The ability of a flow-sedimentation model to simulate the Bow of a slowly-settling suspension being transported in the laminar regime through a pipeline with a constant overall pressure drop imposed on it was assessed using experimental scaled-down pipeline data. Comparison of predicted volumetric Bow rate versus time profiles to those observed suggested that the blockage process took place in two steps. Initially, a sediment grew on the law er pipe wall and the now gradually lessened, as was modelled. As the flow slowed dawn, ultimately a plug, which enclosed the full cross-section of the pipe, formed and lead to the rapid blockage of the pipe. It was envisioned that the granular properties of the concentrated suspension became-dominant during the final blockage process. A deposit velocity criterion was also developed from the flow-sedimentation model and was used to generate a deposit velocity versus pipe diameter plot, Results from the plot indicate that The laminar pipeline flow of a slowly-settling suspension is possible in small diameter pipes.