An aqueous acidic cleaning solution (12) is heated and circulated through the pipe (25) to be treated for a sufficient time to dissolve and loosen the scale and sediment, and the spent solution containing dissolved or suspended scale and sediment is flushed from the pipe (25) to provide a cleaned pipe with improved water flow. It is also desirable to flush the water distribution pipe system with high pressure water after the treatment to remove loosened scale and sediment that was not removed during the circulation and flushing of the treating solution (12).
IPC 1-7
IPC 8 full level
B08B 9/02 (2006.01); C02F 5/08 (2006.01); C11D 3/02 (2006.01); C11D 3/20 (2006.01); C11D 3/34 (2006.01); C11D 7/08 (2006.01); C11D 7/26 (2006.01); C11D 7/32 (2006.01); C23G 1/02 (2006.01); E03B 7/09 (2006.01)
CPC (source: EP)
B08B 9/032 (2013.01); C02F 5/08 (2013.01); C02F 5/083 (2013.01); C11D 3/042 (2013.01); C11D 3/2079 (2013.01); C11D 3/2082 (2013.01); C11D 3/2086 (2013.01); C11D 3/3418 (2013.01); C11D 7/08 (2013.01); C11D 7/265 (2013.01); C11D 7/3218 (2013.01); C23G 1/02 (2013.01); E03B 7/006 (2013.01)
Citation (search report)
See references of WO 9535419A1
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
WO 9535419 A1 19951228; AU 2828395 A 19960115; BR 9505483 A 19970812; CA 2193494 A1 19951228; CA 2193494 C 19991207; EP 0766765 A1 19970409; IL 114194 A0 19951031; MY 115961 A 20031031
DOCDB simple family (application)
US 9507546 W 19950614; AU 2828395 A 19950614; BR 9505483 A 19950614; CA 2193494 A 19950614; EP 95923862 A 19950614; IL 11419495 A 19950616; MY PI19951617 A 19950615