Patent ID: 6010575
Filing Date: 2000-01-04
Classification: B08B

Abstract:
A process for pipe cleaning comprising:a) providing at least two cleaning modules, each carrying a different cleaning tip, or providing at least one cleaning module to which at least two different non-removable cleaning tips are attached, the cleaning module or modules being propellable through a pipe by a hydraulic fluid;b) successively applying at least two cleaning tips to an inner surface of the pipe using the one or more cleaning modules, the cleaning tips including a first tip and a second tip that is less abrasive than the first tip, in an alternating sequence that cycles each tip through the pipe about 2 to about 25 times before switching to the other tip;c) periodically inspecting the hydraulic fluid as it exits the pipe to determine whether further abrasive cleaning is required and repeating step b) until no further abrasive cleaning is required; andd) applying a third tip, that is less abrasive than the first and second tips, to the surface of the pipe for about 10 to about 60 cycles after determining that no further abrasive cleaning is required.