EP 0690944 B1 19980902 - METHOD OF CLEANING AND MAINTAINING POTABLE WATER DISTRIBUTION PIPE SYSTEMS
Title (en)
METHOD OF CLEANING AND MAINTAINING POTABLE WATER DISTRIBUTION PIPE SYSTEMS
Title (de)
VERFAHREN ZUM REINIGEN VON BOHRLEITUNGEN VON TRINKWASSERVERSORGUNGSANLAGEN
Title (fr)
PROCEDE POUR LE NETTOYAGE ET L'ENTRETIEN DE SYSTEMES DE CONDUITES DE DISTRIBUTION D'EAU POTABLE
Publication
Application
Priority
- US 9403065 W 19940322
- US 3618893 A 19930323
- US 20995394 A 19940317
Abstract (en)
[origin: WO9421865A1] A method of cleaning and maintaining potable water distribution system 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 introduced 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); B08B 9/027 (2006.01); B08B 9/032 (2006.01); C11D 7/08 (2006.01); C11D 7/26 (2006.01); C11D 7/32 (2006.01); C11D 11/00 (2006.01); C23G 1/02 (2006.01); C23G 1/08 (2006.01); E03B 7/09 (2006.01)
CPC (source: EP)
B08B 9/032 (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); C11D 2111/20 (2024.01)
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 9421865 A1 19940929; AT E170583 T1 19980915; AU 6490394 A 19941011; AU 673426 B2 19961107; BR 9406139 A 19960130; CA 2157916 A1 19940929; CA 2157916 C 20000125; DE 69413017 D1 19981008; DE 69413017 T2 19990128; EP 0690944 A1 19960110; EP 0690944 B1 19980902; JP 3597193 B2 20041202; JP H08509908 A 19961022
DOCDB simple family (application)
US 9403065 W 19940322; AT 94912283 T 19940322; AU 6490394 A 19940322; BR 9406139 A 19940322; CA 2157916 A 19940322; DE 69413017 T 19940322; EP 94912283 A 19940322; JP 52131394 A 19940322