Abstract: Storage means receives a particulate material and conduit means are provided for receiving an inert pressurized fluid medium. The conduit means is connected with a conduit such as a pipeline to be cleaned and includes by-pass conduit means for communicating a portion of the inert pressurized fluid medium into the storage means to maintain the particulate material under predetermined pressure. Branch conduit means connected to the conduit means communicates with the storage means for receiving particulate material therefrom and discharging it along with the inert pressurized fluid medium from the inert pressurized fluid medium conduit into the pipeline to be cleaned. Moveable barrier means are mounted in the pipeline against which the inert pressurized fluid medium and the particulate material is propelled. The barrier means includes a deflector for impinging such particulate material against the interior of the conduit thereof.

Abstract: Storage means receives a particulate material and conduit means are provided for receiving an inert pressurized fluid medium. The conduit means is connected with a conduit such as a pipeline to be cleaned and includes by-pass conduit means for communicating a portion of the inert pressurized fluid medium into the storage means to maintain the particulate material under predetermined pressure. Branch conduit means connected to the conduit means communicates with the storage means for receiving particulate material therefrom and discharging it along with the inert pressurized fluid medium from the inert pressurized fluid medium conduit into the pipeline to be cleaned. Moveable barrier means are mounted in the pipeline against which the inert pressurized fluid medium and the particulate material is propelled. The barrier means includes a deflector for impinging such particulate material against the interior of the conduit thereof.