This report describes the work performed by Ingersoll-Rand Research, Inc. under Phase I, Pilot-Plant Experience and Literature Search for the contract entitled, Centrifugal Slurry Pump Wear and Hydraulic Studies. The pilot plants' operating experience on centrifugal slurry pumps was gathered from SRC-1, H-Coal, and EDS coal liquefaction plants. The details on these findings are presented in this report. Hydraulic design, material selections, and slurry characteristics are some of the key areas which affect wear in centrifugal pumps. The effect of various design and operation parameters on pump wear at different locations is discussed. Material properties as they affect wear, the slurry wear process, test methods, and key results are also presented. 68 references, 3 figures, 5 tables.